]>
Commit | Line | Data |
---|---|---|
b1bf95bb JW |
1 | #include "cache.h" |
2 | #include "run-command.h" | |
77cb17e9 | 3 | #include "exec_cmd.h" |
b1bf95bb | 4 | |
9dc09c76 SP |
5 | static inline void close_pair(int fd[2]) |
6 | { | |
7 | close(fd[0]); | |
8 | close(fd[1]); | |
9 | } | |
10 | ||
75301f90 | 11 | #ifndef WIN32 |
e4507ae8 SP |
12 | static inline void dup_devnull(int to) |
13 | { | |
14 | int fd = open("/dev/null", O_RDWR); | |
15 | dup2(fd, to); | |
16 | close(fd); | |
17 | } | |
75301f90 | 18 | #endif |
e4507ae8 | 19 | |
8dba1e63 JK |
20 | static const char **prepare_shell_cmd(const char **argv) |
21 | { | |
22 | int argc, nargc = 0; | |
23 | const char **nargv; | |
24 | ||
25 | for (argc = 0; argv[argc]; argc++) | |
26 | ; /* just counting */ | |
27 | /* +1 for NULL, +3 for "sh -c" plus extra $0 */ | |
28 | nargv = xmalloc(sizeof(*nargv) * (argc + 1 + 3)); | |
29 | ||
30 | if (argc < 1) | |
31 | die("BUG: shell command is empty"); | |
32 | ||
f445644f JK |
33 | if (strcspn(argv[0], "|&;<>()$`\\\"' \t\n*?[#~=%") != strlen(argv[0])) { |
34 | nargv[nargc++] = "sh"; | |
35 | nargv[nargc++] = "-c"; | |
8dba1e63 | 36 | |
f445644f JK |
37 | if (argc < 2) |
38 | nargv[nargc++] = argv[0]; | |
39 | else { | |
40 | struct strbuf arg0 = STRBUF_INIT; | |
41 | strbuf_addf(&arg0, "%s \"$@\"", argv[0]); | |
42 | nargv[nargc++] = strbuf_detach(&arg0, NULL); | |
43 | } | |
8dba1e63 JK |
44 | } |
45 | ||
46 | for (argc = 0; argv[argc]; argc++) | |
47 | nargv[nargc++] = argv[argc]; | |
48 | nargv[nargc] = NULL; | |
49 | ||
50 | return nargv; | |
51 | } | |
52 | ||
53 | #ifndef WIN32 | |
54 | static int execv_shell_cmd(const char **argv) | |
55 | { | |
56 | const char **nargv = prepare_shell_cmd(argv); | |
57 | trace_argv_printf(nargv, "trace: exec:"); | |
58 | execvp(nargv[0], (char **)nargv); | |
59 | free(nargv); | |
60 | return -1; | |
61 | } | |
62 | #endif | |
63 | ||
a5487ddf JS |
64 | #ifndef WIN32 |
65 | static int child_err = 2; | |
2b541bf8 JS |
66 | static int child_notifier = -1; |
67 | ||
68 | static void notify_parent(void) | |
69 | { | |
a111eb78 JN |
70 | /* |
71 | * execvp failed. If possible, we'd like to let start_command | |
72 | * know, so failures like ENOENT can be handled right away; but | |
73 | * otherwise, finish_command will still report the error. | |
74 | */ | |
75 | xwrite(child_notifier, "", 1); | |
2b541bf8 | 76 | } |
a5487ddf JS |
77 | |
78 | static NORETURN void die_child(const char *err, va_list params) | |
79 | { | |
3bc4181f | 80 | vwritef(child_err, "fatal: ", err, params); |
a5487ddf JS |
81 | exit(128); |
82 | } | |
3bc4181f CB |
83 | |
84 | static void error_child(const char *err, va_list params) | |
85 | { | |
86 | vwritef(child_err, "error: ", err, params); | |
87 | } | |
200a76b7 | 88 | #endif |
a5487ddf JS |
89 | |
90 | static inline void set_cloexec(int fd) | |
91 | { | |
92 | int flags = fcntl(fd, F_GETFD); | |
93 | if (flags >= 0) | |
94 | fcntl(fd, F_SETFD, flags | FD_CLOEXEC); | |
95 | } | |
a5487ddf | 96 | |
ab0b41da JS |
97 | static int wait_or_whine(pid_t pid, const char *argv0, int silent_exec_failure) |
98 | { | |
99 | int status, code = -1; | |
100 | pid_t waiting; | |
101 | int failed_errno = 0; | |
102 | ||
103 | while ((waiting = waitpid(pid, &status, 0)) < 0 && errno == EINTR) | |
104 | ; /* nothing */ | |
105 | ||
106 | if (waiting < 0) { | |
107 | failed_errno = errno; | |
108 | error("waitpid for %s failed: %s", argv0, strerror(errno)); | |
109 | } else if (waiting != pid) { | |
110 | error("waitpid is confused (%s)", argv0); | |
111 | } else if (WIFSIGNALED(status)) { | |
112 | code = WTERMSIG(status); | |
113 | error("%s died of signal %d", argv0, code); | |
114 | /* | |
115 | * This return value is chosen so that code & 0xff | |
116 | * mimics the exit code that a POSIX shell would report for | |
117 | * a program that died from this signal. | |
118 | */ | |
119 | code -= 128; | |
120 | } else if (WIFEXITED(status)) { | |
121 | code = WEXITSTATUS(status); | |
122 | /* | |
123 | * Convert special exit code when execvp failed. | |
124 | */ | |
125 | if (code == 127) { | |
126 | code = -1; | |
127 | failed_errno = ENOENT; | |
ab0b41da JS |
128 | } |
129 | } else { | |
130 | error("waitpid is confused (%s)", argv0); | |
131 | } | |
132 | errno = failed_errno; | |
133 | return code; | |
134 | } | |
135 | ||
ebcb5d16 | 136 | int start_command(struct child_process *cmd) |
b1bf95bb | 137 | { |
f3b33f1d JS |
138 | int need_in, need_out, need_err; |
139 | int fdin[2], fdout[2], fderr[2]; | |
5a7a3671 | 140 | int failed_errno = failed_errno; |
4919bf03 | 141 | |
c20181e3 JS |
142 | /* |
143 | * In case of errors we must keep the promise to close FDs | |
144 | * that have been passed in via ->in and ->out. | |
145 | */ | |
146 | ||
e4507ae8 | 147 | need_in = !cmd->no_stdin && cmd->in < 0; |
4919bf03 | 148 | if (need_in) { |
c20181e3 | 149 | if (pipe(fdin) < 0) { |
0ac77ec3 | 150 | failed_errno = errno; |
c20181e3 JS |
151 | if (cmd->out > 0) |
152 | close(cmd->out); | |
0ac77ec3 | 153 | goto fail_pipe; |
c20181e3 | 154 | } |
4919bf03 | 155 | cmd->in = fdin[1]; |
4919bf03 SP |
156 | } |
157 | ||
e4507ae8 SP |
158 | need_out = !cmd->no_stdout |
159 | && !cmd->stdout_to_stderr | |
160 | && cmd->out < 0; | |
f4bba25b SP |
161 | if (need_out) { |
162 | if (pipe(fdout) < 0) { | |
0ac77ec3 | 163 | failed_errno = errno; |
f4bba25b SP |
164 | if (need_in) |
165 | close_pair(fdin); | |
c20181e3 JS |
166 | else if (cmd->in) |
167 | close(cmd->in); | |
0ac77ec3 | 168 | goto fail_pipe; |
f4bba25b SP |
169 | } |
170 | cmd->out = fdout[0]; | |
f4bba25b SP |
171 | } |
172 | ||
b73a4397 | 173 | need_err = !cmd->no_stderr && cmd->err < 0; |
f3b33f1d JS |
174 | if (need_err) { |
175 | if (pipe(fderr) < 0) { | |
0ac77ec3 | 176 | failed_errno = errno; |
f3b33f1d JS |
177 | if (need_in) |
178 | close_pair(fdin); | |
c20181e3 JS |
179 | else if (cmd->in) |
180 | close(cmd->in); | |
f3b33f1d JS |
181 | if (need_out) |
182 | close_pair(fdout); | |
c20181e3 JS |
183 | else if (cmd->out) |
184 | close(cmd->out); | |
0ac77ec3 JS |
185 | fail_pipe: |
186 | error("cannot create pipe for %s: %s", | |
187 | cmd->argv[0], strerror(failed_errno)); | |
188 | errno = failed_errno; | |
189 | return -1; | |
f3b33f1d JS |
190 | } |
191 | cmd->err = fderr[0]; | |
192 | } | |
193 | ||
8852f5d7 | 194 | trace_argv_printf(cmd->argv, "trace: run_command:"); |
13af8cbd | 195 | fflush(NULL); |
8852f5d7 | 196 | |
71064e3f | 197 | #ifndef WIN32 |
2b541bf8 JS |
198 | { |
199 | int notify_pipe[2]; | |
200 | if (pipe(notify_pipe)) | |
201 | notify_pipe[0] = notify_pipe[1] = -1; | |
202 | ||
ebcb5d16 | 203 | cmd->pid = fork(); |
ebcb5d16 | 204 | if (!cmd->pid) { |
a5487ddf JS |
205 | /* |
206 | * Redirect the channel to write syscall error messages to | |
207 | * before redirecting the process's stderr so that all die() | |
208 | * in subsequent call paths use the parent's stderr. | |
209 | */ | |
210 | if (cmd->no_stderr || need_err) { | |
211 | child_err = dup(2); | |
212 | set_cloexec(child_err); | |
213 | } | |
214 | set_die_routine(die_child); | |
3bc4181f | 215 | set_error_routine(error_child); |
a5487ddf | 216 | |
2b541bf8 JS |
217 | close(notify_pipe[0]); |
218 | set_cloexec(notify_pipe[1]); | |
219 | child_notifier = notify_pipe[1]; | |
220 | atexit(notify_parent); | |
221 | ||
e4507ae8 SP |
222 | if (cmd->no_stdin) |
223 | dup_devnull(0); | |
224 | else if (need_in) { | |
4919bf03 | 225 | dup2(fdin[0], 0); |
9dc09c76 | 226 | close_pair(fdin); |
4919bf03 SP |
227 | } else if (cmd->in) { |
228 | dup2(cmd->in, 0); | |
229 | close(cmd->in); | |
95d3c4f5 | 230 | } |
4919bf03 | 231 | |
ce2cf27a CC |
232 | if (cmd->no_stderr) |
233 | dup_devnull(2); | |
234 | else if (need_err) { | |
235 | dup2(fderr[1], 2); | |
236 | close_pair(fderr); | |
4f41b611 SP |
237 | } else if (cmd->err > 1) { |
238 | dup2(cmd->err, 2); | |
239 | close(cmd->err); | |
ce2cf27a CC |
240 | } |
241 | ||
e4507ae8 SP |
242 | if (cmd->no_stdout) |
243 | dup_devnull(1); | |
244 | else if (cmd->stdout_to_stderr) | |
cd83c74c | 245 | dup2(2, 1); |
f4bba25b SP |
246 | else if (need_out) { |
247 | dup2(fdout[1], 1); | |
248 | close_pair(fdout); | |
249 | } else if (cmd->out > 1) { | |
250 | dup2(cmd->out, 1); | |
251 | close(cmd->out); | |
252 | } | |
253 | ||
1568fea0 | 254 | if (cmd->dir && chdir(cmd->dir)) |
d824cbba TR |
255 | die_errno("exec '%s': cd to '%s' failed", cmd->argv[0], |
256 | cmd->dir); | |
ee493148 | 257 | if (cmd->env) { |
3427b375 AR |
258 | for (; *cmd->env; cmd->env++) { |
259 | if (strchr(*cmd->env, '=')) | |
4b25d091 | 260 | putenv((char *)*cmd->env); |
3427b375 AR |
261 | else |
262 | unsetenv(*cmd->env); | |
263 | } | |
ee493148 | 264 | } |
2b541bf8 JS |
265 | if (cmd->preexec_cb) { |
266 | /* | |
267 | * We cannot predict what the pre-exec callback does. | |
268 | * Forgo parent notification. | |
269 | */ | |
270 | close(child_notifier); | |
271 | child_notifier = -1; | |
272 | ||
ccf08bc3 | 273 | cmd->preexec_cb(); |
2b541bf8 | 274 | } |
f1000898 SP |
275 | if (cmd->git_cmd) { |
276 | execv_git_cmd(cmd->argv); | |
8dba1e63 JK |
277 | } else if (cmd->use_shell) { |
278 | execv_shell_cmd(cmd->argv); | |
77cb17e9 | 279 | } else { |
f1000898 | 280 | execvp(cmd->argv[0], (char *const*) cmd->argv); |
128aed68 | 281 | } |
fc1b56f0 CB |
282 | if (errno == ENOENT) { |
283 | if (!cmd->silent_exec_failure) | |
284 | error("cannot run %s: %s", cmd->argv[0], | |
285 | strerror(ENOENT)); | |
a5487ddf | 286 | exit(127); |
fc1b56f0 | 287 | } else { |
a5487ddf | 288 | die_errno("cannot exec '%s'", cmd->argv[0]); |
fc1b56f0 | 289 | } |
b1bf95bb | 290 | } |
0ac77ec3 JS |
291 | if (cmd->pid < 0) |
292 | error("cannot fork() for %s: %s", cmd->argv[0], | |
293 | strerror(failed_errno = errno)); | |
2b541bf8 JS |
294 | |
295 | /* | |
296 | * Wait for child's execvp. If the execvp succeeds (or if fork() | |
297 | * failed), EOF is seen immediately by the parent. Otherwise, the | |
298 | * child process sends a single byte. | |
299 | * Note that use of this infrastructure is completely advisory, | |
300 | * therefore, we keep error checks minimal. | |
301 | */ | |
302 | close(notify_pipe[1]); | |
303 | if (read(notify_pipe[0], ¬ify_pipe[1], 1) == 1) { | |
304 | /* | |
305 | * At this point we know that fork() succeeded, but execvp() | |
306 | * failed. Errors have been reported to our stderr. | |
307 | */ | |
308 | wait_or_whine(cmd->pid, cmd->argv[0], | |
309 | cmd->silent_exec_failure); | |
310 | failed_errno = errno; | |
311 | cmd->pid = -1; | |
312 | } | |
313 | close(notify_pipe[0]); | |
314 | } | |
ba26f296 | 315 | #else |
0d30ad71 | 316 | { |
75301f90 | 317 | int fhin = 0, fhout = 1, fherr = 2; |
108ac313 | 318 | const char **sargv = cmd->argv; |
ba26f296 | 319 | char **env = environ; |
ba26f296 | 320 | |
75301f90 JS |
321 | if (cmd->no_stdin) |
322 | fhin = open("/dev/null", O_RDWR); | |
323 | else if (need_in) | |
324 | fhin = dup(fdin[0]); | |
325 | else if (cmd->in) | |
326 | fhin = dup(cmd->in); | |
327 | ||
328 | if (cmd->no_stderr) | |
329 | fherr = open("/dev/null", O_RDWR); | |
330 | else if (need_err) | |
331 | fherr = dup(fderr[1]); | |
76d44c8c JH |
332 | else if (cmd->err > 2) |
333 | fherr = dup(cmd->err); | |
75301f90 JS |
334 | |
335 | if (cmd->no_stdout) | |
336 | fhout = open("/dev/null", O_RDWR); | |
337 | else if (cmd->stdout_to_stderr) | |
338 | fhout = dup(fherr); | |
339 | else if (need_out) | |
340 | fhout = dup(fdout[1]); | |
341 | else if (cmd->out > 1) | |
342 | fhout = dup(cmd->out); | |
ba26f296 | 343 | |
2affea41 JS |
344 | if (cmd->env) |
345 | env = make_augmented_environ(cmd->env); | |
ba26f296 JS |
346 | |
347 | if (cmd->git_cmd) { | |
108ac313 | 348 | cmd->argv = prepare_git_cmd(cmd->argv); |
8dba1e63 JK |
349 | } else if (cmd->use_shell) { |
350 | cmd->argv = prepare_shell_cmd(cmd->argv); | |
ba26f296 JS |
351 | } |
352 | ||
f9a2743c | 353 | cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, env, cmd->dir, |
75301f90 | 354 | fhin, fhout, fherr); |
0ac77ec3 | 355 | failed_errno = errno; |
c024beb5 | 356 | if (cmd->pid < 0 && (!cmd->silent_exec_failure || errno != ENOENT)) |
0ac77ec3 | 357 | error("cannot spawn %s: %s", cmd->argv[0], strerror(errno)); |
ba26f296 JS |
358 | |
359 | if (cmd->env) | |
360 | free_environ(env); | |
361 | if (cmd->git_cmd) | |
108ac313 | 362 | free(cmd->argv); |
ba26f296 | 363 | |
108ac313 | 364 | cmd->argv = sargv; |
75301f90 JS |
365 | if (fhin != 0) |
366 | close(fhin); | |
367 | if (fhout != 1) | |
368 | close(fhout); | |
369 | if (fherr != 2) | |
370 | close(fherr); | |
0d30ad71 | 371 | } |
ba26f296 JS |
372 | #endif |
373 | ||
374 | if (cmd->pid < 0) { | |
375 | if (need_in) | |
376 | close_pair(fdin); | |
377 | else if (cmd->in) | |
378 | close(cmd->in); | |
379 | if (need_out) | |
380 | close_pair(fdout); | |
381 | else if (cmd->out) | |
382 | close(cmd->out); | |
383 | if (need_err) | |
384 | close_pair(fderr); | |
fc012c28 D |
385 | else if (cmd->err) |
386 | close(cmd->err); | |
0ac77ec3 JS |
387 | errno = failed_errno; |
388 | return -1; | |
ba26f296 | 389 | } |
4919bf03 SP |
390 | |
391 | if (need_in) | |
392 | close(fdin[0]); | |
393 | else if (cmd->in) | |
394 | close(cmd->in); | |
395 | ||
f4bba25b SP |
396 | if (need_out) |
397 | close(fdout[1]); | |
c20181e3 | 398 | else if (cmd->out) |
f4bba25b SP |
399 | close(cmd->out); |
400 | ||
f3b33f1d JS |
401 | if (need_err) |
402 | close(fderr[1]); | |
4f41b611 SP |
403 | else if (cmd->err) |
404 | close(cmd->err); | |
f3b33f1d | 405 | |
ebcb5d16 SP |
406 | return 0; |
407 | } | |
408 | ||
2d22c208 JS |
409 | int finish_command(struct child_process *cmd) |
410 | { | |
c024beb5 | 411 | return wait_or_whine(cmd->pid, cmd->argv[0], cmd->silent_exec_failure); |
2d22c208 JS |
412 | } |
413 | ||
ebcb5d16 SP |
414 | int run_command(struct child_process *cmd) |
415 | { | |
416 | int code = start_command(cmd); | |
417 | if (code) | |
418 | return code; | |
419 | return finish_command(cmd); | |
420 | } | |
421 | ||
1568fea0 | 422 | static void prepare_run_command_v_opt(struct child_process *cmd, |
ee493148 AR |
423 | const char **argv, |
424 | int opt) | |
1568fea0 AR |
425 | { |
426 | memset(cmd, 0, sizeof(*cmd)); | |
427 | cmd->argv = argv; | |
428 | cmd->no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0; | |
429 | cmd->git_cmd = opt & RUN_GIT_CMD ? 1 : 0; | |
430 | cmd->stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0; | |
c024beb5 | 431 | cmd->silent_exec_failure = opt & RUN_SILENT_EXEC_FAILURE ? 1 : 0; |
8dba1e63 | 432 | cmd->use_shell = opt & RUN_USING_SHELL ? 1 : 0; |
1568fea0 AR |
433 | } |
434 | ||
f1000898 SP |
435 | int run_command_v_opt(const char **argv, int opt) |
436 | { | |
437 | struct child_process cmd; | |
1568fea0 AR |
438 | prepare_run_command_v_opt(&cmd, argv, opt); |
439 | return run_command(&cmd); | |
440 | } | |
441 | ||
ee493148 AR |
442 | int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env) |
443 | { | |
444 | struct child_process cmd; | |
445 | prepare_run_command_v_opt(&cmd, argv, opt); | |
446 | cmd.dir = dir; | |
447 | cmd.env = env; | |
448 | return run_command(&cmd); | |
449 | } | |
2d22c208 | 450 | |
f6b60983 | 451 | #ifndef NO_PTHREADS |
0ea1c89b JS |
452 | static pthread_t main_thread; |
453 | static int main_thread_set; | |
454 | static pthread_key_t async_key; | |
455 | ||
200a76b7 | 456 | static void *run_thread(void *data) |
618ebe9f JS |
457 | { |
458 | struct async *async = data; | |
f6b60983 | 459 | intptr_t ret; |
0ea1c89b JS |
460 | |
461 | pthread_setspecific(async_key, async); | |
f6b60983 | 462 | ret = async->proc(async->proc_in, async->proc_out, async->data); |
200a76b7 | 463 | return (void *)ret; |
618ebe9f | 464 | } |
0ea1c89b JS |
465 | |
466 | static NORETURN void die_async(const char *err, va_list params) | |
467 | { | |
468 | vreportf("fatal: ", err, params); | |
469 | ||
470 | if (!pthread_equal(main_thread, pthread_self())) { | |
471 | struct async *async = pthread_getspecific(async_key); | |
472 | if (async->proc_in >= 0) | |
473 | close(async->proc_in); | |
474 | if (async->proc_out >= 0) | |
475 | close(async->proc_out); | |
476 | pthread_exit((void *)128); | |
477 | } | |
478 | ||
479 | exit(128); | |
618ebe9f JS |
480 | } |
481 | #endif | |
482 | ||
2d22c208 JS |
483 | int start_async(struct async *async) |
484 | { | |
ae6a5609 EFL |
485 | int need_in, need_out; |
486 | int fdin[2], fdout[2]; | |
487 | int proc_in, proc_out; | |
2d22c208 | 488 | |
ae6a5609 EFL |
489 | need_in = async->in < 0; |
490 | if (need_in) { | |
491 | if (pipe(fdin) < 0) { | |
492 | if (async->out > 0) | |
493 | close(async->out); | |
494 | return error("cannot create pipe: %s", strerror(errno)); | |
495 | } | |
496 | async->in = fdin[1]; | |
497 | } | |
498 | ||
499 | need_out = async->out < 0; | |
500 | if (need_out) { | |
501 | if (pipe(fdout) < 0) { | |
502 | if (need_in) | |
503 | close_pair(fdin); | |
504 | else if (async->in) | |
505 | close(async->in); | |
506 | return error("cannot create pipe: %s", strerror(errno)); | |
507 | } | |
508 | async->out = fdout[0]; | |
509 | } | |
510 | ||
511 | if (need_in) | |
512 | proc_in = fdin[0]; | |
513 | else if (async->in) | |
514 | proc_in = async->in; | |
515 | else | |
516 | proc_in = -1; | |
517 | ||
518 | if (need_out) | |
519 | proc_out = fdout[1]; | |
520 | else if (async->out) | |
521 | proc_out = async->out; | |
522 | else | |
523 | proc_out = -1; | |
2d22c208 | 524 | |
f6b60983 | 525 | #ifdef NO_PTHREADS |
2c3766f0 AM |
526 | /* Flush stdio before fork() to avoid cloning buffers */ |
527 | fflush(NULL); | |
528 | ||
2d22c208 JS |
529 | async->pid = fork(); |
530 | if (async->pid < 0) { | |
531 | error("fork (async) failed: %s", strerror(errno)); | |
ae6a5609 | 532 | goto error; |
2d22c208 JS |
533 | } |
534 | if (!async->pid) { | |
ae6a5609 EFL |
535 | if (need_in) |
536 | close(fdin[1]); | |
537 | if (need_out) | |
538 | close(fdout[0]); | |
539 | exit(!!async->proc(proc_in, proc_out, async->data)); | |
2d22c208 | 540 | } |
ae6a5609 EFL |
541 | |
542 | if (need_in) | |
543 | close(fdin[0]); | |
544 | else if (async->in) | |
545 | close(async->in); | |
546 | ||
547 | if (need_out) | |
548 | close(fdout[1]); | |
549 | else if (async->out) | |
550 | close(async->out); | |
618ebe9f | 551 | #else |
0ea1c89b JS |
552 | if (!main_thread_set) { |
553 | /* | |
554 | * We assume that the first time that start_async is called | |
555 | * it is from the main thread. | |
556 | */ | |
557 | main_thread_set = 1; | |
558 | main_thread = pthread_self(); | |
559 | pthread_key_create(&async_key, NULL); | |
560 | set_die_routine(die_async); | |
561 | } | |
562 | ||
200a76b7 JS |
563 | if (proc_in >= 0) |
564 | set_cloexec(proc_in); | |
565 | if (proc_out >= 0) | |
566 | set_cloexec(proc_out); | |
ae6a5609 EFL |
567 | async->proc_in = proc_in; |
568 | async->proc_out = proc_out; | |
200a76b7 JS |
569 | { |
570 | int err = pthread_create(&async->tid, NULL, run_thread, async); | |
571 | if (err) { | |
572 | error("cannot create thread: %s", strerror(err)); | |
573 | goto error; | |
574 | } | |
618ebe9f JS |
575 | } |
576 | #endif | |
2d22c208 | 577 | return 0; |
ae6a5609 EFL |
578 | |
579 | error: | |
580 | if (need_in) | |
581 | close_pair(fdin); | |
582 | else if (async->in) | |
583 | close(async->in); | |
584 | ||
585 | if (need_out) | |
586 | close_pair(fdout); | |
587 | else if (async->out) | |
588 | close(async->out); | |
589 | return -1; | |
2d22c208 JS |
590 | } |
591 | ||
592 | int finish_async(struct async *async) | |
593 | { | |
f6b60983 | 594 | #ifdef NO_PTHREADS |
200a76b7 | 595 | return wait_or_whine(async->pid, "child process", 0); |
618ebe9f | 596 | #else |
200a76b7 JS |
597 | void *ret = (void *)(intptr_t)(-1); |
598 | ||
599 | if (pthread_join(async->tid, &ret)) | |
600 | error("pthread_join failed"); | |
601 | return (int)(intptr_t)ret; | |
618ebe9f | 602 | #endif |
2d22c208 | 603 | } |
ae98a008 SB |
604 | |
605 | int run_hook(const char *index_file, const char *name, ...) | |
606 | { | |
607 | struct child_process hook; | |
14e6298f | 608 | const char **argv = NULL, *env[2]; |
ae98a008 SB |
609 | char index[PATH_MAX]; |
610 | va_list args; | |
611 | int ret; | |
14e6298f | 612 | size_t i = 0, alloc = 0; |
ae98a008 | 613 | |
cf94ca8e SB |
614 | if (access(git_path("hooks/%s", name), X_OK) < 0) |
615 | return 0; | |
616 | ||
ae98a008 | 617 | va_start(args, name); |
14e6298f SB |
618 | ALLOC_GROW(argv, i + 1, alloc); |
619 | argv[i++] = git_path("hooks/%s", name); | |
620 | while (argv[i-1]) { | |
621 | ALLOC_GROW(argv, i + 1, alloc); | |
622 | argv[i++] = va_arg(args, const char *); | |
623 | } | |
ae98a008 SB |
624 | va_end(args); |
625 | ||
ae98a008 SB |
626 | memset(&hook, 0, sizeof(hook)); |
627 | hook.argv = argv; | |
628 | hook.no_stdin = 1; | |
629 | hook.stdout_to_stderr = 1; | |
630 | if (index_file) { | |
631 | snprintf(index, sizeof(index), "GIT_INDEX_FILE=%s", index_file); | |
632 | env[0] = index; | |
633 | env[1] = NULL; | |
634 | hook.env = env; | |
635 | } | |
636 | ||
0ac77ec3 | 637 | ret = run_command(&hook); |
14e6298f | 638 | free(argv); |
ae98a008 SB |
639 | return ret; |
640 | } |