void* sendChildOutputToSyslogThread(void *p) {
int error = EXIT_SUCCESS;
sigset_t blockedSignalsMask;
outputToSyslogParam *params = (outputToSyslogParam*) p;
char buffer[MAXLINE];
ssize_t n;
sigemptyset(&blockedSignalsMask);
sigaddset(&blockedSignalsMask, SIGCHLD);
error = pthread_sigmask(SIG_BLOCK, &blockedSignalsMask, NULL);
if (error != 0) {
WARNING_MSG("pthread_sigmask error %d (%m)", error);
}
while ((n = read(params->pipe, buffer, sizeof (buffer))) > 0) {
buffer[n] = '\0';
DEBUG_VAR(buffer, "%s");
__syslogex_pid_chk(params->pid, params->level, -1, buffer);
}
if (n != 0) {
const int error = errno;
ERROR_MSG("read from %d error %d (%m)", params->pipe, error);
}
CLOSE_PIPE(params->pipe);
return NULL;
}
static inline int execChild(const char *file, char *argv[], int stdoutWritePipe, int stderrWritePipe) {
int error = EXIT_SUCCESS;
if (dup2(stdoutWritePipe, STDOUT_FILENO) != -1) { /* close stdout and redirect it to the pipe */
if (dup2(stderrWritePipe, STDERR_FILENO) != -1) { /* close stderr and redirect it to the pipe */
//DEBUG_VAR(file,"%s");
//DEBUG_VAR(argv[0],"%s");
//usleep(500);
if (execvp(file, argv)) {
error = errno;
ERROR_MSG("execvp error %d (%m)", error);
}
} else {
int error = errno;
ERROR_MSG("dup2 stderr error %d (%m)", error);
}
} else {
int error = errno;
ERROR_MSG("dup2 stdout error %d (%m)", error);
}
CLOSE_PIPE(stdoutWritePipe);
CLOSE_PIPE(stderrWritePipe);
return error;
}
/*
* This is the only use we have in mono/metadata
!g_spawn_async_with_pipes (NULL, (char**)addr_argv, NULL, G_SPAWN_SEARCH_PATH, NULL, NULL, &child_pid, &ch_in, &ch_out, NULL, NULL)
*/
gboolean
g_spawn_async_with_pipes (const gchar *working_directory,
gchar **argv,
gchar **envp,
GSpawnFlags flags,
GSpawnChildSetupFunc child_setup,
gpointer user_data,
GPid *child_pid,
gint *standard_input,
gint *standard_output,
gint *standard_error,
GError **error)
{
#ifdef G_OS_WIN32
#else
pid_t pid;
int info_pipe [2];
int in_pipe [2] = { -1, -1 };
int out_pipe [2] = { -1, -1 };
int err_pipe [2] = { -1, -1 };
int status;
g_return_val_if_fail (argv != NULL, FALSE); /* Only mandatory arg */
if (!create_pipe (info_pipe, error))
return FALSE;
if (standard_output && !create_pipe (out_pipe, error)) {
CLOSE_PIPE (info_pipe);
return FALSE;
}
if (standard_error && !create_pipe (err_pipe, error)) {
CLOSE_PIPE (info_pipe);
CLOSE_PIPE (out_pipe);
return FALSE;
}
if (standard_input && !create_pipe (in_pipe, error)) {
CLOSE_PIPE (info_pipe);
CLOSE_PIPE (out_pipe);
CLOSE_PIPE (err_pipe);
return FALSE;
}
pid = fork ();
if (pid == -1) {
CLOSE_PIPE (info_pipe);
CLOSE_PIPE (out_pipe);
CLOSE_PIPE (err_pipe);
CLOSE_PIPE (in_pipe);
set_error ("%s", "Error in fork ()");
return FALSE;
}
if (pid == 0) {
/* No zombie left behind */
if ((flags & G_SPAWN_DO_NOT_REAP_CHILD) == 0) {
pid = fork ();
}
if (pid != 0) {
exit (pid == -1 ? 1 : 0);
} else {
gint i;
int fd;
gchar *arg0;
gchar **actual_args;
gint unused;
close (info_pipe [0]);
close (in_pipe [1]);
close (out_pipe [0]);
close (err_pipe [0]);
/* when exec* succeeds, we want to close this fd, which will return
* a 0 read on the parent. We're not supposed to keep it open forever.
* If exec fails, we still can write the error to it before closing.
*/
fcntl (info_pipe [1], F_SETFD, FD_CLOEXEC);
if ((flags & G_SPAWN_DO_NOT_REAP_CHILD) == 0) {
pid = getpid ();
NO_INTR (unused, write_all (info_pipe [1], &pid, sizeof (pid_t)));
}
if (working_directory && chdir (working_directory) == -1) {
int err = errno;
NO_INTR (unused, write_all (info_pipe [1], &err, sizeof (int)));
exit (0);
}
if (standard_output) {
dup2 (out_pipe [1], STDOUT_FILENO);
} else if ((flags & G_SPAWN_STDOUT_TO_DEV_NULL) != 0) {
fd = open ("/dev/null", O_WRONLY);
dup2 (fd, STDOUT_FILENO);
}
if (standard_error) {
dup2 (err_pipe [1], STDERR_FILENO);
} else if ((flags & G_SPAWN_STDERR_TO_DEV_NULL) != 0) {
fd = open ("/dev/null", O_WRONLY);
dup2 (fd, STDERR_FILENO);
}
if (standard_input) {
dup2 (in_pipe [0], STDIN_FILENO);
} else if ((flags & G_SPAWN_CHILD_INHERITS_STDIN) == 0) {
fd = open ("/dev/null", O_RDONLY);
dup2 (fd, STDIN_FILENO);
}
if ((flags & G_SPAWN_LEAVE_DESCRIPTORS_OPEN) != 0) {
for (i = getdtablesize () - 1; i >= 3; i--)
close (i);
}
actual_args = ((flags & G_SPAWN_FILE_AND_ARGV_ZERO) == 0) ? argv : argv + 1;
if (envp == NULL)
envp = environ;
if (child_setup)
child_setup (user_data);
arg0 = argv [0];
if (!g_path_is_absolute (arg0) || (flags & G_SPAWN_SEARCH_PATH) != 0) {
arg0 = g_find_program_in_path (argv [0]);
if (arg0 == NULL) {
int err = ENOENT;
write_all (info_pipe [1], &err, sizeof (int));
exit (0);
}
}
execve (arg0, actual_args, envp);
write_all (info_pipe [1], &errno, sizeof (int));
exit (0);
}
} else if ((flags & G_SPAWN_DO_NOT_REAP_CHILD) == 0) {
int w;
/* Wait for the first child if two are created */
NO_INTR (w, waitpid (pid, &status, 0));
if (status == 1 || w == -1) {
CLOSE_PIPE (info_pipe);
CLOSE_PIPE (out_pipe);
CLOSE_PIPE (err_pipe);
CLOSE_PIPE (in_pipe);
set_error ("Error in fork (): %d", status);
return FALSE;
}
}
close (info_pipe [1]);
close (in_pipe [0]);
close (out_pipe [1]);
close (err_pipe [1]);
if ((flags & G_SPAWN_DO_NOT_REAP_CHILD) == 0) {
int x;
NO_INTR (x, read (info_pipe [0], &pid, sizeof (pid_t))); /* if we read < sizeof (pid_t)... */
}
if (child_pid) {
*child_pid = pid;
}
if (read (info_pipe [0], &status, sizeof (int)) != 0) {
close (info_pipe [0]);
close (in_pipe [0]);
close (out_pipe [1]);
close (err_pipe [1]);
set_error_status (status, "Error in exec (%d -> %s)", status, strerror (status));
return FALSE;
}
close (info_pipe [0]);
if (standard_input)
*standard_input = in_pipe [1];
if (standard_output)
*standard_output = out_pipe [0];
if (standard_error)
*standard_error = err_pipe [0];
#endif
return TRUE;
}
gboolean
g_spawn_command_line_sync (const gchar *command_line,
gchar **standard_output,
gchar **standard_error,
gint *exit_status,
GError **error)
{
#ifdef G_OS_WIN32
#else
pid_t pid;
gchar **argv;
gint argc;
int stdout_pipe [2] = { -1, -1 };
int stderr_pipe [2] = { -1, -1 };
int status;
int res;
if (!g_shell_parse_argv (command_line, &argc, &argv, error))
return FALSE;
if (standard_output && !create_pipe (stdout_pipe, error))
return FALSE;
if (standard_error && !create_pipe (stderr_pipe, error)) {
if (standard_output) {
CLOSE_PIPE (stdout_pipe);
}
return FALSE;
}
pid = fork ();
if (pid == 0) {
gint i;
if (standard_output) {
close (stdout_pipe [0]);
dup2 (stdout_pipe [1], STDOUT_FILENO);
}
if (standard_error) {
close (stderr_pipe [0]);
dup2 (stderr_pipe [1], STDERR_FILENO);
}
for (i = getdtablesize () - 1; i >= 3; i--)
close (i);
/* G_SPAWN_SEARCH_PATH is always enabled for g_spawn_command_line_sync */
if (!g_path_is_absolute (argv [0])) {
gchar *arg0;
arg0 = g_find_program_in_path (argv [0]);
if (arg0 == NULL) {
exit (1);
}
//g_free (argv [0]);
argv [0] = arg0;
}
execv (argv [0], argv);
exit (1); /* TODO: What now? */
}
g_strfreev (argv);
if (standard_output)
close (stdout_pipe [1]);
if (standard_error)
close (stderr_pipe [1]);
if (standard_output || standard_error) {
res = read_pipes (stdout_pipe [0], standard_output, stderr_pipe [0], standard_error, error);
if (res) {
waitpid (pid, &status, WNOHANG); /* avoid zombie */
return FALSE;
}
}
NO_INTR (res, waitpid (pid, &status, 0));
/* TODO: What if error? */
if (WIFEXITED (status) && exit_status) {
*exit_status = WEXITSTATUS (status);
}
#endif
return TRUE;
}
