Repository: valkey-io/valkey
File: src/cluster_legacy.c (C)

Code before:
        return C_ERR;
    }
    /* Lock acquired: leak the 'fd' by not closing it until shutdown time, so that
     * we'll retain the lock to the file as long as the process exists.
     *
     * After fork, the child process will get the fd opened by the parent process,
     * we need save `fd` to `cluster_config_file_lock_fd`, so that in serverFork(),
     * it will be closed in the child process.
     * If it is not closed, when the main process is killed -9, but the child process
     * (valkey-aof-rewrite) is still alive, the fd(lock) will still be held by the
     * child process, and the main process will fail to get lock, means fail to start. */
    server.cluster_config_file_lock_fd = fd;
#else
    UNUSED(filename);
#endif /* __sun */

    return C_OK;
}

/* Derives our ports to be announced in the cluster bus. */
void deriveAnnouncedPorts(
    int *announced_tcp_port,
    int *announced_tls_port,
    int *announced_cport,
    int *announced_client_tcp_port,
    int *announced_client_tls_port) {
    /* Config overriding announced ports. */
    *announced_tcp_port = server.cluster_announce_port ? server.cluster_announce_port : server.port;
    *announced_tls_port = server.cluster_announce_tls_port ? server.cluster_announce_tls_port : server.tls_port;
    /* Derive cluster bus port. */
    if (server.cluster_announce_bus_port) {
        *announced_cport = server.cluster_announce_bus_port;
    } else if (server.cluster_port) {
        *announced_cport = server.cluster_port;
    } else {
        *announced_cport = defaultClientPort() + CLUSTER_PORT_INCR;
    }

    *announced_client_tcp_port = server.cluster_announce_client_port;
    *announced_client_tls_port = server.cluster_announce_client_tls_port;
}

/* Some flags (currently just the NOFAILOVER flag) may need to be updated
 * in the "myself" node based on the current configuration of the node,
 * that may change at runtime via CONFIG SET. This function changes the
 * set of flags in myself->flags accordingly. */
void clusterUpdateMyselfFlags(void) {
    if (!myself) return;
    int oldflags = myself->flags;
    int nofailover = server.cluster_replica_no_failover ? CLUSTER_NODE_NOFAILOVER : 0;
    myself->flags &= ~CLUSTER_NODE_NOFAILOVER;

Review comment (suggestion):
Clang-format accepts this too, I think:

```suggestion
void deriveAnnouncedPorts(int *announced_tcp_port,
                          int *announced_tls_port,
                          int *announced_cport,
                          int *announced_client_tcp_port,
                          int *announced_client_tls_port) {
```

I prefer it...

Code after:
     *
     * After fork, the child process will get the fd opened by the parent process,
     * we need save `fd` to `cluster_config_file_lock_fd`, so that in serverFork(),
     * it will be closed in the child process.
     * If it is not closed, when the main process is killed -9, but the child process
     * (valkey-aof-rewrite) is still alive, the fd(lock) will still be held by the
     * child process, and the main process will fail to get lock, means fail to start. */
    server.cluster_config_file_lock_fd = fd;
#else
    UNUSED(filename);
#endif /* __sun */

    return C_OK;
}

/* Derives our ports to be announced in the cluster bus. */
void deriveAnnouncedPorts(int *announced_tcp_port,
                          int *announced_tls_port,
                          int *announced_cport,
                          int *announced_client_tcp_port,
                          int *announced_client_tls_port) {
    /* Config overriding announced ports. */
    *announced_tcp_port = server.cluster_announce_port ? server.cluster_announce_port : server.port;
    *announced_tls_port = server.cluster_announce_tls_port ? server.cluster_announce_tls_port : server.tls_port;
    /* Derive cluster bus port. */
    if (server.cluster_announce_bus_port) {
        *announced_cport = server.cluster_announce_bus_port;
    } else if (server.cluster_port) {
        *announced_cport = server.cluster_port;
    } else {
        *announced_cport = defaultClientPort() + CLUSTER_PORT_INCR;
    }

    *announced_client_tcp_port = server.cluster_announce_client_port;
    *announced_client_tls_port = server.cluster_announce_client_tls_port;
}

/* Some flags (currently just the NOFAILOVER flag) may need to be updated
 * in the "myself" node based on the current configuration of the node,
 * that may change at runtime via CONFIG SET. This function changes the
 * set of flags in myself->flags accordingly. */
void clusterUpdateMyselfFlags(void) {
    if (!myself) return;
    int oldflags = myself->flags;
    int nofailover = server.cluster_replica_no_failover ? CLUSTER_NODE_NOFAILOVER : 0;
    myself->flags &= ~CLUSTER_NODE_NOFAILOVER;
    myself->flags |= nofailover;
    myself->flags |= CLUSTER_NODE_EXTENSIONS_SUPPORTED |
                     CLUSTER_NODE_LIGHT_HDR_PUBLISH_SUPPORTED |
                     CLUSTER_NODE_LIGHT_HDR_MODULE_SUPPORTED;
    if (myself->flags != oldflags) {