sock: fix decoding of struct ifreq.ifr_name

The ifr name fields of the ifreq structure might not be NUL terminated.
If the user makes an ioctl call where they aren't, then strace ends up
reading random content from its own stack.  Limit the printf lengths.

* sock.c (sock_ioctl): Add explicit length limits to ifr_name printfs.
sock: fix decoding of SIOCSIFNAME

The decoding of SIOCSIFNAME is incorrect.  It does not use
the ifr_index field to look things up, but ifr_newname.

* sock.c (sock_ioctl): Split out SIOCSIFNAME from SIOCGIFNAME and
display ifr_newname.
sock: decode SIOCSIFNAME on entering syscall

* sock.c (sock_ioctl): Handle SIOCSIFNAME on entering syscall.
Include <linux/ptrace.h> regardless of <sys/reg.h> existence

This fixes compilation with musl libc.
This approach was already used in process.c, so I assume it is safe.

* signal.c: Move [HAVE_LINUX_PTRACE_H] code out of [HAVE_SYS_REG_H] check.
* syscall.c: Likewise.
* util.c: Likewise.

Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Add a function for dumping iovec in msghdr used in sendmsg and recvmsg

Here is an example session:

    $ ./strace -e write=all ip link change dev enp0s25 mtu 1501 > /dev/null
    sendmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000}, msg_iov(1)=[{"(...
     * 40 bytes in buffer 0
     | 00000  28 00 00 00 10 00 05 00  d0 d9 aa 53 00 00 00 00  (..........S.... |
     | 00010  00 00 00 00 02 00 00 00  00 00 00 00 00 00 00 00  ................ |
     | 00020  08 00 04 00 dd 05 00 00                           ........         |
    ...

    $ ./strace -e read=all ip link show > /dev/null
    recvmsg(3, {msg_name(12)={sa_family=AF_NETLINK, pid=0, groups=00000000}, msg_iov(1)=[{"...
     * 8192 bytes in buffer 0
     | 00000  34 00 00 00 02 00 00 00  00 00 00 00 ff 23 00 00  4............#.. |
     | 00010  ff ff ff ff 20 00 00 00  10 00 05 00 00 00 00 00  .... ........... |
    ...

* defs.h (dumpiov_in_msghdr): New prototype.
* net.c (extractmsghdr): New function derived from printmsghdr.
(printmsghdr): Use extractmsghdr.
(dumpiov_in_msghdr): New function.
* syscall.c (dumpio) [HAVE_SENDMSG]: Call dumpiov_in_msghdr for recvmsg
and sendmsg syscalls.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
ioctlent.sh: update the list of directories exported by headers_install

* linux/ioctlent.sh: Add drm, mtd, rdma, video, and xen directories.
Filter out redundant ioctl entries early

For two ioctl entries with the same code, if one's name is a prefix
to another's name, keep the entry with a shorter name.  Filter out
redundant ioctl entries at ioctlsort stage so that distributed
ioctlent.h.in files will be already filtered.

* linux/ioctlsort.c (is_not_prefix): New function.
(main): Use it.
* linux/ioctlent-filter.awk: Remove.
* Makefile.am (EXTRA_DIST): Remove linux/ioctlent-filter.awk.
($(ioctlent_h)): Don't use linux/ioctlent-filter.awk.
Remove ioctl header file names from the executable

* defs.h (struct ioctlent): Remove "doth" field.
* Makefile.am ($(ioctlent_h)): Remove 1st field.
Update ioctl entries

* linux/ioctlent.h.in: Regenerate from v3.17 headers.
Implement Video4Linux video-input ioctls decoder

Introduce v4l2.c, a decoder for the arguments of the video-input subset
of the v4l2 ioctl's.  This is a combination of
- previous work by Peter Zotov <whitequark@whitequark.org>, found at
https://gist.githubusercontent.com/whitequark/1263207/raw/strace-4.6-v4l2-ioctls.patch
- previous work by William Manley <will@williammanley.net>, found at
http://marc.info/?l=strace&m=139395588520675
- forward port, additions and fixes by Philippe De Muyter <phdm@macqel.be>

As v4l2 is a moving target, I have made v4l2.c compilable with ancient
linux kernels by testing the availability of some macros.  It has been
succesfully compiled on linux 3.10, 3.1, 2.6.31 and 2.6.22, and
succesfully used on linux 3.10 with a camera device.

* configure.ac: Check for availabilty of V4L2_* enum constants.
* Makefile.am (strace_SOURCES): Add v4l2.c.
* defs.h (v4l2_ioctl): New prototype.
* ioctl.c (ioctl_decode): Use v4l2_ioctl.
* v4l2.c: New file.
* xlat/v4l2_*.in: New files.

Signed-off-by: Philippe De Muyter <phdm@macqel.be>
Cc: Peter Zotov <whitequark@whitequark.org>
Cc: William Manley <will@williammanley.net>
Dump details for Bluetooth socket operations

* configure.ac (AC_CHECK_HEADERS): Add bluetooth/bluetooth.h.
* xlat/bt_protocols.in: New file.
* net.c [AF_BLUETOOTH && HAVE_BLUETOOTH_BLUETOOTH_H]: Include bluetooth
headers.
[PF_BLUETOOTH && HAVE_BLUETOOTH_BLUETOOTH_H]: Include "xlat/bt_protocols.h".
(printsock) [AF_BLUETOOTH && HAVE_BLUETOOTH_BLUETOOTH_H]: Dump details
for AF_BLUETOOTH sockets.
(sys_socket) [PF_BLUETOOTH && HAVE_BLUETOOTH_BLUETOOTH_H]: Decode
protocol for PF_BLUETOOTH sockets.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Makefile.am: look for ioctl definitions in the kernel build tree by default

While most of ioctl-related kernel headers are now exported by kernel's
headers_install, some are still modules_install only.  The kernel's
headers installed into /usr/include/ are usually headers_install'ed and
therefore don't contain some internal headers we need.  The solution is
to look for modules_install'ed headers for the running kernel, and fall
back to old behavior if they aren't found.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
ioctlsort: rewrite build rules using noinst_PROGRAMS

* linux/ioctlsort.c: Rename to ioctlsort.c
* Makefile.am (EXTRA_DIST): Rename linux/ioctlsort.c to ioctlsort.c.
[MAINTAINER_MODE] (noinst_PROGRAMS): Add ioctlsort.
(ioctlsort_SOURCES): Add ioctlsort.c.
(nodist_ioctlsort_SOURCES): Add ioctls.h and ioctldefs.h.
(CLEANFILES): Add $(nodist_ioctlsort_SOURCES).
(ioctlsort.$(OBJEXT)): Likewise.
(ioctlsort): Remove.
Introduce a separate function to copy from msghdr32 to msghdr

This patch is an initial step for supporting "-e write=set" and
"-e read=set" option for sendmmsg and recvmmsg system calls.

Coverting a data of msghdr32 to msghdr is needed both for
{send,recv}msg and {send,recv}mmsg to decode parameters.
To share the copying code in both decoders, a separate
function named copy_from_msghdr32 is introduced.

* net.c [SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4]
(copy_from_msghdr32): New function.
(extractmsghdr) [SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4]: Use it.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Use the definition of struct mmsghdr if it is defined in build environment

mmsghrd structure type is defined locally in printmmsghdr function.

However, more functions will refer the definition in modifications for
supporting "-e write=set" and "-e read=set" option for sendmmsg and
recvmmsg system calls.

After this change, the system definition of struct mmsghdr will be used
if configure reports it is available, falling back to the old local
definition.

* configure.ac (AC_CHECK_TYPES): Add struct mmsghdr.
* net.c [!HAVE_STRUCT_MMSGHDR] (struct mmsghdr): Define.
(printmmsghdr): Use previously defined struct mmsghdr.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Add functions for dumping iovecs in mmsghdr used in sendmmsg and recvmmsg

This patch is similar to what I did in commit
02f9f6b386741a52f58e1b31ad4e7fff60781ef8.
That commit was for sendmsg and recvmsg system calls.
This one is for sendmmsg and recvmmsg system calls.

* defs.h (dumpiov_in_mmsghdr): New declaration.
* net.c (extractmmsghdr): New function derived from printmmsghdr.
(printmmsghdr): Use it.
(dumpiov_in_mmsghdr): New function.
* syscall.c (dumpio) [HAVE_SENDMSG]: Call dumpiov_in_mmsghdr
for recvmmsg and sendmmsg syscalls.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
tests: add a test for decoding and dumping of recvmmsg/sendmmsg

* configure (AC_CHECK_FUNCS): Add sendmmsg.
* tests/mmsg.c: New file.
* tests/mmsg.expected: New file.
* tests/mmsg.test: New test.
* tests/.gitignore: Add mmsg.
* tests/Makefile.am (CHECK_PROGRAMS): Add mmsg.
(TESTS): Add mmsg.test.
(EXTRA_DIST): Add mmsg.expected.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
stack trace support: fix check on symbol name presence

The output format of the stack trace is supposed to be different
depending on whether symbol names are available in the build.

However, the check only verified the validity of the pointer, not of the
string pointed to (which could be empty).

This commit fixes the check so that the original output:

mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x5e000
 > /lib/libc-2.10.1.so(_IO_file_doallocate+0x8c) [0x68a38]
 > /lib/libc-2.10.1.so(_IO_doallocbuf+0x6c) [0x78574]
 > /lib/libc-2.10.1.so(_IO_file_overflow+0x184) [0x7763c]
 > /lib/libc-2.10.1.so(_IO_file_xsputn+0x88) [0x76aac]
 > /lib/libc-2.10.1.so(_IO_puts+0xc8) [0x6b64c]
 > /bin/busybox(+0x0) [0x62c60]
 > /bin/busybox(+0x0) [0x4940]
 > /bin/busybox(+0x0) [0x499c]
 > /bin/busybox(+0x0) [0x4e08]
 > /lib/libc-2.10.1.so(__libc_init_first+0x30c) [0x1f84c]
 > /lib/libc-2.10.1.so(__libc_start_main+0xd8) [0x1f9f8]

becomes:

mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x5e000
 > /lib/libc-2.10.1.so(_IO_file_doallocate+0x8c) [0x68a38]
 > /lib/libc-2.10.1.so(_IO_doallocbuf+0x6c) [0x78574]
 > /lib/libc-2.10.1.so(_IO_file_overflow+0x184) [0x7763c]
 > /lib/libc-2.10.1.so(_IO_file_xsputn+0x88) [0x76aac]
 > /lib/libc-2.10.1.so(_IO_puts+0xc8) [0x6b64c]
 > /bin/busybox() [0x62c60]
 > /bin/busybox() [0x4940]
 > /bin/busybox() [0x499c]
 > /bin/busybox() [0x4e08]
 > /lib/libc-2.10.1.so(__libc_init_first+0x30c) [0x1f84c]
 > /lib/libc-2.10.1.so(__libc_start_main+0xd8) [0x1f9f8]

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Acked-by: Masatake YAMATO <yamato@redhat.com>
hppa: update error codes and signal numbers

There are two important changes in here:

1. EWOULDBLOCK has been up to kernel 3.14 errorcode #246. Since hppa
folks had problems with EWOULDBLOCK != EAGAIN, this was changed in
kernel 3.14.

2. Starting with kernel 3.18, hppa folks changed some signal numbers in
such a way that we end up with SIGRTMIN == 32, which brings hppa in sync
with other linux ports.

Both were incompatible changes which basically broke hppa ABI, but since
they have been merged into the kernel, we have to follow.
Decode open's O_TMPFILE

* xlat/open_mode_flags.in: Add O_TMPFILE definition.