test patch hunk editing with "commit -p -m"
[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
380395d0 75#ifndef GIT_WINDOWS_NATIVE
e4507ae8
SP
76static inline void dup_devnull(int to)
77{
78 int fd = open("/dev/null", O_RDWR);
a77f106c
TR
79 if (fd < 0)
80 die_errno(_("open /dev/null failed"));
81 if (dup2(fd, to) < 0)
82 die_errno(_("dup2(%d,%d) failed"), fd, to);
e4507ae8
SP
83 close(fd);
84}
75301f90 85#endif
e4507ae8 86
38f865c2
JK
87static char *locate_in_PATH(const char *file)
88{
89 const char *p = getenv("PATH");
90 struct strbuf buf = STRBUF_INIT;
91
92 if (!p || !*p)
93 return NULL;
94
95 while (1) {
96 const char *end = strchrnul(p, ':');
97
98 strbuf_reset(&buf);
99
100 /* POSIX specifies an empty entry as the current directory. */
101 if (end != p) {
102 strbuf_add(&buf, p, end - p);
103 strbuf_addch(&buf, '/');
104 }
105 strbuf_addstr(&buf, file);
106
107 if (!access(buf.buf, F_OK))
108 return strbuf_detach(&buf, NULL);
109
110 if (!*end)
111 break;
112 p = end + 1;
113 }
114
115 strbuf_release(&buf);
116 return NULL;
117}
118
119static int exists_in_PATH(const char *file)
120{
121 char *r = locate_in_PATH(file);
122 free(r);
123 return r != NULL;
124}
125
126int sane_execvp(const char *file, char * const argv[])
127{
128 if (!execvp(file, argv))
129 return 0; /* cannot happen ;-) */
130
131 /*
132 * When a command can't be found because one of the directories
133 * listed in $PATH is unsearchable, execvp reports EACCES, but
134 * careful usability testing (read: analysis of occasional bug
135 * reports) reveals that "No such file or directory" is more
136 * intuitive.
137 *
138 * We avoid commands with "/", because execvp will not do $PATH
139 * lookups in that case.
140 *
141 * The reassignment of EACCES to errno looks like a no-op below,
142 * but we need to protect against exists_in_PATH overwriting errno.
143 */
144 if (errno == EACCES && !strchr(file, '/'))
145 errno = exists_in_PATH(file) ? EACCES : ENOENT;
a7855083
JH
146 else if (errno == ENOTDIR && !strchr(file, '/'))
147 errno = ENOENT;
38f865c2
JK
148 return -1;
149}
150
8dba1e63
JK
151static const char **prepare_shell_cmd(const char **argv)
152{
153 int argc, nargc = 0;
154 const char **nargv;
155
156 for (argc = 0; argv[argc]; argc++)
157 ; /* just counting */
158 /* +1 for NULL, +3 for "sh -c" plus extra $0 */
159 nargv = xmalloc(sizeof(*nargv) * (argc + 1 + 3));
160
161 if (argc < 1)
162 die("BUG: shell command is empty");
163
f445644f 164 if (strcspn(argv[0], "|&;<>()$`\\\"' \t\n*?[#~=%") != strlen(argv[0])) {
380395d0 165#ifndef GIT_WINDOWS_NATIVE
b3e34ddd 166 nargv[nargc++] = SHELL_PATH;
77629754
JS
167#else
168 nargv[nargc++] = "sh";
169#endif
f445644f 170 nargv[nargc++] = "-c";
8dba1e63 171
f445644f
JK
172 if (argc < 2)
173 nargv[nargc++] = argv[0];
174 else {
175 struct strbuf arg0 = STRBUF_INIT;
176 strbuf_addf(&arg0, "%s \"$@\"", argv[0]);
177 nargv[nargc++] = strbuf_detach(&arg0, NULL);
178 }
8dba1e63
JK
179 }
180
181 for (argc = 0; argv[argc]; argc++)
182 nargv[nargc++] = argv[argc];
183 nargv[nargc] = NULL;
184
185 return nargv;
186}
187
380395d0 188#ifndef GIT_WINDOWS_NATIVE
8dba1e63
JK
189static int execv_shell_cmd(const char **argv)
190{
191 const char **nargv = prepare_shell_cmd(argv);
192 trace_argv_printf(nargv, "trace: exec:");
38f865c2 193 sane_execvp(nargv[0], (char **)nargv);
8dba1e63
JK
194 free(nargv);
195 return -1;
196}
197#endif
198
380395d0 199#ifndef GIT_WINDOWS_NATIVE
a5487ddf 200static int child_err = 2;
2b541bf8
JS
201static int child_notifier = -1;
202
203static void notify_parent(void)
204{
a111eb78
JN
205 /*
206 * execvp failed. If possible, we'd like to let start_command
207 * know, so failures like ENOENT can be handled right away; but
208 * otherwise, finish_command will still report the error.
209 */
210 xwrite(child_notifier, "", 1);
2b541bf8 211}
a5487ddf
JS
212
213static NORETURN void die_child(const char *err, va_list params)
214{
3bc4181f 215 vwritef(child_err, "fatal: ", err, params);
a5487ddf
JS
216 exit(128);
217}
3bc4181f
CB
218
219static void error_child(const char *err, va_list params)
220{
221 vwritef(child_err, "error: ", err, params);
222}
200a76b7 223#endif
a5487ddf
JS
224
225static inline void set_cloexec(int fd)
226{
227 int flags = fcntl(fd, F_GETFD);
228 if (flags >= 0)
229 fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
230}
a5487ddf 231
13274526 232static int wait_or_whine(pid_t pid, const char *argv0)
ab0b41da
JS
233{
234 int status, code = -1;
235 pid_t waiting;
236 int failed_errno = 0;
237
238 while ((waiting = waitpid(pid, &status, 0)) < 0 && errno == EINTR)
239 ; /* nothing */
240
241 if (waiting < 0) {
242 failed_errno = errno;
243 error("waitpid for %s failed: %s", argv0, strerror(errno));
244 } else if (waiting != pid) {
245 error("waitpid is confused (%s)", argv0);
246 } else if (WIFSIGNALED(status)) {
247 code = WTERMSIG(status);
a2767c5c
JK
248 if (code != SIGINT && code != SIGQUIT)
249 error("%s died of signal %d", argv0, code);
ab0b41da
JS
250 /*
251 * This return value is chosen so that code & 0xff
252 * mimics the exit code that a POSIX shell would report for
253 * a program that died from this signal.
254 */
709ca730 255 code += 128;
ab0b41da
JS
256 } else if (WIFEXITED(status)) {
257 code = WEXITSTATUS(status);
258 /*
259 * Convert special exit code when execvp failed.
260 */
261 if (code == 127) {
262 code = -1;
263 failed_errno = ENOENT;
ab0b41da
JS
264 }
265 } else {
266 error("waitpid is confused (%s)", argv0);
267 }
afe19ff7
JK
268
269 clear_child_for_cleanup(pid);
270
ab0b41da
JS
271 errno = failed_errno;
272 return code;
273}
274
ebcb5d16 275int start_command(struct child_process *cmd)
b1bf95bb 276{
f3b33f1d
JS
277 int need_in, need_out, need_err;
278 int fdin[2], fdout[2], fderr[2];
25043d8a 279 int failed_errno;
939296c4 280 char *str;
4919bf03 281
c20181e3
JS
282 /*
283 * In case of errors we must keep the promise to close FDs
284 * that have been passed in via ->in and ->out.
285 */
286
e4507ae8 287 need_in = !cmd->no_stdin && cmd->in < 0;
4919bf03 288 if (need_in) {
c20181e3 289 if (pipe(fdin) < 0) {
0ac77ec3 290 failed_errno = errno;
c20181e3
JS
291 if (cmd->out > 0)
292 close(cmd->out);
939296c4 293 str = "standard input";
0ac77ec3 294 goto fail_pipe;
c20181e3 295 }
4919bf03 296 cmd->in = fdin[1];
4919bf03
SP
297 }
298
e4507ae8
SP
299 need_out = !cmd->no_stdout
300 && !cmd->stdout_to_stderr
301 && cmd->out < 0;
f4bba25b
SP
302 if (need_out) {
303 if (pipe(fdout) < 0) {
0ac77ec3 304 failed_errno = errno;
f4bba25b
SP
305 if (need_in)
306 close_pair(fdin);
c20181e3
JS
307 else if (cmd->in)
308 close(cmd->in);
939296c4 309 str = "standard output";
0ac77ec3 310 goto fail_pipe;
f4bba25b
SP
311 }
312 cmd->out = fdout[0];
f4bba25b
SP
313 }
314
b73a4397 315 need_err = !cmd->no_stderr && cmd->err < 0;
f3b33f1d
JS
316 if (need_err) {
317 if (pipe(fderr) < 0) {
0ac77ec3 318 failed_errno = errno;
f3b33f1d
JS
319 if (need_in)
320 close_pair(fdin);
c20181e3
JS
321 else if (cmd->in)
322 close(cmd->in);
f3b33f1d
JS
323 if (need_out)
324 close_pair(fdout);
c20181e3
JS
325 else if (cmd->out)
326 close(cmd->out);
939296c4 327 str = "standard error";
0ac77ec3 328fail_pipe:
939296c4
SB
329 error("cannot create %s pipe for %s: %s",
330 str, cmd->argv[0], strerror(failed_errno));
0ac77ec3
JS
331 errno = failed_errno;
332 return -1;
f3b33f1d
JS
333 }
334 cmd->err = fderr[0];
335 }
336
8852f5d7 337 trace_argv_printf(cmd->argv, "trace: run_command:");
13af8cbd 338 fflush(NULL);
8852f5d7 339
380395d0 340#ifndef GIT_WINDOWS_NATIVE
2b541bf8
JS
341{
342 int notify_pipe[2];
343 if (pipe(notify_pipe))
344 notify_pipe[0] = notify_pipe[1] = -1;
345
ebcb5d16 346 cmd->pid = fork();
25043d8a 347 failed_errno = errno;
ebcb5d16 348 if (!cmd->pid) {
a5487ddf
JS
349 /*
350 * Redirect the channel to write syscall error messages to
351 * before redirecting the process's stderr so that all die()
352 * in subsequent call paths use the parent's stderr.
353 */
354 if (cmd->no_stderr || need_err) {
355 child_err = dup(2);
356 set_cloexec(child_err);
357 }
358 set_die_routine(die_child);
3bc4181f 359 set_error_routine(error_child);
a5487ddf 360
2b541bf8
JS
361 close(notify_pipe[0]);
362 set_cloexec(notify_pipe[1]);
363 child_notifier = notify_pipe[1];
364 atexit(notify_parent);
365
e4507ae8
SP
366 if (cmd->no_stdin)
367 dup_devnull(0);
368 else if (need_in) {
4919bf03 369 dup2(fdin[0], 0);
9dc09c76 370 close_pair(fdin);
4919bf03
SP
371 } else if (cmd->in) {
372 dup2(cmd->in, 0);
373 close(cmd->in);
95d3c4f5 374 }
4919bf03 375
ce2cf27a
CC
376 if (cmd->no_stderr)
377 dup_devnull(2);
378 else if (need_err) {
379 dup2(fderr[1], 2);
380 close_pair(fderr);
4f41b611
SP
381 } else if (cmd->err > 1) {
382 dup2(cmd->err, 2);
383 close(cmd->err);
ce2cf27a
CC
384 }
385
e4507ae8
SP
386 if (cmd->no_stdout)
387 dup_devnull(1);
388 else if (cmd->stdout_to_stderr)
cd83c74c 389 dup2(2, 1);
f4bba25b
SP
390 else if (need_out) {
391 dup2(fdout[1], 1);
392 close_pair(fdout);
393 } else if (cmd->out > 1) {
394 dup2(cmd->out, 1);
395 close(cmd->out);
396 }
397
1568fea0 398 if (cmd->dir && chdir(cmd->dir))
d824cbba
TR
399 die_errno("exec '%s': cd to '%s' failed", cmd->argv[0],
400 cmd->dir);
ee493148 401 if (cmd->env) {
3427b375
AR
402 for (; *cmd->env; cmd->env++) {
403 if (strchr(*cmd->env, '='))
4b25d091 404 putenv((char *)*cmd->env);
3427b375
AR
405 else
406 unsetenv(*cmd->env);
407 }
ee493148 408 }
5a50085c 409 if (cmd->git_cmd)
f1000898 410 execv_git_cmd(cmd->argv);
5a50085c 411 else if (cmd->use_shell)
8dba1e63 412 execv_shell_cmd(cmd->argv);
5a50085c 413 else
38f865c2 414 sane_execvp(cmd->argv[0], (char *const*) cmd->argv);
fc1b56f0
CB
415 if (errno == ENOENT) {
416 if (!cmd->silent_exec_failure)
417 error("cannot run %s: %s", cmd->argv[0],
418 strerror(ENOENT));
a5487ddf 419 exit(127);
fc1b56f0 420 } else {
a5487ddf 421 die_errno("cannot exec '%s'", cmd->argv[0]);
fc1b56f0 422 }
b1bf95bb 423 }
0ac77ec3
JS
424 if (cmd->pid < 0)
425 error("cannot fork() for %s: %s", cmd->argv[0],
25043d8a 426 strerror(errno));
afe19ff7
JK
427 else if (cmd->clean_on_exit)
428 mark_child_for_cleanup(cmd->pid);
2b541bf8
JS
429
430 /*
431 * Wait for child's execvp. If the execvp succeeds (or if fork()
432 * failed), EOF is seen immediately by the parent. Otherwise, the
433 * child process sends a single byte.
434 * Note that use of this infrastructure is completely advisory,
435 * therefore, we keep error checks minimal.
436 */
437 close(notify_pipe[1]);
438 if (read(notify_pipe[0], &notify_pipe[1], 1) == 1) {
439 /*
440 * At this point we know that fork() succeeded, but execvp()
441 * failed. Errors have been reported to our stderr.
442 */
13274526 443 wait_or_whine(cmd->pid, cmd->argv[0]);
2b541bf8
JS
444 failed_errno = errno;
445 cmd->pid = -1;
446 }
447 close(notify_pipe[0]);
448}
ba26f296 449#else
0d30ad71 450{
75301f90 451 int fhin = 0, fhout = 1, fherr = 2;
108ac313 452 const char **sargv = cmd->argv;
ba26f296 453 char **env = environ;
ba26f296 454
75301f90
JS
455 if (cmd->no_stdin)
456 fhin = open("/dev/null", O_RDWR);
457 else if (need_in)
458 fhin = dup(fdin[0]);
459 else if (cmd->in)
460 fhin = dup(cmd->in);
461
462 if (cmd->no_stderr)
463 fherr = open("/dev/null", O_RDWR);
464 else if (need_err)
465 fherr = dup(fderr[1]);
76d44c8c
JH
466 else if (cmd->err > 2)
467 fherr = dup(cmd->err);
75301f90
JS
468
469 if (cmd->no_stdout)
470 fhout = open("/dev/null", O_RDWR);
471 else if (cmd->stdout_to_stderr)
472 fhout = dup(fherr);
473 else if (need_out)
474 fhout = dup(fdout[1]);
475 else if (cmd->out > 1)
476 fhout = dup(cmd->out);
ba26f296 477
2affea41
JS
478 if (cmd->env)
479 env = make_augmented_environ(cmd->env);
ba26f296 480
5a50085c 481 if (cmd->git_cmd)
108ac313 482 cmd->argv = prepare_git_cmd(cmd->argv);
5a50085c 483 else if (cmd->use_shell)
8dba1e63 484 cmd->argv = prepare_shell_cmd(cmd->argv);
ba26f296 485
f9a2743c 486 cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, env, cmd->dir,
75301f90 487 fhin, fhout, fherr);
0ac77ec3 488 failed_errno = errno;
c024beb5 489 if (cmd->pid < 0 && (!cmd->silent_exec_failure || errno != ENOENT))
0ac77ec3 490 error("cannot spawn %s: %s", cmd->argv[0], strerror(errno));
afe19ff7
JK
491 if (cmd->clean_on_exit && cmd->pid >= 0)
492 mark_child_for_cleanup(cmd->pid);
ba26f296
JS
493
494 if (cmd->env)
495 free_environ(env);
496 if (cmd->git_cmd)
108ac313 497 free(cmd->argv);
ba26f296 498
108ac313 499 cmd->argv = sargv;
75301f90
JS
500 if (fhin != 0)
501 close(fhin);
502 if (fhout != 1)
503 close(fhout);
504 if (fherr != 2)
505 close(fherr);
0d30ad71 506}
ba26f296
JS
507#endif
508
509 if (cmd->pid < 0) {
510 if (need_in)
511 close_pair(fdin);
512 else if (cmd->in)
513 close(cmd->in);
514 if (need_out)
515 close_pair(fdout);
516 else if (cmd->out)
517 close(cmd->out);
518 if (need_err)
519 close_pair(fderr);
fc012c28
D
520 else if (cmd->err)
521 close(cmd->err);
0ac77ec3
JS
522 errno = failed_errno;
523 return -1;
ba26f296 524 }
4919bf03
SP
525
526 if (need_in)
527 close(fdin[0]);
528 else if (cmd->in)
529 close(cmd->in);
530
f4bba25b
SP
531 if (need_out)
532 close(fdout[1]);
c20181e3 533 else if (cmd->out)
f4bba25b
SP
534 close(cmd->out);
535
f3b33f1d
JS
536 if (need_err)
537 close(fderr[1]);
4f41b611
SP
538 else if (cmd->err)
539 close(cmd->err);
f3b33f1d 540
ebcb5d16
SP
541 return 0;
542}
543
2d22c208
JS
544int finish_command(struct child_process *cmd)
545{
13274526 546 return wait_or_whine(cmd->pid, cmd->argv[0]);
2d22c208
JS
547}
548
ebcb5d16
SP
549int run_command(struct child_process *cmd)
550{
551 int code = start_command(cmd);
552 if (code)
553 return code;
554 return finish_command(cmd);
555}
556
1568fea0 557static void prepare_run_command_v_opt(struct child_process *cmd,
ee493148
AR
558 const char **argv,
559 int opt)
1568fea0
AR
560{
561 memset(cmd, 0, sizeof(*cmd));
562 cmd->argv = argv;
563 cmd->no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0;
564 cmd->git_cmd = opt & RUN_GIT_CMD ? 1 : 0;
565 cmd->stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0;
c024beb5 566 cmd->silent_exec_failure = opt & RUN_SILENT_EXEC_FAILURE ? 1 : 0;
8dba1e63 567 cmd->use_shell = opt & RUN_USING_SHELL ? 1 : 0;
10c6cddd 568 cmd->clean_on_exit = opt & RUN_CLEAN_ON_EXIT ? 1 : 0;
1568fea0
AR
569}
570
f1000898
SP
571int run_command_v_opt(const char **argv, int opt)
572{
573 struct child_process cmd;
1568fea0
AR
574 prepare_run_command_v_opt(&cmd, argv, opt);
575 return run_command(&cmd);
576}
577
ee493148
AR
578int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env)
579{
580 struct child_process cmd;
581 prepare_run_command_v_opt(&cmd, argv, opt);
582 cmd.dir = dir;
583 cmd.env = env;
584 return run_command(&cmd);
585}
2d22c208 586
f6b60983 587#ifndef NO_PTHREADS
0ea1c89b
JS
588static pthread_t main_thread;
589static int main_thread_set;
590static pthread_key_t async_key;
1ece66bc 591static pthread_key_t async_die_counter;
0ea1c89b 592
200a76b7 593static void *run_thread(void *data)
618ebe9f
JS
594{
595 struct async *async = data;
f6b60983 596 intptr_t ret;
0ea1c89b
JS
597
598 pthread_setspecific(async_key, async);
f6b60983 599 ret = async->proc(async->proc_in, async->proc_out, async->data);
200a76b7 600 return (void *)ret;
618ebe9f 601}
0ea1c89b
JS
602
603static NORETURN void die_async(const char *err, va_list params)
604{
605 vreportf("fatal: ", err, params);
606
607 if (!pthread_equal(main_thread, pthread_self())) {
608 struct async *async = pthread_getspecific(async_key);
609 if (async->proc_in >= 0)
610 close(async->proc_in);
611 if (async->proc_out >= 0)
612 close(async->proc_out);
613 pthread_exit((void *)128);
614 }
615
616 exit(128);
618ebe9f 617}
1ece66bc
JK
618
619static int async_die_is_recursing(void)
620{
621 void *ret = pthread_getspecific(async_die_counter);
622 pthread_setspecific(async_die_counter, (void *)1);
623 return ret != NULL;
624}
625
618ebe9f
JS
626#endif
627
2d22c208
JS
628int start_async(struct async *async)
629{
ae6a5609
EFL
630 int need_in, need_out;
631 int fdin[2], fdout[2];
632 int proc_in, proc_out;
2d22c208 633
ae6a5609
EFL
634 need_in = async->in < 0;
635 if (need_in) {
636 if (pipe(fdin) < 0) {
637 if (async->out > 0)
638 close(async->out);
639 return error("cannot create pipe: %s", strerror(errno));
640 }
641 async->in = fdin[1];
642 }
643
644 need_out = async->out < 0;
645 if (need_out) {
646 if (pipe(fdout) < 0) {
647 if (need_in)
648 close_pair(fdin);
649 else if (async->in)
650 close(async->in);
651 return error("cannot create pipe: %s", strerror(errno));
652 }
653 async->out = fdout[0];
654 }
655
656 if (need_in)
657 proc_in = fdin[0];
658 else if (async->in)
659 proc_in = async->in;
660 else
661 proc_in = -1;
662
663 if (need_out)
664 proc_out = fdout[1];
665 else if (async->out)
666 proc_out = async->out;
667 else
668 proc_out = -1;
2d22c208 669
f6b60983 670#ifdef NO_PTHREADS
2c3766f0
AM
671 /* Flush stdio before fork() to avoid cloning buffers */
672 fflush(NULL);
673
2d22c208
JS
674 async->pid = fork();
675 if (async->pid < 0) {
676 error("fork (async) failed: %s", strerror(errno));
ae6a5609 677 goto error;
2d22c208
JS
678 }
679 if (!async->pid) {
ae6a5609
EFL
680 if (need_in)
681 close(fdin[1]);
682 if (need_out)
683 close(fdout[0]);
684 exit(!!async->proc(proc_in, proc_out, async->data));
2d22c208 685 }
ae6a5609 686
afe19ff7
JK
687 mark_child_for_cleanup(async->pid);
688
ae6a5609
EFL
689 if (need_in)
690 close(fdin[0]);
691 else if (async->in)
692 close(async->in);
693
694 if (need_out)
695 close(fdout[1]);
696 else if (async->out)
697 close(async->out);
618ebe9f 698#else
0ea1c89b
JS
699 if (!main_thread_set) {
700 /*
701 * We assume that the first time that start_async is called
702 * it is from the main thread.
703 */
704 main_thread_set = 1;
705 main_thread = pthread_self();
706 pthread_key_create(&async_key, NULL);
1ece66bc 707 pthread_key_create(&async_die_counter, NULL);
0ea1c89b 708 set_die_routine(die_async);
1ece66bc 709 set_die_is_recursing_routine(async_die_is_recursing);
0ea1c89b
JS
710 }
711
200a76b7
JS
712 if (proc_in >= 0)
713 set_cloexec(proc_in);
714 if (proc_out >= 0)
715 set_cloexec(proc_out);
ae6a5609
EFL
716 async->proc_in = proc_in;
717 async->proc_out = proc_out;
200a76b7
JS
718 {
719 int err = pthread_create(&async->tid, NULL, run_thread, async);
720 if (err) {
721 error("cannot create thread: %s", strerror(err));
722 goto error;
723 }
618ebe9f
JS
724 }
725#endif
2d22c208 726 return 0;
ae6a5609
EFL
727
728error:
729 if (need_in)
730 close_pair(fdin);
731 else if (async->in)
732 close(async->in);
733
734 if (need_out)
735 close_pair(fdout);
736 else if (async->out)
737 close(async->out);
738 return -1;
2d22c208
JS
739}
740
741int finish_async(struct async *async)
742{
f6b60983 743#ifdef NO_PTHREADS
0398fc34 744 return wait_or_whine(async->pid, "child process");
618ebe9f 745#else
200a76b7
JS
746 void *ret = (void *)(intptr_t)(-1);
747
748 if (pthread_join(async->tid, &ret))
749 error("pthread_join failed");
750 return (int)(intptr_t)ret;
618ebe9f 751#endif
2d22c208 752}
ae98a008 753
5a7da2dc
AS
754char *find_hook(const char *name)
755{
756 char *path = git_path("hooks/%s", name);
757 if (access(path, X_OK) < 0)
758 path = NULL;
759
760 return path;
761}
762
ae98a008
SB
763int run_hook(const char *index_file, const char *name, ...)
764{
765 struct child_process hook;
5d40a179
JK
766 struct argv_array argv = ARGV_ARRAY_INIT;
767 const char *p, *env[2];
ae98a008
SB
768 char index[PATH_MAX];
769 va_list args;
770 int ret;
ae98a008 771
5a7da2dc
AS
772 p = find_hook(name);
773 if (!p)
cf94ca8e
SB
774 return 0;
775
5a7da2dc
AS
776 argv_array_push(&argv, p);
777
ae98a008 778 va_start(args, name);
5d40a179
JK
779 while ((p = va_arg(args, const char *)))
780 argv_array_push(&argv, p);
ae98a008
SB
781 va_end(args);
782
ae98a008 783 memset(&hook, 0, sizeof(hook));
5d40a179 784 hook.argv = argv.argv;
ae98a008
SB
785 hook.no_stdin = 1;
786 hook.stdout_to_stderr = 1;
787 if (index_file) {
788 snprintf(index, sizeof(index), "GIT_INDEX_FILE=%s", index_file);
789 env[0] = index;
790 env[1] = NULL;
791 hook.env = env;
792 }
793
0ac77ec3 794 ret = run_command(&hook);
5d40a179 795 argv_array_clear(&argv);
ae98a008
SB
796 return ret;
797}