Git 1.7.12.4
[git/git.git] / run-command.c
CommitLineData
b1bf95bb
JW
1#include "cache.h"
2#include "run-command.h"
77cb17e9 3#include "exec_cmd.h"
afe19ff7 4#include "sigchain.h"
5d40a179 5#include "argv-array.h"
b1bf95bb 6
b3e34ddd
BW
7#ifndef SHELL_PATH
8# define SHELL_PATH "/bin/sh"
9#endif
10
afe19ff7
JK
11struct child_to_clean {
12 pid_t pid;
13 struct child_to_clean *next;
14};
15static struct child_to_clean *children_to_clean;
16static int installed_child_cleanup_handler;
17
18static void cleanup_children(int sig)
19{
20 while (children_to_clean) {
21 struct child_to_clean *p = children_to_clean;
22 children_to_clean = p->next;
23 kill(p->pid, sig);
24 free(p);
25 }
26}
27
28static void cleanup_children_on_signal(int sig)
29{
30 cleanup_children(sig);
31 sigchain_pop(sig);
32 raise(sig);
33}
34
35static void cleanup_children_on_exit(void)
36{
37 cleanup_children(SIGTERM);
38}
39
40static void mark_child_for_cleanup(pid_t pid)
41{
42 struct child_to_clean *p = xmalloc(sizeof(*p));
43 p->pid = pid;
44 p->next = children_to_clean;
45 children_to_clean = p;
46
47 if (!installed_child_cleanup_handler) {
48 atexit(cleanup_children_on_exit);
49 sigchain_push_common(cleanup_children_on_signal);
50 installed_child_cleanup_handler = 1;
51 }
52}
53
54static void clear_child_for_cleanup(pid_t pid)
55{
bdee397d 56 struct child_to_clean **pp;
afe19ff7 57
bdee397d
DG
58 for (pp = &children_to_clean; *pp; pp = &(*pp)->next) {
59 struct child_to_clean *clean_me = *pp;
60
61 if (clean_me->pid == pid) {
62 *pp = clean_me->next;
63 free(clean_me);
afe19ff7
JK
64 return;
65 }
66 }
67}
68
9dc09c76
SP
69static inline void close_pair(int fd[2])
70{
71 close(fd[0]);
72 close(fd[1]);
73}
74
75301f90 75#ifndef WIN32
e4507ae8
SP
76static inline void dup_devnull(int to)
77{
78 int fd = open("/dev/null", O_RDWR);
79 dup2(fd, to);
80 close(fd);
81}
75301f90 82#endif
e4507ae8 83
38f865c2
JK
84static char *locate_in_PATH(const char *file)
85{
86 const char *p = getenv("PATH");
87 struct strbuf buf = STRBUF_INIT;
88
89 if (!p || !*p)
90 return NULL;
91
92 while (1) {
93 const char *end = strchrnul(p, ':');
94
95 strbuf_reset(&buf);
96
97 /* POSIX specifies an empty entry as the current directory. */
98 if (end != p) {
99 strbuf_add(&buf, p, end - p);
100 strbuf_addch(&buf, '/');
101 }
102 strbuf_addstr(&buf, file);
103
104 if (!access(buf.buf, F_OK))
105 return strbuf_detach(&buf, NULL);
106
107 if (!*end)
108 break;
109 p = end + 1;
110 }
111
112 strbuf_release(&buf);
113 return NULL;
114}
115
116static int exists_in_PATH(const char *file)
117{
118 char *r = locate_in_PATH(file);
119 free(r);
120 return r != NULL;
121}
122
123int sane_execvp(const char *file, char * const argv[])
124{
125 if (!execvp(file, argv))
126 return 0; /* cannot happen ;-) */
127
128 /*
129 * When a command can't be found because one of the directories
130 * listed in $PATH is unsearchable, execvp reports EACCES, but
131 * careful usability testing (read: analysis of occasional bug
132 * reports) reveals that "No such file or directory" is more
133 * intuitive.
134 *
135 * We avoid commands with "/", because execvp will not do $PATH
136 * lookups in that case.
137 *
138 * The reassignment of EACCES to errno looks like a no-op below,
139 * but we need to protect against exists_in_PATH overwriting errno.
140 */
141 if (errno == EACCES && !strchr(file, '/'))
142 errno = exists_in_PATH(file) ? EACCES : ENOENT;
a7855083
JH
143 else if (errno == ENOTDIR && !strchr(file, '/'))
144 errno = ENOENT;
38f865c2
JK
145 return -1;
146}
147
8dba1e63
JK
148static const char **prepare_shell_cmd(const char **argv)
149{
150 int argc, nargc = 0;
151 const char **nargv;
152
153 for (argc = 0; argv[argc]; argc++)
154 ; /* just counting */
155 /* +1 for NULL, +3 for "sh -c" plus extra $0 */
156 nargv = xmalloc(sizeof(*nargv) * (argc + 1 + 3));
157
158 if (argc < 1)
159 die("BUG: shell command is empty");
160
f445644f 161 if (strcspn(argv[0], "|&;<>()$`\\\"' \t\n*?[#~=%") != strlen(argv[0])) {
77629754 162#ifndef WIN32
b3e34ddd 163 nargv[nargc++] = SHELL_PATH;
77629754
JS
164#else
165 nargv[nargc++] = "sh";
166#endif
f445644f 167 nargv[nargc++] = "-c";
8dba1e63 168
f445644f
JK
169 if (argc < 2)
170 nargv[nargc++] = argv[0];
171 else {
172 struct strbuf arg0 = STRBUF_INIT;
173 strbuf_addf(&arg0, "%s \"$@\"", argv[0]);
174 nargv[nargc++] = strbuf_detach(&arg0, NULL);
175 }
8dba1e63
JK
176 }
177
178 for (argc = 0; argv[argc]; argc++)
179 nargv[nargc++] = argv[argc];
180 nargv[nargc] = NULL;
181
182 return nargv;
183}
184
185#ifndef WIN32
186static int execv_shell_cmd(const char **argv)
187{
188 const char **nargv = prepare_shell_cmd(argv);
189 trace_argv_printf(nargv, "trace: exec:");
38f865c2 190 sane_execvp(nargv[0], (char **)nargv);
8dba1e63
JK
191 free(nargv);
192 return -1;
193}
194#endif
195
a5487ddf
JS
196#ifndef WIN32
197static int child_err = 2;
2b541bf8
JS
198static int child_notifier = -1;
199
200static void notify_parent(void)
201{
a111eb78
JN
202 /*
203 * execvp failed. If possible, we'd like to let start_command
204 * know, so failures like ENOENT can be handled right away; but
205 * otherwise, finish_command will still report the error.
206 */
207 xwrite(child_notifier, "", 1);
2b541bf8 208}
a5487ddf
JS
209
210static NORETURN void die_child(const char *err, va_list params)
211{
3bc4181f 212 vwritef(child_err, "fatal: ", err, params);
a5487ddf
JS
213 exit(128);
214}
3bc4181f
CB
215
216static void error_child(const char *err, va_list params)
217{
218 vwritef(child_err, "error: ", err, params);
219}
200a76b7 220#endif
a5487ddf
JS
221
222static inline void set_cloexec(int fd)
223{
224 int flags = fcntl(fd, F_GETFD);
225 if (flags >= 0)
226 fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
227}
a5487ddf 228
ab0b41da
JS
229static int wait_or_whine(pid_t pid, const char *argv0, int silent_exec_failure)
230{
231 int status, code = -1;
232 pid_t waiting;
233 int failed_errno = 0;
234
235 while ((waiting = waitpid(pid, &status, 0)) < 0 && errno == EINTR)
236 ; /* nothing */
237
238 if (waiting < 0) {
239 failed_errno = errno;
240 error("waitpid for %s failed: %s", argv0, strerror(errno));
241 } else if (waiting != pid) {
242 error("waitpid is confused (%s)", argv0);
243 } else if (WIFSIGNALED(status)) {
244 code = WTERMSIG(status);
245 error("%s died of signal %d", argv0, code);
246 /*
247 * This return value is chosen so that code & 0xff
248 * mimics the exit code that a POSIX shell would report for
249 * a program that died from this signal.
250 */
251 code -= 128;
252 } else if (WIFEXITED(status)) {
253 code = WEXITSTATUS(status);
254 /*
255 * Convert special exit code when execvp failed.
256 */
257 if (code == 127) {
258 code = -1;
259 failed_errno = ENOENT;
ab0b41da
JS
260 }
261 } else {
262 error("waitpid is confused (%s)", argv0);
263 }
afe19ff7
JK
264
265 clear_child_for_cleanup(pid);
266
ab0b41da
JS
267 errno = failed_errno;
268 return code;
269}
270
ebcb5d16 271int start_command(struct child_process *cmd)
b1bf95bb 272{
f3b33f1d
JS
273 int need_in, need_out, need_err;
274 int fdin[2], fdout[2], fderr[2];
5a7a3671 275 int failed_errno = failed_errno;
4919bf03 276
c20181e3
JS
277 /*
278 * In case of errors we must keep the promise to close FDs
279 * that have been passed in via ->in and ->out.
280 */
281
e4507ae8 282 need_in = !cmd->no_stdin && cmd->in < 0;
4919bf03 283 if (need_in) {
c20181e3 284 if (pipe(fdin) < 0) {
0ac77ec3 285 failed_errno = errno;
c20181e3
JS
286 if (cmd->out > 0)
287 close(cmd->out);
0ac77ec3 288 goto fail_pipe;
c20181e3 289 }
4919bf03 290 cmd->in = fdin[1];
4919bf03
SP
291 }
292
e4507ae8
SP
293 need_out = !cmd->no_stdout
294 && !cmd->stdout_to_stderr
295 && cmd->out < 0;
f4bba25b
SP
296 if (need_out) {
297 if (pipe(fdout) < 0) {
0ac77ec3 298 failed_errno = errno;
f4bba25b
SP
299 if (need_in)
300 close_pair(fdin);
c20181e3
JS
301 else if (cmd->in)
302 close(cmd->in);
0ac77ec3 303 goto fail_pipe;
f4bba25b
SP
304 }
305 cmd->out = fdout[0];
f4bba25b
SP
306 }
307
b73a4397 308 need_err = !cmd->no_stderr && cmd->err < 0;
f3b33f1d
JS
309 if (need_err) {
310 if (pipe(fderr) < 0) {
0ac77ec3 311 failed_errno = errno;
f3b33f1d
JS
312 if (need_in)
313 close_pair(fdin);
c20181e3
JS
314 else if (cmd->in)
315 close(cmd->in);
f3b33f1d
JS
316 if (need_out)
317 close_pair(fdout);
c20181e3
JS
318 else if (cmd->out)
319 close(cmd->out);
0ac77ec3
JS
320fail_pipe:
321 error("cannot create pipe for %s: %s",
322 cmd->argv[0], strerror(failed_errno));
323 errno = failed_errno;
324 return -1;
f3b33f1d
JS
325 }
326 cmd->err = fderr[0];
327 }
328
8852f5d7 329 trace_argv_printf(cmd->argv, "trace: run_command:");
13af8cbd 330 fflush(NULL);
8852f5d7 331
71064e3f 332#ifndef WIN32
2b541bf8
JS
333{
334 int notify_pipe[2];
335 if (pipe(notify_pipe))
336 notify_pipe[0] = notify_pipe[1] = -1;
337
ebcb5d16 338 cmd->pid = fork();
ebcb5d16 339 if (!cmd->pid) {
a5487ddf
JS
340 /*
341 * Redirect the channel to write syscall error messages to
342 * before redirecting the process's stderr so that all die()
343 * in subsequent call paths use the parent's stderr.
344 */
345 if (cmd->no_stderr || need_err) {
346 child_err = dup(2);
347 set_cloexec(child_err);
348 }
349 set_die_routine(die_child);
3bc4181f 350 set_error_routine(error_child);
a5487ddf 351
2b541bf8
JS
352 close(notify_pipe[0]);
353 set_cloexec(notify_pipe[1]);
354 child_notifier = notify_pipe[1];
355 atexit(notify_parent);
356
e4507ae8
SP
357 if (cmd->no_stdin)
358 dup_devnull(0);
359 else if (need_in) {
4919bf03 360 dup2(fdin[0], 0);
9dc09c76 361 close_pair(fdin);
4919bf03
SP
362 } else if (cmd->in) {
363 dup2(cmd->in, 0);
364 close(cmd->in);
95d3c4f5 365 }
4919bf03 366
ce2cf27a
CC
367 if (cmd->no_stderr)
368 dup_devnull(2);
369 else if (need_err) {
370 dup2(fderr[1], 2);
371 close_pair(fderr);
4f41b611
SP
372 } else if (cmd->err > 1) {
373 dup2(cmd->err, 2);
374 close(cmd->err);
ce2cf27a
CC
375 }
376
e4507ae8
SP
377 if (cmd->no_stdout)
378 dup_devnull(1);
379 else if (cmd->stdout_to_stderr)
cd83c74c 380 dup2(2, 1);
f4bba25b
SP
381 else if (need_out) {
382 dup2(fdout[1], 1);
383 close_pair(fdout);
384 } else if (cmd->out > 1) {
385 dup2(cmd->out, 1);
386 close(cmd->out);
387 }
388
1568fea0 389 if (cmd->dir && chdir(cmd->dir))
d824cbba
TR
390 die_errno("exec '%s': cd to '%s' failed", cmd->argv[0],
391 cmd->dir);
ee493148 392 if (cmd->env) {
3427b375
AR
393 for (; *cmd->env; cmd->env++) {
394 if (strchr(*cmd->env, '='))
4b25d091 395 putenv((char *)*cmd->env);
3427b375
AR
396 else
397 unsetenv(*cmd->env);
398 }
ee493148 399 }
2b541bf8
JS
400 if (cmd->preexec_cb) {
401 /*
402 * We cannot predict what the pre-exec callback does.
403 * Forgo parent notification.
404 */
405 close(child_notifier);
406 child_notifier = -1;
407
ccf08bc3 408 cmd->preexec_cb();
2b541bf8 409 }
f1000898
SP
410 if (cmd->git_cmd) {
411 execv_git_cmd(cmd->argv);
8dba1e63
JK
412 } else if (cmd->use_shell) {
413 execv_shell_cmd(cmd->argv);
77cb17e9 414 } else {
38f865c2 415 sane_execvp(cmd->argv[0], (char *const*) cmd->argv);
128aed68 416 }
fc1b56f0
CB
417 if (errno == ENOENT) {
418 if (!cmd->silent_exec_failure)
419 error("cannot run %s: %s", cmd->argv[0],
420 strerror(ENOENT));
a5487ddf 421 exit(127);
fc1b56f0 422 } else {
a5487ddf 423 die_errno("cannot exec '%s'", cmd->argv[0]);
fc1b56f0 424 }
b1bf95bb 425 }
0ac77ec3
JS
426 if (cmd->pid < 0)
427 error("cannot fork() for %s: %s", cmd->argv[0],
428 strerror(failed_errno = errno));
afe19ff7
JK
429 else if (cmd->clean_on_exit)
430 mark_child_for_cleanup(cmd->pid);
2b541bf8
JS
431
432 /*
433 * Wait for child's execvp. If the execvp succeeds (or if fork()
434 * failed), EOF is seen immediately by the parent. Otherwise, the
435 * child process sends a single byte.
436 * Note that use of this infrastructure is completely advisory,
437 * therefore, we keep error checks minimal.
438 */
439 close(notify_pipe[1]);
440 if (read(notify_pipe[0], &notify_pipe[1], 1) == 1) {
441 /*
442 * At this point we know that fork() succeeded, but execvp()
443 * failed. Errors have been reported to our stderr.
444 */
445 wait_or_whine(cmd->pid, cmd->argv[0],
446 cmd->silent_exec_failure);
447 failed_errno = errno;
448 cmd->pid = -1;
449 }
450 close(notify_pipe[0]);
afe19ff7 451
2b541bf8 452}
ba26f296 453#else
0d30ad71 454{
75301f90 455 int fhin = 0, fhout = 1, fherr = 2;
108ac313 456 const char **sargv = cmd->argv;
ba26f296 457 char **env = environ;
ba26f296 458
75301f90
JS
459 if (cmd->no_stdin)
460 fhin = open("/dev/null", O_RDWR);
461 else if (need_in)
462 fhin = dup(fdin[0]);
463 else if (cmd->in)
464 fhin = dup(cmd->in);
465
466 if (cmd->no_stderr)
467 fherr = open("/dev/null", O_RDWR);
468 else if (need_err)
469 fherr = dup(fderr[1]);
76d44c8c
JH
470 else if (cmd->err > 2)
471 fherr = dup(cmd->err);
75301f90
JS
472
473 if (cmd->no_stdout)
474 fhout = open("/dev/null", O_RDWR);
475 else if (cmd->stdout_to_stderr)
476 fhout = dup(fherr);
477 else if (need_out)
478 fhout = dup(fdout[1]);
479 else if (cmd->out > 1)
480 fhout = dup(cmd->out);
ba26f296 481
2affea41
JS
482 if (cmd->env)
483 env = make_augmented_environ(cmd->env);
ba26f296
JS
484
485 if (cmd->git_cmd) {
108ac313 486 cmd->argv = prepare_git_cmd(cmd->argv);
8dba1e63
JK
487 } else if (cmd->use_shell) {
488 cmd->argv = prepare_shell_cmd(cmd->argv);
ba26f296
JS
489 }
490
f9a2743c 491 cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, env, cmd->dir,
75301f90 492 fhin, fhout, fherr);
0ac77ec3 493 failed_errno = errno;
c024beb5 494 if (cmd->pid < 0 && (!cmd->silent_exec_failure || errno != ENOENT))
0ac77ec3 495 error("cannot spawn %s: %s", cmd->argv[0], strerror(errno));
afe19ff7
JK
496 if (cmd->clean_on_exit && cmd->pid >= 0)
497 mark_child_for_cleanup(cmd->pid);
ba26f296
JS
498
499 if (cmd->env)
500 free_environ(env);
501 if (cmd->git_cmd)
108ac313 502 free(cmd->argv);
ba26f296 503
108ac313 504 cmd->argv = sargv;
75301f90
JS
505 if (fhin != 0)
506 close(fhin);
507 if (fhout != 1)
508 close(fhout);
509 if (fherr != 2)
510 close(fherr);
0d30ad71 511}
ba26f296
JS
512#endif
513
514 if (cmd->pid < 0) {
515 if (need_in)
516 close_pair(fdin);
517 else if (cmd->in)
518 close(cmd->in);
519 if (need_out)
520 close_pair(fdout);
521 else if (cmd->out)
522 close(cmd->out);
523 if (need_err)
524 close_pair(fderr);
fc012c28
D
525 else if (cmd->err)
526 close(cmd->err);
0ac77ec3
JS
527 errno = failed_errno;
528 return -1;
ba26f296 529 }
4919bf03
SP
530
531 if (need_in)
532 close(fdin[0]);
533 else if (cmd->in)
534 close(cmd->in);
535
f4bba25b
SP
536 if (need_out)
537 close(fdout[1]);
c20181e3 538 else if (cmd->out)
f4bba25b
SP
539 close(cmd->out);
540
f3b33f1d
JS
541 if (need_err)
542 close(fderr[1]);
4f41b611
SP
543 else if (cmd->err)
544 close(cmd->err);
f3b33f1d 545
ebcb5d16
SP
546 return 0;
547}
548
2d22c208
JS
549int finish_command(struct child_process *cmd)
550{
c024beb5 551 return wait_or_whine(cmd->pid, cmd->argv[0], cmd->silent_exec_failure);
2d22c208
JS
552}
553
ebcb5d16
SP
554int run_command(struct child_process *cmd)
555{
556 int code = start_command(cmd);
557 if (code)
558 return code;
559 return finish_command(cmd);
560}
561
1568fea0 562static void prepare_run_command_v_opt(struct child_process *cmd,
ee493148
AR
563 const char **argv,
564 int opt)
1568fea0
AR
565{
566 memset(cmd, 0, sizeof(*cmd));
567 cmd->argv = argv;
568 cmd->no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0;
569 cmd->git_cmd = opt & RUN_GIT_CMD ? 1 : 0;
570 cmd->stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0;
c024beb5 571 cmd->silent_exec_failure = opt & RUN_SILENT_EXEC_FAILURE ? 1 : 0;
8dba1e63 572 cmd->use_shell = opt & RUN_USING_SHELL ? 1 : 0;
10c6cddd 573 cmd->clean_on_exit = opt & RUN_CLEAN_ON_EXIT ? 1 : 0;
1568fea0
AR
574}
575
f1000898
SP
576int run_command_v_opt(const char **argv, int opt)
577{
578 struct child_process cmd;
1568fea0
AR
579 prepare_run_command_v_opt(&cmd, argv, opt);
580 return run_command(&cmd);
581}
582
ee493148
AR
583int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env)
584{
585 struct child_process cmd;
586 prepare_run_command_v_opt(&cmd, argv, opt);
587 cmd.dir = dir;
588 cmd.env = env;
589 return run_command(&cmd);
590}
2d22c208 591
f6b60983 592#ifndef NO_PTHREADS
0ea1c89b
JS
593static pthread_t main_thread;
594static int main_thread_set;
595static pthread_key_t async_key;
596
200a76b7 597static void *run_thread(void *data)
618ebe9f
JS
598{
599 struct async *async = data;
f6b60983 600 intptr_t ret;
0ea1c89b
JS
601
602 pthread_setspecific(async_key, async);
f6b60983 603 ret = async->proc(async->proc_in, async->proc_out, async->data);
200a76b7 604 return (void *)ret;
618ebe9f 605}
0ea1c89b
JS
606
607static NORETURN void die_async(const char *err, va_list params)
608{
609 vreportf("fatal: ", err, params);
610
611 if (!pthread_equal(main_thread, pthread_self())) {
612 struct async *async = pthread_getspecific(async_key);
613 if (async->proc_in >= 0)
614 close(async->proc_in);
615 if (async->proc_out >= 0)
616 close(async->proc_out);
617 pthread_exit((void *)128);
618 }
619
620 exit(128);
618ebe9f
JS
621}
622#endif
623
2d22c208
JS
624int start_async(struct async *async)
625{
ae6a5609
EFL
626 int need_in, need_out;
627 int fdin[2], fdout[2];
628 int proc_in, proc_out;
2d22c208 629
ae6a5609
EFL
630 need_in = async->in < 0;
631 if (need_in) {
632 if (pipe(fdin) < 0) {
633 if (async->out > 0)
634 close(async->out);
635 return error("cannot create pipe: %s", strerror(errno));
636 }
637 async->in = fdin[1];
638 }
639
640 need_out = async->out < 0;
641 if (need_out) {
642 if (pipe(fdout) < 0) {
643 if (need_in)
644 close_pair(fdin);
645 else if (async->in)
646 close(async->in);
647 return error("cannot create pipe: %s", strerror(errno));
648 }
649 async->out = fdout[0];
650 }
651
652 if (need_in)
653 proc_in = fdin[0];
654 else if (async->in)
655 proc_in = async->in;
656 else
657 proc_in = -1;
658
659 if (need_out)
660 proc_out = fdout[1];
661 else if (async->out)
662 proc_out = async->out;
663 else
664 proc_out = -1;
2d22c208 665
f6b60983 666#ifdef NO_PTHREADS
2c3766f0
AM
667 /* Flush stdio before fork() to avoid cloning buffers */
668 fflush(NULL);
669
2d22c208
JS
670 async->pid = fork();
671 if (async->pid < 0) {
672 error("fork (async) failed: %s", strerror(errno));
ae6a5609 673 goto error;
2d22c208
JS
674 }
675 if (!async->pid) {
ae6a5609
EFL
676 if (need_in)
677 close(fdin[1]);
678 if (need_out)
679 close(fdout[0]);
680 exit(!!async->proc(proc_in, proc_out, async->data));
2d22c208 681 }
ae6a5609 682
afe19ff7
JK
683 mark_child_for_cleanup(async->pid);
684
ae6a5609
EFL
685 if (need_in)
686 close(fdin[0]);
687 else if (async->in)
688 close(async->in);
689
690 if (need_out)
691 close(fdout[1]);
692 else if (async->out)
693 close(async->out);
618ebe9f 694#else
0ea1c89b
JS
695 if (!main_thread_set) {
696 /*
697 * We assume that the first time that start_async is called
698 * it is from the main thread.
699 */
700 main_thread_set = 1;
701 main_thread = pthread_self();
702 pthread_key_create(&async_key, NULL);
703 set_die_routine(die_async);
704 }
705
200a76b7
JS
706 if (proc_in >= 0)
707 set_cloexec(proc_in);
708 if (proc_out >= 0)
709 set_cloexec(proc_out);
ae6a5609
EFL
710 async->proc_in = proc_in;
711 async->proc_out = proc_out;
200a76b7
JS
712 {
713 int err = pthread_create(&async->tid, NULL, run_thread, async);
714 if (err) {
715 error("cannot create thread: %s", strerror(err));
716 goto error;
717 }
618ebe9f
JS
718 }
719#endif
2d22c208 720 return 0;
ae6a5609
EFL
721
722error:
723 if (need_in)
724 close_pair(fdin);
725 else if (async->in)
726 close(async->in);
727
728 if (need_out)
729 close_pair(fdout);
730 else if (async->out)
731 close(async->out);
732 return -1;
2d22c208
JS
733}
734
735int finish_async(struct async *async)
736{
f6b60983 737#ifdef NO_PTHREADS
200a76b7 738 return wait_or_whine(async->pid, "child process", 0);
618ebe9f 739#else
200a76b7
JS
740 void *ret = (void *)(intptr_t)(-1);
741
742 if (pthread_join(async->tid, &ret))
743 error("pthread_join failed");
744 return (int)(intptr_t)ret;
618ebe9f 745#endif
2d22c208 746}
ae98a008
SB
747
748int run_hook(const char *index_file, const char *name, ...)
749{
750 struct child_process hook;
5d40a179
JK
751 struct argv_array argv = ARGV_ARRAY_INIT;
752 const char *p, *env[2];
ae98a008
SB
753 char index[PATH_MAX];
754 va_list args;
755 int ret;
ae98a008 756
cf94ca8e
SB
757 if (access(git_path("hooks/%s", name), X_OK) < 0)
758 return 0;
759
ae98a008 760 va_start(args, name);
5d40a179
JK
761 argv_array_push(&argv, git_path("hooks/%s", name));
762 while ((p = va_arg(args, const char *)))
763 argv_array_push(&argv, p);
ae98a008
SB
764 va_end(args);
765
ae98a008 766 memset(&hook, 0, sizeof(hook));
5d40a179 767 hook.argv = argv.argv;
ae98a008
SB
768 hook.no_stdin = 1;
769 hook.stdout_to_stderr = 1;
770 if (index_file) {
771 snprintf(index, sizeof(index), "GIT_INDEX_FILE=%s", index_file);
772 env[0] = index;
773 env[1] = NULL;
774 hook.env = env;
775 }
776
0ac77ec3 777 ret = run_command(&hook);
5d40a179 778 argv_array_clear(&argv);
ae98a008
SB
779 return ret;
780}