]>
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 | ||
e4507ae8 SP |
11 | static inline void dup_devnull(int to) |
12 | { | |
13 | int fd = open("/dev/null", O_RDWR); | |
14 | dup2(fd, to); | |
15 | close(fd); | |
16 | } | |
17 | ||
ebcb5d16 | 18 | int start_command(struct child_process *cmd) |
b1bf95bb | 19 | { |
f3b33f1d JS |
20 | int need_in, need_out, need_err; |
21 | int fdin[2], fdout[2], fderr[2]; | |
5a7a3671 | 22 | int failed_errno = failed_errno; |
4919bf03 | 23 | |
c20181e3 JS |
24 | /* |
25 | * In case of errors we must keep the promise to close FDs | |
26 | * that have been passed in via ->in and ->out. | |
27 | */ | |
28 | ||
e4507ae8 | 29 | need_in = !cmd->no_stdin && cmd->in < 0; |
4919bf03 | 30 | if (need_in) { |
c20181e3 | 31 | if (pipe(fdin) < 0) { |
0ac77ec3 | 32 | failed_errno = errno; |
c20181e3 JS |
33 | if (cmd->out > 0) |
34 | close(cmd->out); | |
0ac77ec3 | 35 | goto fail_pipe; |
c20181e3 | 36 | } |
4919bf03 | 37 | cmd->in = fdin[1]; |
4919bf03 SP |
38 | } |
39 | ||
e4507ae8 SP |
40 | need_out = !cmd->no_stdout |
41 | && !cmd->stdout_to_stderr | |
42 | && cmd->out < 0; | |
f4bba25b SP |
43 | if (need_out) { |
44 | if (pipe(fdout) < 0) { | |
0ac77ec3 | 45 | failed_errno = errno; |
f4bba25b SP |
46 | if (need_in) |
47 | close_pair(fdin); | |
c20181e3 JS |
48 | else if (cmd->in) |
49 | close(cmd->in); | |
0ac77ec3 | 50 | goto fail_pipe; |
f4bba25b SP |
51 | } |
52 | cmd->out = fdout[0]; | |
f4bba25b SP |
53 | } |
54 | ||
b73a4397 | 55 | need_err = !cmd->no_stderr && cmd->err < 0; |
f3b33f1d JS |
56 | if (need_err) { |
57 | if (pipe(fderr) < 0) { | |
0ac77ec3 | 58 | failed_errno = errno; |
f3b33f1d JS |
59 | if (need_in) |
60 | close_pair(fdin); | |
c20181e3 JS |
61 | else if (cmd->in) |
62 | close(cmd->in); | |
f3b33f1d JS |
63 | if (need_out) |
64 | close_pair(fdout); | |
c20181e3 JS |
65 | else if (cmd->out) |
66 | close(cmd->out); | |
0ac77ec3 JS |
67 | fail_pipe: |
68 | error("cannot create pipe for %s: %s", | |
69 | cmd->argv[0], strerror(failed_errno)); | |
70 | errno = failed_errno; | |
71 | return -1; | |
f3b33f1d JS |
72 | } |
73 | cmd->err = fderr[0]; | |
74 | } | |
75 | ||
8852f5d7 JS |
76 | trace_argv_printf(cmd->argv, "trace: run_command:"); |
77 | ||
71064e3f | 78 | #ifndef WIN32 |
7d0b18a4 | 79 | fflush(NULL); |
ebcb5d16 | 80 | cmd->pid = fork(); |
ebcb5d16 | 81 | if (!cmd->pid) { |
e4507ae8 SP |
82 | if (cmd->no_stdin) |
83 | dup_devnull(0); | |
84 | else if (need_in) { | |
4919bf03 | 85 | dup2(fdin[0], 0); |
9dc09c76 | 86 | close_pair(fdin); |
4919bf03 SP |
87 | } else if (cmd->in) { |
88 | dup2(cmd->in, 0); | |
89 | close(cmd->in); | |
95d3c4f5 | 90 | } |
4919bf03 | 91 | |
ce2cf27a CC |
92 | if (cmd->no_stderr) |
93 | dup_devnull(2); | |
94 | else if (need_err) { | |
95 | dup2(fderr[1], 2); | |
96 | close_pair(fderr); | |
4f41b611 SP |
97 | } else if (cmd->err > 1) { |
98 | dup2(cmd->err, 2); | |
99 | close(cmd->err); | |
ce2cf27a CC |
100 | } |
101 | ||
e4507ae8 SP |
102 | if (cmd->no_stdout) |
103 | dup_devnull(1); | |
104 | else if (cmd->stdout_to_stderr) | |
cd83c74c | 105 | dup2(2, 1); |
f4bba25b SP |
106 | else if (need_out) { |
107 | dup2(fdout[1], 1); | |
108 | close_pair(fdout); | |
109 | } else if (cmd->out > 1) { | |
110 | dup2(cmd->out, 1); | |
111 | close(cmd->out); | |
112 | } | |
113 | ||
1568fea0 | 114 | if (cmd->dir && chdir(cmd->dir)) |
d824cbba TR |
115 | die_errno("exec '%s': cd to '%s' failed", cmd->argv[0], |
116 | cmd->dir); | |
ee493148 | 117 | if (cmd->env) { |
3427b375 AR |
118 | for (; *cmd->env; cmd->env++) { |
119 | if (strchr(*cmd->env, '=')) | |
4b25d091 | 120 | putenv((char *)*cmd->env); |
3427b375 AR |
121 | else |
122 | unsetenv(*cmd->env); | |
123 | } | |
ee493148 | 124 | } |
ccf08bc3 JK |
125 | if (cmd->preexec_cb) |
126 | cmd->preexec_cb(); | |
f1000898 SP |
127 | if (cmd->git_cmd) { |
128 | execv_git_cmd(cmd->argv); | |
77cb17e9 | 129 | } else { |
f1000898 | 130 | execvp(cmd->argv[0], (char *const*) cmd->argv); |
128aed68 | 131 | } |
45c0961c JK |
132 | trace_printf("trace: exec '%s' failed: %s\n", cmd->argv[0], |
133 | strerror(errno)); | |
134 | exit(127); | |
b1bf95bb | 135 | } |
0ac77ec3 JS |
136 | if (cmd->pid < 0) |
137 | error("cannot fork() for %s: %s", cmd->argv[0], | |
138 | strerror(failed_errno = errno)); | |
ba26f296 | 139 | #else |
0d30ad71 | 140 | { |
ba26f296 | 141 | int s0 = -1, s1 = -1, s2 = -1; /* backups of stdin, stdout, stderr */ |
108ac313 | 142 | const char **sargv = cmd->argv; |
ba26f296 | 143 | char **env = environ; |
ba26f296 JS |
144 | |
145 | if (cmd->no_stdin) { | |
146 | s0 = dup(0); | |
147 | dup_devnull(0); | |
148 | } else if (need_in) { | |
149 | s0 = dup(0); | |
150 | dup2(fdin[0], 0); | |
151 | } else if (cmd->in) { | |
152 | s0 = dup(0); | |
153 | dup2(cmd->in, 0); | |
154 | } | |
155 | ||
156 | if (cmd->no_stderr) { | |
157 | s2 = dup(2); | |
158 | dup_devnull(2); | |
159 | } else if (need_err) { | |
160 | s2 = dup(2); | |
161 | dup2(fderr[1], 2); | |
4f41b611 SP |
162 | } else if (cmd->err > 2) { |
163 | s2 = dup(2); | |
164 | dup2(cmd->err, 2); | |
ba26f296 JS |
165 | } |
166 | ||
167 | if (cmd->no_stdout) { | |
168 | s1 = dup(1); | |
169 | dup_devnull(1); | |
170 | } else if (cmd->stdout_to_stderr) { | |
171 | s1 = dup(1); | |
172 | dup2(2, 1); | |
173 | } else if (need_out) { | |
174 | s1 = dup(1); | |
175 | dup2(fdout[1], 1); | |
176 | } else if (cmd->out > 1) { | |
177 | s1 = dup(1); | |
178 | dup2(cmd->out, 1); | |
179 | } | |
180 | ||
181 | if (cmd->dir) | |
182 | die("chdir in start_command() not implemented"); | |
2affea41 JS |
183 | if (cmd->env) |
184 | env = make_augmented_environ(cmd->env); | |
ba26f296 JS |
185 | |
186 | if (cmd->git_cmd) { | |
108ac313 | 187 | cmd->argv = prepare_git_cmd(cmd->argv); |
ba26f296 JS |
188 | } |
189 | ||
7e5d7768 | 190 | cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, env); |
0ac77ec3 | 191 | failed_errno = errno; |
c024beb5 | 192 | if (cmd->pid < 0 && (!cmd->silent_exec_failure || errno != ENOENT)) |
0ac77ec3 | 193 | error("cannot spawn %s: %s", cmd->argv[0], strerror(errno)); |
ba26f296 JS |
194 | |
195 | if (cmd->env) | |
196 | free_environ(env); | |
197 | if (cmd->git_cmd) | |
108ac313 | 198 | free(cmd->argv); |
ba26f296 | 199 | |
108ac313 | 200 | cmd->argv = sargv; |
ba26f296 JS |
201 | if (s0 >= 0) |
202 | dup2(s0, 0), close(s0); | |
203 | if (s1 >= 0) | |
204 | dup2(s1, 1), close(s1); | |
205 | if (s2 >= 0) | |
206 | dup2(s2, 2), close(s2); | |
0d30ad71 | 207 | } |
ba26f296 JS |
208 | #endif |
209 | ||
210 | if (cmd->pid < 0) { | |
211 | if (need_in) | |
212 | close_pair(fdin); | |
213 | else if (cmd->in) | |
214 | close(cmd->in); | |
215 | if (need_out) | |
216 | close_pair(fdout); | |
217 | else if (cmd->out) | |
218 | close(cmd->out); | |
219 | if (need_err) | |
220 | close_pair(fderr); | |
0ac77ec3 JS |
221 | errno = failed_errno; |
222 | return -1; | |
ba26f296 | 223 | } |
4919bf03 SP |
224 | |
225 | if (need_in) | |
226 | close(fdin[0]); | |
227 | else if (cmd->in) | |
228 | close(cmd->in); | |
229 | ||
f4bba25b SP |
230 | if (need_out) |
231 | close(fdout[1]); | |
c20181e3 | 232 | else if (cmd->out) |
f4bba25b SP |
233 | close(cmd->out); |
234 | ||
f3b33f1d JS |
235 | if (need_err) |
236 | close(fderr[1]); | |
4f41b611 SP |
237 | else if (cmd->err) |
238 | close(cmd->err); | |
f3b33f1d | 239 | |
ebcb5d16 SP |
240 | return 0; |
241 | } | |
242 | ||
c024beb5 | 243 | static int wait_or_whine(pid_t pid, const char *argv0, int silent_exec_failure) |
ebcb5d16 | 244 | { |
0ac77ec3 JS |
245 | int status, code = -1; |
246 | pid_t waiting; | |
247 | int failed_errno = 0; | |
248 | ||
249 | while ((waiting = waitpid(pid, &status, 0)) < 0 && errno == EINTR) | |
250 | ; /* nothing */ | |
251 | ||
252 | if (waiting < 0) { | |
253 | failed_errno = errno; | |
254 | error("waitpid for %s failed: %s", argv0, strerror(errno)); | |
255 | } else if (waiting != pid) { | |
256 | error("waitpid is confused (%s)", argv0); | |
257 | } else if (WIFSIGNALED(status)) { | |
b99d5f40 JS |
258 | code = WTERMSIG(status); |
259 | error("%s died of signal %d", argv0, code); | |
260 | /* | |
261 | * This return value is chosen so that code & 0xff | |
262 | * mimics the exit code that a POSIX shell would report for | |
263 | * a program that died from this signal. | |
264 | */ | |
265 | code -= 128; | |
0ac77ec3 | 266 | } else if (WIFEXITED(status)) { |
b1bf95bb | 267 | code = WEXITSTATUS(status); |
0ac77ec3 JS |
268 | /* |
269 | * Convert special exit code when execvp failed. | |
270 | */ | |
271 | if (code == 127) { | |
272 | code = -1; | |
273 | failed_errno = ENOENT; | |
c024beb5 JS |
274 | if (!silent_exec_failure) |
275 | error("cannot run %s: %s", argv0, | |
276 | strerror(ENOENT)); | |
45c0961c | 277 | } |
0ac77ec3 JS |
278 | } else { |
279 | error("waitpid is confused (%s)", argv0); | |
b1bf95bb | 280 | } |
0ac77ec3 JS |
281 | errno = failed_errno; |
282 | return code; | |
b1bf95bb | 283 | } |
f1000898 | 284 | |
2d22c208 JS |
285 | int finish_command(struct child_process *cmd) |
286 | { | |
c024beb5 | 287 | return wait_or_whine(cmd->pid, cmd->argv[0], cmd->silent_exec_failure); |
2d22c208 JS |
288 | } |
289 | ||
ebcb5d16 SP |
290 | int run_command(struct child_process *cmd) |
291 | { | |
292 | int code = start_command(cmd); | |
293 | if (code) | |
294 | return code; | |
295 | return finish_command(cmd); | |
296 | } | |
297 | ||
1568fea0 | 298 | static void prepare_run_command_v_opt(struct child_process *cmd, |
ee493148 AR |
299 | const char **argv, |
300 | int opt) | |
1568fea0 AR |
301 | { |
302 | memset(cmd, 0, sizeof(*cmd)); | |
303 | cmd->argv = argv; | |
304 | cmd->no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0; | |
305 | cmd->git_cmd = opt & RUN_GIT_CMD ? 1 : 0; | |
306 | cmd->stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0; | |
c024beb5 | 307 | cmd->silent_exec_failure = opt & RUN_SILENT_EXEC_FAILURE ? 1 : 0; |
1568fea0 AR |
308 | } |
309 | ||
f1000898 SP |
310 | int run_command_v_opt(const char **argv, int opt) |
311 | { | |
312 | struct child_process cmd; | |
1568fea0 AR |
313 | prepare_run_command_v_opt(&cmd, argv, opt); |
314 | return run_command(&cmd); | |
315 | } | |
316 | ||
ee493148 AR |
317 | int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env) |
318 | { | |
319 | struct child_process cmd; | |
320 | prepare_run_command_v_opt(&cmd, argv, opt); | |
321 | cmd.dir = dir; | |
322 | cmd.env = env; | |
323 | return run_command(&cmd); | |
324 | } | |
2d22c208 | 325 | |
71064e3f | 326 | #ifdef WIN32 |
d7fa500f | 327 | static unsigned __stdcall run_thread(void *data) |
618ebe9f JS |
328 | { |
329 | struct async *async = data; | |
ae6a5609 | 330 | return async->proc(async->proc_in, async->proc_out, async->data); |
618ebe9f JS |
331 | } |
332 | #endif | |
333 | ||
2d22c208 JS |
334 | int start_async(struct async *async) |
335 | { | |
ae6a5609 EFL |
336 | int need_in, need_out; |
337 | int fdin[2], fdout[2]; | |
338 | int proc_in, proc_out; | |
2d22c208 | 339 | |
ae6a5609 EFL |
340 | need_in = async->in < 0; |
341 | if (need_in) { | |
342 | if (pipe(fdin) < 0) { | |
343 | if (async->out > 0) | |
344 | close(async->out); | |
345 | return error("cannot create pipe: %s", strerror(errno)); | |
346 | } | |
347 | async->in = fdin[1]; | |
348 | } | |
349 | ||
350 | need_out = async->out < 0; | |
351 | if (need_out) { | |
352 | if (pipe(fdout) < 0) { | |
353 | if (need_in) | |
354 | close_pair(fdin); | |
355 | else if (async->in) | |
356 | close(async->in); | |
357 | return error("cannot create pipe: %s", strerror(errno)); | |
358 | } | |
359 | async->out = fdout[0]; | |
360 | } | |
361 | ||
362 | if (need_in) | |
363 | proc_in = fdin[0]; | |
364 | else if (async->in) | |
365 | proc_in = async->in; | |
366 | else | |
367 | proc_in = -1; | |
368 | ||
369 | if (need_out) | |
370 | proc_out = fdout[1]; | |
371 | else if (async->out) | |
372 | proc_out = async->out; | |
373 | else | |
374 | proc_out = -1; | |
2d22c208 | 375 | |
71064e3f | 376 | #ifndef WIN32 |
2c3766f0 AM |
377 | /* Flush stdio before fork() to avoid cloning buffers */ |
378 | fflush(NULL); | |
379 | ||
2d22c208 JS |
380 | async->pid = fork(); |
381 | if (async->pid < 0) { | |
382 | error("fork (async) failed: %s", strerror(errno)); | |
ae6a5609 | 383 | goto error; |
2d22c208 JS |
384 | } |
385 | if (!async->pid) { | |
ae6a5609 EFL |
386 | if (need_in) |
387 | close(fdin[1]); | |
388 | if (need_out) | |
389 | close(fdout[0]); | |
390 | exit(!!async->proc(proc_in, proc_out, async->data)); | |
2d22c208 | 391 | } |
ae6a5609 EFL |
392 | |
393 | if (need_in) | |
394 | close(fdin[0]); | |
395 | else if (async->in) | |
396 | close(async->in); | |
397 | ||
398 | if (need_out) | |
399 | close(fdout[1]); | |
400 | else if (async->out) | |
401 | close(async->out); | |
618ebe9f | 402 | #else |
ae6a5609 EFL |
403 | async->proc_in = proc_in; |
404 | async->proc_out = proc_out; | |
618ebe9f JS |
405 | async->tid = (HANDLE) _beginthreadex(NULL, 0, run_thread, async, 0, NULL); |
406 | if (!async->tid) { | |
407 | error("cannot create thread: %s", strerror(errno)); | |
ae6a5609 | 408 | goto error; |
618ebe9f JS |
409 | } |
410 | #endif | |
2d22c208 | 411 | return 0; |
ae6a5609 EFL |
412 | |
413 | error: | |
414 | if (need_in) | |
415 | close_pair(fdin); | |
416 | else if (async->in) | |
417 | close(async->in); | |
418 | ||
419 | if (need_out) | |
420 | close_pair(fdout); | |
421 | else if (async->out) | |
422 | close(async->out); | |
423 | return -1; | |
2d22c208 JS |
424 | } |
425 | ||
426 | int finish_async(struct async *async) | |
427 | { | |
71064e3f | 428 | #ifndef WIN32 |
c024beb5 | 429 | int ret = wait_or_whine(async->pid, "child process", 0); |
618ebe9f JS |
430 | #else |
431 | DWORD ret = 0; | |
432 | if (WaitForSingleObject(async->tid, INFINITE) != WAIT_OBJECT_0) | |
433 | ret = error("waiting for thread failed: %lu", GetLastError()); | |
434 | else if (!GetExitCodeThread(async->tid, &ret)) | |
435 | ret = error("cannot get thread exit code: %lu", GetLastError()); | |
436 | CloseHandle(async->tid); | |
437 | #endif | |
2d22c208 JS |
438 | return ret; |
439 | } | |
ae98a008 SB |
440 | |
441 | int run_hook(const char *index_file, const char *name, ...) | |
442 | { | |
443 | struct child_process hook; | |
14e6298f | 444 | const char **argv = NULL, *env[2]; |
ae98a008 SB |
445 | char index[PATH_MAX]; |
446 | va_list args; | |
447 | int ret; | |
14e6298f | 448 | size_t i = 0, alloc = 0; |
ae98a008 | 449 | |
cf94ca8e SB |
450 | if (access(git_path("hooks/%s", name), X_OK) < 0) |
451 | return 0; | |
452 | ||
ae98a008 | 453 | va_start(args, name); |
14e6298f SB |
454 | ALLOC_GROW(argv, i + 1, alloc); |
455 | argv[i++] = git_path("hooks/%s", name); | |
456 | while (argv[i-1]) { | |
457 | ALLOC_GROW(argv, i + 1, alloc); | |
458 | argv[i++] = va_arg(args, const char *); | |
459 | } | |
ae98a008 SB |
460 | va_end(args); |
461 | ||
ae98a008 SB |
462 | memset(&hook, 0, sizeof(hook)); |
463 | hook.argv = argv; | |
464 | hook.no_stdin = 1; | |
465 | hook.stdout_to_stderr = 1; | |
466 | if (index_file) { | |
467 | snprintf(index, sizeof(index), "GIT_INDEX_FILE=%s", index_file); | |
468 | env[0] = index; | |
469 | env[1] = NULL; | |
470 | hook.env = env; | |
471 | } | |
472 | ||
0ac77ec3 | 473 | ret = run_command(&hook); |
14e6298f | 474 | free(argv); |
ae98a008 SB |
475 | return ret; |
476 | } |