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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 | { | |
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 |
69 | static inline void close_pair(int fd[2]) |
70 | { | |
71 | close(fd[0]); | |
72 | close(fd[1]); | |
73 | } | |
74 | ||
75301f90 | 75 | #ifndef WIN32 |
e4507ae8 SP |
76 | static 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 |
84 | static 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 | ||
116 | static int exists_in_PATH(const char *file) | |
117 | { | |
118 | char *r = locate_in_PATH(file); | |
119 | free(r); | |
120 | return r != NULL; | |
121 | } | |
122 | ||
123 | int 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 |
148 | static 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 | |
186 | static 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 |
197 | static int child_err = 2; | |
2b541bf8 JS |
198 | static int child_notifier = -1; |
199 | ||
200 | static 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 | |
210 | static 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 | |
216 | static void error_child(const char *err, va_list params) | |
217 | { | |
218 | vwritef(child_err, "error: ", err, params); | |
219 | } | |
200a76b7 | 220 | #endif |
a5487ddf JS |
221 | |
222 | static 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 | |
13274526 | 229 | static int wait_or_whine(pid_t pid, const char *argv0) |
ab0b41da JS |
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 | 271 | int 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 |
320 | fail_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 | } |
f1000898 SP |
400 | if (cmd->git_cmd) { |
401 | execv_git_cmd(cmd->argv); | |
8dba1e63 JK |
402 | } else if (cmd->use_shell) { |
403 | execv_shell_cmd(cmd->argv); | |
77cb17e9 | 404 | } else { |
38f865c2 | 405 | sane_execvp(cmd->argv[0], (char *const*) cmd->argv); |
128aed68 | 406 | } |
fc1b56f0 CB |
407 | if (errno == ENOENT) { |
408 | if (!cmd->silent_exec_failure) | |
409 | error("cannot run %s: %s", cmd->argv[0], | |
410 | strerror(ENOENT)); | |
a5487ddf | 411 | exit(127); |
fc1b56f0 | 412 | } else { |
a5487ddf | 413 | die_errno("cannot exec '%s'", cmd->argv[0]); |
fc1b56f0 | 414 | } |
b1bf95bb | 415 | } |
0ac77ec3 JS |
416 | if (cmd->pid < 0) |
417 | error("cannot fork() for %s: %s", cmd->argv[0], | |
418 | strerror(failed_errno = errno)); | |
afe19ff7 JK |
419 | else if (cmd->clean_on_exit) |
420 | mark_child_for_cleanup(cmd->pid); | |
2b541bf8 JS |
421 | |
422 | /* | |
423 | * Wait for child's execvp. If the execvp succeeds (or if fork() | |
424 | * failed), EOF is seen immediately by the parent. Otherwise, the | |
425 | * child process sends a single byte. | |
426 | * Note that use of this infrastructure is completely advisory, | |
427 | * therefore, we keep error checks minimal. | |
428 | */ | |
429 | close(notify_pipe[1]); | |
430 | if (read(notify_pipe[0], ¬ify_pipe[1], 1) == 1) { | |
431 | /* | |
432 | * At this point we know that fork() succeeded, but execvp() | |
433 | * failed. Errors have been reported to our stderr. | |
434 | */ | |
13274526 | 435 | wait_or_whine(cmd->pid, cmd->argv[0]); |
2b541bf8 JS |
436 | failed_errno = errno; |
437 | cmd->pid = -1; | |
438 | } | |
439 | close(notify_pipe[0]); | |
afe19ff7 | 440 | |
2b541bf8 | 441 | } |
ba26f296 | 442 | #else |
0d30ad71 | 443 | { |
75301f90 | 444 | int fhin = 0, fhout = 1, fherr = 2; |
108ac313 | 445 | const char **sargv = cmd->argv; |
ba26f296 | 446 | char **env = environ; |
ba26f296 | 447 | |
75301f90 JS |
448 | if (cmd->no_stdin) |
449 | fhin = open("/dev/null", O_RDWR); | |
450 | else if (need_in) | |
451 | fhin = dup(fdin[0]); | |
452 | else if (cmd->in) | |
453 | fhin = dup(cmd->in); | |
454 | ||
455 | if (cmd->no_stderr) | |
456 | fherr = open("/dev/null", O_RDWR); | |
457 | else if (need_err) | |
458 | fherr = dup(fderr[1]); | |
76d44c8c JH |
459 | else if (cmd->err > 2) |
460 | fherr = dup(cmd->err); | |
75301f90 JS |
461 | |
462 | if (cmd->no_stdout) | |
463 | fhout = open("/dev/null", O_RDWR); | |
464 | else if (cmd->stdout_to_stderr) | |
465 | fhout = dup(fherr); | |
466 | else if (need_out) | |
467 | fhout = dup(fdout[1]); | |
468 | else if (cmd->out > 1) | |
469 | fhout = dup(cmd->out); | |
ba26f296 | 470 | |
2affea41 JS |
471 | if (cmd->env) |
472 | env = make_augmented_environ(cmd->env); | |
ba26f296 JS |
473 | |
474 | if (cmd->git_cmd) { | |
108ac313 | 475 | cmd->argv = prepare_git_cmd(cmd->argv); |
8dba1e63 JK |
476 | } else if (cmd->use_shell) { |
477 | cmd->argv = prepare_shell_cmd(cmd->argv); | |
ba26f296 JS |
478 | } |
479 | ||
f9a2743c | 480 | cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, env, cmd->dir, |
75301f90 | 481 | fhin, fhout, fherr); |
0ac77ec3 | 482 | failed_errno = errno; |
c024beb5 | 483 | if (cmd->pid < 0 && (!cmd->silent_exec_failure || errno != ENOENT)) |
0ac77ec3 | 484 | error("cannot spawn %s: %s", cmd->argv[0], strerror(errno)); |
afe19ff7 JK |
485 | if (cmd->clean_on_exit && cmd->pid >= 0) |
486 | mark_child_for_cleanup(cmd->pid); | |
ba26f296 JS |
487 | |
488 | if (cmd->env) | |
489 | free_environ(env); | |
490 | if (cmd->git_cmd) | |
108ac313 | 491 | free(cmd->argv); |
ba26f296 | 492 | |
108ac313 | 493 | cmd->argv = sargv; |
75301f90 JS |
494 | if (fhin != 0) |
495 | close(fhin); | |
496 | if (fhout != 1) | |
497 | close(fhout); | |
498 | if (fherr != 2) | |
499 | close(fherr); | |
0d30ad71 | 500 | } |
ba26f296 JS |
501 | #endif |
502 | ||
503 | if (cmd->pid < 0) { | |
504 | if (need_in) | |
505 | close_pair(fdin); | |
506 | else if (cmd->in) | |
507 | close(cmd->in); | |
508 | if (need_out) | |
509 | close_pair(fdout); | |
510 | else if (cmd->out) | |
511 | close(cmd->out); | |
512 | if (need_err) | |
513 | close_pair(fderr); | |
fc012c28 D |
514 | else if (cmd->err) |
515 | close(cmd->err); | |
0ac77ec3 JS |
516 | errno = failed_errno; |
517 | return -1; | |
ba26f296 | 518 | } |
4919bf03 SP |
519 | |
520 | if (need_in) | |
521 | close(fdin[0]); | |
522 | else if (cmd->in) | |
523 | close(cmd->in); | |
524 | ||
f4bba25b SP |
525 | if (need_out) |
526 | close(fdout[1]); | |
c20181e3 | 527 | else if (cmd->out) |
f4bba25b SP |
528 | close(cmd->out); |
529 | ||
f3b33f1d JS |
530 | if (need_err) |
531 | close(fderr[1]); | |
4f41b611 SP |
532 | else if (cmd->err) |
533 | close(cmd->err); | |
f3b33f1d | 534 | |
ebcb5d16 SP |
535 | return 0; |
536 | } | |
537 | ||
2d22c208 JS |
538 | int finish_command(struct child_process *cmd) |
539 | { | |
13274526 | 540 | return wait_or_whine(cmd->pid, cmd->argv[0]); |
2d22c208 JS |
541 | } |
542 | ||
ebcb5d16 SP |
543 | int run_command(struct child_process *cmd) |
544 | { | |
545 | int code = start_command(cmd); | |
546 | if (code) | |
547 | return code; | |
548 | return finish_command(cmd); | |
549 | } | |
550 | ||
1568fea0 | 551 | static void prepare_run_command_v_opt(struct child_process *cmd, |
ee493148 AR |
552 | const char **argv, |
553 | int opt) | |
1568fea0 AR |
554 | { |
555 | memset(cmd, 0, sizeof(*cmd)); | |
556 | cmd->argv = argv; | |
557 | cmd->no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0; | |
558 | cmd->git_cmd = opt & RUN_GIT_CMD ? 1 : 0; | |
559 | cmd->stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0; | |
c024beb5 | 560 | cmd->silent_exec_failure = opt & RUN_SILENT_EXEC_FAILURE ? 1 : 0; |
8dba1e63 | 561 | cmd->use_shell = opt & RUN_USING_SHELL ? 1 : 0; |
10c6cddd | 562 | cmd->clean_on_exit = opt & RUN_CLEAN_ON_EXIT ? 1 : 0; |
1568fea0 AR |
563 | } |
564 | ||
f1000898 SP |
565 | int run_command_v_opt(const char **argv, int opt) |
566 | { | |
567 | struct child_process cmd; | |
1568fea0 AR |
568 | prepare_run_command_v_opt(&cmd, argv, opt); |
569 | return run_command(&cmd); | |
570 | } | |
571 | ||
ee493148 AR |
572 | int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env) |
573 | { | |
574 | struct child_process cmd; | |
575 | prepare_run_command_v_opt(&cmd, argv, opt); | |
576 | cmd.dir = dir; | |
577 | cmd.env = env; | |
578 | return run_command(&cmd); | |
579 | } | |
2d22c208 | 580 | |
f6b60983 | 581 | #ifndef NO_PTHREADS |
0ea1c89b JS |
582 | static pthread_t main_thread; |
583 | static int main_thread_set; | |
584 | static pthread_key_t async_key; | |
585 | ||
200a76b7 | 586 | static void *run_thread(void *data) |
618ebe9f JS |
587 | { |
588 | struct async *async = data; | |
f6b60983 | 589 | intptr_t ret; |
0ea1c89b JS |
590 | |
591 | pthread_setspecific(async_key, async); | |
f6b60983 | 592 | ret = async->proc(async->proc_in, async->proc_out, async->data); |
200a76b7 | 593 | return (void *)ret; |
618ebe9f | 594 | } |
0ea1c89b JS |
595 | |
596 | static NORETURN void die_async(const char *err, va_list params) | |
597 | { | |
598 | vreportf("fatal: ", err, params); | |
599 | ||
600 | if (!pthread_equal(main_thread, pthread_self())) { | |
601 | struct async *async = pthread_getspecific(async_key); | |
602 | if (async->proc_in >= 0) | |
603 | close(async->proc_in); | |
604 | if (async->proc_out >= 0) | |
605 | close(async->proc_out); | |
606 | pthread_exit((void *)128); | |
607 | } | |
608 | ||
609 | exit(128); | |
618ebe9f JS |
610 | } |
611 | #endif | |
612 | ||
2d22c208 JS |
613 | int start_async(struct async *async) |
614 | { | |
ae6a5609 EFL |
615 | int need_in, need_out; |
616 | int fdin[2], fdout[2]; | |
617 | int proc_in, proc_out; | |
2d22c208 | 618 | |
ae6a5609 EFL |
619 | need_in = async->in < 0; |
620 | if (need_in) { | |
621 | if (pipe(fdin) < 0) { | |
622 | if (async->out > 0) | |
623 | close(async->out); | |
624 | return error("cannot create pipe: %s", strerror(errno)); | |
625 | } | |
626 | async->in = fdin[1]; | |
627 | } | |
628 | ||
629 | need_out = async->out < 0; | |
630 | if (need_out) { | |
631 | if (pipe(fdout) < 0) { | |
632 | if (need_in) | |
633 | close_pair(fdin); | |
634 | else if (async->in) | |
635 | close(async->in); | |
636 | return error("cannot create pipe: %s", strerror(errno)); | |
637 | } | |
638 | async->out = fdout[0]; | |
639 | } | |
640 | ||
641 | if (need_in) | |
642 | proc_in = fdin[0]; | |
643 | else if (async->in) | |
644 | proc_in = async->in; | |
645 | else | |
646 | proc_in = -1; | |
647 | ||
648 | if (need_out) | |
649 | proc_out = fdout[1]; | |
650 | else if (async->out) | |
651 | proc_out = async->out; | |
652 | else | |
653 | proc_out = -1; | |
2d22c208 | 654 | |
f6b60983 | 655 | #ifdef NO_PTHREADS |
2c3766f0 AM |
656 | /* Flush stdio before fork() to avoid cloning buffers */ |
657 | fflush(NULL); | |
658 | ||
2d22c208 JS |
659 | async->pid = fork(); |
660 | if (async->pid < 0) { | |
661 | error("fork (async) failed: %s", strerror(errno)); | |
ae6a5609 | 662 | goto error; |
2d22c208 JS |
663 | } |
664 | if (!async->pid) { | |
ae6a5609 EFL |
665 | if (need_in) |
666 | close(fdin[1]); | |
667 | if (need_out) | |
668 | close(fdout[0]); | |
669 | exit(!!async->proc(proc_in, proc_out, async->data)); | |
2d22c208 | 670 | } |
ae6a5609 | 671 | |
afe19ff7 JK |
672 | mark_child_for_cleanup(async->pid); |
673 | ||
ae6a5609 EFL |
674 | if (need_in) |
675 | close(fdin[0]); | |
676 | else if (async->in) | |
677 | close(async->in); | |
678 | ||
679 | if (need_out) | |
680 | close(fdout[1]); | |
681 | else if (async->out) | |
682 | close(async->out); | |
618ebe9f | 683 | #else |
0ea1c89b JS |
684 | if (!main_thread_set) { |
685 | /* | |
686 | * We assume that the first time that start_async is called | |
687 | * it is from the main thread. | |
688 | */ | |
689 | main_thread_set = 1; | |
690 | main_thread = pthread_self(); | |
691 | pthread_key_create(&async_key, NULL); | |
692 | set_die_routine(die_async); | |
693 | } | |
694 | ||
200a76b7 JS |
695 | if (proc_in >= 0) |
696 | set_cloexec(proc_in); | |
697 | if (proc_out >= 0) | |
698 | set_cloexec(proc_out); | |
ae6a5609 EFL |
699 | async->proc_in = proc_in; |
700 | async->proc_out = proc_out; | |
200a76b7 JS |
701 | { |
702 | int err = pthread_create(&async->tid, NULL, run_thread, async); | |
703 | if (err) { | |
704 | error("cannot create thread: %s", strerror(err)); | |
705 | goto error; | |
706 | } | |
618ebe9f JS |
707 | } |
708 | #endif | |
2d22c208 | 709 | return 0; |
ae6a5609 EFL |
710 | |
711 | error: | |
712 | if (need_in) | |
713 | close_pair(fdin); | |
714 | else if (async->in) | |
715 | close(async->in); | |
716 | ||
717 | if (need_out) | |
718 | close_pair(fdout); | |
719 | else if (async->out) | |
720 | close(async->out); | |
721 | return -1; | |
2d22c208 JS |
722 | } |
723 | ||
724 | int finish_async(struct async *async) | |
725 | { | |
f6b60983 | 726 | #ifdef NO_PTHREADS |
200a76b7 | 727 | return wait_or_whine(async->pid, "child process", 0); |
618ebe9f | 728 | #else |
200a76b7 JS |
729 | void *ret = (void *)(intptr_t)(-1); |
730 | ||
731 | if (pthread_join(async->tid, &ret)) | |
732 | error("pthread_join failed"); | |
733 | return (int)(intptr_t)ret; | |
618ebe9f | 734 | #endif |
2d22c208 | 735 | } |
ae98a008 SB |
736 | |
737 | int run_hook(const char *index_file, const char *name, ...) | |
738 | { | |
739 | struct child_process hook; | |
5d40a179 JK |
740 | struct argv_array argv = ARGV_ARRAY_INIT; |
741 | const char *p, *env[2]; | |
ae98a008 SB |
742 | char index[PATH_MAX]; |
743 | va_list args; | |
744 | int ret; | |
ae98a008 | 745 | |
cf94ca8e SB |
746 | if (access(git_path("hooks/%s", name), X_OK) < 0) |
747 | return 0; | |
748 | ||
ae98a008 | 749 | va_start(args, name); |
5d40a179 JK |
750 | argv_array_push(&argv, git_path("hooks/%s", name)); |
751 | while ((p = va_arg(args, const char *))) | |
752 | argv_array_push(&argv, p); | |
ae98a008 SB |
753 | va_end(args); |
754 | ||
ae98a008 | 755 | memset(&hook, 0, sizeof(hook)); |
5d40a179 | 756 | hook.argv = argv.argv; |
ae98a008 SB |
757 | hook.no_stdin = 1; |
758 | hook.stdout_to_stderr = 1; | |
759 | if (index_file) { | |
760 | snprintf(index, sizeof(index), "GIT_INDEX_FILE=%s", index_file); | |
761 | env[0] = index; | |
762 | env[1] = NULL; | |
763 | hook.env = env; | |
764 | } | |
765 | ||
0ac77ec3 | 766 | ret = run_command(&hook); |
5d40a179 | 767 | argv_array_clear(&argv); |
ae98a008 SB |
768 | return ret; |
769 | } |