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_SELECT_H
45 #include <sys/select.h>
48 #ifdef HAVE_SYS_TIME_H
52 #ifdef HAVE_SYS_WAIT_H
63 /* windows pipe api details: http://msdn2.microsoft.com/en-us/library/edze9h7e(VS.80).aspx */
64 #define pipe(x) _pipe(x, 256, 0)
67 #define set_error(msg, ...) do { if (error != NULL) *error = g_error_new (G_LOG_DOMAIN, 1, msg, __VA_ARGS__); } while (0)
68 #define set_error_cond(cond,msg, ...) do { if ((cond) && error != NULL) *error = g_error_new (G_LOG_DOMAIN, 1, msg, __VA_ARGS__); } while (0)
69 #define set_error_status(status,msg, ...) do { if (error != NULL) *error = g_error_new (G_LOG_DOMAIN, status, msg, __VA_ARGS__); } while (0)
70 #define NO_INTR(var,cmd) do { (var) = (cmd); } while ((var) == -1 && errno == EINTR)
71 #define CLOSE_PIPE(p) do { close (p [0]); close (p [1]); } while (0)
73 #if defined(__APPLE__) && !defined (__arm__)
74 /* Apple defines this in crt_externs.h but doesn't provide that header for
75 * arm-apple-darwin9. We'll manually define the symbol on Apple as it does
76 * in fact exist on all implementations (so far)
78 gchar ***_NSGetEnviron();
79 #define environ (*_NSGetEnviron())
80 #elif defined(_MSC_VER)
81 /* MS defines this in stdlib.h */
83 extern char **environ;
88 safe_read (int fd, gchar *buffer, gint count, GError **error)
92 NO_INTR (res, read (fd, buffer, count));
93 set_error_cond (res == -1, "%s", "Error reading from pipe.");
98 read_pipes (int outfd, gchar **out_str, int errfd, gchar **err_str, GError **error)
106 gchar *buffer = NULL;
109 out_closed = (outfd < 0);
110 err_closed = (errfd < 0);
113 out = g_string_new ("");
118 err = g_string_new ("");
122 if (out_closed && err_closed)
126 #pragma warning(push)
127 #pragma warning(disable:4389)
131 if (!out_closed && outfd >= 0)
132 FD_SET (outfd, &rfds);
133 if (!err_closed && errfd >= 0)
134 FD_SET (errfd, &rfds);
140 res = select (MAX (outfd, errfd) + 1, &rfds, NULL, NULL, NULL);
143 buffer = g_malloc (1024);
144 if (!out_closed && FD_ISSET (outfd, &rfds)) {
145 nread = safe_read (outfd, buffer, 1024, error);
151 g_string_append_len (out, buffer, nread);
158 if (!err_closed && FD_ISSET (errfd, &rfds)) {
159 nread = safe_read (errfd, buffer, 1024, error);
165 g_string_append_len (err, buffer, nread);
172 } while (res > 0 || (res == -1 && errno == EINTR));
176 *out_str = g_string_free (out, FALSE);
179 *err_str = g_string_free (err, FALSE);
185 create_pipe (int *fds, GError **error)
187 if (pipe (fds) == -1) {
188 set_error ("%s", "Error creating pipe.");
193 #endif /* G_OS_WIN32 */
196 write_all (int fd, const void *vbuf, size_t n)
198 const char *buf = (const char *) vbuf;
204 w = write (fd, buf + nwritten, n - nwritten);
205 } while (w == -1 && errno == EINTR);
211 } while (nwritten < n);
217 g_spawn_command_line_sync (const gchar *command_line,
218 gchar **standard_output,
219 gchar **standard_error,
228 int stdout_pipe [2] = { -1, -1 };
229 int stderr_pipe [2] = { -1, -1 };
233 if (!g_shell_parse_argv (command_line, &argc, &argv, error))
236 if (standard_output && !create_pipe (stdout_pipe, error))
239 if (standard_error && !create_pipe (stderr_pipe, error)) {
240 if (standard_output) {
241 CLOSE_PIPE (stdout_pipe);
250 if (standard_output) {
251 close (stdout_pipe [0]);
252 dup2 (stdout_pipe [1], STDOUT_FILENO);
255 if (standard_error) {
256 close (stderr_pipe [0]);
257 dup2 (stderr_pipe [1], STDERR_FILENO);
259 for (i = getdtablesize () - 1; i >= 3; i--)
262 /* G_SPAWN_SEARCH_PATH is always enabled for g_spawn_command_line_sync */
263 if (!g_path_is_absolute (argv [0])) {
266 arg0 = g_find_program_in_path (argv [0]);
273 execv (argv [0], argv);
274 exit (1); /* TODO: What now? */
279 close (stdout_pipe [1]);
282 close (stderr_pipe [1]);
284 if (standard_output || standard_error) {
285 res = read_pipes (stdout_pipe [0], standard_output, stderr_pipe [0], standard_error, error);
287 waitpid (pid, &status, WNOHANG); /* avoid zombie */
292 NO_INTR (res, waitpid (pid, &status, 0));
294 /* TODO: What if error? */
295 if (WIFEXITED (status) && exit_status) {
296 *exit_status = WEXITSTATUS (status);
303 * This is the only use we have in mono/metadata
304 !g_spawn_async_with_pipes (NULL, (char**)addr_argv, NULL, G_SPAWN_SEARCH_PATH, NULL, NULL, &child_pid, &ch_in, &ch_out, NULL, NULL)
307 g_spawn_async_with_pipes (const gchar *working_directory,
311 GSpawnChildSetupFunc child_setup,
314 gint *standard_input,
315 gint *standard_output,
316 gint *standard_error,
323 int in_pipe [2] = { -1, -1 };
324 int out_pipe [2] = { -1, -1 };
325 int err_pipe [2] = { -1, -1 };
328 g_return_val_if_fail (argv != NULL, FALSE); /* Only mandatory arg */
330 if (!create_pipe (info_pipe, error))
333 if (standard_output && !create_pipe (out_pipe, error)) {
334 CLOSE_PIPE (info_pipe);
338 if (standard_error && !create_pipe (err_pipe, error)) {
339 CLOSE_PIPE (info_pipe);
340 CLOSE_PIPE (out_pipe);
344 if (standard_input && !create_pipe (in_pipe, error)) {
345 CLOSE_PIPE (info_pipe);
346 CLOSE_PIPE (out_pipe);
347 CLOSE_PIPE (err_pipe);
353 CLOSE_PIPE (info_pipe);
354 CLOSE_PIPE (out_pipe);
355 CLOSE_PIPE (err_pipe);
356 CLOSE_PIPE (in_pipe);
357 set_error ("%s", "Error in fork ()");
362 /* No zombie left behind */
363 if ((flags & G_SPAWN_DO_NOT_REAP_CHILD) == 0) {
368 exit (pid == -1 ? 1 : 0);
376 close (info_pipe [0]);
378 close (out_pipe [0]);
379 close (err_pipe [0]);
381 /* when exec* succeeds, we want to close this fd, which will return
382 * a 0 read on the parent. We're not supposed to keep it open forever.
383 * If exec fails, we still can write the error to it before closing.
385 fcntl (info_pipe [1], F_SETFD, FD_CLOEXEC);
387 if ((flags & G_SPAWN_DO_NOT_REAP_CHILD) == 0) {
389 NO_INTR (unused, write_all (info_pipe [1], &pid, sizeof (pid_t)));
392 if (working_directory && chdir (working_directory) == -1) {
394 NO_INTR (unused, write_all (info_pipe [1], &err, sizeof (int)));
398 if (standard_output) {
399 dup2 (out_pipe [1], STDOUT_FILENO);
400 } else if ((flags & G_SPAWN_STDOUT_TO_DEV_NULL) != 0) {
401 fd = open ("/dev/null", O_WRONLY);
402 dup2 (fd, STDOUT_FILENO);
405 if (standard_error) {
406 dup2 (err_pipe [1], STDERR_FILENO);
407 } else if ((flags & G_SPAWN_STDERR_TO_DEV_NULL) != 0) {
408 fd = open ("/dev/null", O_WRONLY);
409 dup2 (fd, STDERR_FILENO);
412 if (standard_input) {
413 dup2 (in_pipe [0], STDIN_FILENO);
414 } else if ((flags & G_SPAWN_CHILD_INHERITS_STDIN) == 0) {
415 fd = open ("/dev/null", O_RDONLY);
416 dup2 (fd, STDIN_FILENO);
419 if ((flags & G_SPAWN_LEAVE_DESCRIPTORS_OPEN) != 0) {
420 for (i = getdtablesize () - 1; i >= 3; i--)
424 actual_args = ((flags & G_SPAWN_FILE_AND_ARGV_ZERO) == 0) ? argv : argv + 1;
429 child_setup (user_data);
432 if (!g_path_is_absolute (arg0) || (flags & G_SPAWN_SEARCH_PATH) != 0) {
433 arg0 = g_find_program_in_path (argv [0]);
436 write_all (info_pipe [1], &err, sizeof (int));
441 execve (arg0, actual_args, envp);
442 write_all (info_pipe [1], &errno, sizeof (int));
445 } else if ((flags & G_SPAWN_DO_NOT_REAP_CHILD) == 0) {
447 /* Wait for the first child if two are created */
448 NO_INTR (w, waitpid (pid, &status, 0));
449 if (status == 1 || w == -1) {
450 CLOSE_PIPE (info_pipe);
451 CLOSE_PIPE (out_pipe);
452 CLOSE_PIPE (err_pipe);
453 CLOSE_PIPE (in_pipe);
454 set_error ("Error in fork (): %d", status);
458 close (info_pipe [1]);
460 close (out_pipe [1]);
461 close (err_pipe [1]);
463 if ((flags & G_SPAWN_DO_NOT_REAP_CHILD) == 0) {
465 NO_INTR (x, read (info_pipe [0], &pid, sizeof (pid_t))); /* if we read < sizeof (pid_t)... */
472 if (read (info_pipe [0], &status, sizeof (int)) != 0) {
473 close (info_pipe [0]);
475 close (out_pipe [1]);
476 close (err_pipe [1]);
477 set_error_status (status, "Error in exec (%d -> %s)", status, strerror (status));
481 close (info_pipe [0]);
483 *standard_input = in_pipe [1];
485 *standard_output = out_pipe [0];
487 *standard_error = err_pipe [0];