5 * Gonzalo Paniagua Javier (gonzalo@novell.com
7 * (C) 2006 Novell, Inc.
9 * Permission is hereby granted, free of charge, to any person obtaining
10 * a copy of this software and associated documentation files (the
11 * "Software"), to deal in the Software without restriction, including
12 * without limitation the rights to use, copy, modify, merge, publish,
13 * distribute, sublicense, and/or sell copies of the Software, and to
14 * permit persons to whom the Software is furnished to do so, subject to
15 * the following conditions:
17 * The above copyright notice and this permission notice shall be
18 * included in all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
33 #include <sys/types.h>
44 #ifdef HAVE_SYS_TIME_H
48 #ifdef HAVE_SYS_WAIT_H
59 /* windows pipe api details: http://msdn2.microsoft.com/en-us/library/edze9h7e(VS.80).aspx */
60 #define pipe(x) _pipe(x, 256, 0)
63 #define set_error(msg, ...) do { if (error != NULL) *error = g_error_new (G_LOG_DOMAIN, 1, msg, __VA_ARGS__); } while (0)
64 #define set_error_cond(cond,msg, ...) do { if ((cond) && error != NULL) *error = g_error_new (G_LOG_DOMAIN, 1, msg, __VA_ARGS__); } while (0)
65 #define set_error_status(status,msg, ...) do { if (error != NULL) *error = g_error_new (G_LOG_DOMAIN, status, msg, __VA_ARGS__); } while (0)
66 #define NO_INTR(var,cmd) do { (var) = (cmd); } while ((var) == -1 && errno == EINTR)
67 #define CLOSE_PIPE(p) do { close (p [0]); close (p [1]); } while (0)
69 #if defined(__APPLE__) && !defined (__arm__)
70 /* Apple defines this in crt_externs.h but doesn't provide that header for
71 * arm-apple-darwin9. We'll manually define the symbol on Apple as it does
72 * in fact exist on all implementations (so far)
74 gchar ***_NSGetEnviron();
75 #define environ (*_NSGetEnviron())
76 #elif defined(_MSC_VER)
77 /* MS defines this in stdlib.h */
79 extern char **environ;
83 safe_read (int fd, gchar *buffer, gint count, GError **error)
87 NO_INTR (res, read (fd, buffer, count));
88 set_error_cond (res == -1, "%s", "Error reading from pipe.");
93 read_pipes (int outfd, gchar **out_str, int errfd, gchar **err_str, GError **error)
101 gchar *buffer = NULL;
104 out_closed = (outfd < 0);
105 err_closed = (errfd < 0);
108 out = g_string_new ("");
113 err = g_string_new ("");
117 if (out_closed && err_closed)
121 #pragma warning(push)
122 #pragma warning(disable:4389)
126 if (!out_closed && outfd >= 0)
127 FD_SET (outfd, &rfds);
128 if (!err_closed && errfd >= 0)
129 FD_SET (errfd, &rfds);
135 res = select (MAX (outfd, errfd) + 1, &rfds, NULL, NULL, NULL);
138 buffer = g_malloc (1024);
139 if (!out_closed && FD_ISSET (outfd, &rfds)) {
140 nread = safe_read (outfd, buffer, 1024, error);
146 g_string_append_len (out, buffer, nread);
153 if (!err_closed && FD_ISSET (errfd, &rfds)) {
154 nread = safe_read (errfd, buffer, 1024, error);
160 g_string_append_len (err, buffer, nread);
167 } while (res > 0 || (res == -1 && errno == EINTR));
171 *out_str = g_string_free (out, FALSE);
174 *err_str = g_string_free (err, FALSE);
180 create_pipe (int *fds, GError **error)
182 if (pipe (fds) == -1) {
183 set_error ("%s", "Error creating pipe.");
190 g_spawn_command_line_sync (const gchar *command_line,
191 gchar **standard_output,
192 gchar **standard_error,
201 int stdout_pipe [2] = { -1, -1 };
202 int stderr_pipe [2] = { -1, -1 };
206 if (!g_shell_parse_argv (command_line, &argc, &argv, error))
209 if (standard_output && !create_pipe (stdout_pipe, error))
212 if (standard_error && !create_pipe (stderr_pipe, error)) {
213 if (standard_output) {
214 CLOSE_PIPE (stdout_pipe);
223 if (standard_output) {
224 close (stdout_pipe [0]);
225 dup2 (stdout_pipe [1], STDOUT_FILENO);
228 if (standard_error) {
229 close (stderr_pipe [0]);
230 dup2 (stderr_pipe [1], STDERR_FILENO);
232 for (i = getdtablesize () - 1; i >= 3; i--)
235 /* G_SPAWN_SEARCH_PATH is always enabled for g_spawn_command_line_sync */
236 if (!g_path_is_absolute (argv [0])) {
239 arg0 = g_find_program_in_path (argv [0]);
246 execv (argv [0], argv);
247 exit (1); /* TODO: What now? */
252 close (stdout_pipe [1]);
255 close (stderr_pipe [1]);
257 if (standard_output || standard_error) {
258 res = read_pipes (stdout_pipe [0], standard_output, stderr_pipe [0], standard_error, error);
260 waitpid (pid, &status, WNOHANG); /* avoid zombie */
265 NO_INTR (res, waitpid (pid, &status, 0));
267 /* TODO: What if error? */
268 if (WIFEXITED (status) && exit_status) {
269 *exit_status = WEXITSTATUS (status);
276 * This is the only use we have in mono/metadata
277 !g_spawn_async_with_pipes (NULL, (char**)addr_argv, NULL, G_SPAWN_SEARCH_PATH, NULL, NULL, &child_pid, &ch_in, &ch_out, NULL, NULL)
280 g_spawn_async_with_pipes (const gchar *working_directory,
284 GSpawnChildSetupFunc child_setup,
287 gint *standard_input,
288 gint *standard_output,
289 gint *standard_error,
296 int in_pipe [2] = { -1, -1 };
297 int out_pipe [2] = { -1, -1 };
298 int err_pipe [2] = { -1, -1 };
301 g_return_val_if_fail (argv != NULL, FALSE); /* Only mandatory arg */
303 if (!create_pipe (info_pipe, error))
306 if (standard_output && !create_pipe (out_pipe, error)) {
307 CLOSE_PIPE (info_pipe);
311 if (standard_error && !create_pipe (err_pipe, error)) {
312 CLOSE_PIPE (info_pipe);
313 CLOSE_PIPE (out_pipe);
317 if (standard_input && !create_pipe (in_pipe, error)) {
318 CLOSE_PIPE (info_pipe);
319 CLOSE_PIPE (out_pipe);
320 CLOSE_PIPE (err_pipe);
326 CLOSE_PIPE (info_pipe);
327 CLOSE_PIPE (out_pipe);
328 CLOSE_PIPE (err_pipe);
329 CLOSE_PIPE (in_pipe);
330 set_error ("%s", "Error in fork ()");
335 /* No zombie left behind */
336 if ((flags & G_SPAWN_DO_NOT_REAP_CHILD) == 0) {
341 exit (pid == -1 ? 1 : 0);
349 close (info_pipe [0]);
351 close (out_pipe [0]);
352 close (err_pipe [0]);
354 /* when exec* succeeds, we want to close this fd, which will return
355 * a 0 read on the parent. We're not supposed to keep it open forever.
356 * If exec fails, we still can write the error to it before closing.
358 fcntl (info_pipe [1], F_SETFD, FD_CLOEXEC);
360 if ((flags & G_SPAWN_DO_NOT_REAP_CHILD) == 0) {
362 NO_INTR (unused, write (info_pipe [1], &pid, sizeof (pid_t)));
365 if (working_directory && chdir (working_directory) == -1) {
367 NO_INTR (unused, write (info_pipe [1], &err, sizeof (int)));
371 if (standard_output) {
372 dup2 (out_pipe [1], STDOUT_FILENO);
373 } else if ((flags & G_SPAWN_STDOUT_TO_DEV_NULL) != 0) {
374 fd = open ("/dev/null", O_WRONLY);
375 dup2 (fd, STDOUT_FILENO);
378 if (standard_error) {
379 dup2 (err_pipe [1], STDERR_FILENO);
380 } else if ((flags & G_SPAWN_STDERR_TO_DEV_NULL) != 0) {
381 fd = open ("/dev/null", O_WRONLY);
382 dup2 (fd, STDERR_FILENO);
385 if (standard_input) {
386 dup2 (in_pipe [0], STDIN_FILENO);
387 } else if ((flags & G_SPAWN_CHILD_INHERITS_STDIN) == 0) {
388 fd = open ("/dev/null", O_RDONLY);
389 dup2 (fd, STDIN_FILENO);
392 if ((flags & G_SPAWN_LEAVE_DESCRIPTORS_OPEN) != 0) {
393 for (i = getdtablesize () - 1; i >= 3; i--)
397 actual_args = ((flags & G_SPAWN_FILE_AND_ARGV_ZERO) == 0) ? argv : argv + 1;
402 child_setup (user_data);
405 if (!g_path_is_absolute (arg0) || (flags & G_SPAWN_SEARCH_PATH) != 0) {
406 arg0 = g_find_program_in_path (argv [0]);
409 write (info_pipe [1], &err, sizeof (int));
414 execve (arg0, actual_args, envp);
415 write (info_pipe [1], &errno, sizeof (int));
418 } else if ((flags & G_SPAWN_DO_NOT_REAP_CHILD) == 0) {
420 /* Wait for the first child if two are created */
421 NO_INTR (w, waitpid (pid, &status, 0));
422 if (status == 1 || w == -1) {
423 CLOSE_PIPE (info_pipe);
424 CLOSE_PIPE (out_pipe);
425 CLOSE_PIPE (err_pipe);
426 CLOSE_PIPE (in_pipe);
427 set_error ("Error in fork (): %d", status);
431 close (info_pipe [1]);
433 close (out_pipe [1]);
434 close (err_pipe [1]);
436 if ((flags & G_SPAWN_DO_NOT_REAP_CHILD) == 0) {
438 NO_INTR (x, read (info_pipe [0], &pid, sizeof (pid_t))); /* if we read < sizeof (pid_t)... */
445 if (read (info_pipe [0], &status, sizeof (int)) != 0) {
446 close (info_pipe [0]);
448 close (out_pipe [1]);
449 close (err_pipe [1]);
450 set_error_status (status, "Error in exec (%d -> %s)", status, strerror (status));
454 close (info_pipe [0]);
456 *standard_input = in_pipe [1];
458 *standard_output = out_pipe [0];
460 *standard_error = err_pipe [0];