]>
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; | |
128 | if (!silent_exec_failure) | |
129 | error("cannot run %s: %s", argv0, | |
130 | strerror(ENOENT)); | |
131 | } | |
132 | } else { | |
133 | error("waitpid is confused (%s)", argv0); | |
134 | } | |
135 | errno = failed_errno; | |
136 | return code; | |
137 | } | |
138 | ||
ebcb5d16 | 139 | int start_command(struct child_process *cmd) |
b1bf95bb | 140 | { |
f3b33f1d JS |
141 | int need_in, need_out, need_err; |
142 | int fdin[2], fdout[2], fderr[2]; | |
5a7a3671 | 143 | int failed_errno = failed_errno; |
4919bf03 | 144 | |
c20181e3 JS |
145 | /* |
146 | * In case of errors we must keep the promise to close FDs | |
147 | * that have been passed in via ->in and ->out. | |
148 | */ | |
149 | ||
e4507ae8 | 150 | need_in = !cmd->no_stdin && cmd->in < 0; |
4919bf03 | 151 | if (need_in) { |
c20181e3 | 152 | if (pipe(fdin) < 0) { |
0ac77ec3 | 153 | failed_errno = errno; |
c20181e3 JS |
154 | if (cmd->out > 0) |
155 | close(cmd->out); | |
0ac77ec3 | 156 | goto fail_pipe; |
c20181e3 | 157 | } |
4919bf03 | 158 | cmd->in = fdin[1]; |
4919bf03 SP |
159 | } |
160 | ||
e4507ae8 SP |
161 | need_out = !cmd->no_stdout |
162 | && !cmd->stdout_to_stderr | |
163 | && cmd->out < 0; | |
f4bba25b SP |
164 | if (need_out) { |
165 | if (pipe(fdout) < 0) { | |
0ac77ec3 | 166 | failed_errno = errno; |
f4bba25b SP |
167 | if (need_in) |
168 | close_pair(fdin); | |
c20181e3 JS |
169 | else if (cmd->in) |
170 | close(cmd->in); | |
0ac77ec3 | 171 | goto fail_pipe; |
f4bba25b SP |
172 | } |
173 | cmd->out = fdout[0]; | |
f4bba25b SP |
174 | } |
175 | ||
b73a4397 | 176 | need_err = !cmd->no_stderr && cmd->err < 0; |
f3b33f1d JS |
177 | if (need_err) { |
178 | if (pipe(fderr) < 0) { | |
0ac77ec3 | 179 | failed_errno = errno; |
f3b33f1d JS |
180 | if (need_in) |
181 | close_pair(fdin); | |
c20181e3 JS |
182 | else if (cmd->in) |
183 | close(cmd->in); | |
f3b33f1d JS |
184 | if (need_out) |
185 | close_pair(fdout); | |
c20181e3 JS |
186 | else if (cmd->out) |
187 | close(cmd->out); | |
0ac77ec3 JS |
188 | fail_pipe: |
189 | error("cannot create pipe for %s: %s", | |
190 | cmd->argv[0], strerror(failed_errno)); | |
191 | errno = failed_errno; | |
192 | return -1; | |
f3b33f1d JS |
193 | } |
194 | cmd->err = fderr[0]; | |
195 | } | |
196 | ||
8852f5d7 | 197 | trace_argv_printf(cmd->argv, "trace: run_command:"); |
13af8cbd | 198 | fflush(NULL); |
8852f5d7 | 199 | |
71064e3f | 200 | #ifndef WIN32 |
2b541bf8 JS |
201 | { |
202 | int notify_pipe[2]; | |
203 | if (pipe(notify_pipe)) | |
204 | notify_pipe[0] = notify_pipe[1] = -1; | |
205 | ||
ebcb5d16 | 206 | cmd->pid = fork(); |
ebcb5d16 | 207 | if (!cmd->pid) { |
a5487ddf JS |
208 | /* |
209 | * Redirect the channel to write syscall error messages to | |
210 | * before redirecting the process's stderr so that all die() | |
211 | * in subsequent call paths use the parent's stderr. | |
212 | */ | |
213 | if (cmd->no_stderr || need_err) { | |
214 | child_err = dup(2); | |
215 | set_cloexec(child_err); | |
216 | } | |
217 | set_die_routine(die_child); | |
3bc4181f | 218 | set_error_routine(error_child); |
a5487ddf | 219 | |
2b541bf8 JS |
220 | close(notify_pipe[0]); |
221 | set_cloexec(notify_pipe[1]); | |
222 | child_notifier = notify_pipe[1]; | |
223 | atexit(notify_parent); | |
224 | ||
e4507ae8 SP |
225 | if (cmd->no_stdin) |
226 | dup_devnull(0); | |
227 | else if (need_in) { | |
4919bf03 | 228 | dup2(fdin[0], 0); |
9dc09c76 | 229 | close_pair(fdin); |
4919bf03 SP |
230 | } else if (cmd->in) { |
231 | dup2(cmd->in, 0); | |
232 | close(cmd->in); | |
95d3c4f5 | 233 | } |
4919bf03 | 234 | |
ce2cf27a CC |
235 | if (cmd->no_stderr) |
236 | dup_devnull(2); | |
237 | else if (need_err) { | |
238 | dup2(fderr[1], 2); | |
239 | close_pair(fderr); | |
4f41b611 SP |
240 | } else if (cmd->err > 1) { |
241 | dup2(cmd->err, 2); | |
242 | close(cmd->err); | |
ce2cf27a CC |
243 | } |
244 | ||
e4507ae8 SP |
245 | if (cmd->no_stdout) |
246 | dup_devnull(1); | |
247 | else if (cmd->stdout_to_stderr) | |
cd83c74c | 248 | dup2(2, 1); |
f4bba25b SP |
249 | else if (need_out) { |
250 | dup2(fdout[1], 1); | |
251 | close_pair(fdout); | |
252 | } else if (cmd->out > 1) { | |
253 | dup2(cmd->out, 1); | |
254 | close(cmd->out); | |
255 | } | |
256 | ||
1568fea0 | 257 | if (cmd->dir && chdir(cmd->dir)) |
d824cbba TR |
258 | die_errno("exec '%s': cd to '%s' failed", cmd->argv[0], |
259 | cmd->dir); | |
ee493148 | 260 | if (cmd->env) { |
3427b375 AR |
261 | for (; *cmd->env; cmd->env++) { |
262 | if (strchr(*cmd->env, '=')) | |
4b25d091 | 263 | putenv((char *)*cmd->env); |
3427b375 AR |
264 | else |
265 | unsetenv(*cmd->env); | |
266 | } | |
ee493148 | 267 | } |
2b541bf8 JS |
268 | if (cmd->preexec_cb) { |
269 | /* | |
270 | * We cannot predict what the pre-exec callback does. | |
271 | * Forgo parent notification. | |
272 | */ | |
273 | close(child_notifier); | |
274 | child_notifier = -1; | |
275 | ||
ccf08bc3 | 276 | cmd->preexec_cb(); |
2b541bf8 | 277 | } |
f1000898 SP |
278 | if (cmd->git_cmd) { |
279 | execv_git_cmd(cmd->argv); | |
8dba1e63 JK |
280 | } else if (cmd->use_shell) { |
281 | execv_shell_cmd(cmd->argv); | |
77cb17e9 | 282 | } else { |
f1000898 | 283 | execvp(cmd->argv[0], (char *const*) cmd->argv); |
128aed68 | 284 | } |
a5487ddf JS |
285 | /* |
286 | * Do not check for cmd->silent_exec_failure; the parent | |
287 | * process will check it when it sees this exit code. | |
288 | */ | |
289 | if (errno == ENOENT) | |
290 | exit(127); | |
291 | else | |
292 | die_errno("cannot exec '%s'", cmd->argv[0]); | |
b1bf95bb | 293 | } |
0ac77ec3 JS |
294 | if (cmd->pid < 0) |
295 | error("cannot fork() for %s: %s", cmd->argv[0], | |
296 | strerror(failed_errno = errno)); | |
2b541bf8 JS |
297 | |
298 | /* | |
299 | * Wait for child's execvp. If the execvp succeeds (or if fork() | |
300 | * failed), EOF is seen immediately by the parent. Otherwise, the | |
301 | * child process sends a single byte. | |
302 | * Note that use of this infrastructure is completely advisory, | |
303 | * therefore, we keep error checks minimal. | |
304 | */ | |
305 | close(notify_pipe[1]); | |
306 | if (read(notify_pipe[0], ¬ify_pipe[1], 1) == 1) { | |
307 | /* | |
308 | * At this point we know that fork() succeeded, but execvp() | |
309 | * failed. Errors have been reported to our stderr. | |
310 | */ | |
311 | wait_or_whine(cmd->pid, cmd->argv[0], | |
312 | cmd->silent_exec_failure); | |
313 | failed_errno = errno; | |
314 | cmd->pid = -1; | |
315 | } | |
316 | close(notify_pipe[0]); | |
317 | } | |
ba26f296 | 318 | #else |
0d30ad71 | 319 | { |
75301f90 | 320 | int fhin = 0, fhout = 1, fherr = 2; |
108ac313 | 321 | const char **sargv = cmd->argv; |
ba26f296 | 322 | char **env = environ; |
ba26f296 | 323 | |
75301f90 JS |
324 | if (cmd->no_stdin) |
325 | fhin = open("/dev/null", O_RDWR); | |
326 | else if (need_in) | |
327 | fhin = dup(fdin[0]); | |
328 | else if (cmd->in) | |
329 | fhin = dup(cmd->in); | |
330 | ||
331 | if (cmd->no_stderr) | |
332 | fherr = open("/dev/null", O_RDWR); | |
333 | else if (need_err) | |
334 | fherr = dup(fderr[1]); | |
76d44c8c JH |
335 | else if (cmd->err > 2) |
336 | fherr = dup(cmd->err); | |
75301f90 JS |
337 | |
338 | if (cmd->no_stdout) | |
339 | fhout = open("/dev/null", O_RDWR); | |
340 | else if (cmd->stdout_to_stderr) | |
341 | fhout = dup(fherr); | |
342 | else if (need_out) | |
343 | fhout = dup(fdout[1]); | |
344 | else if (cmd->out > 1) | |
345 | fhout = dup(cmd->out); | |
ba26f296 | 346 | |
2affea41 JS |
347 | if (cmd->env) |
348 | env = make_augmented_environ(cmd->env); | |
ba26f296 JS |
349 | |
350 | if (cmd->git_cmd) { | |
108ac313 | 351 | cmd->argv = prepare_git_cmd(cmd->argv); |
8dba1e63 JK |
352 | } else if (cmd->use_shell) { |
353 | cmd->argv = prepare_shell_cmd(cmd->argv); | |
ba26f296 JS |
354 | } |
355 | ||
f9a2743c | 356 | cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, env, cmd->dir, |
75301f90 | 357 | fhin, fhout, fherr); |
0ac77ec3 | 358 | failed_errno = errno; |
c024beb5 | 359 | if (cmd->pid < 0 && (!cmd->silent_exec_failure || errno != ENOENT)) |
0ac77ec3 | 360 | error("cannot spawn %s: %s", cmd->argv[0], strerror(errno)); |
ba26f296 JS |
361 | |
362 | if (cmd->env) | |
363 | free_environ(env); | |
364 | if (cmd->git_cmd) | |
108ac313 | 365 | free(cmd->argv); |
ba26f296 | 366 | |
108ac313 | 367 | cmd->argv = sargv; |
75301f90 JS |
368 | if (fhin != 0) |
369 | close(fhin); | |
370 | if (fhout != 1) | |
371 | close(fhout); | |
372 | if (fherr != 2) | |
373 | close(fherr); | |
0d30ad71 | 374 | } |
ba26f296 JS |
375 | #endif |
376 | ||
377 | if (cmd->pid < 0) { | |
378 | if (need_in) | |
379 | close_pair(fdin); | |
380 | else if (cmd->in) | |
381 | close(cmd->in); | |
382 | if (need_out) | |
383 | close_pair(fdout); | |
384 | else if (cmd->out) | |
385 | close(cmd->out); | |
386 | if (need_err) | |
387 | close_pair(fderr); | |
fc012c28 D |
388 | else if (cmd->err) |
389 | close(cmd->err); | |
0ac77ec3 JS |
390 | errno = failed_errno; |
391 | return -1; | |
ba26f296 | 392 | } |
4919bf03 SP |
393 | |
394 | if (need_in) | |
395 | close(fdin[0]); | |
396 | else if (cmd->in) | |
397 | close(cmd->in); | |
398 | ||
f4bba25b SP |
399 | if (need_out) |
400 | close(fdout[1]); | |
c20181e3 | 401 | else if (cmd->out) |
f4bba25b SP |
402 | close(cmd->out); |
403 | ||
f3b33f1d JS |
404 | if (need_err) |
405 | close(fderr[1]); | |
4f41b611 SP |
406 | else if (cmd->err) |
407 | close(cmd->err); | |
f3b33f1d | 408 | |
ebcb5d16 SP |
409 | return 0; |
410 | } | |
411 | ||
2d22c208 JS |
412 | int finish_command(struct child_process *cmd) |
413 | { | |
c024beb5 | 414 | return wait_or_whine(cmd->pid, cmd->argv[0], cmd->silent_exec_failure); |
2d22c208 JS |
415 | } |
416 | ||
ebcb5d16 SP |
417 | int run_command(struct child_process *cmd) |
418 | { | |
419 | int code = start_command(cmd); | |
420 | if (code) | |
421 | return code; | |
422 | return finish_command(cmd); | |
423 | } | |
424 | ||
1568fea0 | 425 | static void prepare_run_command_v_opt(struct child_process *cmd, |
ee493148 AR |
426 | const char **argv, |
427 | int opt) | |
1568fea0 AR |
428 | { |
429 | memset(cmd, 0, sizeof(*cmd)); | |
430 | cmd->argv = argv; | |
431 | cmd->no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0; | |
432 | cmd->git_cmd = opt & RUN_GIT_CMD ? 1 : 0; | |
433 | cmd->stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0; | |
c024beb5 | 434 | cmd->silent_exec_failure = opt & RUN_SILENT_EXEC_FAILURE ? 1 : 0; |
8dba1e63 | 435 | cmd->use_shell = opt & RUN_USING_SHELL ? 1 : 0; |
1568fea0 AR |
436 | } |
437 | ||
f1000898 SP |
438 | int run_command_v_opt(const char **argv, int opt) |
439 | { | |
440 | struct child_process cmd; | |
1568fea0 AR |
441 | prepare_run_command_v_opt(&cmd, argv, opt); |
442 | return run_command(&cmd); | |
443 | } | |
444 | ||
ee493148 AR |
445 | int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env) |
446 | { | |
447 | struct child_process cmd; | |
448 | prepare_run_command_v_opt(&cmd, argv, opt); | |
449 | cmd.dir = dir; | |
450 | cmd.env = env; | |
451 | return run_command(&cmd); | |
452 | } | |
2d22c208 | 453 | |
f6b60983 | 454 | #ifndef NO_PTHREADS |
0ea1c89b JS |
455 | static pthread_t main_thread; |
456 | static int main_thread_set; | |
457 | static pthread_key_t async_key; | |
458 | ||
200a76b7 | 459 | static void *run_thread(void *data) |
618ebe9f JS |
460 | { |
461 | struct async *async = data; | |
f6b60983 | 462 | intptr_t ret; |
0ea1c89b JS |
463 | |
464 | pthread_setspecific(async_key, async); | |
f6b60983 | 465 | ret = async->proc(async->proc_in, async->proc_out, async->data); |
200a76b7 | 466 | return (void *)ret; |
618ebe9f | 467 | } |
0ea1c89b JS |
468 | |
469 | static NORETURN void die_async(const char *err, va_list params) | |
470 | { | |
471 | vreportf("fatal: ", err, params); | |
472 | ||
473 | if (!pthread_equal(main_thread, pthread_self())) { | |
474 | struct async *async = pthread_getspecific(async_key); | |
475 | if (async->proc_in >= 0) | |
476 | close(async->proc_in); | |
477 | if (async->proc_out >= 0) | |
478 | close(async->proc_out); | |
479 | pthread_exit((void *)128); | |
480 | } | |
481 | ||
482 | exit(128); | |
618ebe9f JS |
483 | } |
484 | #endif | |
485 | ||
2d22c208 JS |
486 | int start_async(struct async *async) |
487 | { | |
ae6a5609 EFL |
488 | int need_in, need_out; |
489 | int fdin[2], fdout[2]; | |
490 | int proc_in, proc_out; | |
2d22c208 | 491 | |
ae6a5609 EFL |
492 | need_in = async->in < 0; |
493 | if (need_in) { | |
494 | if (pipe(fdin) < 0) { | |
495 | if (async->out > 0) | |
496 | close(async->out); | |
497 | return error("cannot create pipe: %s", strerror(errno)); | |
498 | } | |
499 | async->in = fdin[1]; | |
500 | } | |
501 | ||
502 | need_out = async->out < 0; | |
503 | if (need_out) { | |
504 | if (pipe(fdout) < 0) { | |
505 | if (need_in) | |
506 | close_pair(fdin); | |
507 | else if (async->in) | |
508 | close(async->in); | |
509 | return error("cannot create pipe: %s", strerror(errno)); | |
510 | } | |
511 | async->out = fdout[0]; | |
512 | } | |
513 | ||
514 | if (need_in) | |
515 | proc_in = fdin[0]; | |
516 | else if (async->in) | |
517 | proc_in = async->in; | |
518 | else | |
519 | proc_in = -1; | |
520 | ||
521 | if (need_out) | |
522 | proc_out = fdout[1]; | |
523 | else if (async->out) | |
524 | proc_out = async->out; | |
525 | else | |
526 | proc_out = -1; | |
2d22c208 | 527 | |
f6b60983 | 528 | #ifdef NO_PTHREADS |
2c3766f0 AM |
529 | /* Flush stdio before fork() to avoid cloning buffers */ |
530 | fflush(NULL); | |
531 | ||
2d22c208 JS |
532 | async->pid = fork(); |
533 | if (async->pid < 0) { | |
534 | error("fork (async) failed: %s", strerror(errno)); | |
ae6a5609 | 535 | goto error; |
2d22c208 JS |
536 | } |
537 | if (!async->pid) { | |
ae6a5609 EFL |
538 | if (need_in) |
539 | close(fdin[1]); | |
540 | if (need_out) | |
541 | close(fdout[0]); | |
542 | exit(!!async->proc(proc_in, proc_out, async->data)); | |
2d22c208 | 543 | } |
ae6a5609 EFL |
544 | |
545 | if (need_in) | |
546 | close(fdin[0]); | |
547 | else if (async->in) | |
548 | close(async->in); | |
549 | ||
550 | if (need_out) | |
551 | close(fdout[1]); | |
552 | else if (async->out) | |
553 | close(async->out); | |
618ebe9f | 554 | #else |
0ea1c89b JS |
555 | if (!main_thread_set) { |
556 | /* | |
557 | * We assume that the first time that start_async is called | |
558 | * it is from the main thread. | |
559 | */ | |
560 | main_thread_set = 1; | |
561 | main_thread = pthread_self(); | |
562 | pthread_key_create(&async_key, NULL); | |
563 | set_die_routine(die_async); | |
564 | } | |
565 | ||
200a76b7 JS |
566 | if (proc_in >= 0) |
567 | set_cloexec(proc_in); | |
568 | if (proc_out >= 0) | |
569 | set_cloexec(proc_out); | |
ae6a5609 EFL |
570 | async->proc_in = proc_in; |
571 | async->proc_out = proc_out; | |
200a76b7 JS |
572 | { |
573 | int err = pthread_create(&async->tid, NULL, run_thread, async); | |
574 | if (err) { | |
575 | error("cannot create thread: %s", strerror(err)); | |
576 | goto error; | |
577 | } | |
618ebe9f JS |
578 | } |
579 | #endif | |
2d22c208 | 580 | return 0; |
ae6a5609 EFL |
581 | |
582 | error: | |
583 | if (need_in) | |
584 | close_pair(fdin); | |
585 | else if (async->in) | |
586 | close(async->in); | |
587 | ||
588 | if (need_out) | |
589 | close_pair(fdout); | |
590 | else if (async->out) | |
591 | close(async->out); | |
592 | return -1; | |
2d22c208 JS |
593 | } |
594 | ||
595 | int finish_async(struct async *async) | |
596 | { | |
f6b60983 | 597 | #ifdef NO_PTHREADS |
200a76b7 | 598 | return wait_or_whine(async->pid, "child process", 0); |
618ebe9f | 599 | #else |
200a76b7 JS |
600 | void *ret = (void *)(intptr_t)(-1); |
601 | ||
602 | if (pthread_join(async->tid, &ret)) | |
603 | error("pthread_join failed"); | |
604 | return (int)(intptr_t)ret; | |
618ebe9f | 605 | #endif |
2d22c208 | 606 | } |
ae98a008 SB |
607 | |
608 | int run_hook(const char *index_file, const char *name, ...) | |
609 | { | |
610 | struct child_process hook; | |
14e6298f | 611 | const char **argv = NULL, *env[2]; |
ae98a008 SB |
612 | char index[PATH_MAX]; |
613 | va_list args; | |
614 | int ret; | |
14e6298f | 615 | size_t i = 0, alloc = 0; |
ae98a008 | 616 | |
cf94ca8e SB |
617 | if (access(git_path("hooks/%s", name), X_OK) < 0) |
618 | return 0; | |
619 | ||
ae98a008 | 620 | va_start(args, name); |
14e6298f SB |
621 | ALLOC_GROW(argv, i + 1, alloc); |
622 | argv[i++] = git_path("hooks/%s", name); | |
623 | while (argv[i-1]) { | |
624 | ALLOC_GROW(argv, i + 1, alloc); | |
625 | argv[i++] = va_arg(args, const char *); | |
626 | } | |
ae98a008 SB |
627 | va_end(args); |
628 | ||
ae98a008 SB |
629 | memset(&hook, 0, sizeof(hook)); |
630 | hook.argv = argv; | |
631 | hook.no_stdin = 1; | |
632 | hook.stdout_to_stderr = 1; | |
633 | if (index_file) { | |
634 | snprintf(index, sizeof(index), "GIT_INDEX_FILE=%s", index_file); | |
635 | env[0] = index; | |
636 | env[1] = NULL; | |
637 | hook.env = env; | |
638 | } | |
639 | ||
0ac77ec3 | 640 | ret = run_command(&hook); |
14e6298f | 641 | free(argv); |
ae98a008 SB |
642 | return ret; |
643 | } |