Commit message: core: allow PIDs to be watched by two units at the same time

In some cases it is interesting to map a PID to two units at the same
time. For example, when a user logs in via a getty, which is reexeced to
/sbin/login that binary will be explicitly referenced as main pid of the
getty service, as well as implicitly referenced as part of the session
scope.
CVE: CVE-2016-7796
CWE: CWE-20
Vulnerability description: The manager_dispatch_notify_fd function in systemd allows local users to cause a denial of service (system hang) via a zero-length message received over a notify socket, which causes an error to be returned and the notification handler to be disabled.

Project: systemd
File: manager.c

void manager_run_generators(Manager *m) {
        _cleanup_closedir_ DIR *d = NULL;
        const char *generator_path;
        const char *argv[5];
        int r;

        assert(m);

        generator_path = m->running_as == SYSTEMD_SYSTEM ? SYSTEM_GENERATOR_PATH : USER_GENERATOR_PATH;
        d = opendir(generator_path);
        if (!d) {
                if (errno == ENOENT)
                        return;

                log_error("Failed to enumerate generator directory %s: %m",
                          generator_path);
                return;
        }

        r = create_generator_dir(m, &m->generator_unit_path, "generator");
        if (r < 0)
                goto finish;

        r = create_generator_dir(m, &m->generator_unit_path_early, "generator.early");
        if (r < 0)
                goto finish;

        r = create_generator_dir(m, &m->generator_unit_path_late, "generator.late");
        if (r < 0)
                goto finish;

        argv[0] = NULL; /* Leave this empty, execute_directory() will fill something in */
        argv[1] = m->generator_unit_path;
        argv[2] = m->generator_unit_path_early;
        argv[3] = m->generator_unit_path_late;
        argv[4] = NULL;

        RUN_WITH_UMASK(0022)
                execute_directory(generator_path, d, (char**) argv);

finish:
        trim_generator_dir(m, &m->generator_unit_path);
        trim_generator_dir(m, &m->generator_unit_path_early);
        trim_generator_dir(m, &m->generator_unit_path_late);
}

Project: systemd
File: unit.c

ExecContext *unit_get_exec_context(Unit *u) {
        size_t offset;
        assert(u);

        offset = UNIT_VTABLE(u)->exec_context_offset;
        if (offset <= 0)
                return NULL;

        return (ExecContext*) ((uint8_t*) u + offset);
}

Project: systemd
File: unit.c

static void unit_check_unneeded(Unit *u) {
        Iterator i;
        Unit *other;

        assert(u);

        /* If this service shall be shut down when unneeded then do
         * so. */

        if (!u->stop_when_unneeded)
                return;

        if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)))
                return;

        SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i)
                if (unit_active_or_pending(other))
                        return;

        SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
                if (unit_active_or_pending(other))
                        return;

        SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i)
                if (unit_active_or_pending(other))
                        return;

        SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i)
                if (unit_active_or_pending(other))
                        return;

        log_info_unit(u->id, "Service %s is not needed anymore. Stopping.", u->id);

        /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
        manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL);
}

Project: systemd
File: unit.c

int unit_add_default_target_dependency(Unit *u, Unit *target) {
        assert(u);
        assert(target);

        if (target->type != UNIT_TARGET)
                return 0;

        /* Only add the dependency if both units are loaded, so that
         * that loop check below is reliable */
        if (u->load_state != UNIT_LOADED ||
            target->load_state != UNIT_LOADED)
                return 0;

        /* If either side wants no automatic dependencies, then let's
         * skip this */
        if (!u->default_dependencies ||
            !target->default_dependencies)
                return 0;

        /* Don't create loops */
        if (set_get(target->dependencies[UNIT_BEFORE], u))
                return 0;

        return unit_add_dependency(target, UNIT_AFTER, u, true);
}

Project: systemd
File: unit.c

int unit_start(Unit *u) {
        UnitActiveState state;
        Unit *following;

        assert(u);

        if (u->load_state != UNIT_LOADED)
                return -EINVAL;

        /* If this is already started, then this will succeed. Note
         * that this will even succeed if this unit is not startable
         * by the user. This is relied on to detect when we need to
         * wait for units and when waiting is finished. */
        state = unit_active_state(u);
        if (UNIT_IS_ACTIVE_OR_RELOADING(state))
                return -EALREADY;

        /* If the conditions failed, don't do anything at all. If we
         * already are activating this call might still be useful to
         * speed up activation in case there is some hold-off time,
         * but we don't want to recheck the condition in that case. */
        if (state != UNIT_ACTIVATING &&
            !unit_condition_test(u)) {
                log_debug_unit(u->id, "Starting of %s requested but condition failed. Ignoring.", u->id);
                return -EALREADY;
        }

        /* Forward to the main object, if we aren't it. */
        following = unit_following(u);
        if (following) {
                log_debug_unit(u->id, "Redirecting start request from %s to %s.",
                               u->id, following->id);
                return unit_start(following);
        }

        unit_status_log_starting_stopping_reloading(u, JOB_START);
        unit_status_print_starting_stopping(u, JOB_START);

        /* If it is stopped, but we cannot start it, then fail */
        if (!UNIT_VTABLE(u)->start)
                return -EBADR;

        /* We don't suppress calls to ->start() here when we are
         * already starting, to allow this request to be used as a
         * "hurry up" call, for example when the unit is in some "auto
         * restart" state where it waits for a holdoff timer to elapse
         * before it will start again. */

        unit_add_to_dbus_queue(u);

        return UNIT_VTABLE(u)->start(u);
}

Project: systemd
File: unit.c

int unit_exec_context_defaults(Unit *u, ExecContext *c) {
        unsigned i;
        int r;

        assert(u);
        assert(c);

        /* This only copies in the ones that need memory */
        for (i = 0; i < RLIMIT_NLIMITS; i++)
                if (u->manager->rlimit[i] && !c->rlimit[i]) {
                        c->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1);
                        if (!c->rlimit[i])
                                return -ENOMEM;
                }

        if (u->manager->running_as == SYSTEMD_USER &&
            !c->working_directory) {

                r = get_home_dir(&c->working_directory);
                if (r < 0)
                        return r;
        }

        return 0;
}

Project: systemd
File: unit.c

int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) {
        int r;

        assert(u);

        if ((r = unit_add_dependency(u, d, other, add_reference)) < 0)
                return r;

        if ((r = unit_add_dependency(u, e, other, add_reference)) < 0)
                return r;

        return 0;
}

Project: systemd
File: unit.c

int unit_watch_bus_name(Unit *u, const char *name) {
        assert(u);
        assert(name);

        /* Watch a specific name on the bus. We only support one unit
         * watching each name for now. */

        return hashmap_put(u->manager->watch_bus, name, u);
}

Project: systemd
File: unit.c

Unit* unit_follow_merge(Unit *u) {
        assert(u);

        while (u->load_state == UNIT_MERGED)
                assert_se(u = u->merged_into);

        return u;
}

Project: systemd
File: unit.c

bool unit_need_daemon_reload(Unit *u) {
        _cleanup_strv_free_ char **t = NULL;
        char **path;
        struct stat st;
        unsigned loaded_cnt, current_cnt;

        assert(u);

        if (u->fragment_path) {
                zero(st);
                if (stat(u->fragment_path, &st) < 0)
                        /* What, cannot access this anymore? */
                        return true;

                if (u->fragment_mtime > 0 &&
                    timespec_load(&st.st_mtim) != u->fragment_mtime)
                        return true;
        }

        if (u->source_path) {
                zero(st);
                if (stat(u->source_path, &st) < 0)
                        return true;

                if (u->source_mtime > 0 &&
                    timespec_load(&st.st_mtim) != u->source_mtime)
                        return true;
        }

        t = unit_find_dropin_paths(u);
        loaded_cnt = strv_length(t);
        current_cnt = strv_length(u->dropin_paths);

        if (loaded_cnt == current_cnt) {
                if (loaded_cnt == 0)
                        return false;

                if (strv_overlap(u->dropin_paths, t)) {
                        STRV_FOREACH(path, u->dropin_paths) {
                                zero(st);
                                if (stat(*path, &st) < 0)
                                        return true;

                                if (u->dropin_mtime > 0 &&
                                    timespec_load(&st.st_mtim) > u->dropin_mtime)
                                        return true;
                        }

                        return false;
                } else
                        return true;
        } else
                return true;
}

Project: systemd
File: unit.c

ExecRuntime *unit_get_exec_runtime(Unit *u) {
        size_t offset;

        offset = UNIT_VTABLE(u)->exec_runtime_offset;
        if (offset <= 0)
                return NULL;

        return *(ExecRuntime**) ((uint8_t*) u + offset);
}

Project: systemd
File: unit.c

int unit_add_node_link(Unit *u, const char *what, bool wants) {
        Unit *device;
        _cleanup_free_ char *e = NULL;
        int r;

        assert(u);

        if (!what)
                return 0;

        /* Adds in links to the device node that this unit is based on */

        if (!is_device_path(what))
                return 0;

        e = unit_name_from_path(what, ".device");
        if (!e)
                return -ENOMEM;

        r = manager_load_unit(u->manager, e, NULL, NULL, &device);

        if (r < 0)
                return r;

        r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BINDS_TO, device, true);
        if (r < 0)
                return r;

        if (wants) {
                r = unit_add_dependency(device, UNIT_WANTS, u, false);
                if (r < 0)
                        return r;
        }

        return 0;
}

Project: systemd
File: unit.c

int unit_add_name(Unit *u, const char *text) {
        UnitType t;
        char *s, *i = NULL;
        int r;

        assert(u);
        assert(text);

        if (unit_name_is_template(text)) {
                if (!u->instance)
                        return -EINVAL;

                s = unit_name_replace_instance(text, u->instance);
        } else
                s = strdup(text);

        if (!s)
                return -ENOMEM;

        if (!unit_name_is_valid(s, TEMPLATE_INVALID)) {
                r = -EINVAL;
                goto fail;
        }

        assert_se((t = unit_name_to_type(s)) >= 0);

        if (u->type != _UNIT_TYPE_INVALID && t != u->type) {
                r = -EINVAL;
                goto fail;
        }

        r = unit_name_to_instance(s, &i);
        if (r < 0)
                goto fail;

        if (i && unit_vtable[t]->no_instances) {
                r = -EINVAL;
                goto fail;
        }

        /* Ensure that this unit is either instanced or not instanced,
         * but not both. */
        if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) {
                r = -EINVAL;
                goto fail;
        }

        if (unit_vtable[t]->no_alias &&
            !set_isempty(u->names) &&
            !set_get(u->names, s)) {
                r = -EEXIST;
                goto fail;
        }

        if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) {
                r = -E2BIG;
                goto fail;
        }

        r = set_put(u->names, s);
        if (r < 0) {
                if (r == -EEXIST)
                        r = 0;
                goto fail;
        }

        r = hashmap_put(u->manager->units, s, u);
        if (r < 0) {
                set_remove(u->names, s);
                goto fail;
        }

        if (u->type == _UNIT_TYPE_INVALID) {

                u->type = t;
                u->id = s;
                u->instance = i;

                LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u);

                if (UNIT_VTABLE(u)->init)
                        UNIT_VTABLE(u)->init(u);
        } else
                free(i);

        unit_add_to_dbus_queue(u);
        return 0;

fail:
        free(s);
        free(i);

        return r;
}

Project: systemd
File: unit.c

bool unit_can_reload(Unit *u) {
        assert(u);

        if (!UNIT_VTABLE(u)->reload)
                return false;

        if (!UNIT_VTABLE(u)->can_reload)
                return true;

        return UNIT_VTABLE(u)->can_reload(u);
}

Project: systemd
File: manager.c

static void unit_gc_sweep(Unit *u, unsigned gc_marker) {
        Iterator i;
        Unit *other;
        bool is_bad;

        assert(u);

        if (u->gc_marker == gc_marker + GC_OFFSET_GOOD ||
            u->gc_marker == gc_marker + GC_OFFSET_BAD ||
            u->gc_marker == gc_marker + GC_OFFSET_IN_PATH)
                return;

        if (u->in_cleanup_queue)
                goto bad;

        if (unit_check_gc(u))
                goto good;

        u->gc_marker = gc_marker + GC_OFFSET_IN_PATH;

        is_bad = true;

        SET_FOREACH(other, u->dependencies[UNIT_REFERENCED_BY], i) {
                unit_gc_sweep(other, gc_marker);

                if (other->gc_marker == gc_marker + GC_OFFSET_GOOD)
                        goto good;

                if (other->gc_marker != gc_marker + GC_OFFSET_BAD)
                        is_bad = false;
        }

        if (is_bad)
                goto bad;

        /* We were unable to find anything out about this entry, so
         * let's investigate it later */
        u->gc_marker = gc_marker + GC_OFFSET_UNSURE;
        unit_add_to_gc_queue(u);
        return;

bad:
        /* We definitely know that this one is not useful anymore, so
         * let's mark it for deletion */
        u->gc_marker = gc_marker + GC_OFFSET_BAD;
        unit_add_to_cleanup_queue(u);
        return;

good:
        u->gc_marker = gc_marker + GC_OFFSET_GOOD;
}

Project: systemd
File: unit.c

static void retroactively_start_dependencies(Unit *u) {
        Iterator i;
        Unit *other;

        assert(u);
        assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)));

        SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i)
                if (!set_get(u->dependencies[UNIT_AFTER], other) &&
                    !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
                        manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);

        SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i)
                if (!set_get(u->dependencies[UNIT_AFTER], other) &&
                    !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
                        manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);

        SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
                if (!set_get(u->dependencies[UNIT_AFTER], other) &&
                    !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
                        manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL);

        SET_FOREACH(other, u->dependencies[UNIT_WANTS], i)
                if (!set_get(u->dependencies[UNIT_AFTER], other) &&
                    !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
                        manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL);

        SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i)
                if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
                        manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);

        SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i)
                if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
                        manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
}

Project: systemd
File: unit.c

void unit_unwatch_pid(Unit *u, pid_t pid) {
        assert(u);
        assert(pid >= 1);

        hashmap_remove_value(u->manager->watch_pids1, LONG_TO_PTR(pid), u);
        hashmap_remove_value(u->manager->watch_pids2, LONG_TO_PTR(pid), u);
        set_remove(u->pids, LONG_TO_PTR(pid));
}

Project: systemd
File: unit.c

KillContext *unit_get_kill_context(Unit *u) {
        size_t offset;
        assert(u);

        offset = UNIT_VTABLE(u)->kill_context_offset;
        if (offset <= 0)
                return NULL;

        return (KillContext*) ((uint8_t*) u + offset);
}

Project: systemd
File: manager.c

static int create_generator_dir(Manager *m, char **generator, const char *name) {
        char *p;
        int r;

        assert(m);
        assert(generator);
        assert(name);

        if (*generator)
                return 0;

        if (m->running_as == SYSTEMD_SYSTEM && getpid() == 1) {
                /* systemd --system, not running --test */

                p = strappend("/run/systemd/", name);
                if (!p)
                        return log_oom();

                r = mkdir_p_label(p, 0755);
                if (r < 0) {
                        log_error("Failed to create generator directory %s: %s",
                                  p, strerror(-r));
                        free(p);
                        return r;
                }
        } else if (m->running_as == SYSTEMD_USER) {
                const char *s = NULL;

                s = getenv("XDG_RUNTIME_DIR");
                if (!s)
                        return -EINVAL;
                p = strjoin(s, "/systemd/", name, NULL);
                if (!p)
                        return log_oom();

                r = mkdir_p_label(p, 0755);
                if (r < 0) {
                        log_error("Failed to create generator directory %s: %s",
                                  p, strerror(-r));
                        free(p);
                        return r;
                }
        } else {
                /* systemd --system --test */

                p = strjoin("/tmp/systemd-", name, ".XXXXXX", NULL);
                if (!p)
                        return log_oom();

                if (!mkdtemp(p)) {
                        log_error("Failed to create generator directory %s: %m",
                                  p);
                        free(p);
                        return -errno;
                }
        }

        *generator = p;
        return 0;
}

Project: systemd
File: manager.c

void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) {
        va_list ap;

        if (!manager_get_show_status(m))
                return;

        /* XXX We should totally drop the check for ephemeral here
         * and thus effectively make 'Type=idle' pointless. */
        if (ephemeral && m->n_on_console > 0)
                return;

        if (!manager_is_booting_or_shutting_down(m))
                return;

        va_start(ap, format);
        status_vprintf(status, true, ephemeral, format, ap);
        va_end(ap);
}

Project: systemd
File: manager.c

void manager_recheck_journal(Manager *m) {
        Unit *u;

        assert(m);

        if (m->running_as != SYSTEMD_SYSTEM)
                return;

        u = manager_get_unit(m, SPECIAL_JOURNALD_SOCKET);
        if (u && SOCKET(u)->state != SOCKET_RUNNING) {
                log_close_journal();
                return;
        }

        u = manager_get_unit(m, SPECIAL_JOURNALD_SERVICE);
        if (u && SERVICE(u)->state != SERVICE_RUNNING) {
                log_close_journal();
                return;
        }

        /* Hmm, OK, so the socket is fully up and the service is up
         * too, then let's make use of the thing. */
        log_open();
}

Project: systemd
File: manager.c

static void manager_build_unit_path_cache(Manager *m) {
        char **i;
        _cleanup_free_ DIR *d = NULL;
        int r;

        assert(m);

        set_free_free(m->unit_path_cache);

        m->unit_path_cache = set_new(string_hash_func, string_compare_func);
        if (!m->unit_path_cache) {
                log_error("Failed to allocate unit path cache.");
                return;
        }

        /* This simply builds a list of files we know exist, so that
         * we don't always have to go to disk */

        STRV_FOREACH(i, m->lookup_paths.unit_path) {
                struct dirent *de;

                d = opendir(*i);
                if (!d) {
                        if (errno != ENOENT)
                                log_error("Failed to open directory %s: %m", *i);
                        continue;
                }

                while ((de = readdir(d))) {
                        char *p;

                        if (ignore_file(de->d_name))
                                continue;

                        p = strjoin(streq(*i, "/") ? "" : *i, "/", de->d_name, NULL);
                        if (!p) {
                                r = -ENOMEM;
                                goto fail;
                        }

                        r = set_consume(m->unit_path_cache, p);
                        if (r < 0)
                                goto fail;
                }

                closedir(d);
                d = NULL;
        }

        return;

fail:
        log_error("Failed to build unit path cache: %s", strerror(-r));

        set_free_free(m->unit_path_cache);
        m->unit_path_cache = NULL;
}

Project: systemd
File: unit.c

_pure_ static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) {
        const char *format;

        assert(u);
        assert(t >= 0);
        assert(t < _JOB_TYPE_MAX);

        format = unit_get_status_message_format(u, t);
        if (format)
                return format;

        /* Return generic strings */
        if (t == JOB_START)
                return "Starting %s.";
        else if (t == JOB_STOP)
                return "Stopping %s.";
        else if (t == JOB_RELOAD)
                return "Reloading %s.";

        return NULL;
}

Project: systemd
File: manager.c

static int manager_setup_notify(Manager *m) {
        union {
                struct sockaddr sa;
                struct sockaddr_un un;
        } sa = {
                .sa.sa_family = AF_UNIX,
        };
        int one = 1, r;

        if (m->notify_fd < 0) {
                _cleanup_close_ int fd = -1;

                /* First free all secondary fields */
                free(m->notify_socket);
                m->notify_socket = NULL;
                m->notify_event_source = sd_event_source_unref(m->notify_event_source);

                fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
                if (fd < 0) {
                        log_error("Failed to allocate notification socket: %m");
                        return -errno;
                }

                if (getpid() != 1 || detect_container(NULL) > 0)
                        snprintf(sa.un.sun_path, sizeof(sa.un.sun_path), NOTIFY_SOCKET "/%" PRIx64, random_u64());
                else
                        strncpy(sa.un.sun_path, NOTIFY_SOCKET, sizeof(sa.un.sun_path));
                sa.un.sun_path[0] = 0;

                r = bind(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1));
                if (r < 0) {
                        log_error("bind() failed: %m");
                        return -errno;
                }

                r = setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
                if (r < 0) {
                        log_error("SO_PASSCRED failed: %m");
                        return -errno;
                }

                sa.un.sun_path[0] = '@';
                m->notify_socket = strdup(sa.un.sun_path);
                if (!m->notify_socket)
                        return log_oom();

                m->notify_fd = fd;
                fd = -1;

                log_debug("Using notification socket %s", m->notify_socket);
        }

        if (!m->notify_event_source) {
                r = sd_event_add_io(m->event, m->notify_fd, EPOLLIN, manager_dispatch_notify_fd, m, &m->notify_event_source);
                if (r < 0) {
                        log_error("Failed to allocate notify event source: %s", strerror(-r));
                        return -errno;
                }

                /* Process signals a bit earlier than SIGCHLD, so that we can
                 * still identify to which service an exit message belongs */
                r = sd_event_source_set_priority(m->notify_event_source, -7);
                if (r < 0) {
                        log_error("Failed to set priority of notify event source: %s", strerror(-r));
                        return r;
                }
        }

        return 0;
}

Project: systemd
File: unit.c

int unit_following_set(Unit *u, Set **s) {
        assert(u);
        assert(s);

        if (UNIT_VTABLE(u)->following_set)
                return UNIT_VTABLE(u)->following_set(u, s);

        *s = NULL;
        return 0;
}

Project: systemd
File: unit.c

int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) {
        assert(u);
        assert(w >= 0 && w < _KILL_WHO_MAX);
        assert(signo > 0);
        assert(signo < _NSIG);

        if (!UNIT_VTABLE(u)->kill)
                return -ENOTSUP;

        return UNIT_VTABLE(u)->kill(u, w, signo, error);
}

Project: systemd
File: unit.c

static void unit_status_print_starting_stopping(Unit *u, JobType t) {
        const char *format;

        assert(u);

        /* We only print status messages for selected units on
         * selected operations. */

        format = unit_get_status_message_format(u, t);
        if (!format)
                return;

        unit_status_printf(u, "", format);
}

Project: systemd
File: unit.c

int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name) {
        _cleanup_free_ char *p = NULL, *q = NULL;
        int r;

        assert(u);

        if (!(mode & (UNIT_PERSISTENT|UNIT_RUNTIME)))
                return 0;

        r = drop_in_file(u, mode, name, &p, &q);
        if (r < 0)
                return r;

        if (unlink(q) < 0)
                r = errno == ENOENT ? 0 : -errno;
        else
                r = 1;

        rmdir(p);
        return r;
}

Project: systemd
File: unit.c

bool unit_can_serialize(Unit *u) {
        assert(u);

        return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item;
}

Project: systemd
File: manager.c

static void trim_generator_dir(Manager *m, char **generator) {
        assert(m);
        assert(generator);

        if (!*generator)
                return;

        if (rmdir(*generator) >= 0) {
                free(*generator);
                *generator = NULL;
        }

        return;
}

Project: systemd
File: manager.c

int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root) {
        Iterator i;
        Unit *u;
        const char *t;
        char **e;
        int r;

        assert(m);
        assert(f);
        assert(fds);

        m->n_reloading ++;

        fprintf(f, "current-job-id=%i\n", m->current_job_id);
        fprintf(f, "taint-usr=%s\n", yes_no(m->taint_usr));
        fprintf(f, "n-installed-jobs=%u\n", m->n_installed_jobs);
        fprintf(f, "n-failed-jobs=%u\n", m->n_failed_jobs);

        dual_timestamp_serialize(f, "firmware-timestamp", &m->firmware_timestamp);
        dual_timestamp_serialize(f, "loader-timestamp", &m->loader_timestamp);
        dual_timestamp_serialize(f, "kernel-timestamp", &m->kernel_timestamp);
        dual_timestamp_serialize(f, "initrd-timestamp", &m->initrd_timestamp);

        if (!in_initrd()) {
                dual_timestamp_serialize(f, "userspace-timestamp", &m->userspace_timestamp);
                dual_timestamp_serialize(f, "finish-timestamp", &m->finish_timestamp);
                dual_timestamp_serialize(f, "security-start-timestamp", &m->security_start_timestamp);
                dual_timestamp_serialize(f, "security-finish-timestamp", &m->security_finish_timestamp);
                dual_timestamp_serialize(f, "generators-start-timestamp", &m->generators_start_timestamp);
                dual_timestamp_serialize(f, "generators-finish-timestamp", &m->generators_finish_timestamp);
                dual_timestamp_serialize(f, "units-load-start-timestamp", &m->units_load_start_timestamp);
                dual_timestamp_serialize(f, "units-load-finish-timestamp", &m->units_load_finish_timestamp);
        }

        if (!switching_root) {
                STRV_FOREACH(e, m->environment) {
                        _cleanup_free_ char *ce;

                        ce = cescape(*e);
                        if (!ce)
                                return -ENOMEM;

                        fprintf(f, "env=%s\n", *e);
                }
        }

        if (m->notify_fd >= 0) {
                int copy;

                copy = fdset_put_dup(fds, m->notify_fd);
                if (copy < 0)
                        return copy;

                fprintf(f, "notify-fd=%i\n", copy);
                fprintf(f, "notify-socket=%s\n", m->notify_socket);
        }

        if (m->kdbus_fd >= 0) {
                int copy;

                copy = fdset_put_dup(fds, m->kdbus_fd);
                if (copy < 0)
                        return copy;

                fprintf(f, "kdbus-fd=%i\n", copy);
        }

        bus_serialize(m, f);

        fputc('\n', f);

        HASHMAP_FOREACH_KEY(u, t, m->units, i) {
                if (u->id != t)
                        continue;

                if (!unit_can_serialize(u))
                        continue;

                /* Start marker */
                fputs(u->id, f);
                fputc('\n', f);

                r = unit_serialize(u, f, fds, !switching_root);
                if (r < 0) {
                        m->n_reloading --;
                        return r;
                }
        }

        assert(m->n_reloading > 0);
        m->n_reloading --;

        if (ferror(f))
                return -EIO;

        r = bus_fdset_add_all(m, fds);
        if (r < 0)
                return r;

        return 0;
}

Project: systemd
File: unit.c

int unit_load_fragment_and_dropin(Unit *u) {
        int r;

        assert(u);

        /* Load a .{service,socket,...} file */
        r = unit_load_fragment(u);
        if (r < 0)
                return r;

        if (u->load_state == UNIT_STUB)
                return -ENOENT;

        /* Load drop-in directory data */
        r = unit_load_dropin(unit_follow_merge(u));
        if (r < 0)
                return r;

        return 0;
}

Project: systemd
File: unit.c

void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) {
        assert(u);
        assert(f);
        assert(key);
        assert(value);

        fprintf(f, "%s=%s\n", key, value);
}

Project: systemd
File: manager.c

int manager_new(SystemdRunningAs running_as, Manager **_m) {
        Manager *m;
        int r;

        assert(_m);
        assert(running_as >= 0);
        assert(running_as < _SYSTEMD_RUNNING_AS_MAX);

        m = new0(Manager, 1);
        if (!m)
                return -ENOMEM;

#ifdef ENABLE_EFI
        if (detect_container(NULL) <= 0)
                boot_timestamps(&m->userspace_timestamp, &m->firmware_timestamp, &m->loader_timestamp);
#endif

        m->running_as = running_as;
        m->exit_code = _MANAGER_EXIT_CODE_INVALID;

        m->idle_pipe[0] = m->idle_pipe[1] = m->idle_pipe[2] = m->idle_pipe[3] = -1;

        m->pin_cgroupfs_fd = m->notify_fd = m->signal_fd = m->time_change_fd = m->dev_autofs_fd = m->private_listen_fd = m->kdbus_fd = -1;
        m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */

        r = manager_default_environment(m);
        if (r < 0)
                goto fail;

        r = hashmap_ensure_allocated(&m->units, string_hash_func, string_compare_func);
        if (r < 0)
                goto fail;

        r = hashmap_ensure_allocated(&m->jobs, trivial_hash_func, trivial_compare_func);
        if (r < 0)
                goto fail;

        r = hashmap_ensure_allocated(&m->cgroup_unit, string_hash_func, string_compare_func);
        if (r < 0)
                goto fail;

        r = hashmap_ensure_allocated(&m->watch_bus, string_hash_func, string_compare_func);
        if (r < 0)
                goto fail;

        r = sd_event_default(&m->event);
        if (r < 0)
                goto fail;

        r = sd_event_add_defer(m->event, manager_dispatch_run_queue, m, &m->run_queue_event_source);
        if (r < 0)
                goto fail;

        r = sd_event_source_set_priority(m->run_queue_event_source, SD_EVENT_PRIORITY_IDLE);
        if (r < 0)
                goto fail;

        r = sd_event_source_set_enabled(m->run_queue_event_source, SD_EVENT_OFF);
        if (r < 0)
                goto fail;

        r = manager_setup_signals(m);
        if (r < 0)
                goto fail;

        r = manager_setup_cgroup(m);
        if (r < 0)
                goto fail;

        r = manager_setup_time_change(m);
        if (r < 0)
                goto fail;

        m->udev = udev_new();
        if (!m->udev) {
                r = -ENOMEM;
                goto fail;
        }

        /* Note that we set up neither kdbus, nor the notify fd
         * here. We do that after deserialization, since they might
         * have gotten serialized across the reexec. */

        m->taint_usr = dir_is_empty("/usr") > 0;

        *_m = m;
        return 0;

fail:
        manager_free(m);
        return r;
}

Project: systemd
File: unit.c

int unit_merge(Unit *u, Unit *other) {
        UnitDependency d;

        assert(u);
        assert(other);
        assert(u->manager == other->manager);
        assert(u->type != _UNIT_TYPE_INVALID);

        other = unit_follow_merge(other);

        if (other == u)
                return 0;

        if (u->type != other->type)
                return -EINVAL;

        if (!u->instance != !other->instance)
                return -EINVAL;

        if (other->load_state != UNIT_STUB &&
            other->load_state != UNIT_NOT_FOUND)
                return -EEXIST;

        if (other->job)
                return -EEXIST;

        if (other->nop_job)
                return -EEXIST;

        if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other)))
                return -EEXIST;

        /* Merge names */
        merge_names(u, other);

        /* Redirect all references */
        while (other->refs)
                unit_ref_set(other->refs, u);

        /* Merge dependencies */
        for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
                merge_dependencies(u, other, d);

        other->load_state = UNIT_MERGED;
        other->merged_into = u;

        /* If there is still some data attached to the other node, we
         * don't need it anymore, and can free it. */
        if (other->load_state != UNIT_STUB)
                if (UNIT_VTABLE(other)->done)
                        UNIT_VTABLE(other)->done(other);

        unit_add_to_dbus_queue(u);
        unit_add_to_cleanup_queue(other);

        return 0;
}

Project: systemd
File: unit.c

static int unit_add_default_dependencies(Unit *u) {

        static const UnitDependency deps[] = {
                UNIT_REQUIRED_BY,
                UNIT_REQUIRED_BY_OVERRIDABLE,
                UNIT_WANTED_BY,
                UNIT_BOUND_BY
        };

        Unit *target;
        Iterator i;
        int r;
        unsigned k;

        assert(u);

        for (k = 0; k < ELEMENTSOF(deps); k++)
                SET_FOREACH(target, u->dependencies[deps[k]], i) {
                        r = unit_add_default_target_dependency(u, target);
                        if (r < 0)
                                return r;
                }

        if (u->default_dependencies && unit_get_cgroup_context(u)) {
                if (UNIT_ISSET(u->slice))
                        r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true);
                else
                        r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, SPECIAL_ROOT_SLICE, NULL, true);

                if (r < 0)
                        return r;
        }

        return 0;
}

Project: systemd
File: unit.c

int unit_kill_context(
                Unit *u,
                KillContext *c,
                bool sigkill,
                pid_t main_pid,
                pid_t control_pid,
                bool main_pid_alien) {

        int sig, wait_for_exit = false, r;

        assert(u);
        assert(c);

        if (c->kill_mode == KILL_NONE)
                return 0;

        sig = sigkill ? SIGKILL : c->kill_signal;

        if (main_pid > 0) {
                r = kill_and_sigcont(main_pid, sig);

                if (r < 0 && r != -ESRCH) {
                        _cleanup_free_ char *comm = NULL;
                        get_process_comm(main_pid, &comm);

                        log_warning_unit(u->id, "Failed to kill main process " PID_FMT " (%s): %s", main_pid, strna(comm), strerror(-r));
                } else {
                        if (!main_pid_alien)
                                wait_for_exit = true;

                        if (c->send_sighup && !sigkill)
                                kill(main_pid, SIGHUP);
                }
        }

        if (control_pid > 0) {
                r = kill_and_sigcont(control_pid, sig);

                if (r < 0 && r != -ESRCH) {
                        _cleanup_free_ char *comm = NULL;
                        get_process_comm(control_pid, &comm);

                        log_warning_unit(u->id, "Failed to kill control process " PID_FMT " (%s): %s", control_pid, strna(comm), strerror(-r));
                } else {
                        wait_for_exit = true;

                        if (c->send_sighup && !sigkill)
                                kill(control_pid, SIGHUP);
                }
        }

        if ((c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && sigkill)) && u->cgroup_path) {
                _cleanup_set_free_ Set *pid_set = NULL;

                /* Exclude the main/control pids from being killed via the cgroup */
                pid_set = unit_pid_set(main_pid, control_pid);
                if (!pid_set)
                        return -ENOMEM;

                r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, true, false, pid_set);
                if (r < 0) {
                        if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
                                log_warning_unit(u->id, "Failed to kill control group: %s", strerror(-r));
                } else if (r > 0) {

                        wait_for_exit = true;

                        if (c->send_sighup && !sigkill) {
                                set_free(pid_set);

                                pid_set = unit_pid_set(main_pid, control_pid);
                                if (!pid_set)
                                        return -ENOMEM;

                                cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, SIGHUP, false, true, false, pid_set);
                        }
                }
        }

        return wait_for_exit;
}

Project: systemd
File: unit.c

int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) {
        Unit *other;
        int r;
        _cleanup_free_ char *s = NULL;

        assert(u);
        assert(name || path);

        if (!(name = resolve_template(u, name, path, &s)))
                return -ENOMEM;

        if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0)
                return r;

        r = unit_add_dependency(other, d, u, add_reference);

        return r;
}

Project: systemd
File: unit.c

int unit_add_default_slice(Unit *u) {
        _cleanup_free_ char *b = NULL;
        const char *slice_name;
        Unit *slice;
        int r;

        assert(u);

        if (UNIT_ISSET(u->slice))
                return 0;

        if (!unit_get_cgroup_context(u))
                return 0;

        if (u->instance) {
                _cleanup_free_ char *prefix = NULL, *escaped = NULL;

                /* Implicitly place all instantiated units in their
                 * own per-template slice */

                prefix = unit_name_to_prefix(u->id);
                if (!prefix)
                        return -ENOMEM;

                /* The prefix is already escaped, but it might include
                 * "-" which has a special meaning for slice units,
                 * hence escape it here extra. */
                escaped = strreplace(prefix, "-", "\\x2d");
                if (!escaped)
                        return -ENOMEM;

                if (u->manager->running_as == SYSTEMD_SYSTEM)
                        b = strjoin("system-", escaped, ".slice", NULL);
                else
                        b = strappend(escaped, ".slice");
                if (!b)
                        return -ENOMEM;

                slice_name = b;
        } else
                slice_name =
                        u->manager->running_as == SYSTEMD_SYSTEM
                        ? SPECIAL_SYSTEM_SLICE
                        : SPECIAL_ROOT_SLICE;

        r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice);
        if (r < 0)
                return r;

        unit_ref_set(&u->slice, slice);
        return 0;
}

Project: systemd
File: manager.c

static int manager_setup_time_change(Manager *m) {
        int r;

        /* We only care for the cancellation event, hence we set the
         * timeout to the latest possible value. */
        struct itimerspec its = {
                .it_value.tv_sec = TIME_T_MAX,
        };

        assert(m);
        assert_cc(sizeof(time_t) == sizeof(TIME_T_MAX));

        /* Uses TFD_TIMER_CANCEL_ON_SET to get notifications whenever
         * CLOCK_REALTIME makes a jump relative to CLOCK_MONOTONIC */

        m->time_change_fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK|TFD_CLOEXEC);
        if (m->time_change_fd < 0) {
                log_error("Failed to create timerfd: %m");
                return -errno;
        }

        if (timerfd_settime(m->time_change_fd, TFD_TIMER_ABSTIME|TFD_TIMER_CANCEL_ON_SET, &its, NULL) < 0) {
                log_debug("Failed to set up TFD_TIMER_CANCEL_ON_SET, ignoring: %m");
                close_nointr_nofail(m->time_change_fd);
                m->time_change_fd = -1;
                return 0;
        }

        r = sd_event_add_io(m->event, m->time_change_fd, EPOLLIN, manager_dispatch_time_change_fd, m, &m->time_change_event_source);
        if (r < 0) {
                log_error("Failed to create time change event source: %s", strerror(-r));
                return r;
        }

        log_debug("Set up TFD_TIMER_CANCEL_ON_SET timerfd.");

        return 0;
}

Project: systemd
File: unit.c

Unit *unit_following(Unit *u) {
        assert(u);

        if (UNIT_VTABLE(u)->following)
                return UNIT_VTABLE(u)->following(u);

        return NULL;
}

Project: systemd
File: manager.c

static void manager_close_idle_pipe(Manager *m) {
        assert(m);

        close_pipe(m->idle_pipe);
        close_pipe(m->idle_pipe + 2);
}

Project: systemd
File: unit.c

bool unit_job_is_applicable(Unit *u, JobType j) {
        assert(u);
        assert(j >= 0 && j < _JOB_TYPE_MAX);

        switch (j) {

        case JOB_VERIFY_ACTIVE:
        case JOB_START:
        case JOB_STOP:
        case JOB_NOP:
                return true;

        case JOB_RESTART:
        case JOB_TRY_RESTART:
                return unit_can_start(u);

        case JOB_RELOAD:
                return unit_can_reload(u);

        case JOB_RELOAD_OR_START:
                return unit_can_reload(u) && unit_can_start(u);

        default:
                assert_not_reached("Invalid job type");
        }
}

Project: systemd
File: unit.c

static int unit_add_mount_links(Unit *u) {
        char **i;
        int r;

        assert(u);

        STRV_FOREACH(i, u->requires_mounts_for) {
                char prefix[strlen(*i) + 1];

                PATH_FOREACH_PREFIX_MORE(prefix, *i) {
                        Unit *m;

                        r = manager_get_unit_by_path(u->manager, prefix, ".mount", &m);
                        if (r < 0)
                                return r;
                        if (r == 0)
                                continue;
                        if (m == u)
                                continue;

                        if (m->load_state != UNIT_LOADED)
                                continue;

                        r = unit_add_dependency(u, UNIT_AFTER, m, true);
                        if (r < 0)
                                return r;

                        if (m->fragment_path) {
                                r = unit_add_dependency(u, UNIT_REQUIRES, m, true);
                                if (r < 0)
                                        return r;
                        }
                }
        }

        return 0;
}

Project: systemd
File: manager.c

void manager_dispatch_bus_name_owner_changed(
                Manager *m,
                const char *name,
                const char* old_owner,
                const char *new_owner) {

        Unit *u;

        assert(m);
        assert(name);

        u = hashmap_get(m->watch_bus, name);
        if (!u)
                return;

        UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner);
}

Project: systemd
File: manager.c

int manager_enumerate(Manager *m) {
        int r = 0, q;
        UnitType c;

        assert(m);

        /* Let's ask every type to load all units from disk/kernel
         * that it might know */
        for (c = 0; c < _UNIT_TYPE_MAX; c++)
                if (unit_vtable[c]->enumerate) {
                        q = unit_vtable[c]->enumerate(m);
                        if (q < 0)
                                r = q;
                }

        manager_dispatch_load_queue(m);
        return r;
}

Project: systemd
File: manager.c

static int manager_dispatch_time_change_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
        Manager *m = userdata;
        Iterator i;
        Unit *u;

        assert(m);
        assert(m->time_change_fd == fd);

        log_struct(LOG_INFO,
                   MESSAGE_ID(SD_MESSAGE_TIME_CHANGE),
                   "MESSAGE=Time has been changed",
                   NULL);

        /* Restart the watch */
        m->time_change_event_source = sd_event_source_unref(m->time_change_event_source);

        close_nointr_nofail(m->time_change_fd);
        m->time_change_fd = -1;

        manager_setup_time_change(m);

        HASHMAP_FOREACH(u, m->units, i)
                if (UNIT_VTABLE(u)->time_change)
                        UNIT_VTABLE(u)->time_change(u);

        return 0;
}

Project: systemd
File: unit.c

const char *unit_description(Unit *u) {
        assert(u);

        if (u->description)
                return u->description;

        return strna(u->id);
}

Project: systemd
File: manager.c

static void draw_cylon(char buffer[], size_t buflen, unsigned width, unsigned pos) {
        char *p = buffer;

        assert(buflen >= CYLON_BUFFER_EXTRA + width + 1);
        assert(pos <= width+1); /* 0 or width+1 mean that the center light is behind the corner */

        if (pos > 1) {
                if (pos > 2)
                        p = mempset(p, ' ', pos-2);
                p = stpcpy(p, ANSI_RED_ON);
                *p++ = '*';
        }

        if (pos > 0 && pos <= width) {
                p = stpcpy(p, ANSI_HIGHLIGHT_RED_ON);
                *p++ = '*';
        }

        p = stpcpy(p, ANSI_HIGHLIGHT_OFF);

        if (pos < width) {
                p = stpcpy(p, ANSI_RED_ON);
                *p++ = '*';
                if (pos < width-1)
                        p = mempset(p, ' ', width-1-pos);
                strcpy(p, ANSI_HIGHLIGHT_OFF);
        }
}

Project: systemd
File: manager.c

bool manager_is_reloading_or_reexecuting(Manager *m) {
        assert(m);

        return m->n_reloading != 0;
}

Project: systemd
File: unit.c

void unit_unwatch_all_pids(Unit *u) {
        Iterator i;
        void *e;

        assert(u);

        SET_FOREACH(e, u->pids, i) {
                hashmap_remove_value(u->manager->watch_pids1, e, u);
                hashmap_remove_value(u->manager->watch_pids2, e, u);
        }

        set_free(u->pids);
        u->pids = NULL;
}

Project: systemd
File: manager.c

static int manager_watch_idle_pipe(Manager *m) {
        int r;

        assert(m);

        if (m->idle_pipe_event_source)
                return 0;

        if (m->idle_pipe[2] < 0)
                return 0;

        r = sd_event_add_io(m->event, m->idle_pipe[2], EPOLLIN, manager_dispatch_idle_pipe_fd, m, &m->idle_pipe_event_source);
        if (r < 0) {
                log_error("Failed to watch idle pipe: %s", strerror(-r));
                return r;
        }

        return 0;
}

Project: systemd
File: manager.c

static int manager_dispatch_signal_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
        Manager *m = userdata;
        ssize_t n;
        struct signalfd_siginfo sfsi;
        bool sigchld = false;

        assert(m);
        assert(m->signal_fd == fd);

        if (revents != EPOLLIN) {
                log_warning("Got unexpected events from signal file descriptor.");
                return 0;
        }

        for (;;) {
                n = read(m->signal_fd, &sfsi, sizeof(sfsi));
                if (n != sizeof(sfsi)) {

                        if (n >= 0)
                                return -EIO;

                        if (errno == EINTR || errno == EAGAIN)
                                break;

                        return -errno;
                }

                if (sfsi.ssi_pid > 0) {
                        _cleanup_free_ char *p = NULL;

                        get_process_comm(sfsi.ssi_pid, &p);

                        log_full(sfsi.ssi_signo == SIGCHLD ||
                                 (sfsi.ssi_signo == SIGTERM && m->running_as == SYSTEMD_USER)
                                 ? LOG_DEBUG : LOG_INFO,
                                 "Received SIG%s from PID "PID_FMT" (%s).",
                                 signal_to_string(sfsi.ssi_signo),
                                 sfsi.ssi_pid, strna(p));
                } else
                        log_full(sfsi.ssi_signo == SIGCHLD ||
                                 (sfsi.ssi_signo == SIGTERM && m->running_as == SYSTEMD_USER)
                                 ? LOG_DEBUG : LOG_INFO,
                                 "Received SIG%s.",
                                 signal_to_string(sfsi.ssi_signo));

                switch (sfsi.ssi_signo) {

                case SIGCHLD:
                        sigchld = true;
                        break;

                case SIGTERM:
                        if (m->running_as == SYSTEMD_SYSTEM) {
                                /* This is for compatibility with the
                                 * original sysvinit */
                                m->exit_code = MANAGER_REEXECUTE;
                                break;
                        }

                        /* Fall through */

                case SIGINT:
                        if (m->running_as == SYSTEMD_SYSTEM) {
                                manager_start_target(m, SPECIAL_CTRL_ALT_DEL_TARGET, JOB_REPLACE_IRREVERSIBLY);
                                break;
                        }

                        /* Run the exit target if there is one, if not, just exit. */
                        if (manager_start_target(m, SPECIAL_EXIT_TARGET, JOB_REPLACE) < 0) {
                                m->exit_code = MANAGER_EXIT;
                                return 0;
                        }

                        break;

                case SIGWINCH:
                        if (m->running_as == SYSTEMD_SYSTEM)
                                manager_start_target(m, SPECIAL_KBREQUEST_TARGET, JOB_REPLACE);

                        /* This is a nop on non-init */
                        break;

                case SIGPWR:
                        if (m->running_as == SYSTEMD_SYSTEM)
                                manager_start_target(m, SPECIAL_SIGPWR_TARGET, JOB_REPLACE);

                        /* This is a nop on non-init */
                        break;

                case SIGUSR1: {
                        Unit *u;

                        u = manager_get_unit(m, SPECIAL_DBUS_SERVICE);

                        if (!u || UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) {
                                log_info("Trying to reconnect to bus...");
                                bus_init(m, true);
                        }

                        if (!u || !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) {
                                log_info("Loading D-Bus service...");
                                manager_start_target(m, SPECIAL_DBUS_SERVICE, JOB_REPLACE);
                        }

                        break;
                }

                case SIGUSR2: {
                        _cleanup_free_ char *dump = NULL;
                        _cleanup_fclose_ FILE *f = NULL;
                        size_t size;

                        f = open_memstream(&dump, &size);
                        if (!f) {
                                log_warning("Failed to allocate memory stream.");
                                break;
                        }

                        manager_dump_units(m, f, "\t");
                        manager_dump_jobs(m, f, "\t");

                        if (ferror(f)) {
                                log_warning("Failed to write status stream");
                                break;
                        }

                        log_dump(LOG_INFO, dump);
                        break;
                }

                case SIGHUP:
                        m->exit_code = MANAGER_RELOAD;
                        break;

                default: {

                        /* Starting SIGRTMIN+0 */
                        static const char * const target_table[] = {
                                [0] = SPECIAL_DEFAULT_TARGET,
                                [1] = SPECIAL_RESCUE_TARGET,
                                [2] = SPECIAL_EMERGENCY_TARGET,
                                [3] = SPECIAL_HALT_TARGET,
                                [4] = SPECIAL_POWEROFF_TARGET,
                                [5] = SPECIAL_REBOOT_TARGET,
                                [6] = SPECIAL_KEXEC_TARGET
                        };

                        /* Starting SIGRTMIN+13, so that target halt and system halt are 10 apart */
                        static const ManagerExitCode code_table[] = {
                                [0] = MANAGER_HALT,
                                [1] = MANAGER_POWEROFF,
                                [2] = MANAGER_REBOOT,
                                [3] = MANAGER_KEXEC
                        };

                        if ((int) sfsi.ssi_signo >= SIGRTMIN+0 &&
                            (int) sfsi.ssi_signo < SIGRTMIN+(int) ELEMENTSOF(target_table)) {
                                int idx = (int) sfsi.ssi_signo - SIGRTMIN;
                                manager_start_target(m, target_table[idx],
                                                     (idx == 1 || idx == 2) ? JOB_ISOLATE : JOB_REPLACE);
                                break;
                        }

                        if ((int) sfsi.ssi_signo >= SIGRTMIN+13 &&
                            (int) sfsi.ssi_signo < SIGRTMIN+13+(int) ELEMENTSOF(code_table)) {
                                m->exit_code = code_table[sfsi.ssi_signo - SIGRTMIN - 13];
                                break;
                        }

                        switch (sfsi.ssi_signo - SIGRTMIN) {

                        case 20:
                                log_debug("Enabling showing of status.");
                                manager_set_show_status(m, SHOW_STATUS_YES);
                                break;

                        case 21:
                                log_debug("Disabling showing of status.");
                                manager_set_show_status(m, SHOW_STATUS_NO);
                                break;

                        case 22:
                                log_set_max_level(LOG_DEBUG);
                                log_notice("Setting log level to debug.");
                                break;

                        case 23:
                                log_set_max_level(LOG_INFO);
                                log_notice("Setting log level to info.");
                                break;

                        case 24:
                                if (m->running_as == SYSTEMD_USER) {
                                        m->exit_code = MANAGER_EXIT;
                                        return 0;
                                }

                                /* This is a nop on init */
                                break;

                        case 26:
                                log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
                                log_notice("Setting log target to journal-or-kmsg.");
                                break;

                        case 27:
                                log_set_target(LOG_TARGET_CONSOLE);
                                log_notice("Setting log target to console.");
                                break;

                        case 28:
                                log_set_target(LOG_TARGET_KMSG);
                                log_notice("Setting log target to kmsg.");
                                break;

                        case 29:
                                log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
                                log_notice("Setting log target to syslog-or-kmsg.");
                                break;

                        default:
                                log_warning("Got unhandled signal <%s>.", signal_to_string(sfsi.ssi_signo));
                        }
                }
                }
        }

        if (sigchld)
                manager_dispatch_sigchld(m);

        return 0;
}

Project: systemd
File: manager.c

static int manager_start_target(Manager *m, const char *name, JobMode mode) {
        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
        int r;

        log_debug_unit(name, "Activating special unit %s", name);

        r = manager_add_job_by_name(m, JOB_START, name, mode, true, &error, NULL);
        if (r < 0)
                log_error_unit(name, "Failed to enqueue %s job: %s", name, bus_error_message(&error, r));

        return r;
}

Project: systemd
File: unit.c

static void unit_free_requires_mounts_for(Unit *u) {
        char **j;

        STRV_FOREACH(j, u->requires_mounts_for) {
                char s[strlen(*j) + 1];

                PATH_FOREACH_PREFIX_MORE(s, *j) {
                        char *y;
                        Set *x;

                        x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y);
                        if (!x)
                                continue;

                        set_remove(x, u);

                        if (set_isempty(x)) {
                                hashmap_remove(u->manager->units_requiring_mounts_for, y);
                                free(y);
                                set_free(x);
                        }
                }
        }

        strv_free(u->requires_mounts_for);
        u->requires_mounts_for = NULL;
}

Project: systemd
File: unit.c

void unit_dump(Unit *u, FILE *f, const char *prefix) {
        char *t, **j;
        UnitDependency d;
        Iterator i;
        _cleanup_free_ char *p2 = NULL;
        const char *prefix2;
        char
                timestamp1[FORMAT_TIMESTAMP_MAX],
                timestamp2[FORMAT_TIMESTAMP_MAX],
                timestamp3[FORMAT_TIMESTAMP_MAX],
                timestamp4[FORMAT_TIMESTAMP_MAX],
                timespan[FORMAT_TIMESPAN_MAX];
        Unit *following;
        _cleanup_set_free_ Set *following_set = NULL;
        int r;

        assert(u);
        assert(u->type >= 0);

        if (!prefix)
                prefix = "";
        p2 = strappend(prefix, "\t");
        prefix2 = p2 ? p2 : prefix;

        fprintf(f,
                "%s-> Unit %s:\n"
                "%s\tDescription: %s\n"
                "%s\tInstance: %s\n"
                "%s\tUnit Load State: %s\n"
                "%s\tUnit Active State: %s\n"
                "%s\tInactive Exit Timestamp: %s\n"
                "%s\tActive Enter Timestamp: %s\n"
                "%s\tActive Exit Timestamp: %s\n"
                "%s\tInactive Enter Timestamp: %s\n"
                "%s\tGC Check Good: %s\n"
                "%s\tNeed Daemon Reload: %s\n"
                "%s\tTransient: %s\n"
                "%s\tSlice: %s\n"
                "%s\tCGroup: %s\n"
                "%s\tCGroup realized: %s\n"
                "%s\tCGroup mask: 0x%x\n"
                "%s\tCGroup members mask: 0x%x\n",
                prefix, u->id,
                prefix, unit_description(u),
                prefix, strna(u->instance),
                prefix, unit_load_state_to_string(u->load_state),
                prefix, unit_active_state_to_string(unit_active_state(u)),
                prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)),
                prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)),
                prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)),
                prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)),
                prefix, yes_no(unit_check_gc(u)),
                prefix, yes_no(unit_need_daemon_reload(u)),
                prefix, yes_no(u->transient),
                prefix, strna(unit_slice_name(u)),
                prefix, strna(u->cgroup_path),
                prefix, yes_no(u->cgroup_realized),
                prefix, u->cgroup_mask,
                prefix, u->cgroup_members_mask);

        SET_FOREACH(t, u->names, i)
                fprintf(f, "%s\tName: %s\n", prefix, t);

        STRV_FOREACH(j, u->documentation)
                fprintf(f, "%s\tDocumentation: %s\n", prefix, *j);

        following = unit_following(u);
        if (following)
                fprintf(f, "%s\tFollowing: %s\n", prefix, following->id);

        r = unit_following_set(u, &following_set);
        if (r >= 0) {
                Unit *other;

                SET_FOREACH(other, following_set, i)
                        fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id);
        }

        if (u->fragment_path)
                fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path);

        if (u->source_path)
                fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path);

        STRV_FOREACH(j, u->dropin_paths)
                fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j);

        if (u->job_timeout > 0)
                fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0));

        condition_dump_list(u->conditions, f, prefix);

        if (dual_timestamp_is_set(&u->condition_timestamp))
                fprintf(f,
                        "%s\tCondition Timestamp: %s\n"
                        "%s\tCondition Result: %s\n",
                        prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)),
                        prefix, yes_no(u->condition_result));

        for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) {
                Unit *other;

                SET_FOREACH(other, u->dependencies[d], i)
                        fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id);
        }

        if (!strv_isempty(u->requires_mounts_for)) {
                fprintf(f,
                        "%s\tRequiresMountsFor:", prefix);

                STRV_FOREACH(j, u->requires_mounts_for)
                        fprintf(f, " %s", *j);

                fputs("\n", f);
        }

        if (u->load_state == UNIT_LOADED) {

                fprintf(f,
                        "%s\tStopWhenUnneeded: %s\n"
                        "%s\tRefuseManualStart: %s\n"
                        "%s\tRefuseManualStop: %s\n"
                        "%s\tDefaultDependencies: %s\n"
                        "%s\tOnFailureJobMode: %s\n"
                        "%s\tIgnoreOnIsolate: %s\n"
                        "%s\tIgnoreOnSnapshot: %s\n",
                        prefix, yes_no(u->stop_when_unneeded),
                        prefix, yes_no(u->refuse_manual_start),
                        prefix, yes_no(u->refuse_manual_stop),
                        prefix, yes_no(u->default_dependencies),
                        prefix, job_mode_to_string(u->on_failure_job_mode),
                        prefix, yes_no(u->ignore_on_isolate),
                        prefix, yes_no(u->ignore_on_snapshot));

                if (UNIT_VTABLE(u)->dump)
                        UNIT_VTABLE(u)->dump(u, f, prefix2);

        } else if (u->load_state == UNIT_MERGED)
                fprintf(f,
                        "%s\tMerged into: %s\n",
                        prefix, u->merged_into->id);
        else if (u->load_state == UNIT_ERROR)
                fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error));


        if (u->job)
                job_dump(u->job, f, prefix2);

        if (u->nop_job)
                job_dump(u->nop_job, f, prefix2);

}

Project: systemd
File: manager.c

static unsigned manager_dispatch_gc_queue(Manager *m) {
        Unit *u;
        unsigned n = 0;
        unsigned gc_marker;

        assert(m);

        /* log_debug("Running GC..."); */

        m->gc_marker += _GC_OFFSET_MAX;
        if (m->gc_marker + _GC_OFFSET_MAX <= _GC_OFFSET_MAX)
                m->gc_marker = 1;

        gc_marker = m->gc_marker;

        while ((u = m->gc_queue)) {
                assert(u->in_gc_queue);

                unit_gc_sweep(u, gc_marker);

                LIST_REMOVE(gc_queue, m->gc_queue, u);
                u->in_gc_queue = false;

                n++;

                if (u->gc_marker == gc_marker + GC_OFFSET_BAD ||
                    u->gc_marker == gc_marker + GC_OFFSET_UNSURE) {
                        log_debug_unit(u->id, "Collecting %s", u->id);
                        u->gc_marker = gc_marker + GC_OFFSET_BAD;
                        unit_add_to_cleanup_queue(u);
                }
        }

        m->n_in_gc_queue = 0;

        return n;
}

Project: systemd
File: manager.c

static void manager_invoke_notify_message(Manager *m, Unit *u, pid_t pid, char *buf, size_t n) {
        _cleanup_strv_free_ char **tags = NULL;

        assert(m);
        assert(u);
        assert(buf);
        assert(n > 0);

        tags = strv_split(buf, "\n\r");
        if (!tags) {
                log_oom();
                return;
        }

        log_debug_unit(u->id, "Got notification message for unit %s", u->id);

        if (UNIT_VTABLE(u)->notify_message)
                UNIT_VTABLE(u)->notify_message(u, pid, tags);
}

Project: systemd
File: manager.c

static void manager_clean_environment(Manager *m) {
        assert(m);

        /* Let's remove some environment variables that we
         * need ourselves to communicate with our clients */
        strv_env_unset_many(
                        m->environment,
                        "NOTIFY_SOCKET",
                        "MAINPID",
                        "MANAGERPID",
                        "LISTEN_PID",
                        "LISTEN_FDS",
                        "WATCHDOG_PID",
                        "WATCHDOG_USEC",
                        NULL);
}

Project: systemd
File: manager.c

int manager_startup(Manager *m, FILE *serialization, FDSet *fds) {
        int r, q;

        assert(m);

        dual_timestamp_get(&m->generators_start_timestamp);
        manager_run_generators(m);
        dual_timestamp_get(&m->generators_finish_timestamp);

        r = lookup_paths_init(
                        &m->lookup_paths, m->running_as, true,
                        m->generator_unit_path,
                        m->generator_unit_path_early,
                        m->generator_unit_path_late);
        if (r < 0)
                return r;

        manager_build_unit_path_cache(m);

        /* If we will deserialize make sure that during enumeration
         * this is already known, so we increase the counter here
         * already */
        if (serialization)
                m->n_reloading ++;

        /* First, enumerate what we can from all config files */
        dual_timestamp_get(&m->units_load_start_timestamp);
        r = manager_enumerate(m);
        dual_timestamp_get(&m->units_load_finish_timestamp);

        /* Second, deserialize if there is something to deserialize */
        if (serialization) {
                q = manager_deserialize(m, serialization, fds);
                if (q < 0)
                        r = q;
        }

        /* Any fds left? Find some unit which wants them. This is
         * useful to allow container managers to pass some file
         * descriptors to us pre-initialized. This enables
         * socket-based activation of entire containers. */
        if (fdset_size(fds) > 0) {
                q = manager_distribute_fds(m, fds);
                if (q < 0)
                        r = q;
        }

        /* We might have deserialized the notify fd, but if we didn't
         * then let's create the bus now */
        manager_setup_notify(m);

        /* We might have deserialized the kdbus control fd, but if we
         * didn't, then let's create the bus now. */
        manager_setup_kdbus(m);
        manager_connect_bus(m, !!serialization);

        /* Third, fire things up! */
        q = manager_coldplug(m);
        if (q < 0)
                r = q;

        if (serialization) {
                assert(m->n_reloading > 0);
                m->n_reloading --;

                /* Let's wait for the UnitNew/JobNew messages being
                 * sent, before we notify that the reload is
                 * finished */
                m->send_reloading_done = true;
        }

        return r;
}

Project: systemd
File: unit.c

int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) {
        ExecRuntime *rt;
        int r;

        assert(u);
        assert(f);
        assert(fds);

        if (!unit_can_serialize(u))
                return 0;

        r = UNIT_VTABLE(u)->serialize(u, f, fds);
        if (r < 0)
                return r;

        rt = unit_get_exec_runtime(u);
        if (rt) {
                r = exec_runtime_serialize(rt, u, f, fds);
                if (r < 0)
                        return r;
        }

        dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp);
        dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp);
        dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp);
        dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp);
        dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp);

        if (dual_timestamp_is_set(&u->condition_timestamp))
                unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result));

        unit_serialize_item(u, f, "transient", yes_no(u->transient));

        if (u->cgroup_path)
                unit_serialize_item(u, f, "cgroup", u->cgroup_path);

        if (serialize_jobs) {
                if (u->job) {
                        fprintf(f, "job\n");
                        job_serialize(u->job, f, fds);
                }

                if (u->nop_job) {
                        fprintf(f, "job\n");
                        job_serialize(u->nop_job, f, fds);
                }
        }

        /* End marker */
        fputc('\n', f);
        return 0;
}

Project: systemd
File: unit.c

void unit_add_to_gc_queue(Unit *u) {
        assert(u);

        if (u->in_gc_queue || u->in_cleanup_queue)
                return;

        if (unit_check_gc(u))
                return;

        LIST_PREPEND(gc_queue, u->manager->gc_queue, u);
        u->in_gc_queue = true;

        u->manager->n_in_gc_queue ++;
}

Project: systemd
File: manager.c

static int enable_special_signals(Manager *m) {
        _cleanup_close_ int fd = -1;

        assert(m);

        /* Enable that we get SIGINT on control-alt-del. In containers
         * this will fail with EPERM (older) or EINVAL (newer), so
         * ignore that. */
        if (reboot(RB_DISABLE_CAD) < 0 && errno != EPERM && errno != EINVAL)
                log_warning("Failed to enable ctrl-alt-del handling: %m");

        fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
        if (fd < 0) {
                /* Support systems without virtual console */
                if (fd != -ENOENT)
                        log_warning("Failed to open /dev/tty0: %m");
        } else {
                /* Enable that we get SIGWINCH on kbrequest */
                if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0)
                        log_warning("Failed to enable kbrequest handling: %m");
        }

        return 0;
}

Project: systemd
File: manager.c

void manager_undo_generators(Manager *m) {
        assert(m);

        remove_generator_dir(m, &m->generator_unit_path);
        remove_generator_dir(m, &m->generator_unit_path_early);
        remove_generator_dir(m, &m->generator_unit_path_late);
}

Project: systemd
File: unit.c

int set_unit_path(const char *p) {
        _cleanup_free_ char *c = NULL;

        /* This is mostly for debug purposes */
        c = path_make_absolute_cwd(p);
        if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0)
                return -errno;

        return 0;
}

Project: systemd
File: manager.c

static int manager_watch_jobs_in_progress(Manager *m) {
        usec_t next;

        assert(m);

        if (m->jobs_in_progress_event_source)
                return 0;

        next = now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_WAIT_USEC;
        return sd_event_add_monotonic(m->event, next, 0, manager_dispatch_jobs_in_progress, m, &m->jobs_in_progress_event_source);
}

Project: systemd
File: unit.c

static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) {
        const char *format;
        char buf[LINE_MAX];
        sd_id128_t mid;

        assert(u);

        if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD)
                return;

        if (log_on_console())
                return;

        /* We log status messages for all units and all operations. */

        format = unit_get_status_message_format_try_harder(u, t);
        if (!format)
                return;

        snprintf(buf, sizeof(buf), format, unit_description(u));
        char_array_0(buf);

        mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING :
              t == JOB_STOP  ? SD_MESSAGE_UNIT_STOPPING :
                               SD_MESSAGE_UNIT_RELOADING;

        log_struct_unit(LOG_INFO,
                        u->id,
                        MESSAGE_ID(mid),
                        "MESSAGE=%s", buf,
                        NULL);
}

Project: systemd
File: manager.c

int manager_reload(Manager *m) {
        int r, q;
        _cleanup_fclose_ FILE *f = NULL;
        _cleanup_fdset_free_ FDSet *fds = NULL;

        assert(m);

        r = manager_open_serialization(m, &f);
        if (r < 0)
                return r;

        m->n_reloading ++;
        bus_manager_send_reloading(m, true);

        fds = fdset_new();
        if (!fds) {
                m->n_reloading --;
                return -ENOMEM;
        }

        r = manager_serialize(m, f, fds, false);
        if (r < 0) {
                m->n_reloading --;
                return r;
        }

        if (fseeko(f, 0, SEEK_SET) < 0) {
                m->n_reloading --;
                return -errno;
        }

        /* From here on there is no way back. */
        manager_clear_jobs_and_units(m);
        manager_undo_generators(m);
        lookup_paths_free(&m->lookup_paths);

        /* Find new unit paths */
        manager_run_generators(m);

        q = lookup_paths_init(
                        &m->lookup_paths, m->running_as, true,
                        m->generator_unit_path,
                        m->generator_unit_path_early,
                        m->generator_unit_path_late);
        if (q < 0)
                r = q;

        manager_build_unit_path_cache(m);

        /* First, enumerate what we can from all config files */
        q = manager_enumerate(m);
        if (q < 0)
                r = q;

        /* Second, deserialize our stored data */
        q = manager_deserialize(m, f, fds);
        if (q < 0)
                r = q;

        fclose(f);
        f = NULL;

        /* Re-register notify_fd as event source */
        q = manager_setup_notify(m);
        if (q < 0)
                r = q;

        /* Third, fire things up! */
        q = manager_coldplug(m);
        if (q < 0)
                r = q;

        assert(m->n_reloading > 0);
        m->n_reloading--;

        m->send_reloading_done = true;

        return r;
}

Project: systemd
File: unit.c

bool unit_can_start(Unit *u) {
        assert(u);

        return !!UNIT_VTABLE(u)->start;
}

Project: systemd
File: unit.c

int unit_setup_exec_runtime(Unit *u) {
        ExecRuntime **rt;
        size_t offset;
        Iterator i;
        Unit *other;

        offset = UNIT_VTABLE(u)->exec_runtime_offset;
        assert(offset > 0);

        /* Check if ther already is an ExecRuntime for this unit? */
        rt = (ExecRuntime**) ((uint8_t*) u + offset);
        if (*rt)
                return 0;

        /* Try to get it from somebody else */
        SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) {

                *rt = unit_get_exec_runtime(other);
                if (*rt) {
                        exec_runtime_ref(*rt);
                        return 0;
                }
        }

        return exec_runtime_make(rt, unit_get_exec_context(u), u->id);
}

Project: systemd
File: unit.c

static int watch_pids_in_path(Unit *u, const char *path) {
        _cleanup_closedir_ DIR *d = NULL;
        _cleanup_fclose_ FILE *f = NULL;
        int ret = 0, r;

        assert(u);
        assert(path);

        /* Adds all PIDs from a specific cgroup path to the set of PIDs we watch. */

        r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, path, &f);
        if (r >= 0) {
                pid_t pid;

                while ((r = cg_read_pid(f, &pid)) > 0) {
                        r = unit_watch_pid(u, pid);
                        if (r < 0 && ret >= 0)
                                ret = r;
                }
                if (r < 0 && ret >= 0)
                        ret = r;

        } else if (ret >= 0)
                ret = r;

        r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, path, &d);
        if (r >= 0) {
                char *fn;

                while ((r = cg_read_subgroup(d, &fn)) > 0) {
                        _cleanup_free_ char *p = NULL;

                        p = strjoin(path, "/", fn, NULL);
                        free(fn);

                        if (!p)
                                return -ENOMEM;

                        r = watch_pids_in_path(u, p);
                        if (r < 0 && ret >= 0)
                                ret = r;
                }
                if (r < 0 && ret >= 0)
                        ret = r;

        } else if (ret >= 0)
                ret = r;

        return ret;
}

Project: systemd
File: unit.c

static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) {
        Iterator i;
        Unit *back;
        int r;

        assert(u);
        assert(other);
        assert(d < _UNIT_DEPENDENCY_MAX);

        /* Fix backwards pointers */
        SET_FOREACH(back, other->dependencies[d], i) {
                UnitDependency k;

                for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) {
                        r = set_remove_and_put(back->dependencies[k], other, u);
                        if (r == -EEXIST)
                                set_remove(back->dependencies[k], other);
                        else
                                assert(r >= 0 || r == -ENOENT);
                }
        }

        complete_move(&u->dependencies[d], &other->dependencies[d]);

        set_free(other->dependencies[d]);
        other->dependencies[d] = NULL;
}

Project: systemd
File: unit.c

int unit_require_mounts_for(Unit *u, const char *path) {
        char prefix[strlen(path) + 1], *p;
        int r;

        assert(u);
        assert(path);

        /* Registers a unit for requiring a certain path and all its
         * prefixes. We keep a simple array of these paths in the
         * unit, since its usually short. However, we build a prefix
         * table for all possible prefixes so that new appearing mount
         * units can easily determine which units to make themselves a
         * dependency of. */

        if (!path_is_absolute(path))
                return -EINVAL;

        p = strdup(path);
        if (!p)
                return -ENOMEM;

        path_kill_slashes(p);

        if (!path_is_safe(p)) {
                free(p);
                return -EPERM;
        }

        if (strv_contains(u->requires_mounts_for, p)) {
                free(p);
                return 0;
        }

        r = strv_push(&u->requires_mounts_for, p);
        if (r < 0) {
                free(p);
                return r;
        }

        PATH_FOREACH_PREFIX_MORE(prefix, p) {
                Set *x;

                x = hashmap_get(u->manager->units_requiring_mounts_for, prefix);
                if (!x) {
                        char *q;

                        if (!u->manager->units_requiring_mounts_for) {
                                u->manager->units_requiring_mounts_for = hashmap_new(string_hash_func, string_compare_func);
                                if (!u->manager->units_requiring_mounts_for)
                                        return -ENOMEM;
                        }

                        q = strdup(prefix);
                        if (!q)
                                return -ENOMEM;

                        x = set_new(NULL, NULL);
                        if (!x) {
                                free(q);
                                return -ENOMEM;
                        }

                        r = hashmap_put(u->manager->units_requiring_mounts_for, q, x);
                        if (r < 0) {
                                free(q);
                                set_free(x);
                                return r;
                        }
                }

                r = set_put(x, u);
                if (r < 0)
                        return r;
        }

        return 0;
}

Project: systemd
File: unit.c

const char *unit_slice_name(Unit *u) {
        assert(u);

        if (!UNIT_ISSET(u->slice))
                return NULL;

        return UNIT_DEREF(u->slice)->id;
}

Project: systemd
File: manager.c

static int manager_setup_signals(Manager *m) {
        struct sigaction sa = {
                .sa_handler = SIG_DFL,
                .sa_flags = SA_NOCLDSTOP|SA_RESTART,
        };
        sigset_t mask;
        int r;

        assert(m);

        /* We are not interested in SIGSTOP and friends. */
        assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);

        assert_se(sigemptyset(&mask) == 0);

        sigset_add_many(&mask,
                        SIGCHLD,     /* Child died */
                        SIGTERM,     /* Reexecute daemon */
                        SIGHUP,      /* Reload configuration */
                        SIGUSR1,     /* systemd/upstart: reconnect to D-Bus */
                        SIGUSR2,     /* systemd: dump status */
                        SIGINT,      /* Kernel sends us this on control-alt-del */
                        SIGWINCH,    /* Kernel sends us this on kbrequest (alt-arrowup) */
                        SIGPWR,      /* Some kernel drivers and upsd send us this on power failure */
                        SIGRTMIN+0,  /* systemd: start default.target */
                        SIGRTMIN+1,  /* systemd: isolate rescue.target */
                        SIGRTMIN+2,  /* systemd: isolate emergency.target */
                        SIGRTMIN+3,  /* systemd: start halt.target */
                        SIGRTMIN+4,  /* systemd: start poweroff.target */
                        SIGRTMIN+5,  /* systemd: start reboot.target */
                        SIGRTMIN+6,  /* systemd: start kexec.target */
                        SIGRTMIN+13, /* systemd: Immediate halt */
                        SIGRTMIN+14, /* systemd: Immediate poweroff */
                        SIGRTMIN+15, /* systemd: Immediate reboot */
                        SIGRTMIN+16, /* systemd: Immediate kexec */
                        SIGRTMIN+20, /* systemd: enable status messages */
                        SIGRTMIN+21, /* systemd: disable status messages */
                        SIGRTMIN+22, /* systemd: set log level to LOG_DEBUG */
                        SIGRTMIN+23, /* systemd: set log level to LOG_INFO */
                        SIGRTMIN+24, /* systemd: Immediate exit (--user only) */
                        SIGRTMIN+26, /* systemd: set log target to journal-or-kmsg */
                        SIGRTMIN+27, /* systemd: set log target to console */
                        SIGRTMIN+28, /* systemd: set log target to kmsg */
                        SIGRTMIN+29, /* systemd: set log target to syslog-or-kmsg */
                        -1);
        assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);

        m->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
        if (m->signal_fd < 0)
                return -errno;

        r = sd_event_add_io(m->event, m->signal_fd, EPOLLIN, manager_dispatch_signal_fd, m, &m->signal_event_source);
        if (r < 0)
                return r;

        /* Process signals a bit earlier than the rest of things, but
         * later that notify_fd processing, so that the notify
         * processing can still figure out to which process/service a
         * message belongs, before we reap the process. */
        r = sd_event_source_set_priority(m->signal_event_source, -5);
        if (r < 0)
                return r;

        if (m->running_as == SYSTEMD_SYSTEM)
                return enable_special_signals(m);

        return 0;
}

Project: systemd
File: unit.c

char *unit_dbus_path(Unit *u) {
        assert(u);

        if (!u->id)
                return NULL;

        return unit_dbus_path_from_name(u->id);
}

Project: systemd
File: manager.c

static int manager_coldplug(Manager *m) {
        int r = 0, q;
        Iterator i;
        Unit *u;
        char *k;

        assert(m);

        /* Then, let's set up their initial state. */
        HASHMAP_FOREACH_KEY(u, k, m->units, i) {

                /* ignore aliases */
                if (u->id != k)
                        continue;

                if ((q = unit_coldplug(u)) < 0)
                        r = q;
        }

        return r;
}

Project: systemd
File: manager.c

static int manager_default_environment(Manager *m) {
        assert(m);

        if (m->running_as == SYSTEMD_SYSTEM) {
                /* The system manager always starts with a clean
                 * environment for its children. It does not import
                 * the kernel or the parents exported variables.
                 *
                 * The initial passed environ is untouched to keep
                 * /proc/self/environ valid; it is used for tagging
                 * the init process inside containers. */
                m->environment = strv_new("PATH=" DEFAULT_PATH,
                                          NULL);

                /* Import locale variables LC_*= from configuration */
                locale_setup(&m->environment);
        } else {
                /* The user manager passes its own environment
                 * along to its children. */
                m->environment = strv_copy(environ);
        }

        if (!m->environment)
                return -ENOMEM;

        manager_clean_environment(m);
        strv_sort(m->environment);

        return 0;
}

Project: systemd
File: unit.c

int unit_set_description(Unit *u, const char *description) {
        char *s;

        assert(u);

        if (isempty(description))
                s = NULL;
        else {
                s = strdup(description);
                if (!s)
                        return -ENOMEM;
        }

        free(u->description);
        u->description = s;

        unit_add_to_dbus_queue(u);
        return 0;
}

Project: systemd
File: unit.c

int unit_reload(Unit *u) {
        UnitActiveState state;
        Unit *following;

        assert(u);

        if (u->load_state != UNIT_LOADED)
                return -EINVAL;

        if (!unit_can_reload(u))
                return -EBADR;

        state = unit_active_state(u);
        if (state == UNIT_RELOADING)
                return -EALREADY;

        if (state != UNIT_ACTIVE) {
                log_warning_unit(u->id, "Unit %s cannot be reloaded because it is inactive.",
                                 u->id);
                return -ENOEXEC;
        }

        following = unit_following(u);
        if (following) {
                log_debug_unit(u->id, "Redirecting reload request from %s to %s.",
                               u->id, following->id);
                return unit_reload(following);
        }

        unit_status_log_starting_stopping_reloading(u, JOB_RELOAD);

        unit_add_to_dbus_queue(u);
        return UNIT_VTABLE(u)->reload(u);
}

Project: systemd
File: unit.c

bool unit_stop_pending(Unit *u) {
        assert(u);

        /* This call does check the current state of the unit. It's
         * hence useful to be called from state change calls of the
         * unit itself, where the state isn't updated yet. This is
         * different from unit_inactive_or_pending() which checks both
         * the current state and for a queued job. */

        return u->job && u->job->type == JOB_STOP;
}

Project: systemd
File: unit.c

int unit_kill_common(
                Unit *u,
                KillWho who,
                int signo,
                pid_t main_pid,
                pid_t control_pid,
                sd_bus_error *error) {

        int r = 0;

        if (who == KILL_MAIN && main_pid <= 0) {
                if (main_pid < 0)
                        sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type));
                else
                        sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
                return -ESRCH;
        }

        if (who == KILL_CONTROL && control_pid <= 0) {
                if (control_pid < 0)
                        sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type));
                else
                        sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
                return -ESRCH;
        }

        if (who == KILL_CONTROL || who == KILL_ALL)
                if (control_pid > 0)
                        if (kill(control_pid, signo) < 0)
                                r = -errno;

        if (who == KILL_MAIN || who == KILL_ALL)
                if (main_pid > 0)
                        if (kill(main_pid, signo) < 0)
                                r = -errno;

        if (who == KILL_ALL && u->cgroup_path) {
                _cleanup_set_free_ Set *pid_set = NULL;
                int q;

                /* Exclude the main/control pids from being killed via the cgroup */
                pid_set = unit_pid_set(main_pid, control_pid);
                if (!pid_set)
                        return -ENOMEM;

                q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set);
                if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT)
                        r = q;
        }

        return r;
}

Project: systemd
File: unit.c

void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) {
        Iterator i;
        void *e;

        assert(u);

        /* Cleans dead PIDs from our list */

        SET_FOREACH(e, u->pids, i) {
                pid_t pid = PTR_TO_LONG(e);

                if (pid == except1 || pid == except2)
                        continue;

                if (kill(pid, 0) < 0 && errno == ESRCH)
                        set_remove(u->pids, e);
        }
}

Project: systemd
File: manager.c

static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
        Manager *m = userdata;
        ssize_t n;

        assert(m);
        assert(m->notify_fd == fd);

        if (revents != EPOLLIN) {
                log_warning("Got unexpected poll event for notify fd.");
                return 0;
        }

        for (;;) {
                char buf[4096];
                struct iovec iovec = {
                        .iov_base = buf,
                        .iov_len = sizeof(buf)-1,
                };
                bool found = false;

                union {
                        struct cmsghdr cmsghdr;
                        uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
                } control = {};

                struct msghdr msghdr = {
                        .msg_iov = &iovec,
                        .msg_iovlen = 1,
                        .msg_control = &control,
                        .msg_controllen = sizeof(control),
                };
                struct ucred *ucred;
                Unit *u;

                n = recvmsg(m->notify_fd, &msghdr, MSG_DONTWAIT);
                if (n <= 0) {
                        if (n == 0)
                                return -EIO;

                        if (errno == EAGAIN || errno == EINTR)
                                break;

                        return -errno;
                }

                if (msghdr.msg_controllen < CMSG_LEN(sizeof(struct ucred)) ||
                    control.cmsghdr.cmsg_level != SOL_SOCKET ||
                    control.cmsghdr.cmsg_type != SCM_CREDENTIALS ||
                    control.cmsghdr.cmsg_len != CMSG_LEN(sizeof(struct ucred))) {
                        log_warning("Received notify message without credentials. Ignoring.");
                        continue;
                }

                ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr);

                assert((size_t) n < sizeof(buf));
                buf[n] = 0;

                u = manager_get_unit_by_pid(m, ucred->pid);
                if (u) {
                        manager_invoke_notify_message(m, u, ucred->pid, buf, n);
                        found = true;
                }

                u = hashmap_get(m->watch_pids1, LONG_TO_PTR(ucred->pid));
                if (u) {
                        manager_invoke_notify_message(m, u, ucred->pid, buf, n);
                        found = true;
                }

                u = hashmap_get(m->watch_pids2, LONG_TO_PTR(ucred->pid));
                if (u) {
                        manager_invoke_notify_message(m, u, ucred->pid, buf, n);
                        found = true;
                }

                if (!found)
                        log_warning("Cannot find unit for notify message of PID "PID_FMT".", ucred->pid);
        }

        return 0;
}

Project: systemd
File: manager.c

int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool override, sd_bus_error *e, Job **_ret) {
        int r;
        Transaction *tr;

        assert(m);
        assert(type < _JOB_TYPE_MAX);
        assert(unit);
        assert(mode < _JOB_MODE_MAX);

        if (mode == JOB_ISOLATE && type != JOB_START) {
                sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Isolate is only valid for start.");
                return -EINVAL;
        }

        if (mode == JOB_ISOLATE && !unit->allow_isolate) {
                sd_bus_error_setf(e, BUS_ERROR_NO_ISOLATION, "Operation refused, unit may not be isolated.");
                return -EPERM;
        }

        log_debug_unit(unit->id,
                       "Trying to enqueue job %s/%s/%s", unit->id,
                       job_type_to_string(type), job_mode_to_string(mode));

        job_type_collapse(&type, unit);

        tr = transaction_new(mode == JOB_REPLACE_IRREVERSIBLY);
        if (!tr)
                return -ENOMEM;

        r = transaction_add_job_and_dependencies(tr, type, unit, NULL, true, override, false,
                                                 mode == JOB_IGNORE_DEPENDENCIES || mode == JOB_IGNORE_REQUIREMENTS,
                                                 mode == JOB_IGNORE_DEPENDENCIES, e);
        if (r < 0)
                goto tr_abort;

        if (mode == JOB_ISOLATE) {
                r = transaction_add_isolate_jobs(tr, m);
                if (r < 0)
                        goto tr_abort;
        }

        r = transaction_activate(tr, m, mode, e);
        if (r < 0)
                goto tr_abort;

        log_debug_unit(unit->id,
                       "Enqueued job %s/%s as %u", unit->id,
                       job_type_to_string(type), (unsigned) tr->anchor_job->id);

        if (_ret)
                *_ret = tr->anchor_job;

        transaction_free(tr);
        return 0;

tr_abort:
        transaction_abort(tr);
        transaction_free(tr);
        return r;
}

Project: systemd
File: unit.c

int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
        Unit *other;
        int r;
        _cleanup_free_ char *s = NULL;

        assert(u);
        assert(name || path);

        if (!(name = resolve_template(u, name, path, &s)))
                return -ENOMEM;

        if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0)
                return r;

        if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0)
                return r;

        return r;
}

Project: systemd
File: unit.c

static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) {
        Set *pid_set;
        int r;

        pid_set = set_new(trivial_hash_func, trivial_compare_func);
        if (!pid_set)
                return NULL;

        /* Exclude the main/control pids from being killed via the cgroup */
        if (main_pid > 0) {
                r = set_put(pid_set, LONG_TO_PTR(main_pid));
                if (r < 0)
                        goto fail;
        }

        if (control_pid > 0) {
                r = set_put(pid_set, LONG_TO_PTR(control_pid));
                if (r < 0)
                        goto fail;
        }

        return pid_set;

fail:
        set_free(pid_set);
        return NULL;
}

Project: systemd
File: unit.c

void unit_add_to_cleanup_queue(Unit *u) {
        assert(u);

        if (u->in_cleanup_queue)
                return;

        LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u);
        u->in_cleanup_queue = true;
}

Project: systemd
File: unit.c

static void check_unneeded_dependencies(Unit *u) {
        Iterator i;
        Unit *other;

        assert(u);
        assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)));

        /* Garbage collect services that might not be needed anymore, if enabled */
        SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i)
                if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
                        unit_check_unneeded(other);
        SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
                if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
                        unit_check_unneeded(other);
        SET_FOREACH(other, u->dependencies[UNIT_WANTS], i)
                if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
                        unit_check_unneeded(other);
        SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i)
                if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
                        unit_check_unneeded(other);
        SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i)
                if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
                        unit_check_unneeded(other);
        SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i)
                if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
                        unit_check_unneeded(other);
}

Project: systemd
File: unit.c

_pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) {
        const UnitStatusMessageFormats *format_table;

        assert(u);
        assert(t >= 0);
        assert(t < _JOB_TYPE_MAX);

        if (t != JOB_START && t != JOB_STOP)
                return NULL;

        format_table = &UNIT_VTABLE(u)->status_message_formats;
        if (!format_table)
                return NULL;

        return format_table->starting_stopping[t == JOB_STOP];
}

Project: systemd
File: unit.c

const char* unit_sub_state_to_string(Unit *u) {
        assert(u);

        return UNIT_VTABLE(u)->sub_state_to_string(u);
}

Project: systemd
File: unit.c

bool unit_active_or_pending(Unit *u) {
        assert(u);

        /* Returns true if the unit is active or going up */

        if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)))
                return true;

        if (u->job &&
            (u->job->type == JOB_START ||
             u->job->type == JOB_RELOAD_OR_START ||
             u->job->type == JOB_RESTART))
                return true;

        return false;
}

Project: systemd
File: unit.c

int unit_choose_id(Unit *u, const char *name) {
        char *s, *i;
        _cleanup_free_ char *t = NULL;
        int r;

        assert(u);
        assert(name);

        if (unit_name_is_template(name)) {

                if (!u->instance)
                        return -EINVAL;

                t = unit_name_replace_instance(name, u->instance);
                if (!t)
                        return -ENOMEM;

                name = t;
        }

        /* Selects one of the names of this unit as the id */
        s = set_get(u->names, (char*) name);

        if (!s)
                return -ENOENT;

        r = unit_name_to_instance(s, &i);
        if (r < 0)
                return r;

        u->id = s;

        free(u->instance);
        u->instance = i;

        unit_add_to_dbus_queue(u);

        return 0;
}

Project: systemd
File: unit.c

int unit_load(Unit *u) {
        int r;

        assert(u);

        if (u->in_load_queue) {
                LIST_REMOVE(load_queue, u->manager->load_queue, u);
                u->in_load_queue = false;
        }

        if (u->type == _UNIT_TYPE_INVALID)
                return -EINVAL;

        if (u->load_state != UNIT_STUB)
                return 0;

        if (UNIT_VTABLE(u)->load) {
                r = UNIT_VTABLE(u)->load(u);
                if (r < 0)
                        goto fail;
        }

        if (u->load_state == UNIT_STUB) {
                r = -ENOENT;
                goto fail;
        }

        if (u->load_state == UNIT_LOADED) {

                if (u->default_dependencies) {
                        r = unit_add_default_dependencies(u);
                        if (r < 0)
                                goto fail;
                }

                unit_update_member_masks(u);

                r = unit_add_mount_links(u);
                if (r < 0)
                        goto fail;

                if (u->on_failure_job_mode == JOB_ISOLATE &&
                    set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) {

                        log_error_unit(u->id,
                                       "More than one OnFailure= dependencies specified for %s but OnFailureJobMode=isolate set. Refusing.", u->id);

                        r = -EINVAL;
                        goto fail;
                }
        }

        assert((u->load_state != UNIT_MERGED) == !u->merged_into);

        unit_add_to_dbus_queue(unit_follow_merge(u));
        unit_add_to_gc_queue(u);

        return 0;

fail:
        u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR;
        u->load_error = r;
        unit_add_to_dbus_queue(u);
        unit_add_to_gc_queue(u);

        log_debug_unit(u->id, "Failed to load configuration for %s: %s",
                       u->id, strerror(-r));

        return r;
}

Project: systemd
File: unit.c

int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) {
        _cleanup_free_ char *p = NULL;
        va_list ap;
        int r;

        assert(u);
        assert(name);
        assert(format);

        if (!(mode & (UNIT_PERSISTENT|UNIT_RUNTIME)))
                return 0;

        va_start(ap, format);
        r = vasprintf(&p, format, ap);
        va_end(ap);

        if (r < 0)
                return -ENOMEM;

        return unit_write_drop_in_private(u, mode, name, p);
}

Project: systemd
File: unit.c

bool unit_can_isolate(Unit *u) {
        assert(u);

        return unit_can_start(u) &&
                u->allow_isolate;
}

Project: systemd
File: unit.c

void unit_ref_unset(UnitRef *ref) {
        assert(ref);

        if (!ref->unit)
                return;

        LIST_REMOVE(refs, ref->unit->refs, ref);
        ref->unit = NULL;
}

Project: systemd
File: unit.c

static bool unit_condition_test(Unit *u) {
        assert(u);

        dual_timestamp_get(&u->condition_timestamp);
        u->condition_result = condition_test_list(u->id, u->conditions);

        return u->condition_result;
}

Project: systemd
File: unit.c

static void unit_remove_transient(Unit *u) {
        char **i;

        assert(u);

        if (!u->transient)
                return;

        if (u->fragment_path)
                unlink(u->fragment_path);

        STRV_FOREACH(i, u->dropin_paths) {
                _cleanup_free_ char *p = NULL;
                int r;

                unlink(*i);

                r = path_get_parent(*i, &p);
                if (r >= 0)
                        rmdir(p);
        }
}

Project: systemd
File: unit.c

int unit_make_transient(Unit *u) {
        int r;

        assert(u);

        u->load_state = UNIT_STUB;
        u->load_error = 0;
        u->transient = true;

        free(u->fragment_path);
        u->fragment_path = NULL;

        if (u->manager->running_as == SYSTEMD_USER) {
                _cleanup_free_ char *c = NULL;

                r = user_config_home(&c);
                if (r < 0)
                        return r;
                if (r == 0)
                        return -ENOENT;

                u->fragment_path = strjoin(c, "/", u->id, NULL);
                if (!u->fragment_path)
                        return -ENOMEM;

                mkdir_p(c, 0755);
        } else {
                u->fragment_path = strappend("/run/systemd/system/", u->id);
                if (!u->fragment_path)
                        return -ENOMEM;

                mkdir_p("/run/systemd/system", 0755);
        }

        return write_string_file_atomic_label(u->fragment_path, "# Transient stub");
}

Project: systemd
File: unit.c

void unit_free(Unit *u) {
        UnitDependency d;
        Iterator i;
        char *t;

        assert(u);

        if (u->manager->n_reloading <= 0)
                unit_remove_transient(u);

        bus_unit_send_removed_signal(u);

        if (u->load_state != UNIT_STUB)
                if (UNIT_VTABLE(u)->done)
                        UNIT_VTABLE(u)->done(u);

        unit_free_requires_mounts_for(u);

        SET_FOREACH(t, u->names, i)
                hashmap_remove_value(u->manager->units, t, u);

        if (u->job) {
                Job *j = u->job;
                job_uninstall(j);
                job_free(j);
        }

        if (u->nop_job) {
                Job *j = u->nop_job;
                job_uninstall(j);
                job_free(j);
        }

        for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
                bidi_set_free(u, u->dependencies[d]);

        if (u->type != _UNIT_TYPE_INVALID)
                LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u);

        if (u->in_load_queue)
                LIST_REMOVE(load_queue, u->manager->load_queue, u);

        if (u->in_dbus_queue)
                LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u);

        if (u->in_cleanup_queue)
                LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u);

        if (u->in_gc_queue) {
                LIST_REMOVE(gc_queue, u->manager->gc_queue, u);
                u->manager->n_in_gc_queue--;
        }

        if (u->in_cgroup_queue)
                LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u);

        if (u->cgroup_path) {
                hashmap_remove(u->manager->cgroup_unit, u->cgroup_path);
                free(u->cgroup_path);
        }

        free(u->description);
        strv_free(u->documentation);
        free(u->fragment_path);
        free(u->source_path);
        strv_free(u->dropin_paths);
        free(u->instance);

        set_free_free(u->names);

        unit_unwatch_all_pids(u);

        condition_free_list(u->conditions);

        unit_ref_unset(&u->slice);

        while (u->refs)
                unit_ref_unset(u->refs);

        free(u);
}

Project: systemd
File: manager.c

static bool manager_get_show_status(Manager *m) {
        assert(m);

        if (m->running_as != SYSTEMD_SYSTEM)
                return false;

        if (m->no_console_output)
                return false;

        if (m->show_status > 0)
                return true;

        /* If Plymouth is running make sure we show the status, so
         * that there's something nice to see when people press Esc */

        return plymouth_running();
}

Project: systemd
File: manager.c

void manager_clear_jobs(Manager *m) {
        Job *j;

        assert(m);

        while ((j = hashmap_first(m->jobs)))
                /* No need to recurse. We're cancelling all jobs. */
                job_finish_and_invalidate(j, JOB_CANCELED, false);
}

Project: systemd
File: manager.c

static int manager_dispatch_idle_pipe_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
        Manager *m = userdata;

        assert(m);
        assert(m->idle_pipe[2] == fd);

        m->no_console_output = m->n_on_console > 0;

        m->idle_pipe_event_source = sd_event_source_unref(m->idle_pipe_event_source);
        manager_close_idle_pipe(m);

        return 0;
}

Project: systemd
File: manager.c

static int manager_dispatch_sigchld(Manager *m) {
        assert(m);

        for (;;) {
                siginfo_t si = {};

                /* First we call waitd() for a PID and do not reap the
                 * zombie. That way we can still access /proc/$PID for
                 * it while it is a zombie. */
                if (waitid(P_ALL, 0, &si, WEXITED|WNOHANG|WNOWAIT) < 0) {

                        if (errno == ECHILD)
                                break;

                        if (errno == EINTR)
                                continue;

                        return -errno;
                }

                if (si.si_pid <= 0)
                        break;

                if (si.si_code == CLD_EXITED || si.si_code == CLD_KILLED || si.si_code == CLD_DUMPED) {
                        _cleanup_free_ char *name = NULL;
                        Unit *u;

                        get_process_comm(si.si_pid, &name);

                        log_debug("Child "PID_FMT" (%s) died (code=%s, status=%i/%s)",
                                  si.si_pid, strna(name),
                                  sigchld_code_to_string(si.si_code),
                                  si.si_status,
                                  strna(si.si_code == CLD_EXITED
                                        ? exit_status_to_string(si.si_status, EXIT_STATUS_FULL)
                                        : signal_to_string(si.si_status)));

                        /* And now figure out the unit this belongs
                         * to, it might be multiple... */
                        u = manager_get_unit_by_pid(m, si.si_pid);
                        if (u)
                                invoke_sigchld_event(m, u, &si);
                        u = hashmap_get(m->watch_pids1, LONG_TO_PTR(si.si_pid));
                        if (u)
                                invoke_sigchld_event(m, u, &si);
                        u = hashmap_get(m->watch_pids2, LONG_TO_PTR(si.si_pid));
                        if (u)
                                invoke_sigchld_event(m, u, &si);
                }

                /* And now, we actually reap the zombie. */
                if (waitid(P_PID, si.si_pid, &si, WEXITED) < 0) {
                        if (errno == EINTR)
                                continue;

                        return -errno;
                }
        }

        return 0;
}

Project: systemd
File: unit.c

char *unit_default_cgroup_path(Unit *u) {
        _cleanup_free_ char *escaped = NULL, *slice = NULL;
        int r;

        assert(u);

        if (unit_has_name(u, SPECIAL_ROOT_SLICE))
                return strdup(u->manager->cgroup_root);

        if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) {
                r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice);
                if (r < 0)
                        return NULL;
        }

        escaped = cg_escape(u->id);
        if (!escaped)
                return NULL;

        if (slice)
                return strjoin(u->manager->cgroup_root, "/", slice, "/", escaped, NULL);
        else
                return strjoin(u->manager->cgroup_root, "/", escaped, NULL);
}

Project: systemd
File: unit.c

int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) {
        _cleanup_free_ char *ndata = NULL;

        assert(u);
        assert(name);
        assert(data);

        if (!UNIT_VTABLE(u)->private_section)
                return -EINVAL;

        if (!(mode & (UNIT_PERSISTENT|UNIT_RUNTIME)))
                return 0;

        ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL);
        if (!ndata)
                return -ENOMEM;

        return unit_write_drop_in(u, mode, name, ndata);
}

Project: systemd
File: unit.c

void unit_reset_failed(Unit *u) {
        assert(u);

        if (UNIT_VTABLE(u)->reset_failed)
                UNIT_VTABLE(u)->reset_failed(u);
}

Project: systemd
File: manager.c

int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {
        int r = 0;

        assert(m);
        assert(f);

        log_debug("Deserializing state...");

        m->n_reloading ++;

        for (;;) {
                char line[LINE_MAX], *l;

                if (!fgets(line, sizeof(line), f)) {
                        if (feof(f))
                                r = 0;
                        else
                                r = -errno;

                        goto finish;
                }

                char_array_0(line);
                l = strstrip(line);

                if (l[0] == 0)
                        break;

                if (startswith(l, "current-job-id=")) {
                        uint32_t id;

                        if (safe_atou32(l+15, &id) < 0)
                                log_debug("Failed to parse current job id value %s", l+15);
                        else
                                m->current_job_id = MAX(m->current_job_id, id);

                } else if (startswith(l, "n-installed-jobs=")) {
                        uint32_t n;

                        if (safe_atou32(l+17, &n) < 0)
                                log_debug("Failed to parse installed jobs counter %s", l+17);
                        else
                                m->n_installed_jobs += n;

                } else if (startswith(l, "n-failed-jobs=")) {
                        uint32_t n;

                        if (safe_atou32(l+14, &n) < 0)
                                log_debug("Failed to parse failed jobs counter %s", l+14);
                        else
                                m->n_failed_jobs += n;

                } else if (startswith(l, "taint-usr=")) {
                        int b;

                        b = parse_boolean(l+10);
                        if (b < 0)
                                log_debug("Failed to parse taint /usr flag %s", l+10);
                        else
                                m->taint_usr = m->taint_usr || b;

                } else if (startswith(l, "firmware-timestamp="))
                        dual_timestamp_deserialize(l+19, &m->firmware_timestamp);
                else if (startswith(l, "loader-timestamp="))
                        dual_timestamp_deserialize(l+17, &m->loader_timestamp);
                else if (startswith(l, "kernel-timestamp="))
                        dual_timestamp_deserialize(l+17, &m->kernel_timestamp);
                else if (startswith(l, "initrd-timestamp="))
                        dual_timestamp_deserialize(l+17, &m->initrd_timestamp);
                else if (startswith(l, "userspace-timestamp="))
                        dual_timestamp_deserialize(l+20, &m->userspace_timestamp);
                else if (startswith(l, "finish-timestamp="))
                        dual_timestamp_deserialize(l+17, &m->finish_timestamp);
                else if (startswith(l, "security-start-timestamp="))
                        dual_timestamp_deserialize(l+25, &m->security_start_timestamp);
                else if (startswith(l, "security-finish-timestamp="))
                        dual_timestamp_deserialize(l+26, &m->security_finish_timestamp);
                else if (startswith(l, "generators-start-timestamp="))
                        dual_timestamp_deserialize(l+27, &m->generators_start_timestamp);
                else if (startswith(l, "generators-finish-timestamp="))
                        dual_timestamp_deserialize(l+28, &m->generators_finish_timestamp);
                else if (startswith(l, "units-load-start-timestamp="))
                        dual_timestamp_deserialize(l+27, &m->units_load_start_timestamp);
                else if (startswith(l, "units-load-finish-timestamp="))
                        dual_timestamp_deserialize(l+28, &m->units_load_finish_timestamp);
                else if (startswith(l, "env=")) {
                        _cleanup_free_ char *uce = NULL;
                        char **e;

                        uce = cunescape(l+4);
                        if (!uce) {
                                r = -ENOMEM;
                                goto finish;
                        }

                        e = strv_env_set(m->environment, uce);
                        if (!e) {
                                r = -ENOMEM;
                                goto finish;
                        }

                        strv_free(m->environment);
                        m->environment = e;

                } else if (startswith(l, "notify-fd=")) {
                        int fd;

                        if (safe_atoi(l + 10, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
                                log_debug("Failed to parse notify fd: %s", l + 10);
                        else {
                                if (m->notify_fd >= 0) {
                                        m->notify_event_source = sd_event_source_unref(m->notify_event_source);
                                        close_nointr_nofail(m->notify_fd);
                                }

                                m->notify_fd = fdset_remove(fds, fd);
                        }

                } else if (startswith(l, "notify-socket=")) {
                        char *n;

                        n = strdup(l+14);
                        if (!n) {
                                r = -ENOMEM;
                                goto finish;
                        }

                        free(m->notify_socket);
                        m->notify_socket = n;

                } else if (startswith(l, "kdbus-fd=")) {
                        int fd;

                        if (safe_atoi(l + 9, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
                                log_debug("Failed to parse kdbus fd: %s", l + 9);
                        else {
                                if (m->kdbus_fd >= 0)
                                        close_nointr_nofail(m->kdbus_fd);

                                m->kdbus_fd = fdset_remove(fds, fd);
                        }

                } else if (bus_deserialize_item(m, l) == 0)
                        log_debug("Unknown serialization item '%s'", l);
        }

        for (;;) {
                Unit *u;
                char name[UNIT_NAME_MAX+2];

                /* Start marker */
                if (!fgets(name, sizeof(name), f)) {
                        if (feof(f))
                                r = 0;
                        else
                                r = -errno;

                        goto finish;
                }

                char_array_0(name);

                r = manager_load_unit(m, strstrip(name), NULL, NULL, &u);
                if (r < 0)
                        goto finish;

                r = unit_deserialize(u, f, fds);
                if (r < 0)
                        goto finish;
        }

finish:
        if (ferror(f))
                r = -EIO;

        assert(m->n_reloading > 0);
        m->n_reloading --;

        return r;
}

Project: systemd
File: unit.c

bool unit_check_gc(Unit *u) {
        assert(u);

        if (u->load_state == UNIT_STUB)
                return true;

        if (UNIT_VTABLE(u)->no_gc)
                return true;

        if (u->no_gc)
                return true;

        if (u->job)
                return true;

        if (u->nop_job)
                return true;

        if (unit_active_state(u) != UNIT_INACTIVE)
                return true;

        if (u->refs)
                return true;

        if (UNIT_VTABLE(u)->check_gc)
                if (UNIT_VTABLE(u)->check_gc(u))
                        return true;

        return false;
}

Project: systemd
File: unit.c

int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) {
        _cleanup_free_ char *p = NULL;
        va_list ap;
        int r;

        assert(u);
        assert(name);
        assert(format);

        if (!(mode & (UNIT_PERSISTENT|UNIT_RUNTIME)))
                return 0;

        va_start(ap, format);
        r = vasprintf(&p, format, ap);
        va_end(ap);

        if (r < 0)
                return -ENOMEM;

        return unit_write_drop_in(u, mode, name, p);
}

Project: systemd
File: unit.c

int unit_watch_all_pids(Unit *u) {
        assert(u);

        if (!u->cgroup_path)
                return -ENOENT;

        /* Adds all PIDs from our cgroup to the set of PIDs we watch */

        return watch_pids_in_path(u, u->cgroup_path);
}

Project: systemd
File: unit.c

int unit_load_fragment_and_dropin_optional(Unit *u) {
        int r;

        assert(u);

        /* Same as unit_load_fragment_and_dropin(), but whether
         * something can be loaded or not doesn't matter. */

        /* Load a .service file */
        r = unit_load_fragment(u);
        if (r < 0)
                return r;

        if (u->load_state == UNIT_STUB)
                u->load_state = UNIT_LOADED;

        /* Load drop-in directory data */
        r = unit_load_dropin(unit_follow_merge(u));
        if (r < 0)
                return r;

        return 0;
}

Project: systemd
File: unit.c

bool unit_inactive_or_pending(Unit *u) {
        assert(u);

        /* Returns true if the unit is inactive or going down */

        if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)))
                return true;

        if (unit_stop_pending(u))
                return true;

        return false;
}

Project: systemd
File: unit.c

Unit* unit_ref_set(UnitRef *ref, Unit *u) {
        assert(ref);
        assert(u);

        if (ref->unit)
                unit_ref_unset(ref);

        ref->unit = u;
        LIST_PREPEND(refs, u->refs, ref);
        return u;
}

Project: systemd
File: unit.c

int unit_coldplug(Unit *u) {
        int r;

        assert(u);

        if (UNIT_VTABLE(u)->coldplug)
                if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0)
                        return r;

        if (u->job) {
                r = job_coldplug(u->job);
                if (r < 0)
                        return r;
        } else if (u->deserialized_job >= 0) {
                /* legacy */
                r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL);
                if (r < 0)
                        return r;

                u->deserialized_job = _JOB_TYPE_INVALID;
        }

        return 0;
}

Project: systemd
File: unit.c

static void retroactively_stop_dependencies(Unit *u) {
        Iterator i;
        Unit *other;

        assert(u);
        assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)));

        /* Pull down units which are bound to us recursively if enabled */
        SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i)
                if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
                        manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
}

Project: systemd
File: unit.c

static void complete_move(Set **s, Set **other) {
        assert(s);
        assert(other);

        if (!*other)
                return;

        if (*s)
                set_move(*s, *other);
        else {
                *s = *other;
                *other = NULL;
        }
}

Project: systemd
File: unit.c

static int drop_in_file(Unit *u, UnitSetPropertiesMode mode, const char *name, char **_p, char **_q) {
        _cleanup_free_ char *b = NULL;
        char *p, *q;
        int r;

        assert(u);
        assert(name);
        assert(_p);
        assert(_q);
        assert(mode & (UNIT_PERSISTENT|UNIT_RUNTIME));

        b = xescape(name, "/.");
        if (!b)
                return -ENOMEM;

        if (!filename_is_safe(b))
                return -EINVAL;

        if (u->manager->running_as == SYSTEMD_USER) {
                _cleanup_free_ char *c = NULL;

                r = user_config_home(&c);
                if (r < 0)
                        return r;
                if (r == 0)
                        return -ENOENT;

                p = strjoin(c, "/", u->id, ".d", NULL);
        } else if (mode & UNIT_PERSISTENT)
                p = strjoin("/etc/systemd/system/", u->id, ".d", NULL);
        else
                p = strjoin("/run/systemd/system/", u->id, ".d", NULL);
        if (!p)
                return -ENOMEM;

        q = strjoin(p, "/90-", b, ".conf", NULL);
        if (!q) {
                free(p);
                return -ENOMEM;
        }

        *_p = p;
        *_q = q;
        return 0;
}

Project: systemd
File: unit.c

int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) {
        _cleanup_free_ char *p = NULL, *q = NULL;
        int r;

        assert(u);
        assert(name);
        assert(data);

        if (!(mode & (UNIT_PERSISTENT|UNIT_RUNTIME)))
                return 0;

        r = drop_in_file(u, mode, name, &p, &q);
        if (r < 0)
                return r;

        mkdir_p(p, 0755);
        return write_string_file_atomic_label(q, data);
}

Project: systemd
File: unit.c

static void bidi_set_free(Unit *u, Set *s) {
        Iterator i;
        Unit *other;

        assert(u);

        /* Frees the set and makes sure we are dropped from the
         * inverse pointers */

        SET_FOREACH(other, s, i) {
                UnitDependency d;

                for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
                        set_remove(other->dependencies[d], u);

                unit_add_to_gc_queue(other);
        }

        set_free(s);
}

Project: systemd
File: unit.c

int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) {

        static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = {
                [UNIT_REQUIRES] = UNIT_REQUIRED_BY,
                [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE,
                [UNIT_WANTS] = UNIT_WANTED_BY,
                [UNIT_REQUISITE] = UNIT_REQUIRED_BY,
                [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE,
                [UNIT_BINDS_TO] = UNIT_BOUND_BY,
                [UNIT_PART_OF] = UNIT_CONSISTS_OF,
                [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID,
                [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID,
                [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID,
                [UNIT_BOUND_BY] = UNIT_BINDS_TO,
                [UNIT_CONSISTS_OF] = UNIT_PART_OF,
                [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY,
                [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS,
                [UNIT_BEFORE] = UNIT_AFTER,
                [UNIT_AFTER] = UNIT_BEFORE,
                [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID,
                [UNIT_REFERENCES] = UNIT_REFERENCED_BY,
                [UNIT_REFERENCED_BY] = UNIT_REFERENCES,
                [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY,
                [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS,
                [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM,
                [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO,
                [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF,
        };
        int r, q = 0, v = 0, w = 0;

        assert(u);
        assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX);
        assert(other);

        u = unit_follow_merge(u);
        other = unit_follow_merge(other);

        /* We won't allow dependencies on ourselves. We will not
         * consider them an error however. */
        if (u == other)
                return 0;

        r = set_ensure_allocated(&u->dependencies[d], trivial_hash_func, trivial_compare_func);
        if (r < 0)
                return r;

        if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) {
                r = set_ensure_allocated(&other->dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func);
                if (r < 0)
                        return r;
        }

        if (add_reference) {
                r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func);
                if (r < 0)
                        return r;

                r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func);
                if (r < 0)
                        return r;
        }

        q = set_put(u->dependencies[d], other);
        if (q < 0)
                return q;

        if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) {
                v = set_put(other->dependencies[inverse_table[d]], u);
                if (v < 0) {
                        r = v;
                        goto fail;
                }
        }

        if (add_reference) {
                w = set_put(u->dependencies[UNIT_REFERENCES], other);
                if (w < 0) {
                        r = w;
                        goto fail;
                }

                r = set_put(other->dependencies[UNIT_REFERENCED_BY], u);
                if (r < 0)
                        goto fail;
        }

        unit_add_to_dbus_queue(u);
        return 0;

fail:
        if (q > 0)
                set_remove(u->dependencies[d], other);

        if (v > 0)
                set_remove(other->dependencies[inverse_table[d]], u);

        if (w > 0)
                set_remove(u->dependencies[UNIT_REFERENCES], other);

        return r;
}

Project: systemd
File: unit.c

void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) {
        va_list ap;

        assert(u);
        assert(f);
        assert(key);
        assert(format);

        fputs(key, f);
        fputc('=', f);

        va_start(ap, format);
        vfprintf(f, format, ap);
        va_end(ap);

        fputc('\n', f);
}

Project: systemd
File: manager.c

void manager_send_unit_plymouth(Manager *m, Unit *u) {
        int fd = -1;
        union sockaddr_union sa;
        int n = 0;
        char *message = NULL;

        /* Don't generate plymouth events if the service was already
         * started and we're just deserializing */
        if (m->n_reloading > 0)
                return;

        if (m->running_as != SYSTEMD_SYSTEM)
                return;

        if (detect_container(NULL) > 0)
                return;

        if (u->type != UNIT_SERVICE &&
            u->type != UNIT_MOUNT &&
            u->type != UNIT_SWAP)
                return;

        /* We set SOCK_NONBLOCK here so that we rather drop the
         * message then wait for plymouth */
        fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
        if (fd < 0) {
                log_error("socket() failed: %m");
                return;
        }

        zero(sa);
        sa.sa.sa_family = AF_UNIX;
        strncpy(sa.un.sun_path+1, "/org/freedesktop/plymouthd", sizeof(sa.un.sun_path)-1);
        if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)) < 0) {

                if (errno != EPIPE &&
                    errno != EAGAIN &&
                    errno != ENOENT &&
                    errno != ECONNREFUSED &&
                    errno != ECONNRESET &&
                    errno != ECONNABORTED)
                        log_error("connect() failed: %m");

                goto finish;
        }

        if (asprintf(&message, "U\002%c%s%n", (int) (strlen(u->id) + 1), u->id, &n) < 0) {
                log_oom();
                goto finish;
        }

        errno = 0;
        if (write(fd, message, n + 1) != n + 1) {

                if (errno != EPIPE &&
                    errno != EAGAIN &&
                    errno != ENOENT &&
                    errno != ECONNREFUSED &&
                    errno != ECONNRESET &&
                    errno != ECONNABORTED)
                        log_error("Failed to write Plymouth message: %m");

                goto finish;
        }

finish:
        if (fd >= 0)
                close_nointr_nofail(fd);

        free(message);
}

Project: systemd
File: unit.c

int unit_add_exec_dependencies(Unit *u, ExecContext *c) {
        int r;

        assert(u);
        assert(c);

        if (c->working_directory) {
                r = unit_require_mounts_for(u, c->working_directory);
                if (r < 0)
                        return r;
        }

        if (c->root_directory) {
                r = unit_require_mounts_for(u, c->root_directory);
                if (r < 0)
                        return r;
        }

        if (c->std_output != EXEC_OUTPUT_KMSG &&
            c->std_output != EXEC_OUTPUT_SYSLOG &&
            c->std_output != EXEC_OUTPUT_JOURNAL &&
            c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE &&
            c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE &&
            c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE &&
            c->std_error != EXEC_OUTPUT_KMSG &&
            c->std_error != EXEC_OUTPUT_SYSLOG &&
            c->std_error != EXEC_OUTPUT_JOURNAL &&
            c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE &&
            c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE &&
            c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE)
                return 0;

        /* If syslog or kernel logging is requested, make sure our own
         * logging daemon is run first. */

        if (u->manager->running_as == SYSTEMD_SYSTEM) {
                r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true);
                if (r < 0)
                        return r;
        }

        return 0;
}

Project: systemd
File: unit.c

int unit_stop(Unit *u) {
        UnitActiveState state;
        Unit *following;

        assert(u);

        state = unit_active_state(u);
        if (UNIT_IS_INACTIVE_OR_FAILED(state))
                return -EALREADY;

        if ((following = unit_following(u))) {
                log_debug_unit(u->id, "Redirecting stop request from %s to %s.",
                               u->id, following->id);
                return unit_stop(following);
        }

        unit_status_log_starting_stopping_reloading(u, JOB_STOP);
        unit_status_print_starting_stopping(u, JOB_STOP);

        if (!UNIT_VTABLE(u)->stop)
                return -EBADR;

        unit_add_to_dbus_queue(u);

        return UNIT_VTABLE(u)->stop(u);
}

Project: systemd
File: manager.c

static void remove_generator_dir(Manager *m, char **generator) {
        assert(m);
        assert(generator);

        if (!*generator)
                return;

        strv_remove(m->lookup_paths.unit_path, *generator);
        rm_rf(*generator, false, true, false);

        free(*generator);
        *generator = NULL;
}

Project: systemd
File: manager.c

int manager_environment_add(Manager *m, char **minus, char **plus) {
        char **a = NULL, **b = NULL, **l;
        assert(m);

        l = m->environment;

        if (!strv_isempty(minus)) {
                a = strv_env_delete(l, 1, minus);
                if (!a)
                        return -ENOMEM;

                l = a;
        }

        if (!strv_isempty(plus)) {
                b = strv_env_merge(2, l, plus);
                if (!b)
                        return -ENOMEM;

                l = b;
        }

        if (m->environment != l)
                strv_free(m->environment);
        if (a != l)
                strv_free(a);
        if (b != l)
                strv_free(b);

        m->environment = l;
        manager_clean_environment(m);
        strv_sort(m->environment);

        return 0;
}

Project: systemd
File: manager.c

static int manager_connect_bus(Manager *m, bool reexecuting) {
        bool try_bus_connect;

        assert(m);

        try_bus_connect =
                m->kdbus_fd >= 0 ||
                reexecuting ||
                (m->running_as == SYSTEMD_USER && getenv("DBUS_SESSION_BUS_ADDRESS"));

        /* Try to connect to the busses, if possible. */
        return bus_init(m, try_bus_connect);
}

Project: systemd
File: unit.c

void unit_add_to_load_queue(Unit *u) {
        assert(u);
        assert(u->type != _UNIT_TYPE_INVALID);

        if (u->load_state != UNIT_STUB || u->in_load_queue)
                return;

        LIST_PREPEND(load_queue, u->manager->load_queue, u);
        u->in_load_queue = true;
}

Project: systemd
File: unit.c

int unit_watch_pid(Unit *u, pid_t pid) {
        int q, r;

        assert(u);
        assert(pid >= 1);

        /* Watch a specific PID. We only support one or two units
         * watching each PID for now, not more. */

        r = hashmap_ensure_allocated(&u->manager->watch_pids1, trivial_hash_func, trivial_compare_func);
        if (r < 0)
                return r;

        r = set_ensure_allocated(&u->pids, trivial_hash_func, trivial_compare_func);
        if (r < 0)
                return r;

        r = hashmap_put(u->manager->watch_pids1, LONG_TO_PTR(pid), u);
        if (r == -EEXIST) {
                r = hashmap_ensure_allocated(&u->manager->watch_pids2, trivial_hash_func, trivial_compare_func);
                if (r < 0)
                        return r;

                r = hashmap_put(u->manager->watch_pids2, LONG_TO_PTR(pid), u);
        }

        q = set_put(u->pids, LONG_TO_PTR(pid));
        if (q < 0)
                return q;

        return r;
}

Project: systemd
File: manager.c

static bool manager_is_booting_or_shutting_down(Manager *m) {
        Unit *u;

        assert(m);

        /* Is the initial job still around? */
        if (manager_get_job(m, m->default_unit_job_id))
                return true;

        /* Is there a job for the shutdown target? */
        u = manager_get_unit(m, SPECIAL_SHUTDOWN_TARGET);
        if (u)
                return !!u->job;

        return false;
}

Project: systemd
File: manager.c

void manager_free(Manager *m) {
        UnitType c;
        int i;

        assert(m);

        manager_clear_jobs_and_units(m);

        for (c = 0; c < _UNIT_TYPE_MAX; c++)
                if (unit_vtable[c]->shutdown)
                        unit_vtable[c]->shutdown(m);

        /* If we reexecute ourselves, we keep the root cgroup
         * around */
        manager_shutdown_cgroup(m, m->exit_code != MANAGER_REEXECUTE);

        manager_undo_generators(m);

        bus_done(m);

        hashmap_free(m->units);
        hashmap_free(m->jobs);
        hashmap_free(m->watch_pids1);
        hashmap_free(m->watch_pids2);
        hashmap_free(m->watch_bus);

        sd_event_source_unref(m->signal_event_source);
        sd_event_source_unref(m->notify_event_source);
        sd_event_source_unref(m->time_change_event_source);
        sd_event_source_unref(m->jobs_in_progress_event_source);
        sd_event_source_unref(m->idle_pipe_event_source);
        sd_event_source_unref(m->run_queue_event_source);

        if (m->signal_fd >= 0)
                close_nointr_nofail(m->signal_fd);
        if (m->notify_fd >= 0)
                close_nointr_nofail(m->notify_fd);
        if (m->time_change_fd >= 0)
                close_nointr_nofail(m->time_change_fd);
        if (m->kdbus_fd >= 0)
                close_nointr_nofail(m->kdbus_fd);

        manager_close_idle_pipe(m);

        udev_unref(m->udev);
        sd_event_unref(m->event);

        free(m->notify_socket);

        lookup_paths_free(&m->lookup_paths);
        strv_free(m->environment);

        hashmap_free(m->cgroup_unit);
        set_free_free(m->unit_path_cache);

        free(m->switch_root);
        free(m->switch_root_init);

        for (i = 0; i < RLIMIT_NLIMITS; i++)
                free(m->rlimit[i]);

        assert(hashmap_isempty(m->units_requiring_mounts_for));
        hashmap_free(m->units_requiring_mounts_for);

        free(m);
}

Project: systemd
File: unit.c

void unit_start_on_failure(Unit *u) {
        Unit *other;
        Iterator i;

        assert(u);

        if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0)
                return;

        log_info_unit(u->id, "Triggering OnFailure= dependencies of %s.", u->id);

        SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) {
                int r;

                r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, true, NULL, NULL);
                if (r < 0)
                        log_error_unit(u->id, "Failed to enqueue OnFailure= job: %s", strerror(-r));
        }
}

Project: systemd
File: manager.c

int manager_loop(Manager *m) {
        int r;

        RATELIMIT_DEFINE(rl, 1*USEC_PER_SEC, 50000);

        assert(m);
        m->exit_code = MANAGER_RUNNING;

        /* Release the path cache */
        set_free_free(m->unit_path_cache);
        m->unit_path_cache = NULL;

        manager_check_finished(m);

        /* There might still be some zombies hanging around from
         * before we were exec()'ed. Let's reap them. */
        r = manager_dispatch_sigchld(m);
        if (r < 0)
                return r;

        while (m->exit_code == MANAGER_RUNNING) {
                usec_t wait_usec;

                if (m->runtime_watchdog > 0 && m->running_as == SYSTEMD_SYSTEM)
                        watchdog_ping();

                if (!ratelimit_test(&rl)) {
                        /* Yay, something is going seriously wrong, pause a little */
                        log_warning("Looping too fast. Throttling execution a little.");
                        sleep(1);
                        continue;
                }

                if (manager_dispatch_load_queue(m) > 0)
                        continue;

                if (manager_dispatch_gc_queue(m) > 0)
                        continue;

                if (manager_dispatch_cleanup_queue(m) > 0)
                        continue;

                if (manager_dispatch_cgroup_queue(m) > 0)
                        continue;

                if (manager_dispatch_dbus_queue(m) > 0)
                        continue;

                /* Sleep for half the watchdog time */
                if (m->runtime_watchdog > 0 && m->running_as == SYSTEMD_SYSTEM) {
                        wait_usec = m->runtime_watchdog / 2;
                        if (wait_usec <= 0)
                                wait_usec = 1;
                } else
                        wait_usec = (usec_t) -1;

                r = sd_event_run(m->event, wait_usec);
                if (r < 0) {
                        log_error("Failed to run event loop: %s", strerror(-r));
                        return r;
                }
        }

        return m->exit_code;
}

Project: systemd
File: unit.c

void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) {
        manager_status_printf(u->manager, false, status, unit_status_msg_format, unit_description(u));
}

Project: systemd
File: manager.c

int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool override, sd_bus_error *e, Job **_ret) {
        Unit *unit;
        int r;

        assert(m);
        assert(type < _JOB_TYPE_MAX);
        assert(name);
        assert(mode < _JOB_MODE_MAX);

        r = manager_load_unit(m, name, NULL, NULL, &unit);
        if (r < 0)
                return r;

        return manager_add_job(m, type, unit, mode, override, e, _ret);
}

Project: systemd
File: manager.c

static int manager_distribute_fds(Manager *m, FDSet *fds) {
        Unit *u;
        Iterator i;
        int r;

        assert(m);

        HASHMAP_FOREACH(u, m->units, i) {

                if (fdset_size(fds) <= 0)
                        break;

                if (UNIT_VTABLE(u)->distribute_fds) {
                        r = UNIT_VTABLE(u)->distribute_fds(u, fds);
                        if (r < 0)
                                return r;
                }
        }

        return 0;
}

Project: systemd
File: unit.c

int unit_deserialize(Unit *u, FILE *f, FDSet *fds) {
        size_t offset;
        ExecRuntime **rt = NULL;
        int r;

        assert(u);
        assert(f);
        assert(fds);

        if (!unit_can_serialize(u))
                return 0;

        offset = UNIT_VTABLE(u)->exec_runtime_offset;
        if (offset > 0)
                rt = (ExecRuntime**) ((uint8_t*) u + offset);

        for (;;) {
                char line[LINE_MAX], *l, *v;
                size_t k;

                if (!fgets(line, sizeof(line), f)) {
                        if (feof(f))
                                return 0;
                        return -errno;
                }

                char_array_0(line);
                l = strstrip(line);

                /* End marker */
                if (l[0] == 0)
                        return 0;

                k = strcspn(l, "=");

                if (l[k] == '=') {
                        l[k] = 0;
                        v = l+k+1;
                } else
                        v = l+k;

                if (streq(l, "job")) {
                        if (v[0] == '\0') {
                                /* new-style serialized job */
                                Job *j = job_new_raw(u);
                                if (!j)
                                        return -ENOMEM;

                                r = job_deserialize(j, f, fds);
                                if (r < 0) {
                                        job_free(j);
                                        return r;
                                }

                                r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j);
                                if (r < 0) {
                                        job_free(j);
                                        return r;
                                }

                                r = job_install_deserialized(j);
                                if (r < 0) {
                                        hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id));
                                        job_free(j);
                                        return r;
                                }

                                if (j->state == JOB_RUNNING)
                                        u->manager->n_running_jobs++;
                        } else {
                                /* legacy */
                                JobType type = job_type_from_string(v);
                                if (type < 0)
                                        log_debug("Failed to parse job type value %s", v);
                                else
                                        u->deserialized_job = type;
                        }
                        continue;
                } else if (streq(l, "inactive-exit-timestamp")) {
                        dual_timestamp_deserialize(v, &u->inactive_exit_timestamp);
                        continue;
                } else if (streq(l, "active-enter-timestamp")) {
                        dual_timestamp_deserialize(v, &u->active_enter_timestamp);
                        continue;
                } else if (streq(l, "active-exit-timestamp")) {
                        dual_timestamp_deserialize(v, &u->active_exit_timestamp);
                        continue;
                } else if (streq(l, "inactive-enter-timestamp")) {
                        dual_timestamp_deserialize(v, &u->inactive_enter_timestamp);
                        continue;
                } else if (streq(l, "condition-timestamp")) {
                        dual_timestamp_deserialize(v, &u->condition_timestamp);
                        continue;
                } else if (streq(l, "condition-result")) {
                        int b;

                        b = parse_boolean(v);
                        if (b < 0)
                                log_debug("Failed to parse condition result value %s", v);
                        else
                                u->condition_result = b;

                        continue;

                } else if (streq(l, "transient")) {
                        int b;

                        b = parse_boolean(v);
                        if (b < 0)
                                log_debug("Failed to parse transient bool %s", v);
                        else
                                u->transient = b;

                        continue;
                } else if (streq(l, "cgroup")) {
                        char *s;

                        s = strdup(v);
                        if (!s)
                                return -ENOMEM;

                        free(u->cgroup_path);
                        u->cgroup_path = s;

                        assert(hashmap_put(u->manager->cgroup_unit, s, u) == 1);
                        continue;
                }

                if (rt) {
                        r = exec_runtime_deserialize_item(rt, u, l, v, fds);
                        if (r < 0)
                                return r;
                        if (r > 0)
                                continue;
                }

                r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds);
                if (r < 0)
                        return r;
        }
}

Project: systemd
File: unit.c

UnitActiveState unit_active_state(Unit *u) {
        assert(u);

        if (u->load_state == UNIT_MERGED)
                return unit_active_state(unit_follow_merge(u));

        /* After a reload it might happen that a unit is not correctly
         * loaded but still has a process around. That's why we won't
         * shortcut failed loading to UNIT_INACTIVE_FAILED. */

        return UNIT_VTABLE(u)->active_state(u);
}

Project: systemd
File: manager.c

void manager_flip_auto_status(Manager *m, bool enable) {
        if (enable) {
                if (m->show_status == SHOW_STATUS_AUTO)
                        manager_set_show_status(m, SHOW_STATUS_TEMPORARY);
        } else {
                if (m->show_status == SHOW_STATUS_TEMPORARY)
                        manager_set_show_status(m, SHOW_STATUS_AUTO);
        }
}

Project: systemd
File: manager.c

void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success) {

#ifdef HAVE_AUDIT
        char *p;
        int audit_fd;

        audit_fd = get_audit_fd();
        if (audit_fd < 0)
                return;

        /* Don't generate audit events if the service was already
         * started and we're just deserializing */
        if (m->n_reloading > 0)
                return;

        if (m->running_as != SYSTEMD_SYSTEM)
                return;

        if (u->type != UNIT_SERVICE)
                return;

        p = unit_name_to_prefix_and_instance(u->id);
        if (!p) {
                log_error_unit(u->id,
                               "Failed to allocate unit name for audit message: %s", strerror(ENOMEM));
                return;
        }

        if (audit_log_user_comm_message(audit_fd, type, "", p, NULL, NULL, NULL, success) < 0) {
                if (errno == EPERM) {
                        /* We aren't allowed to send audit messages?
                         * Then let's not retry again. */
                        close_audit_fd();
                } else
                        log_warning("Failed to send audit message: %m");
        }

        free(p);
#endif

}

Project: systemd
File: unit.c

UnitFileState unit_get_unit_file_state(Unit *u) {
        assert(u);

        if (u->unit_file_state < 0 && u->fragment_path)
                u->unit_file_state = unit_file_get_state(
                                u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER,
                                NULL, basename(u->fragment_path));

        return u->unit_file_state;
}

Project: systemd
File: manager.c

void manager_check_finished(Manager *m) {
        char userspace[FORMAT_TIMESPAN_MAX], initrd[FORMAT_TIMESPAN_MAX], kernel[FORMAT_TIMESPAN_MAX], sum[FORMAT_TIMESPAN_MAX];
        usec_t firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec;

        assert(m);

        if (m->n_running_jobs == 0)
                m->jobs_in_progress_event_source = sd_event_source_unref(m->jobs_in_progress_event_source);

        if (hashmap_size(m->jobs) > 0) {
                if (m->jobs_in_progress_event_source) {
                        uint64_t next = now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_WAIT_USEC;
                        sd_event_source_set_time(m->jobs_in_progress_event_source, next);
                }
                return;
        }

        manager_flip_auto_status(m, false);

        /* Notify Type=idle units that we are done now */
        m->idle_pipe_event_source = sd_event_source_unref(m->idle_pipe_event_source);
        manager_close_idle_pipe(m);

        /* Turn off confirm spawn now */
        m->confirm_spawn = false;

        if (dual_timestamp_is_set(&m->finish_timestamp))
                return;

        dual_timestamp_get(&m->finish_timestamp);

        if (m->running_as == SYSTEMD_SYSTEM && detect_container(NULL) <= 0) {

                /* Note that m->kernel_usec.monotonic is always at 0,
                 * and m->firmware_usec.monotonic and
                 * m->loader_usec.monotonic should be considered
                 * negative values. */

                firmware_usec = m->firmware_timestamp.monotonic - m->loader_timestamp.monotonic;
                loader_usec = m->loader_timestamp.monotonic - m->kernel_timestamp.monotonic;
                userspace_usec = m->finish_timestamp.monotonic - m->userspace_timestamp.monotonic;
                total_usec = m->firmware_timestamp.monotonic + m->finish_timestamp.monotonic;

                if (dual_timestamp_is_set(&m->initrd_timestamp)) {

                        kernel_usec = m->initrd_timestamp.monotonic - m->kernel_timestamp.monotonic;
                        initrd_usec = m->userspace_timestamp.monotonic - m->initrd_timestamp.monotonic;

                        if (!log_on_console())
                                log_struct(LOG_INFO,
                                           MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
                                           "KERNEL_USEC="USEC_FMT, kernel_usec,
                                           "INITRD_USEC="USEC_FMT, initrd_usec,
                                           "USERSPACE_USEC="USEC_FMT, userspace_usec,
                                           "MESSAGE=Startup finished in %s (kernel) + %s (initrd) + %s (userspace) = %s.",
                                           format_timespan(kernel, sizeof(kernel), kernel_usec, USEC_PER_MSEC),
                                           format_timespan(initrd, sizeof(initrd), initrd_usec, USEC_PER_MSEC),
                                           format_timespan(userspace, sizeof(userspace), userspace_usec, USEC_PER_MSEC),
                                           format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC),
                                           NULL);
                } else {
                        kernel_usec = m->userspace_timestamp.monotonic - m->kernel_timestamp.monotonic;
                        initrd_usec = 0;

                        if (!log_on_console())
                                log_struct(LOG_INFO,
                                           MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
                                           "KERNEL_USEC="USEC_FMT, kernel_usec,
                                           "USERSPACE_USEC="USEC_FMT, userspace_usec,
                                           "MESSAGE=Startup finished in %s (kernel) + %s (userspace) = %s.",
                                           format_timespan(kernel, sizeof(kernel), kernel_usec, USEC_PER_MSEC),
                                           format_timespan(userspace, sizeof(userspace), userspace_usec, USEC_PER_MSEC),
                                           format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC),
                                           NULL);
                }
        } else {
                firmware_usec = loader_usec = initrd_usec = kernel_usec = 0;
                total_usec = userspace_usec = m->finish_timestamp.monotonic - m->userspace_timestamp.monotonic;

                if (!log_on_console())
                        log_struct(LOG_INFO,
                                   MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
                                   "USERSPACE_USEC="USEC_FMT, userspace_usec,
                                   "MESSAGE=Startup finished in %s.",
                                   format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC),
                                   NULL);
        }

        bus_manager_send_finished(m, firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec);

        sd_notifyf(false,
                   "READY=1\nSTATUS=Startup finished in %s.",
                   format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC));
}

Project: systemd
File: manager.c

void manager_set_show_status(Manager *m, ShowStatus mode) {
        assert(m);
        assert(IN_SET(mode, SHOW_STATUS_AUTO, SHOW_STATUS_NO, SHOW_STATUS_YES, SHOW_STATUS_TEMPORARY));

        if (m->running_as != SYSTEMD_SYSTEM)
                return;

        m->show_status = mode;

        if (mode > 0)
                touch("/run/systemd/show-status");
        else
                unlink("/run/systemd/show-status");
}

Project: systemd
File: manager.c

int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit) {
        int i;

        assert(m);

        for (i = 0; i < RLIMIT_NLIMITS; i++) {
                if (!default_rlimit[i])
                        continue;

                m->rlimit[i] = newdup(struct rlimit, default_rlimit[i], 1);
                if (!m->rlimit[i])
                        return -ENOMEM;
        }

        return 0;
}

Project: systemd
File: unit.c

bool unit_has_name(Unit *u, const char *name) {
        assert(u);
        assert(name);

        return !!set_get(u->names, (char*) name);
}

Project: systemd
File: unit.c

CGroupContext *unit_get_cgroup_context(Unit *u) {
        size_t offset;

        offset = UNIT_VTABLE(u)->cgroup_context_offset;
        if (offset <= 0)
                return NULL;

        return (CGroupContext*) ((uint8_t*) u + offset);
}

Project: systemd
File: unit.c

Unit *unit_new(Manager *m, size_t size) {
        Unit *u;

        assert(m);
        assert(size >= sizeof(Unit));

        u = malloc0(size);
        if (!u)
                return NULL;

        u->names = set_new(string_hash_func, string_compare_func);
        if (!u->names) {
                free(u);
                return NULL;
        }

        u->manager = m;
        u->type = _UNIT_TYPE_INVALID;
        u->deserialized_job = _JOB_TYPE_INVALID;
        u->default_dependencies = true;
        u->unit_file_state = _UNIT_FILE_STATE_INVALID;
        u->on_failure_job_mode = JOB_REPLACE;

        return u;
}

Project: systemd
File: unit.c

void unit_trigger_notify(Unit *u) {
        Unit *other;
        Iterator i;

        assert(u);

        SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i)
                if (UNIT_VTABLE(other)->trigger_notify)
                        UNIT_VTABLE(other)->trigger_notify(other, u);
}

Project: systemd
File: manager.c

static void invoke_sigchld_event(Manager *m, Unit *u, siginfo_t *si) {
        assert(m);
        assert(u);
        assert(si);

        log_debug_unit(u->id, "Child "PID_FMT" belongs to %s", si->si_pid, u->id);

        unit_unwatch_pid(u, si->si_pid);
        UNIT_VTABLE(u)->sigchld_event(u, si->si_pid, si->si_code, si->si_status);
}

Project: systemd
File: manager.c

static void manager_print_jobs_in_progress(Manager *m) {
        _cleanup_free_ char *job_of_n = NULL;
        Iterator i;
        Job *j;
        unsigned counter = 0, print_nr;
        char cylon[6 + CYLON_BUFFER_EXTRA + 1];
        unsigned cylon_pos;
        char time[FORMAT_TIMESPAN_MAX], limit[FORMAT_TIMESPAN_MAX] = "no limit";
        uint64_t x;

        assert(m);

        manager_flip_auto_status(m, true);

        print_nr = (m->jobs_in_progress_iteration / JOBS_IN_PROGRESS_PERIOD_DIVISOR) % m->n_running_jobs;

        HASHMAP_FOREACH(j, m->jobs, i)
                if (j->state == JOB_RUNNING && counter++ == print_nr)
                        break;

        /* m->n_running_jobs must be consistent with the contents of m->jobs,
         * so the above loop must have succeeded in finding j. */
        assert(counter == print_nr + 1);
        assert(j);

        cylon_pos = m->jobs_in_progress_iteration % 14;
        if (cylon_pos >= 8)
                cylon_pos = 14 - cylon_pos;
        draw_cylon(cylon, sizeof(cylon), 6, cylon_pos);

        m->jobs_in_progress_iteration++;

        if (m->n_running_jobs > 1)
                if (asprintf(&job_of_n, "(%u of %u) ", counter, m->n_running_jobs) < 0)
                        job_of_n = NULL;

        format_timespan(time, sizeof(time), now(CLOCK_MONOTONIC) - j->begin_usec, 1*USEC_PER_SEC);
        if (job_get_timeout(j, &x) > 0)
                format_timespan(limit, sizeof(limit), x - j->begin_usec, 1*USEC_PER_SEC);

        manager_status_printf(m, true, cylon,
                              "%sA %s job is running for %s (%s / %s)",
                              strempty(job_of_n),
                              job_type_to_string(j->type),
                              unit_description(j->unit),
                              time, limit);

}

Project: systemd
File: manager.c

static int manager_setup_kdbus(Manager *m) {
#ifdef ENABLE_KDBUS
        _cleanup_free_ char *p = NULL;
#endif

#ifdef ENABLE_KDBUS
        assert(m);

        if (m->kdbus_fd >= 0)
                return 0;

        m->kdbus_fd = bus_kernel_create_bus(m->running_as == SYSTEMD_SYSTEM ? "system" : "user", m->running_as == SYSTEMD_SYSTEM, &p);
        if (m->kdbus_fd < 0) {
                log_debug("Failed to set up kdbus: %s", strerror(-m->kdbus_fd));
                return m->kdbus_fd;
        }

        log_debug("Successfully set up kdbus on %s", p);

        /* Create the namespace directory here, so that the contents
         * of that directory is not visible to non-root users. This is
         * necessary to ensure that users cannot get access to busses
         * of virtualized users when no UID namespacing is used. */
        if (m->running_as == SYSTEMD_SYSTEM)
                mkdir_p_label("/dev/kdbus/domain", 0700);
#endif

        return 0;
}

Project: systemd
File: unit.c

void unit_unwatch_bus_name(Unit *u, const char *name) {
        assert(u);
        assert(name);

        hashmap_remove_value(u->manager->watch_bus, name, u);
}

Project: systemd
File: unit.c

static void merge_names(Unit *u, Unit *other) {
        char *t;
        Iterator i;

        assert(u);
        assert(other);

        complete_move(&u->names, &other->names);

        set_free_free(other->names);
        other->names = NULL;
        other->id = NULL;

        SET_FOREACH(t, u->names, i)
                assert_se(hashmap_replace(u->manager->units, t, u) == 0);
}

Project: systemd
File: unit.c

void unit_add_to_dbus_queue(Unit *u) {
        assert(u);
        assert(u->type != _UNIT_TYPE_INVALID);

        if (u->load_state == UNIT_STUB || u->in_dbus_queue)
                return;

        /* Shortcut things if nobody cares */
        if (set_isempty(u->manager->subscribed)) {
                u->sent_dbus_new_signal = true;
                return;
        }

        LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u);
        u->in_dbus_queue = true;
}

Project: systemd
File: manager.c

int manager_open_serialization(Manager *m, FILE **_f) {
        const char *path;
        int fd = -1;
        FILE *f;

        assert(_f);

        path = m->running_as == SYSTEMD_SYSTEM ? "/run/systemd" : "/tmp";
        fd = open_tmpfile(path, O_RDWR|O_CLOEXEC);
        if (fd < 0)
                return -errno;

        log_debug("Serializing state to %s", path);

        f = fdopen(fd, "w+");
        if (!f) {
                close_nointr_nofail(fd);
                return -errno;
        }

        *_f = f;

        return 0;
}

Project: systemd
File: unit.c

void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) {
        Manager *m;
        bool unexpected;

        assert(u);
        assert(os < _UNIT_ACTIVE_STATE_MAX);
        assert(ns < _UNIT_ACTIVE_STATE_MAX);

        /* Note that this is called for all low-level state changes,
         * even if they might map to the same high-level
         * UnitActiveState! That means that ns == os is OK an expected
         * behavior here. For example: if a mount point is remounted
         * this function will be called too! */

        m = u->manager;

        if (m->n_reloading <= 0) {
                dual_timestamp ts;

                dual_timestamp_get(&ts);

                if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns))
                        u->inactive_exit_timestamp = ts;
                else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns))
                        u->inactive_enter_timestamp = ts;

                if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns))
                        u->active_enter_timestamp = ts;
                else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns))
                        u->active_exit_timestamp = ts;
        }

        if (UNIT_IS_INACTIVE_OR_FAILED(ns))
                unit_destroy_cgroup(u);

        /* Note that this doesn't apply to RemainAfterExit services exiting
         * sucessfully, since there's no change of state in that case. Which is
         * why it is handled in service_set_state() */
        if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) {
                ExecContext *ec = unit_get_exec_context(u);
                if (ec && exec_context_may_touch_console(ec)) {
                        if (UNIT_IS_INACTIVE_OR_FAILED(ns)) {
                                m->n_on_console --;

                                if (m->n_on_console == 0)
                                        /* unset no_console_output flag, since the console is free */
                                        m->no_console_output = false;
                        } else
                                m->n_on_console ++;
                }
        }

        if (u->job) {
                unexpected = false;

                if (u->job->state == JOB_WAITING)

                        /* So we reached a different state for this
                         * job. Let's see if we can run it now if it
                         * failed previously due to EAGAIN. */
                        job_add_to_run_queue(u->job);

                /* Let's check whether this state change constitutes a
                 * finished job, or maybe contradicts a running job and
                 * hence needs to invalidate jobs. */

                switch (u->job->type) {

                case JOB_START:
                case JOB_VERIFY_ACTIVE:

                        if (UNIT_IS_ACTIVE_OR_RELOADING(ns))
                                job_finish_and_invalidate(u->job, JOB_DONE, true);
                        else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) {
                                unexpected = true;

                                if (UNIT_IS_INACTIVE_OR_FAILED(ns))
                                        job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true);
                        }

                        break;

                case JOB_RELOAD:
                case JOB_RELOAD_OR_START:

                        if (u->job->state == JOB_RUNNING) {
                                if (ns == UNIT_ACTIVE)
                                        job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true);
                                else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) {
                                        unexpected = true;

                                        if (UNIT_IS_INACTIVE_OR_FAILED(ns))
                                                job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true);
                                }
                        }

                        break;

                case JOB_STOP:
                case JOB_RESTART:
                case JOB_TRY_RESTART:

                        if (UNIT_IS_INACTIVE_OR_FAILED(ns))
                                job_finish_and_invalidate(u->job, JOB_DONE, true);
                        else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) {
                                unexpected = true;
                                job_finish_and_invalidate(u->job, JOB_FAILED, true);
                        }

                        break;

                default:
                        assert_not_reached("Job type unknown");
                }

        } else
                unexpected = true;

        if (m->n_reloading <= 0) {

                /* If this state change happened without being
                 * requested by a job, then let's retroactively start
                 * or stop dependencies. We skip that step when
                 * deserializing, since we don't want to create any
                 * additional jobs just because something is already
                 * activated. */

                if (unexpected) {
                        if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns))
                                retroactively_start_dependencies(u);
                        else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns))
                                retroactively_stop_dependencies(u);
                }

                /* stop unneeded units regardless if going down was expected or not */
                if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns))
                        check_unneeded_dependencies(u);

                if (ns != os && ns == UNIT_FAILED) {
                        log_notice_unit(u->id,
                                        "Unit %s entered failed state.", u->id);
                        unit_start_on_failure(u);
                }
        }

        /* Some names are special */
        if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) {

                if (unit_has_name(u, SPECIAL_DBUS_SERVICE))
                        /* The bus just might have become available,
                         * hence try to connect to it, if we aren't
                         * yet connected. */
                        bus_init(m, true);

                if (u->type == UNIT_SERVICE &&
                    !UNIT_IS_ACTIVE_OR_RELOADING(os) &&
                    m->n_reloading <= 0) {
                        /* Write audit record if we have just finished starting up */
                        manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true);
                        u->in_audit = true;
                }

                if (!UNIT_IS_ACTIVE_OR_RELOADING(os))
                        manager_send_unit_plymouth(m, u);

        } else {

                /* We don't care about D-Bus here, since we'll get an
                 * asynchronous notification for it anyway. */

                if (u->type == UNIT_SERVICE &&
                    UNIT_IS_INACTIVE_OR_FAILED(ns) &&
                    !UNIT_IS_INACTIVE_OR_FAILED(os) &&
                    m->n_reloading <= 0) {

                        /* Hmm, if there was no start record written
                         * write it now, so that we always have a nice
                         * pair */
                        if (!u->in_audit) {
                                manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE);

                                if (ns == UNIT_INACTIVE)
                                        manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true);
                        } else
                                /* Write audit record if we have just finished shutting down */
                                manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE);

                        u->in_audit = false;
                }
        }

        manager_recheck_journal(m);
        unit_trigger_notify(u);

        /* Maybe we finished startup and are now ready for being
         * stopped because unneeded? */
        if (u->manager->n_reloading <= 0)
                unit_check_unneeded(u);

        unit_add_to_dbus_queue(u);
        unit_add_to_gc_queue(u);
}

Project: systemd
File: unit.c

int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
        Unit *other;
        int r;
        _cleanup_free_ char *s = NULL;

        assert(u);
        assert(name || path);

        if (!(name = resolve_template(u, name, path, &s)))
                return -ENOMEM;

        if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0)
                return r;

        r = unit_add_two_dependencies(u, d, e, other, add_reference);

        return r;
}