/**
Connects to the fish socket and starts listening for connections
*/
static int get_socket()
{
int s, len, doexit = 0;
int exitcode = EXIT_FAILURE;
struct sockaddr_un local;
char *sock_name = get_socket_filename();
/*
Start critical section protected by lock
*/
char *lockfile = acquire_socket_lock( sock_name );
if( lockfile == NULL )
{
debug( 0, L"Unable to obtain lock on socket, exiting" );
exit( EXIT_FAILURE );
}
debug( 4, L"Acquired lockfile: %s", lockfile );
local.sun_family = AF_UNIX;
strcpy( local.sun_path, sock_name );
len = sizeof(local);
debug(1, L"Connect to socket at %s", sock_name);
if( ( s = socket( AF_UNIX, SOCK_STREAM, 0 ) ) == -1 )
{
wperror( L"socket" );
doexit = 1;
goto unlock;
}
/*
First check whether the socket has been opened by another fishd;
if so, exit with success status
*/
if( connect( s, (struct sockaddr *)&local, len ) == 0 )
{
debug( 1, L"Socket already exists, exiting" );
doexit = 1;
exitcode = 0;
goto unlock;
}
unlink( local.sun_path );
if( bind( s, (struct sockaddr *)&local, len ) == -1 )
{
wperror( L"bind" );
doexit = 1;
goto unlock;
}
if( fcntl( s, F_SETFL, O_NONBLOCK ) != 0 )
{
wperror( L"fcntl" );
close( s );
doexit = 1;
} else if( listen( s, 64 ) == -1 )
{
wperror( L"listen" );
doexit = 1;
}
unlock:
(void)unlink( lockfile );
debug( 4, L"Released lockfile: %s", lockfile );
/*
End critical section protected by lock
*/
free( lockfile );
free( sock_name );
if( doexit )
{
exit( exitcode );
}
return s;
}
/**
Connects to the fish socket and starts listening for connections
*/
static int get_socket(void)
{
// Cygwin has random problems involving sockets. When using Cygwin,
// allow 20 attempts at making socket correctly.
#ifdef __CYGWIN__
int attempts = 0;
repeat:
attempts += 1;
#endif
int s, len, doexit = 0;
int exitcode = EXIT_FAILURE;
struct sockaddr_un local;
const std::string sock_name = get_socket_filename();
/*
Start critical section protected by lock
*/
std::string lockfile;
if (! acquire_socket_lock(sock_name, &lockfile))
{
debug(0, L"Unable to obtain lock on socket, exiting");
exit(EXIT_FAILURE);
}
debug(4, L"Acquired lockfile: %s", lockfile.c_str());
local.sun_family = AF_UNIX;
strcpy(local.sun_path, sock_name.c_str());
len = sizeof(local);
debug(1, L"Connect to socket at %s", sock_name.c_str());
if ((s = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
{
wperror(L"socket");
doexit = 1;
goto unlock;
}
/*
First check whether the socket has been opened by another fishd;
if so, exit with success status
*/
if (connect(s, (struct sockaddr *)&local, len) == 0)
{
debug(1, L"Socket already exists, exiting");
doexit = 1;
exitcode = 0;
goto unlock;
}
unlink(local.sun_path);
if (bind(s, (struct sockaddr *)&local, len) == -1)
{
wperror(L"bind");
doexit = 1;
goto unlock;
}
if (make_fd_nonblocking(s) != 0)
{
wperror(L"fcntl");
close(s);
doexit = 1;
}
else if (listen(s, 64) == -1)
{
wperror(L"listen");
doexit = 1;
}
unlock:
(void)unlink(lockfile.c_str());
debug(4, L"Released lockfile: %s", lockfile.c_str());
/*
End critical section protected by lock
*/
if (doexit)
{
// If Cygwin, only allow normal quit when made lots of attempts.
#ifdef __CYGWIN__
if (exitcode && attempts < 20) goto repeat;
#endif
exit_without_destructors(exitcode);
}
return s;
}