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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); | |
a2767c5c JK |
245 | if (code != SIGINT && code != SIGQUIT) |
246 | error("%s died of signal %d", argv0, code); | |
ab0b41da JS |
247 | /* |
248 | * This return value is chosen so that code & 0xff | |
249 | * mimics the exit code that a POSIX shell would report for | |
250 | * a program that died from this signal. | |
251 | */ | |
709ca730 | 252 | code += 128; |
ab0b41da JS |
253 | } else if (WIFEXITED(status)) { |
254 | code = WEXITSTATUS(status); | |
255 | /* | |
256 | * Convert special exit code when execvp failed. | |
257 | */ | |
258 | if (code == 127) { | |
259 | code = -1; | |
260 | failed_errno = ENOENT; | |
ab0b41da JS |
261 | } |
262 | } else { | |
263 | error("waitpid is confused (%s)", argv0); | |
264 | } | |
afe19ff7 JK |
265 | |
266 | clear_child_for_cleanup(pid); | |
267 | ||
ab0b41da JS |
268 | errno = failed_errno; |
269 | return code; | |
270 | } | |
271 | ||
ebcb5d16 | 272 | int start_command(struct child_process *cmd) |
b1bf95bb | 273 | { |
f3b33f1d JS |
274 | int need_in, need_out, need_err; |
275 | int fdin[2], fdout[2], fderr[2]; | |
25043d8a | 276 | int failed_errno; |
939296c4 | 277 | char *str; |
4919bf03 | 278 | |
c20181e3 JS |
279 | /* |
280 | * In case of errors we must keep the promise to close FDs | |
281 | * that have been passed in via ->in and ->out. | |
282 | */ | |
283 | ||
e4507ae8 | 284 | need_in = !cmd->no_stdin && cmd->in < 0; |
4919bf03 | 285 | if (need_in) { |
c20181e3 | 286 | if (pipe(fdin) < 0) { |
0ac77ec3 | 287 | failed_errno = errno; |
c20181e3 JS |
288 | if (cmd->out > 0) |
289 | close(cmd->out); | |
939296c4 | 290 | str = "standard input"; |
0ac77ec3 | 291 | goto fail_pipe; |
c20181e3 | 292 | } |
4919bf03 | 293 | cmd->in = fdin[1]; |
4919bf03 SP |
294 | } |
295 | ||
e4507ae8 SP |
296 | need_out = !cmd->no_stdout |
297 | && !cmd->stdout_to_stderr | |
298 | && cmd->out < 0; | |
f4bba25b SP |
299 | if (need_out) { |
300 | if (pipe(fdout) < 0) { | |
0ac77ec3 | 301 | failed_errno = errno; |
f4bba25b SP |
302 | if (need_in) |
303 | close_pair(fdin); | |
c20181e3 JS |
304 | else if (cmd->in) |
305 | close(cmd->in); | |
939296c4 | 306 | str = "standard output"; |
0ac77ec3 | 307 | goto fail_pipe; |
f4bba25b SP |
308 | } |
309 | cmd->out = fdout[0]; | |
f4bba25b SP |
310 | } |
311 | ||
b73a4397 | 312 | need_err = !cmd->no_stderr && cmd->err < 0; |
f3b33f1d JS |
313 | if (need_err) { |
314 | if (pipe(fderr) < 0) { | |
0ac77ec3 | 315 | failed_errno = errno; |
f3b33f1d JS |
316 | if (need_in) |
317 | close_pair(fdin); | |
c20181e3 JS |
318 | else if (cmd->in) |
319 | close(cmd->in); | |
f3b33f1d JS |
320 | if (need_out) |
321 | close_pair(fdout); | |
c20181e3 JS |
322 | else if (cmd->out) |
323 | close(cmd->out); | |
939296c4 | 324 | str = "standard error"; |
0ac77ec3 | 325 | fail_pipe: |
939296c4 SB |
326 | error("cannot create %s pipe for %s: %s", |
327 | str, cmd->argv[0], strerror(failed_errno)); | |
0ac77ec3 JS |
328 | errno = failed_errno; |
329 | return -1; | |
f3b33f1d JS |
330 | } |
331 | cmd->err = fderr[0]; | |
332 | } | |
333 | ||
8852f5d7 | 334 | trace_argv_printf(cmd->argv, "trace: run_command:"); |
13af8cbd | 335 | fflush(NULL); |
8852f5d7 | 336 | |
71064e3f | 337 | #ifndef WIN32 |
2b541bf8 JS |
338 | { |
339 | int notify_pipe[2]; | |
340 | if (pipe(notify_pipe)) | |
341 | notify_pipe[0] = notify_pipe[1] = -1; | |
342 | ||
ebcb5d16 | 343 | cmd->pid = fork(); |
25043d8a | 344 | failed_errno = errno; |
ebcb5d16 | 345 | if (!cmd->pid) { |
a5487ddf JS |
346 | /* |
347 | * Redirect the channel to write syscall error messages to | |
348 | * before redirecting the process's stderr so that all die() | |
349 | * in subsequent call paths use the parent's stderr. | |
350 | */ | |
351 | if (cmd->no_stderr || need_err) { | |
352 | child_err = dup(2); | |
353 | set_cloexec(child_err); | |
354 | } | |
355 | set_die_routine(die_child); | |
3bc4181f | 356 | set_error_routine(error_child); |
a5487ddf | 357 | |
2b541bf8 JS |
358 | close(notify_pipe[0]); |
359 | set_cloexec(notify_pipe[1]); | |
360 | child_notifier = notify_pipe[1]; | |
361 | atexit(notify_parent); | |
362 | ||
e4507ae8 SP |
363 | if (cmd->no_stdin) |
364 | dup_devnull(0); | |
365 | else if (need_in) { | |
4919bf03 | 366 | dup2(fdin[0], 0); |
9dc09c76 | 367 | close_pair(fdin); |
4919bf03 SP |
368 | } else if (cmd->in) { |
369 | dup2(cmd->in, 0); | |
370 | close(cmd->in); | |
95d3c4f5 | 371 | } |
4919bf03 | 372 | |
ce2cf27a CC |
373 | if (cmd->no_stderr) |
374 | dup_devnull(2); | |
375 | else if (need_err) { | |
376 | dup2(fderr[1], 2); | |
377 | close_pair(fderr); | |
4f41b611 SP |
378 | } else if (cmd->err > 1) { |
379 | dup2(cmd->err, 2); | |
380 | close(cmd->err); | |
ce2cf27a CC |
381 | } |
382 | ||
e4507ae8 SP |
383 | if (cmd->no_stdout) |
384 | dup_devnull(1); | |
385 | else if (cmd->stdout_to_stderr) | |
cd83c74c | 386 | dup2(2, 1); |
f4bba25b SP |
387 | else if (need_out) { |
388 | dup2(fdout[1], 1); | |
389 | close_pair(fdout); | |
390 | } else if (cmd->out > 1) { | |
391 | dup2(cmd->out, 1); | |
392 | close(cmd->out); | |
393 | } | |
394 | ||
1568fea0 | 395 | if (cmd->dir && chdir(cmd->dir)) |
d824cbba TR |
396 | die_errno("exec '%s': cd to '%s' failed", cmd->argv[0], |
397 | cmd->dir); | |
ee493148 | 398 | if (cmd->env) { |
3427b375 AR |
399 | for (; *cmd->env; cmd->env++) { |
400 | if (strchr(*cmd->env, '=')) | |
4b25d091 | 401 | putenv((char *)*cmd->env); |
3427b375 AR |
402 | else |
403 | unsetenv(*cmd->env); | |
404 | } | |
ee493148 | 405 | } |
f1000898 SP |
406 | if (cmd->git_cmd) { |
407 | execv_git_cmd(cmd->argv); | |
8dba1e63 JK |
408 | } else if (cmd->use_shell) { |
409 | execv_shell_cmd(cmd->argv); | |
77cb17e9 | 410 | } else { |
38f865c2 | 411 | sane_execvp(cmd->argv[0], (char *const*) cmd->argv); |
128aed68 | 412 | } |
fc1b56f0 CB |
413 | if (errno == ENOENT) { |
414 | if (!cmd->silent_exec_failure) | |
415 | error("cannot run %s: %s", cmd->argv[0], | |
416 | strerror(ENOENT)); | |
a5487ddf | 417 | exit(127); |
fc1b56f0 | 418 | } else { |
a5487ddf | 419 | die_errno("cannot exec '%s'", cmd->argv[0]); |
fc1b56f0 | 420 | } |
b1bf95bb | 421 | } |
0ac77ec3 JS |
422 | if (cmd->pid < 0) |
423 | error("cannot fork() for %s: %s", cmd->argv[0], | |
25043d8a | 424 | strerror(errno)); |
afe19ff7 JK |
425 | else if (cmd->clean_on_exit) |
426 | mark_child_for_cleanup(cmd->pid); | |
2b541bf8 JS |
427 | |
428 | /* | |
429 | * Wait for child's execvp. If the execvp succeeds (or if fork() | |
430 | * failed), EOF is seen immediately by the parent. Otherwise, the | |
431 | * child process sends a single byte. | |
432 | * Note that use of this infrastructure is completely advisory, | |
433 | * therefore, we keep error checks minimal. | |
434 | */ | |
435 | close(notify_pipe[1]); | |
436 | if (read(notify_pipe[0], ¬ify_pipe[1], 1) == 1) { | |
437 | /* | |
438 | * At this point we know that fork() succeeded, but execvp() | |
439 | * failed. Errors have been reported to our stderr. | |
440 | */ | |
13274526 | 441 | wait_or_whine(cmd->pid, cmd->argv[0]); |
2b541bf8 JS |
442 | failed_errno = errno; |
443 | cmd->pid = -1; | |
444 | } | |
445 | close(notify_pipe[0]); | |
afe19ff7 | 446 | |
2b541bf8 | 447 | } |
ba26f296 | 448 | #else |
0d30ad71 | 449 | { |
75301f90 | 450 | int fhin = 0, fhout = 1, fherr = 2; |
108ac313 | 451 | const char **sargv = cmd->argv; |
ba26f296 | 452 | char **env = environ; |
ba26f296 | 453 | |
75301f90 JS |
454 | if (cmd->no_stdin) |
455 | fhin = open("/dev/null", O_RDWR); | |
456 | else if (need_in) | |
457 | fhin = dup(fdin[0]); | |
458 | else if (cmd->in) | |
459 | fhin = dup(cmd->in); | |
460 | ||
461 | if (cmd->no_stderr) | |
462 | fherr = open("/dev/null", O_RDWR); | |
463 | else if (need_err) | |
464 | fherr = dup(fderr[1]); | |
76d44c8c JH |
465 | else if (cmd->err > 2) |
466 | fherr = dup(cmd->err); | |
75301f90 JS |
467 | |
468 | if (cmd->no_stdout) | |
469 | fhout = open("/dev/null", O_RDWR); | |
470 | else if (cmd->stdout_to_stderr) | |
471 | fhout = dup(fherr); | |
472 | else if (need_out) | |
473 | fhout = dup(fdout[1]); | |
474 | else if (cmd->out > 1) | |
475 | fhout = dup(cmd->out); | |
ba26f296 | 476 | |
2affea41 JS |
477 | if (cmd->env) |
478 | env = make_augmented_environ(cmd->env); | |
ba26f296 JS |
479 | |
480 | if (cmd->git_cmd) { | |
108ac313 | 481 | cmd->argv = prepare_git_cmd(cmd->argv); |
8dba1e63 JK |
482 | } else if (cmd->use_shell) { |
483 | cmd->argv = prepare_shell_cmd(cmd->argv); | |
ba26f296 JS |
484 | } |
485 | ||
f9a2743c | 486 | cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, env, cmd->dir, |
75301f90 | 487 | fhin, fhout, fherr); |
0ac77ec3 | 488 | failed_errno = errno; |
c024beb5 | 489 | if (cmd->pid < 0 && (!cmd->silent_exec_failure || errno != ENOENT)) |
0ac77ec3 | 490 | error("cannot spawn %s: %s", cmd->argv[0], strerror(errno)); |
afe19ff7 JK |
491 | if (cmd->clean_on_exit && cmd->pid >= 0) |
492 | mark_child_for_cleanup(cmd->pid); | |
ba26f296 JS |
493 | |
494 | if (cmd->env) | |
495 | free_environ(env); | |
496 | if (cmd->git_cmd) | |
108ac313 | 497 | free(cmd->argv); |
ba26f296 | 498 | |
108ac313 | 499 | cmd->argv = sargv; |
75301f90 JS |
500 | if (fhin != 0) |
501 | close(fhin); | |
502 | if (fhout != 1) | |
503 | close(fhout); | |
504 | if (fherr != 2) | |
505 | close(fherr); | |
0d30ad71 | 506 | } |
ba26f296 JS |
507 | #endif |
508 | ||
509 | if (cmd->pid < 0) { | |
510 | if (need_in) | |
511 | close_pair(fdin); | |
512 | else if (cmd->in) | |
513 | close(cmd->in); | |
514 | if (need_out) | |
515 | close_pair(fdout); | |
516 | else if (cmd->out) | |
517 | close(cmd->out); | |
518 | if (need_err) | |
519 | close_pair(fderr); | |
fc012c28 D |
520 | else if (cmd->err) |
521 | close(cmd->err); | |
0ac77ec3 JS |
522 | errno = failed_errno; |
523 | return -1; | |
ba26f296 | 524 | } |
4919bf03 SP |
525 | |
526 | if (need_in) | |
527 | close(fdin[0]); | |
528 | else if (cmd->in) | |
529 | close(cmd->in); | |
530 | ||
f4bba25b SP |
531 | if (need_out) |
532 | close(fdout[1]); | |
c20181e3 | 533 | else if (cmd->out) |
f4bba25b SP |
534 | close(cmd->out); |
535 | ||
f3b33f1d JS |
536 | if (need_err) |
537 | close(fderr[1]); | |
4f41b611 SP |
538 | else if (cmd->err) |
539 | close(cmd->err); | |
f3b33f1d | 540 | |
ebcb5d16 SP |
541 | return 0; |
542 | } | |
543 | ||
2d22c208 JS |
544 | int finish_command(struct child_process *cmd) |
545 | { | |
13274526 | 546 | return wait_or_whine(cmd->pid, cmd->argv[0]); |
2d22c208 JS |
547 | } |
548 | ||
ebcb5d16 SP |
549 | int run_command(struct child_process *cmd) |
550 | { | |
551 | int code = start_command(cmd); | |
552 | if (code) | |
553 | return code; | |
554 | return finish_command(cmd); | |
555 | } | |
556 | ||
1568fea0 | 557 | static void prepare_run_command_v_opt(struct child_process *cmd, |
ee493148 AR |
558 | const char **argv, |
559 | int opt) | |
1568fea0 AR |
560 | { |
561 | memset(cmd, 0, sizeof(*cmd)); | |
562 | cmd->argv = argv; | |
563 | cmd->no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0; | |
564 | cmd->git_cmd = opt & RUN_GIT_CMD ? 1 : 0; | |
565 | cmd->stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0; | |
c024beb5 | 566 | cmd->silent_exec_failure = opt & RUN_SILENT_EXEC_FAILURE ? 1 : 0; |
8dba1e63 | 567 | cmd->use_shell = opt & RUN_USING_SHELL ? 1 : 0; |
10c6cddd | 568 | cmd->clean_on_exit = opt & RUN_CLEAN_ON_EXIT ? 1 : 0; |
1568fea0 AR |
569 | } |
570 | ||
f1000898 SP |
571 | int run_command_v_opt(const char **argv, int opt) |
572 | { | |
573 | struct child_process cmd; | |
1568fea0 AR |
574 | prepare_run_command_v_opt(&cmd, argv, opt); |
575 | return run_command(&cmd); | |
576 | } | |
577 | ||
ee493148 AR |
578 | int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env) |
579 | { | |
580 | struct child_process cmd; | |
581 | prepare_run_command_v_opt(&cmd, argv, opt); | |
582 | cmd.dir = dir; | |
583 | cmd.env = env; | |
584 | return run_command(&cmd); | |
585 | } | |
2d22c208 | 586 | |
f6b60983 | 587 | #ifndef NO_PTHREADS |
0ea1c89b JS |
588 | static pthread_t main_thread; |
589 | static int main_thread_set; | |
590 | static pthread_key_t async_key; | |
591 | ||
200a76b7 | 592 | static void *run_thread(void *data) |
618ebe9f JS |
593 | { |
594 | struct async *async = data; | |
f6b60983 | 595 | intptr_t ret; |
0ea1c89b JS |
596 | |
597 | pthread_setspecific(async_key, async); | |
f6b60983 | 598 | ret = async->proc(async->proc_in, async->proc_out, async->data); |
200a76b7 | 599 | return (void *)ret; |
618ebe9f | 600 | } |
0ea1c89b JS |
601 | |
602 | static NORETURN void die_async(const char *err, va_list params) | |
603 | { | |
604 | vreportf("fatal: ", err, params); | |
605 | ||
606 | if (!pthread_equal(main_thread, pthread_self())) { | |
607 | struct async *async = pthread_getspecific(async_key); | |
608 | if (async->proc_in >= 0) | |
609 | close(async->proc_in); | |
610 | if (async->proc_out >= 0) | |
611 | close(async->proc_out); | |
612 | pthread_exit((void *)128); | |
613 | } | |
614 | ||
615 | exit(128); | |
618ebe9f JS |
616 | } |
617 | #endif | |
618 | ||
2d22c208 JS |
619 | int start_async(struct async *async) |
620 | { | |
ae6a5609 EFL |
621 | int need_in, need_out; |
622 | int fdin[2], fdout[2]; | |
623 | int proc_in, proc_out; | |
2d22c208 | 624 | |
ae6a5609 EFL |
625 | need_in = async->in < 0; |
626 | if (need_in) { | |
627 | if (pipe(fdin) < 0) { | |
628 | if (async->out > 0) | |
629 | close(async->out); | |
630 | return error("cannot create pipe: %s", strerror(errno)); | |
631 | } | |
632 | async->in = fdin[1]; | |
633 | } | |
634 | ||
635 | need_out = async->out < 0; | |
636 | if (need_out) { | |
637 | if (pipe(fdout) < 0) { | |
638 | if (need_in) | |
639 | close_pair(fdin); | |
640 | else if (async->in) | |
641 | close(async->in); | |
642 | return error("cannot create pipe: %s", strerror(errno)); | |
643 | } | |
644 | async->out = fdout[0]; | |
645 | } | |
646 | ||
647 | if (need_in) | |
648 | proc_in = fdin[0]; | |
649 | else if (async->in) | |
650 | proc_in = async->in; | |
651 | else | |
652 | proc_in = -1; | |
653 | ||
654 | if (need_out) | |
655 | proc_out = fdout[1]; | |
656 | else if (async->out) | |
657 | proc_out = async->out; | |
658 | else | |
659 | proc_out = -1; | |
2d22c208 | 660 | |
f6b60983 | 661 | #ifdef NO_PTHREADS |
2c3766f0 AM |
662 | /* Flush stdio before fork() to avoid cloning buffers */ |
663 | fflush(NULL); | |
664 | ||
2d22c208 JS |
665 | async->pid = fork(); |
666 | if (async->pid < 0) { | |
667 | error("fork (async) failed: %s", strerror(errno)); | |
ae6a5609 | 668 | goto error; |
2d22c208 JS |
669 | } |
670 | if (!async->pid) { | |
ae6a5609 EFL |
671 | if (need_in) |
672 | close(fdin[1]); | |
673 | if (need_out) | |
674 | close(fdout[0]); | |
675 | exit(!!async->proc(proc_in, proc_out, async->data)); | |
2d22c208 | 676 | } |
ae6a5609 | 677 | |
afe19ff7 JK |
678 | mark_child_for_cleanup(async->pid); |
679 | ||
ae6a5609 EFL |
680 | if (need_in) |
681 | close(fdin[0]); | |
682 | else if (async->in) | |
683 | close(async->in); | |
684 | ||
685 | if (need_out) | |
686 | close(fdout[1]); | |
687 | else if (async->out) | |
688 | close(async->out); | |
618ebe9f | 689 | #else |
0ea1c89b JS |
690 | if (!main_thread_set) { |
691 | /* | |
692 | * We assume that the first time that start_async is called | |
693 | * it is from the main thread. | |
694 | */ | |
695 | main_thread_set = 1; | |
696 | main_thread = pthread_self(); | |
697 | pthread_key_create(&async_key, NULL); | |
698 | set_die_routine(die_async); | |
699 | } | |
700 | ||
200a76b7 JS |
701 | if (proc_in >= 0) |
702 | set_cloexec(proc_in); | |
703 | if (proc_out >= 0) | |
704 | set_cloexec(proc_out); | |
ae6a5609 EFL |
705 | async->proc_in = proc_in; |
706 | async->proc_out = proc_out; | |
200a76b7 JS |
707 | { |
708 | int err = pthread_create(&async->tid, NULL, run_thread, async); | |
709 | if (err) { | |
710 | error("cannot create thread: %s", strerror(err)); | |
711 | goto error; | |
712 | } | |
618ebe9f JS |
713 | } |
714 | #endif | |
2d22c208 | 715 | return 0; |
ae6a5609 EFL |
716 | |
717 | error: | |
718 | if (need_in) | |
719 | close_pair(fdin); | |
720 | else if (async->in) | |
721 | close(async->in); | |
722 | ||
723 | if (need_out) | |
724 | close_pair(fdout); | |
725 | else if (async->out) | |
726 | close(async->out); | |
727 | return -1; | |
2d22c208 JS |
728 | } |
729 | ||
730 | int finish_async(struct async *async) | |
731 | { | |
f6b60983 | 732 | #ifdef NO_PTHREADS |
0398fc34 | 733 | return wait_or_whine(async->pid, "child process"); |
618ebe9f | 734 | #else |
200a76b7 JS |
735 | void *ret = (void *)(intptr_t)(-1); |
736 | ||
737 | if (pthread_join(async->tid, &ret)) | |
738 | error("pthread_join failed"); | |
739 | return (int)(intptr_t)ret; | |
618ebe9f | 740 | #endif |
2d22c208 | 741 | } |
ae98a008 | 742 | |
5a7da2dc AS |
743 | char *find_hook(const char *name) |
744 | { | |
745 | char *path = git_path("hooks/%s", name); | |
746 | if (access(path, X_OK) < 0) | |
747 | path = NULL; | |
748 | ||
749 | return path; | |
750 | } | |
751 | ||
ae98a008 SB |
752 | int run_hook(const char *index_file, const char *name, ...) |
753 | { | |
754 | struct child_process hook; | |
5d40a179 JK |
755 | struct argv_array argv = ARGV_ARRAY_INIT; |
756 | const char *p, *env[2]; | |
ae98a008 SB |
757 | char index[PATH_MAX]; |
758 | va_list args; | |
759 | int ret; | |
ae98a008 | 760 | |
5a7da2dc AS |
761 | p = find_hook(name); |
762 | if (!p) | |
cf94ca8e SB |
763 | return 0; |
764 | ||
5a7da2dc AS |
765 | argv_array_push(&argv, p); |
766 | ||
ae98a008 | 767 | va_start(args, name); |
5d40a179 JK |
768 | while ((p = va_arg(args, const char *))) |
769 | argv_array_push(&argv, p); | |
ae98a008 SB |
770 | va_end(args); |
771 | ||
ae98a008 | 772 | memset(&hook, 0, sizeof(hook)); |
5d40a179 | 773 | hook.argv = argv.argv; |
ae98a008 SB |
774 | hook.no_stdin = 1; |
775 | hook.stdout_to_stderr = 1; | |
776 | if (index_file) { | |
777 | snprintf(index, sizeof(index), "GIT_INDEX_FILE=%s", index_file); | |
778 | env[0] = index; | |
779 | env[1] = NULL; | |
780 | hook.env = env; | |
781 | } | |
782 | ||
0ac77ec3 | 783 | ret = run_command(&hook); |
5d40a179 | 784 | argv_array_clear(&argv); |
ae98a008 SB |
785 | return ret; |
786 | } |