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