Josef Weidendorfer | b1bf95b | 2005-07-31 21:17:43 +0200 | [diff] [blame] | 1 | #include "cache.h" |
| 2 | #include "run-command.h" |
Stefan Beller | d807c4a | 2018-04-10 14:26:18 -0700 | [diff] [blame] | 3 | #include "exec-cmd.h" |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 4 | #include "sigchain.h" |
Jeff King | dbbcd44 | 2020-07-28 16:23:39 -0400 | [diff] [blame] | 5 | #include "strvec.h" |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 6 | #include "thread-utils.h" |
| 7 | #include "strbuf.h" |
Damien Marié | f805a00 | 2017-10-06 08:07:55 +0000 | [diff] [blame] | 8 | #include "string-list.h" |
Nguyễn Thái Ngọc Duy | e73dd78 | 2018-01-18 16:45:09 +0700 | [diff] [blame] | 9 | #include "quote.h" |
Derrick Stolee | 1942d48 | 2020-08-28 15:45:12 +0000 | [diff] [blame] | 10 | #include "config.h" |
Josef Weidendorfer | b1bf95b | 2005-07-31 21:17:43 +0200 | [diff] [blame] | 11 | |
René Scharfe | 483bbd4 | 2014-08-19 21:10:48 +0200 | [diff] [blame] | 12 | void child_process_init(struct child_process *child) |
| 13 | { |
Ævar Arnfjörð Bjarmason | 5726a6b | 2021-07-01 12:51:26 +0200 | [diff] [blame] | 14 | struct child_process blank = CHILD_PROCESS_INIT; |
| 15 | memcpy(child, &blank, sizeof(*child)); |
René Scharfe | 483bbd4 | 2014-08-19 21:10:48 +0200 | [diff] [blame] | 16 | } |
| 17 | |
René Scharfe | 2d71608 | 2015-10-24 14:11:27 +0200 | [diff] [blame] | 18 | void child_process_clear(struct child_process *child) |
| 19 | { |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 20 | strvec_clear(&child->args); |
| 21 | strvec_clear(&child->env_array); |
René Scharfe | 2d71608 | 2015-10-24 14:11:27 +0200 | [diff] [blame] | 22 | } |
| 23 | |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 24 | struct child_to_clean { |
| 25 | pid_t pid; |
Lars Schneider | ac2fbaa | 2016-10-16 16:20:28 -0700 | [diff] [blame] | 26 | struct child_process *process; |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 27 | struct child_to_clean *next; |
| 28 | }; |
| 29 | static struct child_to_clean *children_to_clean; |
| 30 | static int installed_child_cleanup_handler; |
| 31 | |
Takashi Iwai | 507d780 | 2015-09-04 11:35:57 +0200 | [diff] [blame] | 32 | static void cleanup_children(int sig, int in_signal) |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 33 | { |
Jeff King | 46df690 | 2017-01-06 20:22:23 -0500 | [diff] [blame] | 34 | struct child_to_clean *children_to_wait_for = NULL; |
| 35 | |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 36 | while (children_to_clean) { |
| 37 | struct child_to_clean *p = children_to_clean; |
| 38 | children_to_clean = p->next; |
Lars Schneider | ac2fbaa | 2016-10-16 16:20:28 -0700 | [diff] [blame] | 39 | |
| 40 | if (p->process && !in_signal) { |
| 41 | struct child_process *process = p->process; |
| 42 | if (process->clean_on_exit_handler) { |
| 43 | trace_printf( |
| 44 | "trace: run_command: running exit handler for pid %" |
| 45 | PRIuMAX, (uintmax_t)p->pid |
| 46 | ); |
| 47 | process->clean_on_exit_handler(process); |
| 48 | } |
| 49 | } |
| 50 | |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 51 | kill(p->pid, sig); |
Jeff King | 46df690 | 2017-01-06 20:22:23 -0500 | [diff] [blame] | 52 | |
Jeff King | 7b91929 | 2017-03-17 19:20:04 -0400 | [diff] [blame] | 53 | if (p->process && p->process->wait_after_clean) { |
Jeff King | 46df690 | 2017-01-06 20:22:23 -0500 | [diff] [blame] | 54 | p->next = children_to_wait_for; |
| 55 | children_to_wait_for = p; |
| 56 | } else { |
| 57 | if (!in_signal) |
| 58 | free(p); |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | while (children_to_wait_for) { |
| 63 | struct child_to_clean *p = children_to_wait_for; |
| 64 | children_to_wait_for = p->next; |
| 65 | |
| 66 | while (waitpid(p->pid, NULL, 0) < 0 && errno == EINTR) |
| 67 | ; /* spin waiting for process exit or error */ |
| 68 | |
Takashi Iwai | 507d780 | 2015-09-04 11:35:57 +0200 | [diff] [blame] | 69 | if (!in_signal) |
| 70 | free(p); |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 71 | } |
| 72 | } |
| 73 | |
| 74 | static void cleanup_children_on_signal(int sig) |
| 75 | { |
Takashi Iwai | 507d780 | 2015-09-04 11:35:57 +0200 | [diff] [blame] | 76 | cleanup_children(sig, 1); |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 77 | sigchain_pop(sig); |
| 78 | raise(sig); |
| 79 | } |
| 80 | |
| 81 | static void cleanup_children_on_exit(void) |
| 82 | { |
Takashi Iwai | 507d780 | 2015-09-04 11:35:57 +0200 | [diff] [blame] | 83 | cleanup_children(SIGTERM, 0); |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 84 | } |
| 85 | |
Lars Schneider | ac2fbaa | 2016-10-16 16:20:28 -0700 | [diff] [blame] | 86 | static void mark_child_for_cleanup(pid_t pid, struct child_process *process) |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 87 | { |
| 88 | struct child_to_clean *p = xmalloc(sizeof(*p)); |
| 89 | p->pid = pid; |
Lars Schneider | ac2fbaa | 2016-10-16 16:20:28 -0700 | [diff] [blame] | 90 | p->process = process; |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 91 | p->next = children_to_clean; |
| 92 | children_to_clean = p; |
| 93 | |
| 94 | if (!installed_child_cleanup_handler) { |
| 95 | atexit(cleanup_children_on_exit); |
| 96 | sigchain_push_common(cleanup_children_on_signal); |
| 97 | installed_child_cleanup_handler = 1; |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | static void clear_child_for_cleanup(pid_t pid) |
| 102 | { |
David Gould | bdee397 | 2012-09-11 15:32:47 +0100 | [diff] [blame] | 103 | struct child_to_clean **pp; |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 104 | |
David Gould | bdee397 | 2012-09-11 15:32:47 +0100 | [diff] [blame] | 105 | for (pp = &children_to_clean; *pp; pp = &(*pp)->next) { |
| 106 | struct child_to_clean *clean_me = *pp; |
| 107 | |
| 108 | if (clean_me->pid == pid) { |
| 109 | *pp = clean_me->next; |
| 110 | free(clean_me); |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 111 | return; |
| 112 | } |
| 113 | } |
| 114 | } |
| 115 | |
Shawn O. Pearce | 9dc09c7 | 2007-03-12 14:37:28 -0400 | [diff] [blame] | 116 | static inline void close_pair(int fd[2]) |
| 117 | { |
| 118 | close(fd[0]); |
| 119 | close(fd[1]); |
| 120 | } |
| 121 | |
Brandon Williams | 38124a4 | 2017-04-25 16:46:59 -0700 | [diff] [blame] | 122 | int is_executable(const char *name) |
| 123 | { |
| 124 | struct stat st; |
| 125 | |
| 126 | if (stat(name, &st) || /* stat, not lstat */ |
| 127 | !S_ISREG(st.st_mode)) |
| 128 | return 0; |
| 129 | |
| 130 | #if defined(GIT_WINDOWS_NATIVE) |
| 131 | /* |
| 132 | * On Windows there is no executable bit. The file extension |
| 133 | * indicates whether it can be run as an executable, and Git |
| 134 | * has special-handling to detect scripts and launch them |
| 135 | * through the indicated script interpreter. We test for the |
| 136 | * file extension first because virus scanners may make |
| 137 | * it quite expensive to open many files. |
| 138 | */ |
| 139 | if (ends_with(name, ".exe")) |
| 140 | return S_IXUSR; |
| 141 | |
| 142 | { |
| 143 | /* |
| 144 | * Now that we know it does not have an executable extension, |
| 145 | * peek into the file instead. |
| 146 | */ |
| 147 | char buf[3] = { 0 }; |
| 148 | int n; |
| 149 | int fd = open(name, O_RDONLY); |
| 150 | st.st_mode &= ~S_IXUSR; |
| 151 | if (fd >= 0) { |
| 152 | n = read(fd, buf, 2); |
| 153 | if (n == 2) |
| 154 | /* look for a she-bang */ |
| 155 | if (!strcmp(buf, "#!")) |
| 156 | st.st_mode |= S_IXUSR; |
| 157 | close(fd); |
| 158 | } |
| 159 | } |
| 160 | #endif |
| 161 | return st.st_mode & S_IXUSR; |
| 162 | } |
| 163 | |
Brandon Williams | 9402831 | 2017-04-25 16:47:00 -0700 | [diff] [blame] | 164 | /* |
| 165 | * Search $PATH for a command. This emulates the path search that |
| 166 | * execvp would perform, without actually executing the command so it |
| 167 | * can be used before fork() to prepare to run a command using |
| 168 | * execve() or after execvp() to diagnose why it failed. |
| 169 | * |
| 170 | * The caller should ensure that file contains no directory |
| 171 | * separators. |
| 172 | * |
| 173 | * Returns the path to the command, as found in $PATH or NULL if the |
| 174 | * command could not be found. The caller inherits ownership of the memory |
| 175 | * used to store the resultant path. |
| 176 | * |
| 177 | * This should not be used on Windows, where the $PATH search rules |
| 178 | * are more complicated (e.g., a search for "foo" should find |
| 179 | * "foo.exe"). |
| 180 | */ |
Jeff King | 38f865c | 2012-03-30 03:52:18 -0400 | [diff] [blame] | 181 | static char *locate_in_PATH(const char *file) |
| 182 | { |
| 183 | const char *p = getenv("PATH"); |
| 184 | struct strbuf buf = STRBUF_INIT; |
| 185 | |
| 186 | if (!p || !*p) |
| 187 | return NULL; |
| 188 | |
| 189 | while (1) { |
| 190 | const char *end = strchrnul(p, ':'); |
| 191 | |
| 192 | strbuf_reset(&buf); |
| 193 | |
| 194 | /* POSIX specifies an empty entry as the current directory. */ |
| 195 | if (end != p) { |
| 196 | strbuf_add(&buf, p, end - p); |
| 197 | strbuf_addch(&buf, '/'); |
| 198 | } |
| 199 | strbuf_addstr(&buf, file); |
| 200 | |
Brandon Williams | 9402831 | 2017-04-25 16:47:00 -0700 | [diff] [blame] | 201 | if (is_executable(buf.buf)) |
Jeff King | 38f865c | 2012-03-30 03:52:18 -0400 | [diff] [blame] | 202 | return strbuf_detach(&buf, NULL); |
| 203 | |
| 204 | if (!*end) |
| 205 | break; |
| 206 | p = end + 1; |
| 207 | } |
| 208 | |
| 209 | strbuf_release(&buf); |
| 210 | return NULL; |
| 211 | } |
| 212 | |
| 213 | static int exists_in_PATH(const char *file) |
| 214 | { |
| 215 | char *r = locate_in_PATH(file); |
brian m. carlson | 63ab08f | 2020-01-07 01:36:40 +0000 | [diff] [blame] | 216 | int found = r != NULL; |
Jeff King | 38f865c | 2012-03-30 03:52:18 -0400 | [diff] [blame] | 217 | free(r); |
brian m. carlson | 63ab08f | 2020-01-07 01:36:40 +0000 | [diff] [blame] | 218 | return found; |
Jeff King | 38f865c | 2012-03-30 03:52:18 -0400 | [diff] [blame] | 219 | } |
| 220 | |
| 221 | int sane_execvp(const char *file, char * const argv[]) |
| 222 | { |
Jeff Hostetler | ee4512e | 2019-02-22 14:25:01 -0800 | [diff] [blame] | 223 | #ifndef GIT_WINDOWS_NATIVE |
| 224 | /* |
| 225 | * execvp() doesn't return, so we all we can do is tell trace2 |
| 226 | * what we are about to do and let it leave a hint in the log |
| 227 | * (unless of course the execvp() fails). |
| 228 | * |
| 229 | * we skip this for Windows because the compat layer already |
| 230 | * has to emulate the execvp() call anyway. |
| 231 | */ |
| 232 | int exec_id = trace2_exec(file, (const char **)argv); |
| 233 | #endif |
| 234 | |
Jeff King | 38f865c | 2012-03-30 03:52:18 -0400 | [diff] [blame] | 235 | if (!execvp(file, argv)) |
| 236 | return 0; /* cannot happen ;-) */ |
| 237 | |
Jeff Hostetler | ee4512e | 2019-02-22 14:25:01 -0800 | [diff] [blame] | 238 | #ifndef GIT_WINDOWS_NATIVE |
| 239 | { |
| 240 | int ec = errno; |
| 241 | trace2_exec_result(exec_id, ec); |
| 242 | errno = ec; |
| 243 | } |
| 244 | #endif |
| 245 | |
Jeff King | 38f865c | 2012-03-30 03:52:18 -0400 | [diff] [blame] | 246 | /* |
| 247 | * When a command can't be found because one of the directories |
| 248 | * listed in $PATH is unsearchable, execvp reports EACCES, but |
| 249 | * careful usability testing (read: analysis of occasional bug |
| 250 | * reports) reveals that "No such file or directory" is more |
| 251 | * intuitive. |
| 252 | * |
| 253 | * We avoid commands with "/", because execvp will not do $PATH |
| 254 | * lookups in that case. |
| 255 | * |
| 256 | * The reassignment of EACCES to errno looks like a no-op below, |
| 257 | * but we need to protect against exists_in_PATH overwriting errno. |
| 258 | */ |
| 259 | if (errno == EACCES && !strchr(file, '/')) |
| 260 | errno = exists_in_PATH(file) ? EACCES : ENOENT; |
Junio C Hamano | a785508 | 2012-07-31 12:51:30 -0700 | [diff] [blame] | 261 | else if (errno == ENOTDIR && !strchr(file, '/')) |
| 262 | errno = ENOENT; |
Jeff King | 38f865c | 2012-03-30 03:52:18 -0400 | [diff] [blame] | 263 | return -1; |
| 264 | } |
| 265 | |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 266 | static const char **prepare_shell_cmd(struct strvec *out, const char **argv) |
Jeff King | 8dba1e6 | 2009-12-30 05:53:16 -0500 | [diff] [blame] | 267 | { |
Jeff King | 20574f5 | 2016-02-22 17:44:39 -0500 | [diff] [blame] | 268 | if (!argv[0]) |
Johannes Schindelin | 033abf9 | 2018-05-02 11:38:39 +0200 | [diff] [blame] | 269 | BUG("shell command is empty"); |
Jeff King | 8dba1e6 | 2009-12-30 05:53:16 -0500 | [diff] [blame] | 270 | |
Jeff King | f445644 | 2009-12-30 05:55:36 -0500 | [diff] [blame] | 271 | if (strcspn(argv[0], "|&;<>()$`\\\"' \t\n*?[#~=%") != strlen(argv[0])) { |
Jonathan Nieder | 380395d | 2013-05-02 20:26:08 +0100 | [diff] [blame] | 272 | #ifndef GIT_WINDOWS_NATIVE |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 273 | strvec_push(out, SHELL_PATH); |
Johannes Sixt | 7762975 | 2012-04-17 09:03:21 +0200 | [diff] [blame] | 274 | #else |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 275 | strvec_push(out, "sh"); |
Johannes Sixt | 7762975 | 2012-04-17 09:03:21 +0200 | [diff] [blame] | 276 | #endif |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 277 | strvec_push(out, "-c"); |
Jeff King | 8dba1e6 | 2009-12-30 05:53:16 -0500 | [diff] [blame] | 278 | |
Jeff King | 20574f5 | 2016-02-22 17:44:39 -0500 | [diff] [blame] | 279 | /* |
| 280 | * If we have no extra arguments, we do not even need to |
| 281 | * bother with the "$@" magic. |
| 282 | */ |
| 283 | if (!argv[1]) |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 284 | strvec_push(out, argv[0]); |
Jeff King | 20574f5 | 2016-02-22 17:44:39 -0500 | [diff] [blame] | 285 | else |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 286 | strvec_pushf(out, "%s \"$@\"", argv[0]); |
Jeff King | 8dba1e6 | 2009-12-30 05:53:16 -0500 | [diff] [blame] | 287 | } |
| 288 | |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 289 | strvec_pushv(out, argv); |
Jeff King | d70a9eb | 2020-07-28 20:37:20 -0400 | [diff] [blame] | 290 | return out->v; |
Jeff King | 8dba1e6 | 2009-12-30 05:53:16 -0500 | [diff] [blame] | 291 | } |
| 292 | |
Jonathan Nieder | 380395d | 2013-05-02 20:26:08 +0100 | [diff] [blame] | 293 | #ifndef GIT_WINDOWS_NATIVE |
Johannes Sixt | 2b541bf | 2010-01-10 14:11:22 +0100 | [diff] [blame] | 294 | static int child_notifier = -1; |
| 295 | |
Brandon Williams | 79319b1 | 2017-04-19 16:13:24 -0700 | [diff] [blame] | 296 | enum child_errcode { |
| 297 | CHILD_ERR_CHDIR, |
Brandon Williams | 53fa675 | 2017-04-19 16:13:25 -0700 | [diff] [blame] | 298 | CHILD_ERR_DUP2, |
| 299 | CHILD_ERR_CLOSE, |
Eric Wong | 45afb1c | 2017-04-19 16:13:27 -0700 | [diff] [blame] | 300 | CHILD_ERR_SIGPROCMASK, |
Brandon Williams | 79319b1 | 2017-04-19 16:13:24 -0700 | [diff] [blame] | 301 | CHILD_ERR_ENOENT, |
| 302 | CHILD_ERR_SILENT, |
| 303 | CHILD_ERR_ERRNO |
| 304 | }; |
| 305 | |
| 306 | struct child_err { |
| 307 | enum child_errcode err; |
| 308 | int syserr; /* errno */ |
| 309 | }; |
| 310 | |
| 311 | static void child_die(enum child_errcode err) |
Johannes Sixt | 2b541bf | 2010-01-10 14:11:22 +0100 | [diff] [blame] | 312 | { |
Brandon Williams | 79319b1 | 2017-04-19 16:13:24 -0700 | [diff] [blame] | 313 | struct child_err buf; |
| 314 | |
| 315 | buf.err = err; |
| 316 | buf.syserr = errno; |
| 317 | |
| 318 | /* write(2) on buf smaller than PIPE_BUF (min 512) is atomic: */ |
| 319 | xwrite(child_notifier, &buf, sizeof(buf)); |
| 320 | _exit(1); |
| 321 | } |
| 322 | |
Brandon Williams | 53fa675 | 2017-04-19 16:13:25 -0700 | [diff] [blame] | 323 | static void child_dup2(int fd, int to) |
| 324 | { |
| 325 | if (dup2(fd, to) < 0) |
| 326 | child_die(CHILD_ERR_DUP2); |
| 327 | } |
| 328 | |
| 329 | static void child_close(int fd) |
| 330 | { |
| 331 | if (close(fd)) |
| 332 | child_die(CHILD_ERR_CLOSE); |
| 333 | } |
| 334 | |
| 335 | static void child_close_pair(int fd[2]) |
| 336 | { |
| 337 | child_close(fd[0]); |
| 338 | child_close(fd[1]); |
| 339 | } |
| 340 | |
Brandon Williams | 79319b1 | 2017-04-19 16:13:24 -0700 | [diff] [blame] | 341 | /* |
| 342 | * parent will make it look like the child spewed a fatal error and died |
| 343 | * this is needed to prevent changes to t0061. |
| 344 | */ |
| 345 | static void fake_fatal(const char *err, va_list params) |
| 346 | { |
| 347 | vreportf("fatal: ", err, params); |
| 348 | } |
| 349 | |
| 350 | static void child_error_fn(const char *err, va_list params) |
| 351 | { |
| 352 | const char msg[] = "error() should not be called in child\n"; |
| 353 | xwrite(2, msg, sizeof(msg) - 1); |
| 354 | } |
| 355 | |
| 356 | static void child_warn_fn(const char *err, va_list params) |
| 357 | { |
| 358 | const char msg[] = "warn() should not be called in child\n"; |
| 359 | xwrite(2, msg, sizeof(msg) - 1); |
| 360 | } |
| 361 | |
| 362 | static void NORETURN child_die_fn(const char *err, va_list params) |
| 363 | { |
| 364 | const char msg[] = "die() should not be called in child\n"; |
| 365 | xwrite(2, msg, sizeof(msg) - 1); |
| 366 | _exit(2); |
| 367 | } |
| 368 | |
| 369 | /* this runs in the parent process */ |
| 370 | static void child_err_spew(struct child_process *cmd, struct child_err *cerr) |
| 371 | { |
| 372 | static void (*old_errfn)(const char *err, va_list params); |
| 373 | |
| 374 | old_errfn = get_error_routine(); |
| 375 | set_error_routine(fake_fatal); |
| 376 | errno = cerr->syserr; |
| 377 | |
| 378 | switch (cerr->err) { |
| 379 | case CHILD_ERR_CHDIR: |
| 380 | error_errno("exec '%s': cd to '%s' failed", |
| 381 | cmd->argv[0], cmd->dir); |
| 382 | break; |
Brandon Williams | 53fa675 | 2017-04-19 16:13:25 -0700 | [diff] [blame] | 383 | case CHILD_ERR_DUP2: |
| 384 | error_errno("dup2() in child failed"); |
| 385 | break; |
| 386 | case CHILD_ERR_CLOSE: |
| 387 | error_errno("close() in child failed"); |
| 388 | break; |
Eric Wong | 45afb1c | 2017-04-19 16:13:27 -0700 | [diff] [blame] | 389 | case CHILD_ERR_SIGPROCMASK: |
| 390 | error_errno("sigprocmask failed restoring signals"); |
| 391 | break; |
Brandon Williams | 79319b1 | 2017-04-19 16:13:24 -0700 | [diff] [blame] | 392 | case CHILD_ERR_ENOENT: |
| 393 | error_errno("cannot run %s", cmd->argv[0]); |
| 394 | break; |
| 395 | case CHILD_ERR_SILENT: |
| 396 | break; |
| 397 | case CHILD_ERR_ERRNO: |
| 398 | error_errno("cannot exec '%s'", cmd->argv[0]); |
| 399 | break; |
| 400 | } |
| 401 | set_error_routine(old_errfn); |
Johannes Sixt | 2b541bf | 2010-01-10 14:11:22 +0100 | [diff] [blame] | 402 | } |
Brandon Williams | 3967e25 | 2017-04-19 16:13:19 -0700 | [diff] [blame] | 403 | |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 404 | static int prepare_cmd(struct strvec *out, const struct child_process *cmd) |
Brandon Williams | 3967e25 | 2017-04-19 16:13:19 -0700 | [diff] [blame] | 405 | { |
| 406 | if (!cmd->argv[0]) |
Johannes Schindelin | 033abf9 | 2018-05-02 11:38:39 +0200 | [diff] [blame] | 407 | BUG("command is empty"); |
Brandon Williams | 3967e25 | 2017-04-19 16:13:19 -0700 | [diff] [blame] | 408 | |
Brandon Williams | e3a4344 | 2017-04-19 16:13:20 -0700 | [diff] [blame] | 409 | /* |
| 410 | * Add SHELL_PATH so in the event exec fails with ENOEXEC we can |
| 411 | * attempt to interpret the command with 'sh'. |
| 412 | */ |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 413 | strvec_push(out, SHELL_PATH); |
Brandon Williams | e3a4344 | 2017-04-19 16:13:20 -0700 | [diff] [blame] | 414 | |
Brandon Williams | 3967e25 | 2017-04-19 16:13:19 -0700 | [diff] [blame] | 415 | if (cmd->git_cmd) { |
René Scharfe | 54a7a64 | 2019-11-26 10:06:36 +0100 | [diff] [blame] | 416 | prepare_git_cmd(out, cmd->argv); |
Brandon Williams | 3967e25 | 2017-04-19 16:13:19 -0700 | [diff] [blame] | 417 | } else if (cmd->use_shell) { |
| 418 | prepare_shell_cmd(out, cmd->argv); |
| 419 | } else { |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 420 | strvec_pushv(out, cmd->argv); |
Brandon Williams | 3967e25 | 2017-04-19 16:13:19 -0700 | [diff] [blame] | 421 | } |
Brandon Williams | e3a4344 | 2017-04-19 16:13:20 -0700 | [diff] [blame] | 422 | |
| 423 | /* |
Andras Kucsma | 05ac858 | 2020-03-27 00:36:43 +0000 | [diff] [blame] | 424 | * If there are no dir separator characters in the command then perform |
| 425 | * a path lookup and use the resolved path as the command to exec. If |
| 426 | * there are dir separator characters, we have exec attempt to invoke |
| 427 | * the command directly. |
Brandon Williams | e3a4344 | 2017-04-19 16:13:20 -0700 | [diff] [blame] | 428 | */ |
Jeff King | d70a9eb | 2020-07-28 20:37:20 -0400 | [diff] [blame] | 429 | if (!has_dir_sep(out->v[1])) { |
| 430 | char *program = locate_in_PATH(out->v[1]); |
Brandon Williams | e3a4344 | 2017-04-19 16:13:20 -0700 | [diff] [blame] | 431 | if (program) { |
Jeff King | d70a9eb | 2020-07-28 20:37:20 -0400 | [diff] [blame] | 432 | free((char *)out->v[1]); |
| 433 | out->v[1] = program; |
Jeff King | 321fd82 | 2018-10-24 03:38:00 -0400 | [diff] [blame] | 434 | } else { |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 435 | strvec_clear(out); |
Jeff King | 321fd82 | 2018-10-24 03:38:00 -0400 | [diff] [blame] | 436 | errno = ENOENT; |
| 437 | return -1; |
Brandon Williams | e3a4344 | 2017-04-19 16:13:20 -0700 | [diff] [blame] | 438 | } |
| 439 | } |
Jeff King | 321fd82 | 2018-10-24 03:38:00 -0400 | [diff] [blame] | 440 | |
| 441 | return 0; |
Brandon Williams | 3967e25 | 2017-04-19 16:13:19 -0700 | [diff] [blame] | 442 | } |
Brandon Williams | ae25394 | 2017-04-19 16:13:22 -0700 | [diff] [blame] | 443 | |
| 444 | static char **prep_childenv(const char *const *deltaenv) |
| 445 | { |
| 446 | extern char **environ; |
| 447 | char **childenv; |
| 448 | struct string_list env = STRING_LIST_INIT_DUP; |
| 449 | struct strbuf key = STRBUF_INIT; |
| 450 | const char *const *p; |
| 451 | int i; |
| 452 | |
| 453 | /* Construct a sorted string list consisting of the current environ */ |
| 454 | for (p = (const char *const *) environ; p && *p; p++) { |
| 455 | const char *equals = strchr(*p, '='); |
| 456 | |
| 457 | if (equals) { |
| 458 | strbuf_reset(&key); |
| 459 | strbuf_add(&key, *p, equals - *p); |
| 460 | string_list_append(&env, key.buf)->util = (void *) *p; |
| 461 | } else { |
| 462 | string_list_append(&env, *p)->util = (void *) *p; |
| 463 | } |
| 464 | } |
| 465 | string_list_sort(&env); |
| 466 | |
| 467 | /* Merge in 'deltaenv' with the current environ */ |
| 468 | for (p = deltaenv; p && *p; p++) { |
| 469 | const char *equals = strchr(*p, '='); |
| 470 | |
| 471 | if (equals) { |
| 472 | /* ('key=value'), insert or replace entry */ |
| 473 | strbuf_reset(&key); |
| 474 | strbuf_add(&key, *p, equals - *p); |
| 475 | string_list_insert(&env, key.buf)->util = (void *) *p; |
| 476 | } else { |
| 477 | /* otherwise ('key') remove existing entry */ |
| 478 | string_list_remove(&env, *p, 0); |
| 479 | } |
| 480 | } |
| 481 | |
| 482 | /* Create an array of 'char *' to be used as the childenv */ |
René Scharfe | 0e187d7 | 2017-10-01 17:14:31 +0200 | [diff] [blame] | 483 | ALLOC_ARRAY(childenv, env.nr + 1); |
Brandon Williams | ae25394 | 2017-04-19 16:13:22 -0700 | [diff] [blame] | 484 | for (i = 0; i < env.nr; i++) |
| 485 | childenv[i] = env.items[i].util; |
| 486 | childenv[env.nr] = NULL; |
| 487 | |
| 488 | string_list_clear(&env, 0); |
| 489 | strbuf_release(&key); |
| 490 | return childenv; |
| 491 | } |
Eric Wong | 45afb1c | 2017-04-19 16:13:27 -0700 | [diff] [blame] | 492 | |
| 493 | struct atfork_state { |
| 494 | #ifndef NO_PTHREADS |
| 495 | int cs; |
Johannes Sixt | 200a76b | 2010-03-06 16:40:42 +0100 | [diff] [blame] | 496 | #endif |
Eric Wong | 45afb1c | 2017-04-19 16:13:27 -0700 | [diff] [blame] | 497 | sigset_t old; |
| 498 | }; |
| 499 | |
Johannes Schindelin | dde74d7 | 2018-05-02 11:38:31 +0200 | [diff] [blame] | 500 | #define CHECK_BUG(err, msg) \ |
| 501 | do { \ |
| 502 | int e = (err); \ |
| 503 | if (e) \ |
| 504 | BUG("%s: %s", msg, strerror(e)); \ |
| 505 | } while(0) |
Eric Wong | 45afb1c | 2017-04-19 16:13:27 -0700 | [diff] [blame] | 506 | |
| 507 | static void atfork_prepare(struct atfork_state *as) |
| 508 | { |
| 509 | sigset_t all; |
| 510 | |
| 511 | if (sigfillset(&all)) |
| 512 | die_errno("sigfillset"); |
| 513 | #ifdef NO_PTHREADS |
| 514 | if (sigprocmask(SIG_SETMASK, &all, &as->old)) |
| 515 | die_errno("sigprocmask"); |
| 516 | #else |
Johannes Schindelin | dde74d7 | 2018-05-02 11:38:31 +0200 | [diff] [blame] | 517 | CHECK_BUG(pthread_sigmask(SIG_SETMASK, &all, &as->old), |
Eric Wong | 45afb1c | 2017-04-19 16:13:27 -0700 | [diff] [blame] | 518 | "blocking all signals"); |
Johannes Schindelin | dde74d7 | 2018-05-02 11:38:31 +0200 | [diff] [blame] | 519 | CHECK_BUG(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &as->cs), |
Eric Wong | 45afb1c | 2017-04-19 16:13:27 -0700 | [diff] [blame] | 520 | "disabling cancellation"); |
| 521 | #endif |
| 522 | } |
| 523 | |
| 524 | static void atfork_parent(struct atfork_state *as) |
| 525 | { |
| 526 | #ifdef NO_PTHREADS |
| 527 | if (sigprocmask(SIG_SETMASK, &as->old, NULL)) |
| 528 | die_errno("sigprocmask"); |
| 529 | #else |
Johannes Schindelin | dde74d7 | 2018-05-02 11:38:31 +0200 | [diff] [blame] | 530 | CHECK_BUG(pthread_setcancelstate(as->cs, NULL), |
Eric Wong | 45afb1c | 2017-04-19 16:13:27 -0700 | [diff] [blame] | 531 | "re-enabling cancellation"); |
Johannes Schindelin | dde74d7 | 2018-05-02 11:38:31 +0200 | [diff] [blame] | 532 | CHECK_BUG(pthread_sigmask(SIG_SETMASK, &as->old, NULL), |
Eric Wong | 45afb1c | 2017-04-19 16:13:27 -0700 | [diff] [blame] | 533 | "restoring signal mask"); |
| 534 | #endif |
| 535 | } |
| 536 | #endif /* GIT_WINDOWS_NATIVE */ |
Johannes Sixt | a5487dd | 2010-01-10 14:07:52 +0100 | [diff] [blame] | 537 | |
| 538 | static inline void set_cloexec(int fd) |
| 539 | { |
| 540 | int flags = fcntl(fd, F_GETFD); |
| 541 | if (flags >= 0) |
| 542 | fcntl(fd, F_SETFD, flags | FD_CLOEXEC); |
| 543 | } |
Johannes Sixt | a5487dd | 2010-01-10 14:07:52 +0100 | [diff] [blame] | 544 | |
Takashi Iwai | 507d780 | 2015-09-04 11:35:57 +0200 | [diff] [blame] | 545 | static int wait_or_whine(pid_t pid, const char *argv0, int in_signal) |
Johannes Sixt | ab0b41d | 2010-01-10 14:08:45 +0100 | [diff] [blame] | 546 | { |
| 547 | int status, code = -1; |
| 548 | pid_t waiting; |
| 549 | int failed_errno = 0; |
| 550 | |
| 551 | while ((waiting = waitpid(pid, &status, 0)) < 0 && errno == EINTR) |
| 552 | ; /* nothing */ |
Ævar Arnfjörð Bjarmason | 85db79a | 2021-02-02 02:59:59 +0100 | [diff] [blame] | 553 | if (in_signal) { |
Ævar Arnfjörð Bjarmason | be8fc53 | 2021-02-02 03:00:00 +0100 | [diff] [blame] | 554 | if (WIFEXITED(status)) |
| 555 | code = WEXITSTATUS(status); |
| 556 | return code; |
Ævar Arnfjörð Bjarmason | 85db79a | 2021-02-02 02:59:59 +0100 | [diff] [blame] | 557 | } |
Johannes Sixt | ab0b41d | 2010-01-10 14:08:45 +0100 | [diff] [blame] | 558 | |
| 559 | if (waiting < 0) { |
| 560 | failed_errno = errno; |
Nguyễn Thái Ngọc Duy | fbcb0e0 | 2016-05-08 16:47:53 +0700 | [diff] [blame] | 561 | error_errno("waitpid for %s failed", argv0); |
Johannes Sixt | ab0b41d | 2010-01-10 14:08:45 +0100 | [diff] [blame] | 562 | } else if (waiting != pid) { |
| 563 | error("waitpid is confused (%s)", argv0); |
| 564 | } else if (WIFSIGNALED(status)) { |
| 565 | code = WTERMSIG(status); |
Jeff King | ac78663 | 2015-12-29 03:12:22 -0500 | [diff] [blame] | 566 | if (code != SIGINT && code != SIGQUIT && code != SIGPIPE) |
Jeff King | a2767c5 | 2012-11-30 17:41:38 -0500 | [diff] [blame] | 567 | error("%s died of signal %d", argv0, code); |
Johannes Sixt | ab0b41d | 2010-01-10 14:08:45 +0100 | [diff] [blame] | 568 | /* |
| 569 | * This return value is chosen so that code & 0xff |
| 570 | * mimics the exit code that a POSIX shell would report for |
| 571 | * a program that died from this signal. |
| 572 | */ |
Jeff King | 709ca73 | 2013-01-05 09:49:49 -0500 | [diff] [blame] | 573 | code += 128; |
Johannes Sixt | ab0b41d | 2010-01-10 14:08:45 +0100 | [diff] [blame] | 574 | } else if (WIFEXITED(status)) { |
| 575 | code = WEXITSTATUS(status); |
Johannes Sixt | ab0b41d | 2010-01-10 14:08:45 +0100 | [diff] [blame] | 576 | } else { |
| 577 | error("waitpid is confused (%s)", argv0); |
| 578 | } |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 579 | |
| 580 | clear_child_for_cleanup(pid); |
| 581 | |
Johannes Sixt | ab0b41d | 2010-01-10 14:08:45 +0100 | [diff] [blame] | 582 | errno = failed_errno; |
| 583 | return code; |
| 584 | } |
| 585 | |
Nguyễn Thái Ngọc Duy | c61a975 | 2018-01-18 16:45:11 +0700 | [diff] [blame] | 586 | static void trace_add_env(struct strbuf *dst, const char *const *deltaenv) |
| 587 | { |
| 588 | struct string_list envs = STRING_LIST_INIT_DUP; |
| 589 | const char *const *e; |
| 590 | int i; |
| 591 | int printed_unset = 0; |
| 592 | |
| 593 | /* Last one wins, see run-command.c:prep_childenv() for context */ |
| 594 | for (e = deltaenv; e && *e; e++) { |
| 595 | struct strbuf key = STRBUF_INIT; |
| 596 | char *equals = strchr(*e, '='); |
| 597 | |
| 598 | if (equals) { |
| 599 | strbuf_add(&key, *e, equals - *e); |
| 600 | string_list_insert(&envs, key.buf)->util = equals + 1; |
| 601 | } else { |
| 602 | string_list_insert(&envs, *e)->util = NULL; |
| 603 | } |
| 604 | strbuf_release(&key); |
| 605 | } |
| 606 | |
| 607 | /* "unset X Y...;" */ |
| 608 | for (i = 0; i < envs.nr; i++) { |
| 609 | const char *var = envs.items[i].string; |
| 610 | const char *val = envs.items[i].util; |
| 611 | |
| 612 | if (val || !getenv(var)) |
| 613 | continue; |
| 614 | |
| 615 | if (!printed_unset) { |
| 616 | strbuf_addstr(dst, " unset"); |
| 617 | printed_unset = 1; |
| 618 | } |
| 619 | strbuf_addf(dst, " %s", var); |
| 620 | } |
| 621 | if (printed_unset) |
| 622 | strbuf_addch(dst, ';'); |
| 623 | |
| 624 | /* ... followed by "A=B C=D ..." */ |
| 625 | for (i = 0; i < envs.nr; i++) { |
| 626 | const char *var = envs.items[i].string; |
| 627 | const char *val = envs.items[i].util; |
| 628 | const char *oldval; |
| 629 | |
| 630 | if (!val) |
| 631 | continue; |
| 632 | |
| 633 | oldval = getenv(var); |
| 634 | if (oldval && !strcmp(val, oldval)) |
| 635 | continue; |
| 636 | |
| 637 | strbuf_addf(dst, " %s=", var); |
| 638 | sq_quote_buf_pretty(dst, val); |
| 639 | } |
| 640 | string_list_clear(&envs, 0); |
| 641 | } |
| 642 | |
Nguyễn Thái Ngọc Duy | e73dd78 | 2018-01-18 16:45:09 +0700 | [diff] [blame] | 643 | static void trace_run_command(const struct child_process *cp) |
| 644 | { |
| 645 | struct strbuf buf = STRBUF_INIT; |
| 646 | |
| 647 | if (!trace_want(&trace_default_key)) |
| 648 | return; |
| 649 | |
René Scharfe | 248f66e | 2018-03-25 12:57:50 +0200 | [diff] [blame] | 650 | strbuf_addstr(&buf, "trace: run_command:"); |
Nguyễn Thái Ngọc Duy | 090a092 | 2018-01-18 16:45:12 +0700 | [diff] [blame] | 651 | if (cp->dir) { |
| 652 | strbuf_addstr(&buf, " cd "); |
| 653 | sq_quote_buf_pretty(&buf, cp->dir); |
| 654 | strbuf_addch(&buf, ';'); |
| 655 | } |
Nguyễn Thái Ngọc Duy | c61a975 | 2018-01-18 16:45:11 +0700 | [diff] [blame] | 656 | /* |
| 657 | * The caller is responsible for initializing cp->env from |
| 658 | * cp->env_array if needed. We only check one place. |
| 659 | */ |
| 660 | if (cp->env) |
| 661 | trace_add_env(&buf, cp->env); |
Nguyễn Thái Ngọc Duy | 21dfc5e | 2018-01-18 16:45:10 +0700 | [diff] [blame] | 662 | if (cp->git_cmd) |
| 663 | strbuf_addstr(&buf, " git"); |
Nguyễn Thái Ngọc Duy | e73dd78 | 2018-01-18 16:45:09 +0700 | [diff] [blame] | 664 | sq_quote_argv_pretty(&buf, cp->argv); |
| 665 | |
| 666 | trace_printf("%s", buf.buf); |
| 667 | strbuf_release(&buf); |
| 668 | } |
| 669 | |
Shawn O. Pearce | ebcb5d1 | 2007-03-10 03:28:05 -0500 | [diff] [blame] | 670 | int start_command(struct child_process *cmd) |
Josef Weidendorfer | b1bf95b | 2005-07-31 21:17:43 +0200 | [diff] [blame] | 671 | { |
Johannes Sixt | f3b33f1 | 2007-10-19 21:47:58 +0200 | [diff] [blame] | 672 | int need_in, need_out, need_err; |
| 673 | int fdin[2], fdout[2], fderr[2]; |
Jeff King | 25043d8 | 2013-03-21 11:45:00 -0400 | [diff] [blame] | 674 | int failed_errno; |
Stephen Boyd | 939296c | 2013-01-30 18:01:05 -0800 | [diff] [blame] | 675 | char *str; |
Shawn O. Pearce | 4919bf0 | 2007-03-10 03:28:08 -0500 | [diff] [blame] | 676 | |
Jeff King | c460c0e | 2014-05-15 04:33:26 -0400 | [diff] [blame] | 677 | if (!cmd->argv) |
Jeff King | d70a9eb | 2020-07-28 20:37:20 -0400 | [diff] [blame] | 678 | cmd->argv = cmd->args.v; |
René Scharfe | 19a583d | 2014-10-19 13:13:55 +0200 | [diff] [blame] | 679 | if (!cmd->env) |
Jeff King | d70a9eb | 2020-07-28 20:37:20 -0400 | [diff] [blame] | 680 | cmd->env = cmd->env_array.v; |
Jeff King | c460c0e | 2014-05-15 04:33:26 -0400 | [diff] [blame] | 681 | |
Johannes Sixt | c20181e | 2008-02-21 23:42:56 +0100 | [diff] [blame] | 682 | /* |
| 683 | * In case of errors we must keep the promise to close FDs |
| 684 | * that have been passed in via ->in and ->out. |
| 685 | */ |
| 686 | |
Shawn O. Pearce | e4507ae | 2007-03-12 14:37:55 -0400 | [diff] [blame] | 687 | need_in = !cmd->no_stdin && cmd->in < 0; |
Shawn O. Pearce | 4919bf0 | 2007-03-10 03:28:08 -0500 | [diff] [blame] | 688 | if (need_in) { |
Johannes Sixt | c20181e | 2008-02-21 23:42:56 +0100 | [diff] [blame] | 689 | if (pipe(fdin) < 0) { |
Johannes Sixt | 0ac77ec | 2009-07-04 21:26:40 +0200 | [diff] [blame] | 690 | failed_errno = errno; |
Johannes Sixt | c20181e | 2008-02-21 23:42:56 +0100 | [diff] [blame] | 691 | if (cmd->out > 0) |
| 692 | close(cmd->out); |
Stephen Boyd | 939296c | 2013-01-30 18:01:05 -0800 | [diff] [blame] | 693 | str = "standard input"; |
Johannes Sixt | 0ac77ec | 2009-07-04 21:26:40 +0200 | [diff] [blame] | 694 | goto fail_pipe; |
Johannes Sixt | c20181e | 2008-02-21 23:42:56 +0100 | [diff] [blame] | 695 | } |
Shawn O. Pearce | 4919bf0 | 2007-03-10 03:28:08 -0500 | [diff] [blame] | 696 | cmd->in = fdin[1]; |
Shawn O. Pearce | 4919bf0 | 2007-03-10 03:28:08 -0500 | [diff] [blame] | 697 | } |
| 698 | |
Shawn O. Pearce | e4507ae | 2007-03-12 14:37:55 -0400 | [diff] [blame] | 699 | need_out = !cmd->no_stdout |
| 700 | && !cmd->stdout_to_stderr |
| 701 | && cmd->out < 0; |
Shawn O. Pearce | f4bba25 | 2007-03-12 14:37:45 -0400 | [diff] [blame] | 702 | if (need_out) { |
| 703 | if (pipe(fdout) < 0) { |
Johannes Sixt | 0ac77ec | 2009-07-04 21:26:40 +0200 | [diff] [blame] | 704 | failed_errno = errno; |
Shawn O. Pearce | f4bba25 | 2007-03-12 14:37:45 -0400 | [diff] [blame] | 705 | if (need_in) |
| 706 | close_pair(fdin); |
Johannes Sixt | c20181e | 2008-02-21 23:42:56 +0100 | [diff] [blame] | 707 | else if (cmd->in) |
| 708 | close(cmd->in); |
Stephen Boyd | 939296c | 2013-01-30 18:01:05 -0800 | [diff] [blame] | 709 | str = "standard output"; |
Johannes Sixt | 0ac77ec | 2009-07-04 21:26:40 +0200 | [diff] [blame] | 710 | goto fail_pipe; |
Shawn O. Pearce | f4bba25 | 2007-03-12 14:37:45 -0400 | [diff] [blame] | 711 | } |
| 712 | cmd->out = fdout[0]; |
Shawn O. Pearce | f4bba25 | 2007-03-12 14:37:45 -0400 | [diff] [blame] | 713 | } |
| 714 | |
Shawn O. Pearce | b73a439 | 2007-11-11 02:29:37 -0500 | [diff] [blame] | 715 | need_err = !cmd->no_stderr && cmd->err < 0; |
Johannes Sixt | f3b33f1 | 2007-10-19 21:47:58 +0200 | [diff] [blame] | 716 | if (need_err) { |
| 717 | if (pipe(fderr) < 0) { |
Johannes Sixt | 0ac77ec | 2009-07-04 21:26:40 +0200 | [diff] [blame] | 718 | failed_errno = errno; |
Johannes Sixt | f3b33f1 | 2007-10-19 21:47:58 +0200 | [diff] [blame] | 719 | if (need_in) |
| 720 | close_pair(fdin); |
Johannes Sixt | c20181e | 2008-02-21 23:42:56 +0100 | [diff] [blame] | 721 | else if (cmd->in) |
| 722 | close(cmd->in); |
Johannes Sixt | f3b33f1 | 2007-10-19 21:47:58 +0200 | [diff] [blame] | 723 | if (need_out) |
| 724 | close_pair(fdout); |
Johannes Sixt | c20181e | 2008-02-21 23:42:56 +0100 | [diff] [blame] | 725 | else if (cmd->out) |
| 726 | close(cmd->out); |
Stephen Boyd | 939296c | 2013-01-30 18:01:05 -0800 | [diff] [blame] | 727 | str = "standard error"; |
Johannes Sixt | 0ac77ec | 2009-07-04 21:26:40 +0200 | [diff] [blame] | 728 | fail_pipe: |
Stephen Boyd | 939296c | 2013-01-30 18:01:05 -0800 | [diff] [blame] | 729 | error("cannot create %s pipe for %s: %s", |
| 730 | str, cmd->argv[0], strerror(failed_errno)); |
René Scharfe | 2d71608 | 2015-10-24 14:11:27 +0200 | [diff] [blame] | 731 | child_process_clear(cmd); |
Johannes Sixt | 0ac77ec | 2009-07-04 21:26:40 +0200 | [diff] [blame] | 732 | errno = failed_errno; |
| 733 | return -1; |
Johannes Sixt | f3b33f1 | 2007-10-19 21:47:58 +0200 | [diff] [blame] | 734 | } |
| 735 | cmd->err = fderr[0]; |
| 736 | } |
| 737 | |
Jeff Hostetler | ee4512e | 2019-02-22 14:25:01 -0800 | [diff] [blame] | 738 | trace2_child_start(cmd); |
Nguyễn Thái Ngọc Duy | e73dd78 | 2018-01-18 16:45:09 +0700 | [diff] [blame] | 739 | trace_run_command(cmd); |
| 740 | |
Johannes Sixt | 13af8cb | 2011-02-04 09:41:58 +0100 | [diff] [blame] | 741 | fflush(NULL); |
Johannes Schindelin | 8852f5d | 2008-07-07 14:41:34 +0100 | [diff] [blame] | 742 | |
Jonathan Nieder | 380395d | 2013-05-02 20:26:08 +0100 | [diff] [blame] | 743 | #ifndef GIT_WINDOWS_NATIVE |
Johannes Sixt | 2b541bf | 2010-01-10 14:11:22 +0100 | [diff] [blame] | 744 | { |
| 745 | int notify_pipe[2]; |
Brandon Williams | db015a2 | 2017-04-19 16:13:23 -0700 | [diff] [blame] | 746 | int null_fd = -1; |
Brandon Williams | ae25394 | 2017-04-19 16:13:22 -0700 | [diff] [blame] | 747 | char **childenv; |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 748 | struct strvec argv = STRVEC_INIT; |
Brandon Williams | 79319b1 | 2017-04-19 16:13:24 -0700 | [diff] [blame] | 749 | struct child_err cerr; |
Eric Wong | 45afb1c | 2017-04-19 16:13:27 -0700 | [diff] [blame] | 750 | struct atfork_state as; |
Brandon Williams | 3967e25 | 2017-04-19 16:13:19 -0700 | [diff] [blame] | 751 | |
Jeff King | 321fd82 | 2018-10-24 03:38:00 -0400 | [diff] [blame] | 752 | if (prepare_cmd(&argv, cmd) < 0) { |
| 753 | failed_errno = errno; |
| 754 | cmd->pid = -1; |
Junio C Hamano | e5a329a | 2018-12-11 14:46:07 +0900 | [diff] [blame] | 755 | if (!cmd->silent_exec_failure) |
| 756 | error_errno("cannot run %s", cmd->argv[0]); |
Jeff King | 321fd82 | 2018-10-24 03:38:00 -0400 | [diff] [blame] | 757 | goto end_of_spawn; |
| 758 | } |
| 759 | |
Johannes Sixt | 2b541bf | 2010-01-10 14:11:22 +0100 | [diff] [blame] | 760 | if (pipe(notify_pipe)) |
| 761 | notify_pipe[0] = notify_pipe[1] = -1; |
| 762 | |
Brandon Williams | db015a2 | 2017-04-19 16:13:23 -0700 | [diff] [blame] | 763 | if (cmd->no_stdin || cmd->no_stdout || cmd->no_stderr) { |
René Scharfe | 66e905b | 2021-08-25 22:16:46 +0200 | [diff] [blame] | 764 | null_fd = xopen("/dev/null", O_RDWR | O_CLOEXEC); |
Brandon Williams | db015a2 | 2017-04-19 16:13:23 -0700 | [diff] [blame] | 765 | set_cloexec(null_fd); |
| 766 | } |
| 767 | |
Brandon Williams | ae25394 | 2017-04-19 16:13:22 -0700 | [diff] [blame] | 768 | childenv = prep_childenv(cmd->env); |
Eric Wong | 45afb1c | 2017-04-19 16:13:27 -0700 | [diff] [blame] | 769 | atfork_prepare(&as); |
Brandon Williams | 3967e25 | 2017-04-19 16:13:19 -0700 | [diff] [blame] | 770 | |
Brandon Williams | e503cd6 | 2017-04-19 16:13:26 -0700 | [diff] [blame] | 771 | /* |
| 772 | * NOTE: In order to prevent deadlocking when using threads special |
| 773 | * care should be taken with the function calls made in between the |
| 774 | * fork() and exec() calls. No calls should be made to functions which |
| 775 | * require acquiring a lock (e.g. malloc) as the lock could have been |
| 776 | * held by another thread at the time of forking, causing the lock to |
| 777 | * never be released in the child process. This means only |
| 778 | * Async-Signal-Safe functions are permitted in the child. |
| 779 | */ |
Shawn O. Pearce | ebcb5d1 | 2007-03-10 03:28:05 -0500 | [diff] [blame] | 780 | cmd->pid = fork(); |
Jeff King | 25043d8 | 2013-03-21 11:45:00 -0400 | [diff] [blame] | 781 | failed_errno = errno; |
Shawn O. Pearce | ebcb5d1 | 2007-03-10 03:28:05 -0500 | [diff] [blame] | 782 | if (!cmd->pid) { |
Eric Wong | 45afb1c | 2017-04-19 16:13:27 -0700 | [diff] [blame] | 783 | int sig; |
Johannes Sixt | a5487dd | 2010-01-10 14:07:52 +0100 | [diff] [blame] | 784 | /* |
Brandon Williams | 79319b1 | 2017-04-19 16:13:24 -0700 | [diff] [blame] | 785 | * Ensure the default die/error/warn routines do not get |
| 786 | * called, they can take stdio locks and malloc. |
Johannes Sixt | a5487dd | 2010-01-10 14:07:52 +0100 | [diff] [blame] | 787 | */ |
Brandon Williams | 79319b1 | 2017-04-19 16:13:24 -0700 | [diff] [blame] | 788 | set_die_routine(child_die_fn); |
| 789 | set_error_routine(child_error_fn); |
| 790 | set_warn_routine(child_warn_fn); |
Johannes Sixt | a5487dd | 2010-01-10 14:07:52 +0100 | [diff] [blame] | 791 | |
Johannes Sixt | 2b541bf | 2010-01-10 14:11:22 +0100 | [diff] [blame] | 792 | close(notify_pipe[0]); |
| 793 | set_cloexec(notify_pipe[1]); |
| 794 | child_notifier = notify_pipe[1]; |
Johannes Sixt | 2b541bf | 2010-01-10 14:11:22 +0100 | [diff] [blame] | 795 | |
Shawn O. Pearce | e4507ae | 2007-03-12 14:37:55 -0400 | [diff] [blame] | 796 | if (cmd->no_stdin) |
Brandon Williams | 53fa675 | 2017-04-19 16:13:25 -0700 | [diff] [blame] | 797 | child_dup2(null_fd, 0); |
Shawn O. Pearce | e4507ae | 2007-03-12 14:37:55 -0400 | [diff] [blame] | 798 | else if (need_in) { |
Brandon Williams | 53fa675 | 2017-04-19 16:13:25 -0700 | [diff] [blame] | 799 | child_dup2(fdin[0], 0); |
| 800 | child_close_pair(fdin); |
Shawn O. Pearce | 4919bf0 | 2007-03-10 03:28:08 -0500 | [diff] [blame] | 801 | } else if (cmd->in) { |
Brandon Williams | 53fa675 | 2017-04-19 16:13:25 -0700 | [diff] [blame] | 802 | child_dup2(cmd->in, 0); |
| 803 | child_close(cmd->in); |
Shawn O. Pearce | 95d3c4f | 2006-12-30 21:55:22 -0500 | [diff] [blame] | 804 | } |
Shawn O. Pearce | 4919bf0 | 2007-03-10 03:28:08 -0500 | [diff] [blame] | 805 | |
Christian Couder | ce2cf27 | 2008-03-05 08:35:16 +0100 | [diff] [blame] | 806 | if (cmd->no_stderr) |
Brandon Williams | 53fa675 | 2017-04-19 16:13:25 -0700 | [diff] [blame] | 807 | child_dup2(null_fd, 2); |
Christian Couder | ce2cf27 | 2008-03-05 08:35:16 +0100 | [diff] [blame] | 808 | else if (need_err) { |
Brandon Williams | 53fa675 | 2017-04-19 16:13:25 -0700 | [diff] [blame] | 809 | child_dup2(fderr[1], 2); |
| 810 | child_close_pair(fderr); |
Shawn O. Pearce | 4f41b61 | 2010-02-05 12:57:37 -0800 | [diff] [blame] | 811 | } else if (cmd->err > 1) { |
Brandon Williams | 53fa675 | 2017-04-19 16:13:25 -0700 | [diff] [blame] | 812 | child_dup2(cmd->err, 2); |
| 813 | child_close(cmd->err); |
Christian Couder | ce2cf27 | 2008-03-05 08:35:16 +0100 | [diff] [blame] | 814 | } |
| 815 | |
Shawn O. Pearce | e4507ae | 2007-03-12 14:37:55 -0400 | [diff] [blame] | 816 | if (cmd->no_stdout) |
Brandon Williams | 53fa675 | 2017-04-19 16:13:25 -0700 | [diff] [blame] | 817 | child_dup2(null_fd, 1); |
Shawn O. Pearce | e4507ae | 2007-03-12 14:37:55 -0400 | [diff] [blame] | 818 | else if (cmd->stdout_to_stderr) |
Brandon Williams | 53fa675 | 2017-04-19 16:13:25 -0700 | [diff] [blame] | 819 | child_dup2(2, 1); |
Shawn O. Pearce | f4bba25 | 2007-03-12 14:37:45 -0400 | [diff] [blame] | 820 | else if (need_out) { |
Brandon Williams | 53fa675 | 2017-04-19 16:13:25 -0700 | [diff] [blame] | 821 | child_dup2(fdout[1], 1); |
| 822 | child_close_pair(fdout); |
Shawn O. Pearce | f4bba25 | 2007-03-12 14:37:45 -0400 | [diff] [blame] | 823 | } else if (cmd->out > 1) { |
Brandon Williams | 53fa675 | 2017-04-19 16:13:25 -0700 | [diff] [blame] | 824 | child_dup2(cmd->out, 1); |
| 825 | child_close(cmd->out); |
Shawn O. Pearce | f4bba25 | 2007-03-12 14:37:45 -0400 | [diff] [blame] | 826 | } |
| 827 | |
Alex Riesen | 1568fea | 2007-05-22 23:48:23 +0200 | [diff] [blame] | 828 | if (cmd->dir && chdir(cmd->dir)) |
Brandon Williams | 79319b1 | 2017-04-19 16:13:24 -0700 | [diff] [blame] | 829 | child_die(CHILD_ERR_CHDIR); |
Brandon Williams | 3967e25 | 2017-04-19 16:13:19 -0700 | [diff] [blame] | 830 | |
Brandon Williams | e3a4344 | 2017-04-19 16:13:20 -0700 | [diff] [blame] | 831 | /* |
Eric Wong | 45afb1c | 2017-04-19 16:13:27 -0700 | [diff] [blame] | 832 | * restore default signal handlers here, in case |
| 833 | * we catch a signal right before execve below |
| 834 | */ |
| 835 | for (sig = 1; sig < NSIG; sig++) { |
| 836 | /* ignored signals get reset to SIG_DFL on execve */ |
| 837 | if (signal(sig, SIG_DFL) == SIG_IGN) |
| 838 | signal(sig, SIG_IGN); |
| 839 | } |
| 840 | |
| 841 | if (sigprocmask(SIG_SETMASK, &as.old, NULL) != 0) |
| 842 | child_die(CHILD_ERR_SIGPROCMASK); |
| 843 | |
| 844 | /* |
Brandon Williams | e3a4344 | 2017-04-19 16:13:20 -0700 | [diff] [blame] | 845 | * Attempt to exec using the command and arguments starting at |
| 846 | * argv.argv[1]. argv.argv[0] contains SHELL_PATH which will |
| 847 | * be used in the event exec failed with ENOEXEC at which point |
| 848 | * we will try to interpret the command using 'sh'. |
| 849 | */ |
Jeff King | d70a9eb | 2020-07-28 20:37:20 -0400 | [diff] [blame] | 850 | execve(argv.v[1], (char *const *) argv.v + 1, |
Brandon Williams | ae25394 | 2017-04-19 16:13:22 -0700 | [diff] [blame] | 851 | (char *const *) childenv); |
Brandon Williams | e3a4344 | 2017-04-19 16:13:20 -0700 | [diff] [blame] | 852 | if (errno == ENOEXEC) |
Jeff King | d70a9eb | 2020-07-28 20:37:20 -0400 | [diff] [blame] | 853 | execve(argv.v[0], (char *const *) argv.v, |
Brandon Williams | ae25394 | 2017-04-19 16:13:22 -0700 | [diff] [blame] | 854 | (char *const *) childenv); |
Brandon Williams | 3967e25 | 2017-04-19 16:13:19 -0700 | [diff] [blame] | 855 | |
Clemens Buchacher | fc1b56f | 2011-08-01 19:59:21 +0200 | [diff] [blame] | 856 | if (errno == ENOENT) { |
Brandon Williams | 79319b1 | 2017-04-19 16:13:24 -0700 | [diff] [blame] | 857 | if (cmd->silent_exec_failure) |
| 858 | child_die(CHILD_ERR_SILENT); |
| 859 | child_die(CHILD_ERR_ENOENT); |
Clemens Buchacher | fc1b56f | 2011-08-01 19:59:21 +0200 | [diff] [blame] | 860 | } else { |
Brandon Williams | 79319b1 | 2017-04-19 16:13:24 -0700 | [diff] [blame] | 861 | child_die(CHILD_ERR_ERRNO); |
Clemens Buchacher | fc1b56f | 2011-08-01 19:59:21 +0200 | [diff] [blame] | 862 | } |
Josef Weidendorfer | b1bf95b | 2005-07-31 21:17:43 +0200 | [diff] [blame] | 863 | } |
Eric Wong | 45afb1c | 2017-04-19 16:13:27 -0700 | [diff] [blame] | 864 | atfork_parent(&as); |
Johannes Sixt | 0ac77ec | 2009-07-04 21:26:40 +0200 | [diff] [blame] | 865 | if (cmd->pid < 0) |
Nguyễn Thái Ngọc Duy | fbcb0e0 | 2016-05-08 16:47:53 +0700 | [diff] [blame] | 866 | error_errno("cannot fork() for %s", cmd->argv[0]); |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 867 | else if (cmd->clean_on_exit) |
Lars Schneider | ac2fbaa | 2016-10-16 16:20:28 -0700 | [diff] [blame] | 868 | mark_child_for_cleanup(cmd->pid, cmd); |
Johannes Sixt | 2b541bf | 2010-01-10 14:11:22 +0100 | [diff] [blame] | 869 | |
| 870 | /* |
Brandon Williams | 3967e25 | 2017-04-19 16:13:19 -0700 | [diff] [blame] | 871 | * Wait for child's exec. If the exec succeeds (or if fork() |
Johannes Sixt | 2b541bf | 2010-01-10 14:11:22 +0100 | [diff] [blame] | 872 | * failed), EOF is seen immediately by the parent. Otherwise, the |
Brandon Williams | 79319b1 | 2017-04-19 16:13:24 -0700 | [diff] [blame] | 873 | * child process sends a child_err struct. |
Johannes Sixt | 2b541bf | 2010-01-10 14:11:22 +0100 | [diff] [blame] | 874 | * Note that use of this infrastructure is completely advisory, |
| 875 | * therefore, we keep error checks minimal. |
| 876 | */ |
| 877 | close(notify_pipe[1]); |
Brandon Williams | 79319b1 | 2017-04-19 16:13:24 -0700 | [diff] [blame] | 878 | if (xread(notify_pipe[0], &cerr, sizeof(cerr)) == sizeof(cerr)) { |
Johannes Sixt | 2b541bf | 2010-01-10 14:11:22 +0100 | [diff] [blame] | 879 | /* |
Brandon Williams | 3967e25 | 2017-04-19 16:13:19 -0700 | [diff] [blame] | 880 | * At this point we know that fork() succeeded, but exec() |
Johannes Sixt | 2b541bf | 2010-01-10 14:11:22 +0100 | [diff] [blame] | 881 | * failed. Errors have been reported to our stderr. |
| 882 | */ |
Takashi Iwai | 507d780 | 2015-09-04 11:35:57 +0200 | [diff] [blame] | 883 | wait_or_whine(cmd->pid, cmd->argv[0], 0); |
Brandon Williams | 79319b1 | 2017-04-19 16:13:24 -0700 | [diff] [blame] | 884 | child_err_spew(cmd, &cerr); |
Johannes Sixt | 2b541bf | 2010-01-10 14:11:22 +0100 | [diff] [blame] | 885 | failed_errno = errno; |
| 886 | cmd->pid = -1; |
| 887 | } |
| 888 | close(notify_pipe[0]); |
Brandon Williams | 3967e25 | 2017-04-19 16:13:19 -0700 | [diff] [blame] | 889 | |
Brandon Williams | db015a2 | 2017-04-19 16:13:23 -0700 | [diff] [blame] | 890 | if (null_fd >= 0) |
| 891 | close(null_fd); |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 892 | strvec_clear(&argv); |
Brandon Williams | ae25394 | 2017-04-19 16:13:22 -0700 | [diff] [blame] | 893 | free(childenv); |
Johannes Sixt | 2b541bf | 2010-01-10 14:11:22 +0100 | [diff] [blame] | 894 | } |
Jeff King | 321fd82 | 2018-10-24 03:38:00 -0400 | [diff] [blame] | 895 | end_of_spawn: |
| 896 | |
Johannes Sixt | ba26f29 | 2007-12-07 22:08:59 +0100 | [diff] [blame] | 897 | #else |
Frank Li | 0d30ad7 | 2009-09-16 10:20:17 +0200 | [diff] [blame] | 898 | { |
Johannes Sixt | 75301f9 | 2010-01-15 21:12:18 +0100 | [diff] [blame] | 899 | int fhin = 0, fhout = 1, fherr = 2; |
Steffen Prohaska | 108ac31 | 2008-07-28 07:50:28 +0200 | [diff] [blame] | 900 | const char **sargv = cmd->argv; |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 901 | struct strvec nargv = STRVEC_INIT; |
Johannes Sixt | ba26f29 | 2007-12-07 22:08:59 +0100 | [diff] [blame] | 902 | |
Johannes Sixt | 75301f9 | 2010-01-15 21:12:18 +0100 | [diff] [blame] | 903 | if (cmd->no_stdin) |
| 904 | fhin = open("/dev/null", O_RDWR); |
| 905 | else if (need_in) |
| 906 | fhin = dup(fdin[0]); |
| 907 | else if (cmd->in) |
| 908 | fhin = dup(cmd->in); |
Johannes Sixt | ba26f29 | 2007-12-07 22:08:59 +0100 | [diff] [blame] | 909 | |
Johannes Sixt | 75301f9 | 2010-01-15 21:12:18 +0100 | [diff] [blame] | 910 | if (cmd->no_stderr) |
| 911 | fherr = open("/dev/null", O_RDWR); |
| 912 | else if (need_err) |
| 913 | fherr = dup(fderr[1]); |
Junio C Hamano | 76d44c8 | 2010-02-05 21:08:53 -0800 | [diff] [blame] | 914 | else if (cmd->err > 2) |
| 915 | fherr = dup(cmd->err); |
Johannes Sixt | ba26f29 | 2007-12-07 22:08:59 +0100 | [diff] [blame] | 916 | |
Johannes Sixt | 75301f9 | 2010-01-15 21:12:18 +0100 | [diff] [blame] | 917 | if (cmd->no_stdout) |
| 918 | fhout = open("/dev/null", O_RDWR); |
| 919 | else if (cmd->stdout_to_stderr) |
| 920 | fhout = dup(fherr); |
| 921 | else if (need_out) |
| 922 | fhout = dup(fdout[1]); |
| 923 | else if (cmd->out > 1) |
| 924 | fhout = dup(cmd->out); |
Johannes Sixt | ba26f29 | 2007-12-07 22:08:59 +0100 | [diff] [blame] | 925 | |
Felipe Contreras | 5a50085 | 2013-10-31 03:25:45 -0600 | [diff] [blame] | 926 | if (cmd->git_cmd) |
Jeff King | 20574f5 | 2016-02-22 17:44:39 -0500 | [diff] [blame] | 927 | cmd->argv = prepare_git_cmd(&nargv, cmd->argv); |
Felipe Contreras | 5a50085 | 2013-10-31 03:25:45 -0600 | [diff] [blame] | 928 | else if (cmd->use_shell) |
Jeff King | 20574f5 | 2016-02-22 17:44:39 -0500 | [diff] [blame] | 929 | cmd->argv = prepare_shell_cmd(&nargv, cmd->argv); |
Johannes Sixt | ba26f29 | 2007-12-07 22:08:59 +0100 | [diff] [blame] | 930 | |
Karsten Blees | 77734da | 2014-07-17 17:38:01 +0200 | [diff] [blame] | 931 | cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, (char**) cmd->env, |
| 932 | cmd->dir, fhin, fhout, fherr); |
Johannes Sixt | 0ac77ec | 2009-07-04 21:26:40 +0200 | [diff] [blame] | 933 | failed_errno = errno; |
Johannes Sixt | c024beb | 2009-07-04 21:26:42 +0200 | [diff] [blame] | 934 | if (cmd->pid < 0 && (!cmd->silent_exec_failure || errno != ENOENT)) |
Nguyễn Thái Ngọc Duy | fbcb0e0 | 2016-05-08 16:47:53 +0700 | [diff] [blame] | 935 | error_errno("cannot spawn %s", cmd->argv[0]); |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 936 | if (cmd->clean_on_exit && cmd->pid >= 0) |
Lars Schneider | ac2fbaa | 2016-10-16 16:20:28 -0700 | [diff] [blame] | 937 | mark_child_for_cleanup(cmd->pid, cmd); |
Johannes Sixt | ba26f29 | 2007-12-07 22:08:59 +0100 | [diff] [blame] | 938 | |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 939 | strvec_clear(&nargv); |
Steffen Prohaska | 108ac31 | 2008-07-28 07:50:28 +0200 | [diff] [blame] | 940 | cmd->argv = sargv; |
Johannes Sixt | 75301f9 | 2010-01-15 21:12:18 +0100 | [diff] [blame] | 941 | if (fhin != 0) |
| 942 | close(fhin); |
| 943 | if (fhout != 1) |
| 944 | close(fhout); |
| 945 | if (fherr != 2) |
| 946 | close(fherr); |
Frank Li | 0d30ad7 | 2009-09-16 10:20:17 +0200 | [diff] [blame] | 947 | } |
Johannes Sixt | ba26f29 | 2007-12-07 22:08:59 +0100 | [diff] [blame] | 948 | #endif |
| 949 | |
| 950 | if (cmd->pid < 0) { |
Jeff Hostetler | ee4512e | 2019-02-22 14:25:01 -0800 | [diff] [blame] | 951 | trace2_child_exit(cmd, -1); |
| 952 | |
Johannes Sixt | ba26f29 | 2007-12-07 22:08:59 +0100 | [diff] [blame] | 953 | if (need_in) |
| 954 | close_pair(fdin); |
| 955 | else if (cmd->in) |
| 956 | close(cmd->in); |
| 957 | if (need_out) |
| 958 | close_pair(fdout); |
| 959 | else if (cmd->out) |
| 960 | close(cmd->out); |
| 961 | if (need_err) |
| 962 | close_pair(fderr); |
bert Dvornik | fc012c2 | 2010-05-20 20:57:52 +0200 | [diff] [blame] | 963 | else if (cmd->err) |
| 964 | close(cmd->err); |
René Scharfe | 2d71608 | 2015-10-24 14:11:27 +0200 | [diff] [blame] | 965 | child_process_clear(cmd); |
Johannes Sixt | 0ac77ec | 2009-07-04 21:26:40 +0200 | [diff] [blame] | 966 | errno = failed_errno; |
| 967 | return -1; |
Johannes Sixt | ba26f29 | 2007-12-07 22:08:59 +0100 | [diff] [blame] | 968 | } |
Shawn O. Pearce | 4919bf0 | 2007-03-10 03:28:08 -0500 | [diff] [blame] | 969 | |
| 970 | if (need_in) |
| 971 | close(fdin[0]); |
| 972 | else if (cmd->in) |
| 973 | close(cmd->in); |
| 974 | |
Shawn O. Pearce | f4bba25 | 2007-03-12 14:37:45 -0400 | [diff] [blame] | 975 | if (need_out) |
| 976 | close(fdout[1]); |
Johannes Sixt | c20181e | 2008-02-21 23:42:56 +0100 | [diff] [blame] | 977 | else if (cmd->out) |
Shawn O. Pearce | f4bba25 | 2007-03-12 14:37:45 -0400 | [diff] [blame] | 978 | close(cmd->out); |
| 979 | |
Johannes Sixt | f3b33f1 | 2007-10-19 21:47:58 +0200 | [diff] [blame] | 980 | if (need_err) |
| 981 | close(fderr[1]); |
Shawn O. Pearce | 4f41b61 | 2010-02-05 12:57:37 -0800 | [diff] [blame] | 982 | else if (cmd->err) |
| 983 | close(cmd->err); |
Johannes Sixt | f3b33f1 | 2007-10-19 21:47:58 +0200 | [diff] [blame] | 984 | |
Shawn O. Pearce | ebcb5d1 | 2007-03-10 03:28:05 -0500 | [diff] [blame] | 985 | return 0; |
| 986 | } |
| 987 | |
Johannes Sixt | 2d22c20 | 2007-10-19 21:48:00 +0200 | [diff] [blame] | 988 | int finish_command(struct child_process *cmd) |
| 989 | { |
Takashi Iwai | 507d780 | 2015-09-04 11:35:57 +0200 | [diff] [blame] | 990 | int ret = wait_or_whine(cmd->pid, cmd->argv[0], 0); |
Jeff Hostetler | ee4512e | 2019-02-22 14:25:01 -0800 | [diff] [blame] | 991 | trace2_child_exit(cmd, ret); |
René Scharfe | 2d71608 | 2015-10-24 14:11:27 +0200 | [diff] [blame] | 992 | child_process_clear(cmd); |
Johannes Schindelin | 0d58fef | 2021-02-02 22:09:52 +0100 | [diff] [blame] | 993 | invalidate_lstat_cache(); |
Jeff King | c460c0e | 2014-05-15 04:33:26 -0400 | [diff] [blame] | 994 | return ret; |
Johannes Sixt | 2d22c20 | 2007-10-19 21:48:00 +0200 | [diff] [blame] | 995 | } |
| 996 | |
Takashi Iwai | 507d780 | 2015-09-04 11:35:57 +0200 | [diff] [blame] | 997 | int finish_command_in_signal(struct child_process *cmd) |
| 998 | { |
Jeff Hostetler | ee4512e | 2019-02-22 14:25:01 -0800 | [diff] [blame] | 999 | int ret = wait_or_whine(cmd->pid, cmd->argv[0], 1); |
| 1000 | trace2_child_exit(cmd, ret); |
| 1001 | return ret; |
Takashi Iwai | 507d780 | 2015-09-04 11:35:57 +0200 | [diff] [blame] | 1002 | } |
| 1003 | |
| 1004 | |
Shawn O. Pearce | ebcb5d1 | 2007-03-10 03:28:05 -0500 | [diff] [blame] | 1005 | int run_command(struct child_process *cmd) |
| 1006 | { |
Jeff King | c29b396 | 2015-03-22 23:54:05 -0400 | [diff] [blame] | 1007 | int code; |
| 1008 | |
| 1009 | if (cmd->out < 0 || cmd->err < 0) |
Johannes Schindelin | 033abf9 | 2018-05-02 11:38:39 +0200 | [diff] [blame] | 1010 | BUG("run_command with a pipe can cause deadlock"); |
Jeff King | c29b396 | 2015-03-22 23:54:05 -0400 | [diff] [blame] | 1011 | |
| 1012 | code = start_command(cmd); |
Shawn O. Pearce | ebcb5d1 | 2007-03-10 03:28:05 -0500 | [diff] [blame] | 1013 | if (code) |
| 1014 | return code; |
| 1015 | return finish_command(cmd); |
| 1016 | } |
| 1017 | |
Shawn O. Pearce | f100089 | 2007-03-10 03:28:00 -0500 | [diff] [blame] | 1018 | int run_command_v_opt(const char **argv, int opt) |
| 1019 | { |
René Scharfe | 41e9bad | 2014-08-19 21:11:00 +0200 | [diff] [blame] | 1020 | return run_command_v_opt_cd_env(argv, opt, NULL, NULL); |
Alex Riesen | 1568fea | 2007-05-22 23:48:23 +0200 | [diff] [blame] | 1021 | } |
| 1022 | |
Jeff Hostetler | ee4512e | 2019-02-22 14:25:01 -0800 | [diff] [blame] | 1023 | int run_command_v_opt_tr2(const char **argv, int opt, const char *tr2_class) |
| 1024 | { |
| 1025 | return run_command_v_opt_cd_env_tr2(argv, opt, NULL, NULL, tr2_class); |
| 1026 | } |
| 1027 | |
Alex Riesen | ee49314 | 2007-05-22 23:48:47 +0200 | [diff] [blame] | 1028 | int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const char *const *env) |
| 1029 | { |
Jeff Hostetler | ee4512e | 2019-02-22 14:25:01 -0800 | [diff] [blame] | 1030 | return run_command_v_opt_cd_env_tr2(argv, opt, dir, env, NULL); |
| 1031 | } |
| 1032 | |
| 1033 | int run_command_v_opt_cd_env_tr2(const char **argv, int opt, const char *dir, |
| 1034 | const char *const *env, const char *tr2_class) |
| 1035 | { |
René Scharfe | 1f87293 | 2014-08-19 21:11:43 +0200 | [diff] [blame] | 1036 | struct child_process cmd = CHILD_PROCESS_INIT; |
| 1037 | cmd.argv = argv; |
| 1038 | cmd.no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0; |
| 1039 | cmd.git_cmd = opt & RUN_GIT_CMD ? 1 : 0; |
| 1040 | cmd.stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0; |
| 1041 | cmd.silent_exec_failure = opt & RUN_SILENT_EXEC_FAILURE ? 1 : 0; |
| 1042 | cmd.use_shell = opt & RUN_USING_SHELL ? 1 : 0; |
| 1043 | cmd.clean_on_exit = opt & RUN_CLEAN_ON_EXIT ? 1 : 0; |
Trygve Aaberge | e662df7 | 2020-07-07 14:17:14 +0200 | [diff] [blame] | 1044 | cmd.wait_after_clean = opt & RUN_WAIT_AFTER_CLEAN ? 1 : 0; |
Alex Riesen | ee49314 | 2007-05-22 23:48:47 +0200 | [diff] [blame] | 1045 | cmd.dir = dir; |
| 1046 | cmd.env = env; |
Jeff Hostetler | ee4512e | 2019-02-22 14:25:01 -0800 | [diff] [blame] | 1047 | cmd.trace2_child_class = tr2_class; |
Alex Riesen | ee49314 | 2007-05-22 23:48:47 +0200 | [diff] [blame] | 1048 | return run_command(&cmd); |
| 1049 | } |
Johannes Sixt | 2d22c20 | 2007-10-19 21:48:00 +0200 | [diff] [blame] | 1050 | |
Johannes Sixt | f6b6098 | 2010-03-09 21:00:36 +0100 | [diff] [blame] | 1051 | #ifndef NO_PTHREADS |
Johannes Sixt | 0ea1c89 | 2010-03-06 16:40:43 +0100 | [diff] [blame] | 1052 | static pthread_t main_thread; |
| 1053 | static int main_thread_set; |
| 1054 | static pthread_key_t async_key; |
Jeff King | 1ece66b | 2013-04-16 15:50:07 -0400 | [diff] [blame] | 1055 | static pthread_key_t async_die_counter; |
Johannes Sixt | 0ea1c89 | 2010-03-06 16:40:43 +0100 | [diff] [blame] | 1056 | |
Johannes Sixt | 200a76b | 2010-03-06 16:40:42 +0100 | [diff] [blame] | 1057 | static void *run_thread(void *data) |
Johannes Sixt | 618ebe9 | 2007-12-08 22:19:14 +0100 | [diff] [blame] | 1058 | { |
| 1059 | struct async *async = data; |
Johannes Sixt | f6b6098 | 2010-03-09 21:00:36 +0100 | [diff] [blame] | 1060 | intptr_t ret; |
Johannes Sixt | 0ea1c89 | 2010-03-06 16:40:43 +0100 | [diff] [blame] | 1061 | |
Jeff King | c792d7b | 2016-04-19 18:49:41 -0400 | [diff] [blame] | 1062 | if (async->isolate_sigpipe) { |
| 1063 | sigset_t mask; |
| 1064 | sigemptyset(&mask); |
| 1065 | sigaddset(&mask, SIGPIPE); |
| 1066 | if (pthread_sigmask(SIG_BLOCK, &mask, NULL) < 0) { |
| 1067 | ret = error("unable to block SIGPIPE in async thread"); |
| 1068 | return (void *)ret; |
| 1069 | } |
| 1070 | } |
| 1071 | |
Johannes Sixt | 0ea1c89 | 2010-03-06 16:40:43 +0100 | [diff] [blame] | 1072 | pthread_setspecific(async_key, async); |
Johannes Sixt | f6b6098 | 2010-03-09 21:00:36 +0100 | [diff] [blame] | 1073 | ret = async->proc(async->proc_in, async->proc_out, async->data); |
Johannes Sixt | 200a76b | 2010-03-06 16:40:42 +0100 | [diff] [blame] | 1074 | return (void *)ret; |
Johannes Sixt | 618ebe9 | 2007-12-08 22:19:14 +0100 | [diff] [blame] | 1075 | } |
Johannes Sixt | 0ea1c89 | 2010-03-06 16:40:43 +0100 | [diff] [blame] | 1076 | |
| 1077 | static NORETURN void die_async(const char *err, va_list params) |
| 1078 | { |
| 1079 | vreportf("fatal: ", err, params); |
| 1080 | |
Jeff King | 661a8cf | 2015-09-01 16:22:43 -0400 | [diff] [blame] | 1081 | if (in_async()) { |
Johannes Sixt | 0ea1c89 | 2010-03-06 16:40:43 +0100 | [diff] [blame] | 1082 | struct async *async = pthread_getspecific(async_key); |
| 1083 | if (async->proc_in >= 0) |
| 1084 | close(async->proc_in); |
| 1085 | if (async->proc_out >= 0) |
| 1086 | close(async->proc_out); |
| 1087 | pthread_exit((void *)128); |
| 1088 | } |
| 1089 | |
| 1090 | exit(128); |
Johannes Sixt | 618ebe9 | 2007-12-08 22:19:14 +0100 | [diff] [blame] | 1091 | } |
Jeff King | 1ece66b | 2013-04-16 15:50:07 -0400 | [diff] [blame] | 1092 | |
| 1093 | static int async_die_is_recursing(void) |
| 1094 | { |
| 1095 | void *ret = pthread_getspecific(async_die_counter); |
| 1096 | pthread_setspecific(async_die_counter, (void *)1); |
| 1097 | return ret != NULL; |
| 1098 | } |
| 1099 | |
Jeff King | 661a8cf | 2015-09-01 16:22:43 -0400 | [diff] [blame] | 1100 | int in_async(void) |
| 1101 | { |
| 1102 | if (!main_thread_set) |
| 1103 | return 0; /* no asyncs started yet */ |
| 1104 | return !pthread_equal(main_thread, pthread_self()); |
| 1105 | } |
| 1106 | |
Lars Schneider | b992fe1 | 2016-10-16 16:20:27 -0700 | [diff] [blame] | 1107 | static void NORETURN async_exit(int code) |
Jeff King | 9658846 | 2016-02-24 02:40:16 -0500 | [diff] [blame] | 1108 | { |
| 1109 | pthread_exit((void *)(intptr_t)code); |
| 1110 | } |
| 1111 | |
Etienne Buira | 0f4b6db | 2014-10-18 14:31:15 +0200 | [diff] [blame] | 1112 | #else |
| 1113 | |
| 1114 | static struct { |
| 1115 | void (**handlers)(void); |
| 1116 | size_t nr; |
| 1117 | size_t alloc; |
| 1118 | } git_atexit_hdlrs; |
| 1119 | |
| 1120 | static int git_atexit_installed; |
| 1121 | |
René Scharfe | 6066a7e | 2014-11-10 22:17:00 +0100 | [diff] [blame] | 1122 | static void git_atexit_dispatch(void) |
Etienne Buira | 0f4b6db | 2014-10-18 14:31:15 +0200 | [diff] [blame] | 1123 | { |
| 1124 | size_t i; |
| 1125 | |
| 1126 | for (i=git_atexit_hdlrs.nr ; i ; i--) |
| 1127 | git_atexit_hdlrs.handlers[i-1](); |
| 1128 | } |
| 1129 | |
René Scharfe | 6066a7e | 2014-11-10 22:17:00 +0100 | [diff] [blame] | 1130 | static void git_atexit_clear(void) |
Etienne Buira | 0f4b6db | 2014-10-18 14:31:15 +0200 | [diff] [blame] | 1131 | { |
| 1132 | free(git_atexit_hdlrs.handlers); |
| 1133 | memset(&git_atexit_hdlrs, 0, sizeof(git_atexit_hdlrs)); |
| 1134 | git_atexit_installed = 0; |
| 1135 | } |
| 1136 | |
| 1137 | #undef atexit |
| 1138 | int git_atexit(void (*handler)(void)) |
| 1139 | { |
| 1140 | ALLOC_GROW(git_atexit_hdlrs.handlers, git_atexit_hdlrs.nr + 1, git_atexit_hdlrs.alloc); |
| 1141 | git_atexit_hdlrs.handlers[git_atexit_hdlrs.nr++] = handler; |
| 1142 | if (!git_atexit_installed) { |
| 1143 | if (atexit(&git_atexit_dispatch)) |
| 1144 | return -1; |
| 1145 | git_atexit_installed = 1; |
| 1146 | } |
| 1147 | return 0; |
| 1148 | } |
| 1149 | #define atexit git_atexit |
| 1150 | |
Jeff King | 661a8cf | 2015-09-01 16:22:43 -0400 | [diff] [blame] | 1151 | static int process_is_async; |
| 1152 | int in_async(void) |
| 1153 | { |
| 1154 | return process_is_async; |
| 1155 | } |
| 1156 | |
Lars Schneider | b992fe1 | 2016-10-16 16:20:27 -0700 | [diff] [blame] | 1157 | static void NORETURN async_exit(int code) |
Jeff King | 9658846 | 2016-02-24 02:40:16 -0500 | [diff] [blame] | 1158 | { |
| 1159 | exit(code); |
| 1160 | } |
| 1161 | |
Johannes Sixt | 618ebe9 | 2007-12-08 22:19:14 +0100 | [diff] [blame] | 1162 | #endif |
| 1163 | |
Lars Schneider | b992fe1 | 2016-10-16 16:20:27 -0700 | [diff] [blame] | 1164 | void check_pipe(int err) |
| 1165 | { |
| 1166 | if (err == EPIPE) { |
| 1167 | if (in_async()) |
| 1168 | async_exit(141); |
| 1169 | |
| 1170 | signal(SIGPIPE, SIG_DFL); |
| 1171 | raise(SIGPIPE); |
| 1172 | /* Should never happen, but just in case... */ |
| 1173 | exit(141); |
| 1174 | } |
| 1175 | } |
| 1176 | |
Johannes Sixt | 2d22c20 | 2007-10-19 21:48:00 +0200 | [diff] [blame] | 1177 | int start_async(struct async *async) |
| 1178 | { |
Erik Faye-Lund | ae6a560 | 2010-02-05 12:57:38 -0800 | [diff] [blame] | 1179 | int need_in, need_out; |
| 1180 | int fdin[2], fdout[2]; |
| 1181 | int proc_in, proc_out; |
Johannes Sixt | 2d22c20 | 2007-10-19 21:48:00 +0200 | [diff] [blame] | 1182 | |
Erik Faye-Lund | ae6a560 | 2010-02-05 12:57:38 -0800 | [diff] [blame] | 1183 | need_in = async->in < 0; |
| 1184 | if (need_in) { |
| 1185 | if (pipe(fdin) < 0) { |
| 1186 | if (async->out > 0) |
| 1187 | close(async->out); |
Nguyễn Thái Ngọc Duy | fbcb0e0 | 2016-05-08 16:47:53 +0700 | [diff] [blame] | 1188 | return error_errno("cannot create pipe"); |
Erik Faye-Lund | ae6a560 | 2010-02-05 12:57:38 -0800 | [diff] [blame] | 1189 | } |
| 1190 | async->in = fdin[1]; |
| 1191 | } |
| 1192 | |
| 1193 | need_out = async->out < 0; |
| 1194 | if (need_out) { |
| 1195 | if (pipe(fdout) < 0) { |
| 1196 | if (need_in) |
| 1197 | close_pair(fdin); |
| 1198 | else if (async->in) |
| 1199 | close(async->in); |
Nguyễn Thái Ngọc Duy | fbcb0e0 | 2016-05-08 16:47:53 +0700 | [diff] [blame] | 1200 | return error_errno("cannot create pipe"); |
Erik Faye-Lund | ae6a560 | 2010-02-05 12:57:38 -0800 | [diff] [blame] | 1201 | } |
| 1202 | async->out = fdout[0]; |
| 1203 | } |
| 1204 | |
| 1205 | if (need_in) |
| 1206 | proc_in = fdin[0]; |
| 1207 | else if (async->in) |
| 1208 | proc_in = async->in; |
| 1209 | else |
| 1210 | proc_in = -1; |
| 1211 | |
| 1212 | if (need_out) |
| 1213 | proc_out = fdout[1]; |
| 1214 | else if (async->out) |
| 1215 | proc_out = async->out; |
| 1216 | else |
| 1217 | proc_out = -1; |
Johannes Sixt | 2d22c20 | 2007-10-19 21:48:00 +0200 | [diff] [blame] | 1218 | |
Johannes Sixt | f6b6098 | 2010-03-09 21:00:36 +0100 | [diff] [blame] | 1219 | #ifdef NO_PTHREADS |
Anders Melchiorsen | 2c3766f | 2008-08-04 02:30:03 +0200 | [diff] [blame] | 1220 | /* Flush stdio before fork() to avoid cloning buffers */ |
| 1221 | fflush(NULL); |
| 1222 | |
Johannes Sixt | 2d22c20 | 2007-10-19 21:48:00 +0200 | [diff] [blame] | 1223 | async->pid = fork(); |
| 1224 | if (async->pid < 0) { |
Nguyễn Thái Ngọc Duy | fbcb0e0 | 2016-05-08 16:47:53 +0700 | [diff] [blame] | 1225 | error_errno("fork (async) failed"); |
Erik Faye-Lund | ae6a560 | 2010-02-05 12:57:38 -0800 | [diff] [blame] | 1226 | goto error; |
Johannes Sixt | 2d22c20 | 2007-10-19 21:48:00 +0200 | [diff] [blame] | 1227 | } |
| 1228 | if (!async->pid) { |
Erik Faye-Lund | ae6a560 | 2010-02-05 12:57:38 -0800 | [diff] [blame] | 1229 | if (need_in) |
| 1230 | close(fdin[1]); |
| 1231 | if (need_out) |
| 1232 | close(fdout[0]); |
Etienne Buira | 0f4b6db | 2014-10-18 14:31:15 +0200 | [diff] [blame] | 1233 | git_atexit_clear(); |
Jeff King | 661a8cf | 2015-09-01 16:22:43 -0400 | [diff] [blame] | 1234 | process_is_async = 1; |
Erik Faye-Lund | ae6a560 | 2010-02-05 12:57:38 -0800 | [diff] [blame] | 1235 | exit(!!async->proc(proc_in, proc_out, async->data)); |
Johannes Sixt | 2d22c20 | 2007-10-19 21:48:00 +0200 | [diff] [blame] | 1236 | } |
Erik Faye-Lund | ae6a560 | 2010-02-05 12:57:38 -0800 | [diff] [blame] | 1237 | |
Lars Schneider | ac2fbaa | 2016-10-16 16:20:28 -0700 | [diff] [blame] | 1238 | mark_child_for_cleanup(async->pid, NULL); |
Jeff King | afe19ff | 2012-01-07 12:42:43 +0100 | [diff] [blame] | 1239 | |
Erik Faye-Lund | ae6a560 | 2010-02-05 12:57:38 -0800 | [diff] [blame] | 1240 | if (need_in) |
| 1241 | close(fdin[0]); |
| 1242 | else if (async->in) |
| 1243 | close(async->in); |
| 1244 | |
| 1245 | if (need_out) |
| 1246 | close(fdout[1]); |
| 1247 | else if (async->out) |
| 1248 | close(async->out); |
Johannes Sixt | 618ebe9 | 2007-12-08 22:19:14 +0100 | [diff] [blame] | 1249 | #else |
Johannes Sixt | 0ea1c89 | 2010-03-06 16:40:43 +0100 | [diff] [blame] | 1250 | if (!main_thread_set) { |
| 1251 | /* |
| 1252 | * We assume that the first time that start_async is called |
| 1253 | * it is from the main thread. |
| 1254 | */ |
| 1255 | main_thread_set = 1; |
| 1256 | main_thread = pthread_self(); |
| 1257 | pthread_key_create(&async_key, NULL); |
Jeff King | 1ece66b | 2013-04-16 15:50:07 -0400 | [diff] [blame] | 1258 | pthread_key_create(&async_die_counter, NULL); |
Johannes Sixt | 0ea1c89 | 2010-03-06 16:40:43 +0100 | [diff] [blame] | 1259 | set_die_routine(die_async); |
Jeff King | 1ece66b | 2013-04-16 15:50:07 -0400 | [diff] [blame] | 1260 | set_die_is_recursing_routine(async_die_is_recursing); |
Johannes Sixt | 0ea1c89 | 2010-03-06 16:40:43 +0100 | [diff] [blame] | 1261 | } |
| 1262 | |
Johannes Sixt | 200a76b | 2010-03-06 16:40:42 +0100 | [diff] [blame] | 1263 | if (proc_in >= 0) |
| 1264 | set_cloexec(proc_in); |
| 1265 | if (proc_out >= 0) |
| 1266 | set_cloexec(proc_out); |
Erik Faye-Lund | ae6a560 | 2010-02-05 12:57:38 -0800 | [diff] [blame] | 1267 | async->proc_in = proc_in; |
| 1268 | async->proc_out = proc_out; |
Johannes Sixt | 200a76b | 2010-03-06 16:40:42 +0100 | [diff] [blame] | 1269 | { |
| 1270 | int err = pthread_create(&async->tid, NULL, run_thread, async); |
| 1271 | if (err) { |
Nguyễn Thái Ngọc Duy | 2179045 | 2018-11-03 09:48:50 +0100 | [diff] [blame] | 1272 | error(_("cannot create async thread: %s"), strerror(err)); |
Johannes Sixt | 200a76b | 2010-03-06 16:40:42 +0100 | [diff] [blame] | 1273 | goto error; |
| 1274 | } |
Johannes Sixt | 618ebe9 | 2007-12-08 22:19:14 +0100 | [diff] [blame] | 1275 | } |
| 1276 | #endif |
Johannes Sixt | 2d22c20 | 2007-10-19 21:48:00 +0200 | [diff] [blame] | 1277 | return 0; |
Erik Faye-Lund | ae6a560 | 2010-02-05 12:57:38 -0800 | [diff] [blame] | 1278 | |
| 1279 | error: |
| 1280 | if (need_in) |
| 1281 | close_pair(fdin); |
| 1282 | else if (async->in) |
| 1283 | close(async->in); |
| 1284 | |
| 1285 | if (need_out) |
| 1286 | close_pair(fdout); |
| 1287 | else if (async->out) |
| 1288 | close(async->out); |
| 1289 | return -1; |
Johannes Sixt | 2d22c20 | 2007-10-19 21:48:00 +0200 | [diff] [blame] | 1290 | } |
| 1291 | |
| 1292 | int finish_async(struct async *async) |
| 1293 | { |
Johannes Sixt | f6b6098 | 2010-03-09 21:00:36 +0100 | [diff] [blame] | 1294 | #ifdef NO_PTHREADS |
Johannes Schindelin | 0d58fef | 2021-02-02 22:09:52 +0100 | [diff] [blame] | 1295 | int ret = wait_or_whine(async->pid, "child process", 0); |
| 1296 | |
| 1297 | invalidate_lstat_cache(); |
| 1298 | |
| 1299 | return ret; |
Johannes Sixt | 618ebe9 | 2007-12-08 22:19:14 +0100 | [diff] [blame] | 1300 | #else |
Johannes Sixt | 200a76b | 2010-03-06 16:40:42 +0100 | [diff] [blame] | 1301 | void *ret = (void *)(intptr_t)(-1); |
| 1302 | |
| 1303 | if (pthread_join(async->tid, &ret)) |
| 1304 | error("pthread_join failed"); |
Johannes Schindelin | 0d58fef | 2021-02-02 22:09:52 +0100 | [diff] [blame] | 1305 | invalidate_lstat_cache(); |
Johannes Sixt | 200a76b | 2010-03-06 16:40:42 +0100 | [diff] [blame] | 1306 | return (int)(intptr_t)ret; |
Johannes Schindelin | 0d58fef | 2021-02-02 22:09:52 +0100 | [diff] [blame] | 1307 | |
Johannes Sixt | 618ebe9 | 2007-12-08 22:19:14 +0100 | [diff] [blame] | 1308 | #endif |
Johannes Sixt | 2d22c20 | 2007-10-19 21:48:00 +0200 | [diff] [blame] | 1309 | } |
Stephan Beyer | ae98a00 | 2009-01-16 20:09:59 +0100 | [diff] [blame] | 1310 | |
Nguyễn Thái Ngọc Duy | c0e40a2 | 2018-11-03 09:48:39 +0100 | [diff] [blame] | 1311 | int async_with_fork(void) |
| 1312 | { |
| 1313 | #ifdef NO_PTHREADS |
| 1314 | return 1; |
| 1315 | #else |
| 1316 | return 0; |
| 1317 | #endif |
| 1318 | } |
| 1319 | |
Nguyễn Thái Ngọc Duy | dcf6926 | 2014-11-30 15:24:27 +0700 | [diff] [blame] | 1320 | const char *find_hook(const char *name) |
Aaron Schrab | 5a7da2d | 2013-01-13 00:17:02 -0500 | [diff] [blame] | 1321 | { |
Jeff King | 03f2c77 | 2015-08-10 05:37:45 -0400 | [diff] [blame] | 1322 | static struct strbuf path = STRBUF_INIT; |
Aaron Schrab | 5a7da2d | 2013-01-13 00:17:02 -0500 | [diff] [blame] | 1323 | |
Jeff King | 03f2c77 | 2015-08-10 05:37:45 -0400 | [diff] [blame] | 1324 | strbuf_reset(&path); |
Johannes Schindelin | 9445b49 | 2016-08-16 15:14:27 +0200 | [diff] [blame] | 1325 | strbuf_git_path(&path, "hooks/%s", name); |
Johannes Schindelin | 235be51 | 2017-01-30 13:28:28 +0100 | [diff] [blame] | 1326 | if (access(path.buf, X_OK) < 0) { |
Damien Marié | f805a00 | 2017-10-06 08:07:55 +0000 | [diff] [blame] | 1327 | int err = errno; |
| 1328 | |
Johannes Schindelin | 235be51 | 2017-01-30 13:28:28 +0100 | [diff] [blame] | 1329 | #ifdef STRIP_EXTENSION |
| 1330 | strbuf_addstr(&path, STRIP_EXTENSION); |
| 1331 | if (access(path.buf, X_OK) >= 0) |
| 1332 | return path.buf; |
Damien Marié | f805a00 | 2017-10-06 08:07:55 +0000 | [diff] [blame] | 1333 | if (errno == EACCES) |
| 1334 | err = errno; |
Johannes Schindelin | 235be51 | 2017-01-30 13:28:28 +0100 | [diff] [blame] | 1335 | #endif |
Damien Marié | f805a00 | 2017-10-06 08:07:55 +0000 | [diff] [blame] | 1336 | |
Ben Boeckel | ed9bff0 | 2021-08-23 12:44:00 +0200 | [diff] [blame] | 1337 | if (err == EACCES && advice_enabled(ADVICE_IGNORED_HOOK)) { |
Damien Marié | f805a00 | 2017-10-06 08:07:55 +0000 | [diff] [blame] | 1338 | static struct string_list advise_given = STRING_LIST_INIT_DUP; |
| 1339 | |
| 1340 | if (!string_list_lookup(&advise_given, name)) { |
| 1341 | string_list_insert(&advise_given, name); |
| 1342 | advise(_("The '%s' hook was ignored because " |
| 1343 | "it's not set as executable.\n" |
| 1344 | "You can disable this warning with " |
| 1345 | "`git config advice.ignoredHook false`."), |
| 1346 | path.buf); |
| 1347 | } |
| 1348 | } |
Jeff King | 03f2c77 | 2015-08-10 05:37:45 -0400 | [diff] [blame] | 1349 | return NULL; |
Johannes Schindelin | 235be51 | 2017-01-30 13:28:28 +0100 | [diff] [blame] | 1350 | } |
Jeff King | 03f2c77 | 2015-08-10 05:37:45 -0400 | [diff] [blame] | 1351 | return path.buf; |
Aaron Schrab | 5a7da2d | 2013-01-13 00:17:02 -0500 | [diff] [blame] | 1352 | } |
| 1353 | |
Benoit Pierre | 15048f8 | 2014-03-18 11:00:53 +0100 | [diff] [blame] | 1354 | int run_hook_ve(const char *const *env, const char *name, va_list args) |
Stephan Beyer | ae98a00 | 2009-01-16 20:09:59 +0100 | [diff] [blame] | 1355 | { |
René Scharfe | d318027 | 2014-08-19 21:09:35 +0200 | [diff] [blame] | 1356 | struct child_process hook = CHILD_PROCESS_INIT; |
Benoit Pierre | 15048f8 | 2014-03-18 11:00:53 +0100 | [diff] [blame] | 1357 | const char *p; |
Stephan Beyer | ae98a00 | 2009-01-16 20:09:59 +0100 | [diff] [blame] | 1358 | |
Aaron Schrab | 5a7da2d | 2013-01-13 00:17:02 -0500 | [diff] [blame] | 1359 | p = find_hook(name); |
| 1360 | if (!p) |
Stephan Beyer | cf94ca8 | 2009-01-16 20:10:01 +0100 | [diff] [blame] | 1361 | return 0; |
| 1362 | |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 1363 | strvec_push(&hook.args, p); |
René Scharfe | d1d0945 | 2014-07-16 23:57:47 +0200 | [diff] [blame] | 1364 | while ((p = va_arg(args, const char *))) |
Jeff King | c972bf4 | 2020-07-28 16:25:12 -0400 | [diff] [blame] | 1365 | strvec_push(&hook.args, p); |
Benoit Pierre | 15048f8 | 2014-03-18 11:00:53 +0100 | [diff] [blame] | 1366 | hook.env = env; |
Stephan Beyer | ae98a00 | 2009-01-16 20:09:59 +0100 | [diff] [blame] | 1367 | hook.no_stdin = 1; |
| 1368 | hook.stdout_to_stderr = 1; |
Jeff Hostetler | ee4512e | 2019-02-22 14:25:01 -0800 | [diff] [blame] | 1369 | hook.trace2_hook_name = name; |
Stephan Beyer | ae98a00 | 2009-01-16 20:09:59 +0100 | [diff] [blame] | 1370 | |
René Scharfe | d1d0945 | 2014-07-16 23:57:47 +0200 | [diff] [blame] | 1371 | return run_command(&hook); |
Stephan Beyer | ae98a00 | 2009-01-16 20:09:59 +0100 | [diff] [blame] | 1372 | } |
Benoit Pierre | 15048f8 | 2014-03-18 11:00:53 +0100 | [diff] [blame] | 1373 | |
| 1374 | int run_hook_le(const char *const *env, const char *name, ...) |
| 1375 | { |
| 1376 | va_list args; |
| 1377 | int ret; |
| 1378 | |
| 1379 | va_start(args, name); |
| 1380 | ret = run_hook_ve(env, name, args); |
| 1381 | va_end(args); |
| 1382 | |
| 1383 | return ret; |
| 1384 | } |
Jeff King | 911ec99 | 2015-03-22 23:53:43 -0400 | [diff] [blame] | 1385 | |
Jeff King | 96335bc | 2016-06-17 19:38:47 -0400 | [diff] [blame] | 1386 | struct io_pump { |
| 1387 | /* initialized by caller */ |
| 1388 | int fd; |
| 1389 | int type; /* POLLOUT or POLLIN */ |
| 1390 | union { |
| 1391 | struct { |
| 1392 | const char *buf; |
| 1393 | size_t len; |
| 1394 | } out; |
| 1395 | struct { |
| 1396 | struct strbuf *buf; |
| 1397 | size_t hint; |
| 1398 | } in; |
| 1399 | } u; |
| 1400 | |
| 1401 | /* returned by pump_io */ |
| 1402 | int error; /* 0 for success, otherwise errno */ |
| 1403 | |
| 1404 | /* internal use */ |
| 1405 | struct pollfd *pfd; |
| 1406 | }; |
| 1407 | |
| 1408 | static int pump_io_round(struct io_pump *slots, int nr, struct pollfd *pfd) |
Jeff King | 911ec99 | 2015-03-22 23:53:43 -0400 | [diff] [blame] | 1409 | { |
Jeff King | 96335bc | 2016-06-17 19:38:47 -0400 | [diff] [blame] | 1410 | int pollsize = 0; |
| 1411 | int i; |
| 1412 | |
| 1413 | for (i = 0; i < nr; i++) { |
| 1414 | struct io_pump *io = &slots[i]; |
| 1415 | if (io->fd < 0) |
| 1416 | continue; |
| 1417 | pfd[pollsize].fd = io->fd; |
| 1418 | pfd[pollsize].events = io->type; |
| 1419 | io->pfd = &pfd[pollsize++]; |
| 1420 | } |
| 1421 | |
| 1422 | if (!pollsize) |
| 1423 | return 0; |
| 1424 | |
| 1425 | if (poll(pfd, pollsize, -1) < 0) { |
| 1426 | if (errno == EINTR) |
| 1427 | return 1; |
| 1428 | die_errno("poll failed"); |
| 1429 | } |
| 1430 | |
| 1431 | for (i = 0; i < nr; i++) { |
| 1432 | struct io_pump *io = &slots[i]; |
| 1433 | |
| 1434 | if (io->fd < 0) |
| 1435 | continue; |
| 1436 | |
| 1437 | if (!(io->pfd->revents & (POLLOUT|POLLIN|POLLHUP|POLLERR|POLLNVAL))) |
| 1438 | continue; |
| 1439 | |
| 1440 | if (io->type == POLLOUT) { |
| 1441 | ssize_t len = xwrite(io->fd, |
| 1442 | io->u.out.buf, io->u.out.len); |
| 1443 | if (len < 0) { |
| 1444 | io->error = errno; |
| 1445 | close(io->fd); |
| 1446 | io->fd = -1; |
| 1447 | } else { |
| 1448 | io->u.out.buf += len; |
| 1449 | io->u.out.len -= len; |
| 1450 | if (!io->u.out.len) { |
| 1451 | close(io->fd); |
| 1452 | io->fd = -1; |
| 1453 | } |
| 1454 | } |
| 1455 | } |
| 1456 | |
| 1457 | if (io->type == POLLIN) { |
| 1458 | ssize_t len = strbuf_read_once(io->u.in.buf, |
| 1459 | io->fd, io->u.in.hint); |
| 1460 | if (len < 0) |
| 1461 | io->error = errno; |
| 1462 | if (len <= 0) { |
| 1463 | close(io->fd); |
| 1464 | io->fd = -1; |
| 1465 | } |
| 1466 | } |
| 1467 | } |
| 1468 | |
| 1469 | return 1; |
| 1470 | } |
| 1471 | |
| 1472 | static int pump_io(struct io_pump *slots, int nr) |
| 1473 | { |
| 1474 | struct pollfd *pfd; |
| 1475 | int i; |
| 1476 | |
| 1477 | for (i = 0; i < nr; i++) |
| 1478 | slots[i].error = 0; |
| 1479 | |
| 1480 | ALLOC_ARRAY(pfd, nr); |
| 1481 | while (pump_io_round(slots, nr, pfd)) |
| 1482 | ; /* nothing */ |
| 1483 | free(pfd); |
| 1484 | |
| 1485 | /* There may be multiple errno values, so just pick the first. */ |
| 1486 | for (i = 0; i < nr; i++) { |
| 1487 | if (slots[i].error) { |
| 1488 | errno = slots[i].error; |
| 1489 | return -1; |
| 1490 | } |
| 1491 | } |
| 1492 | return 0; |
| 1493 | } |
| 1494 | |
| 1495 | |
| 1496 | int pipe_command(struct child_process *cmd, |
| 1497 | const char *in, size_t in_len, |
| 1498 | struct strbuf *out, size_t out_hint, |
| 1499 | struct strbuf *err, size_t err_hint) |
| 1500 | { |
| 1501 | struct io_pump io[3]; |
| 1502 | int nr = 0; |
| 1503 | |
| 1504 | if (in) |
| 1505 | cmd->in = -1; |
| 1506 | if (out) |
| 1507 | cmd->out = -1; |
| 1508 | if (err) |
| 1509 | cmd->err = -1; |
| 1510 | |
Jeff King | 911ec99 | 2015-03-22 23:53:43 -0400 | [diff] [blame] | 1511 | if (start_command(cmd) < 0) |
| 1512 | return -1; |
| 1513 | |
Jeff King | 96335bc | 2016-06-17 19:38:47 -0400 | [diff] [blame] | 1514 | if (in) { |
| 1515 | io[nr].fd = cmd->in; |
| 1516 | io[nr].type = POLLOUT; |
| 1517 | io[nr].u.out.buf = in; |
| 1518 | io[nr].u.out.len = in_len; |
| 1519 | nr++; |
| 1520 | } |
| 1521 | if (out) { |
| 1522 | io[nr].fd = cmd->out; |
| 1523 | io[nr].type = POLLIN; |
| 1524 | io[nr].u.in.buf = out; |
| 1525 | io[nr].u.in.hint = out_hint; |
| 1526 | nr++; |
| 1527 | } |
| 1528 | if (err) { |
| 1529 | io[nr].fd = cmd->err; |
| 1530 | io[nr].type = POLLIN; |
| 1531 | io[nr].u.in.buf = err; |
| 1532 | io[nr].u.in.hint = err_hint; |
| 1533 | nr++; |
| 1534 | } |
| 1535 | |
| 1536 | if (pump_io(io, nr) < 0) { |
Jeff King | 911ec99 | 2015-03-22 23:53:43 -0400 | [diff] [blame] | 1537 | finish_command(cmd); /* throw away exit code */ |
| 1538 | return -1; |
| 1539 | } |
| 1540 | |
Jeff King | 911ec99 | 2015-03-22 23:53:43 -0400 | [diff] [blame] | 1541 | return finish_command(cmd); |
| 1542 | } |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 1543 | |
| 1544 | enum child_state { |
| 1545 | GIT_CP_FREE, |
| 1546 | GIT_CP_WORKING, |
| 1547 | GIT_CP_WAIT_CLEANUP, |
| 1548 | }; |
| 1549 | |
| 1550 | struct parallel_processes { |
| 1551 | void *data; |
| 1552 | |
| 1553 | int max_processes; |
| 1554 | int nr_processes; |
| 1555 | |
| 1556 | get_next_task_fn get_next_task; |
| 1557 | start_failure_fn start_failure; |
| 1558 | task_finished_fn task_finished; |
| 1559 | |
| 1560 | struct { |
| 1561 | enum child_state state; |
| 1562 | struct child_process process; |
| 1563 | struct strbuf err; |
| 1564 | void *data; |
| 1565 | } *children; |
| 1566 | /* |
| 1567 | * The struct pollfd is logically part of *children, |
| 1568 | * but the system call expects it as its own array. |
| 1569 | */ |
| 1570 | struct pollfd *pfd; |
| 1571 | |
| 1572 | unsigned shutdown : 1; |
| 1573 | |
| 1574 | int output_owner; |
| 1575 | struct strbuf buffered_output; /* of finished children */ |
| 1576 | }; |
| 1577 | |
Stefan Beller | aa71049 | 2016-02-29 18:07:16 -0800 | [diff] [blame] | 1578 | static int default_start_failure(struct strbuf *out, |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 1579 | void *pp_cb, |
| 1580 | void *pp_task_cb) |
| 1581 | { |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 1582 | return 0; |
| 1583 | } |
| 1584 | |
| 1585 | static int default_task_finished(int result, |
Stefan Beller | aa71049 | 2016-02-29 18:07:16 -0800 | [diff] [blame] | 1586 | struct strbuf *out, |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 1587 | void *pp_cb, |
| 1588 | void *pp_task_cb) |
| 1589 | { |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 1590 | return 0; |
| 1591 | } |
| 1592 | |
| 1593 | static void kill_children(struct parallel_processes *pp, int signo) |
| 1594 | { |
| 1595 | int i, n = pp->max_processes; |
| 1596 | |
| 1597 | for (i = 0; i < n; i++) |
| 1598 | if (pp->children[i].state == GIT_CP_WORKING) |
| 1599 | kill(pp->children[i].process.pid, signo); |
| 1600 | } |
| 1601 | |
| 1602 | static struct parallel_processes *pp_for_signal; |
| 1603 | |
| 1604 | static void handle_children_on_signal(int signo) |
| 1605 | { |
| 1606 | kill_children(pp_for_signal, signo); |
| 1607 | sigchain_pop(signo); |
| 1608 | raise(signo); |
| 1609 | } |
| 1610 | |
| 1611 | static void pp_init(struct parallel_processes *pp, |
| 1612 | int n, |
| 1613 | get_next_task_fn get_next_task, |
| 1614 | start_failure_fn start_failure, |
| 1615 | task_finished_fn task_finished, |
| 1616 | void *data) |
| 1617 | { |
| 1618 | int i; |
| 1619 | |
| 1620 | if (n < 1) |
| 1621 | n = online_cpus(); |
| 1622 | |
| 1623 | pp->max_processes = n; |
| 1624 | |
| 1625 | trace_printf("run_processes_parallel: preparing to run up to %d tasks", n); |
| 1626 | |
| 1627 | pp->data = data; |
| 1628 | if (!get_next_task) |
Johannes Schindelin | 033abf9 | 2018-05-02 11:38:39 +0200 | [diff] [blame] | 1629 | BUG("you need to specify a get_next_task function"); |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 1630 | pp->get_next_task = get_next_task; |
| 1631 | |
| 1632 | pp->start_failure = start_failure ? start_failure : default_start_failure; |
| 1633 | pp->task_finished = task_finished ? task_finished : default_task_finished; |
| 1634 | |
| 1635 | pp->nr_processes = 0; |
| 1636 | pp->output_owner = 0; |
| 1637 | pp->shutdown = 0; |
René Scharfe | ca56dad | 2021-03-13 17:17:22 +0100 | [diff] [blame] | 1638 | CALLOC_ARRAY(pp->children, n); |
| 1639 | CALLOC_ARRAY(pp->pfd, n); |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 1640 | strbuf_init(&pp->buffered_output, 0); |
| 1641 | |
| 1642 | for (i = 0; i < n; i++) { |
| 1643 | strbuf_init(&pp->children[i].err, 0); |
| 1644 | child_process_init(&pp->children[i].process); |
| 1645 | pp->pfd[i].events = POLLIN | POLLHUP; |
| 1646 | pp->pfd[i].fd = -1; |
| 1647 | } |
| 1648 | |
| 1649 | pp_for_signal = pp; |
| 1650 | sigchain_push_common(handle_children_on_signal); |
| 1651 | } |
| 1652 | |
| 1653 | static void pp_cleanup(struct parallel_processes *pp) |
| 1654 | { |
| 1655 | int i; |
| 1656 | |
| 1657 | trace_printf("run_processes_parallel: done"); |
| 1658 | for (i = 0; i < pp->max_processes; i++) { |
| 1659 | strbuf_release(&pp->children[i].err); |
| 1660 | child_process_clear(&pp->children[i].process); |
| 1661 | } |
| 1662 | |
| 1663 | free(pp->children); |
| 1664 | free(pp->pfd); |
| 1665 | |
| 1666 | /* |
| 1667 | * When get_next_task added messages to the buffer in its last |
| 1668 | * iteration, the buffered output is non empty. |
| 1669 | */ |
Stefan Beller | 2dac9b5 | 2016-02-29 18:07:15 -0800 | [diff] [blame] | 1670 | strbuf_write(&pp->buffered_output, stderr); |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 1671 | strbuf_release(&pp->buffered_output); |
| 1672 | |
| 1673 | sigchain_pop_common(); |
| 1674 | } |
| 1675 | |
| 1676 | /* returns |
| 1677 | * 0 if a new task was started. |
| 1678 | * 1 if no new jobs was started (get_next_task ran out of work, non critical |
| 1679 | * problem with starting a new command) |
| 1680 | * <0 no new job was started, user wishes to shutdown early. Use negative code |
| 1681 | * to signal the children. |
| 1682 | */ |
| 1683 | static int pp_start_one(struct parallel_processes *pp) |
| 1684 | { |
| 1685 | int i, code; |
| 1686 | |
| 1687 | for (i = 0; i < pp->max_processes; i++) |
| 1688 | if (pp->children[i].state == GIT_CP_FREE) |
| 1689 | break; |
| 1690 | if (i == pp->max_processes) |
Johannes Schindelin | 033abf9 | 2018-05-02 11:38:39 +0200 | [diff] [blame] | 1691 | BUG("bookkeeping is hard"); |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 1692 | |
| 1693 | code = pp->get_next_task(&pp->children[i].process, |
| 1694 | &pp->children[i].err, |
| 1695 | pp->data, |
| 1696 | &pp->children[i].data); |
| 1697 | if (!code) { |
| 1698 | strbuf_addbuf(&pp->buffered_output, &pp->children[i].err); |
| 1699 | strbuf_reset(&pp->children[i].err); |
| 1700 | return 1; |
| 1701 | } |
| 1702 | pp->children[i].process.err = -1; |
| 1703 | pp->children[i].process.stdout_to_stderr = 1; |
| 1704 | pp->children[i].process.no_stdin = 1; |
| 1705 | |
| 1706 | if (start_command(&pp->children[i].process)) { |
Stefan Beller | 2a73b3d | 2016-02-29 13:57:06 -0800 | [diff] [blame] | 1707 | code = pp->start_failure(&pp->children[i].err, |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 1708 | pp->data, |
Johannes Schindelin | c1e860f | 2017-07-19 16:56:19 +0200 | [diff] [blame] | 1709 | pp->children[i].data); |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 1710 | strbuf_addbuf(&pp->buffered_output, &pp->children[i].err); |
| 1711 | strbuf_reset(&pp->children[i].err); |
| 1712 | if (code) |
| 1713 | pp->shutdown = 1; |
| 1714 | return code; |
| 1715 | } |
| 1716 | |
| 1717 | pp->nr_processes++; |
| 1718 | pp->children[i].state = GIT_CP_WORKING; |
| 1719 | pp->pfd[i].fd = pp->children[i].process.err; |
| 1720 | return 0; |
| 1721 | } |
| 1722 | |
| 1723 | static void pp_buffer_stderr(struct parallel_processes *pp, int output_timeout) |
| 1724 | { |
| 1725 | int i; |
| 1726 | |
| 1727 | while ((i = poll(pp->pfd, pp->max_processes, output_timeout)) < 0) { |
| 1728 | if (errno == EINTR) |
| 1729 | continue; |
| 1730 | pp_cleanup(pp); |
| 1731 | die_errno("poll"); |
| 1732 | } |
| 1733 | |
| 1734 | /* Buffer output from all pipes. */ |
| 1735 | for (i = 0; i < pp->max_processes; i++) { |
| 1736 | if (pp->children[i].state == GIT_CP_WORKING && |
| 1737 | pp->pfd[i].revents & (POLLIN | POLLHUP)) { |
| 1738 | int n = strbuf_read_once(&pp->children[i].err, |
| 1739 | pp->children[i].process.err, 0); |
| 1740 | if (n == 0) { |
| 1741 | close(pp->children[i].process.err); |
| 1742 | pp->children[i].state = GIT_CP_WAIT_CLEANUP; |
| 1743 | } else if (n < 0) |
| 1744 | if (errno != EAGAIN) |
| 1745 | die_errno("read"); |
| 1746 | } |
| 1747 | } |
| 1748 | } |
| 1749 | |
| 1750 | static void pp_output(struct parallel_processes *pp) |
| 1751 | { |
| 1752 | int i = pp->output_owner; |
| 1753 | if (pp->children[i].state == GIT_CP_WORKING && |
| 1754 | pp->children[i].err.len) { |
Stefan Beller | 2dac9b5 | 2016-02-29 18:07:15 -0800 | [diff] [blame] | 1755 | strbuf_write(&pp->children[i].err, stderr); |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 1756 | strbuf_reset(&pp->children[i].err); |
| 1757 | } |
| 1758 | } |
| 1759 | |
| 1760 | static int pp_collect_finished(struct parallel_processes *pp) |
| 1761 | { |
| 1762 | int i, code; |
| 1763 | int n = pp->max_processes; |
| 1764 | int result = 0; |
| 1765 | |
| 1766 | while (pp->nr_processes > 0) { |
| 1767 | for (i = 0; i < pp->max_processes; i++) |
| 1768 | if (pp->children[i].state == GIT_CP_WAIT_CLEANUP) |
| 1769 | break; |
| 1770 | if (i == pp->max_processes) |
| 1771 | break; |
| 1772 | |
| 1773 | code = finish_command(&pp->children[i].process); |
| 1774 | |
Stefan Beller | 2a73b3d | 2016-02-29 13:57:06 -0800 | [diff] [blame] | 1775 | code = pp->task_finished(code, |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 1776 | &pp->children[i].err, pp->data, |
Johannes Schindelin | c1e860f | 2017-07-19 16:56:19 +0200 | [diff] [blame] | 1777 | pp->children[i].data); |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 1778 | |
| 1779 | if (code) |
| 1780 | result = code; |
| 1781 | if (code < 0) |
| 1782 | break; |
| 1783 | |
| 1784 | pp->nr_processes--; |
| 1785 | pp->children[i].state = GIT_CP_FREE; |
| 1786 | pp->pfd[i].fd = -1; |
| 1787 | child_process_init(&pp->children[i].process); |
| 1788 | |
| 1789 | if (i != pp->output_owner) { |
| 1790 | strbuf_addbuf(&pp->buffered_output, &pp->children[i].err); |
| 1791 | strbuf_reset(&pp->children[i].err); |
| 1792 | } else { |
Stefan Beller | 2dac9b5 | 2016-02-29 18:07:15 -0800 | [diff] [blame] | 1793 | strbuf_write(&pp->children[i].err, stderr); |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 1794 | strbuf_reset(&pp->children[i].err); |
| 1795 | |
| 1796 | /* Output all other finished child processes */ |
Stefan Beller | 2dac9b5 | 2016-02-29 18:07:15 -0800 | [diff] [blame] | 1797 | strbuf_write(&pp->buffered_output, stderr); |
Stefan Beller | c553c72 | 2015-12-15 16:04:10 -0800 | [diff] [blame] | 1798 | strbuf_reset(&pp->buffered_output); |
| 1799 | |
| 1800 | /* |
| 1801 | * Pick next process to output live. |
| 1802 | * NEEDSWORK: |
| 1803 | * For now we pick it randomly by doing a round |
| 1804 | * robin. Later we may want to pick the one with |
| 1805 | * the most output or the longest or shortest |
| 1806 | * running process time. |
| 1807 | */ |
| 1808 | for (i = 0; i < n; i++) |
| 1809 | if (pp->children[(pp->output_owner + i) % n].state == GIT_CP_WORKING) |
| 1810 | break; |
| 1811 | pp->output_owner = (pp->output_owner + i) % n; |
| 1812 | } |
| 1813 | } |
| 1814 | return result; |
| 1815 | } |
| 1816 | |
| 1817 | int run_processes_parallel(int n, |
| 1818 | get_next_task_fn get_next_task, |
| 1819 | start_failure_fn start_failure, |
| 1820 | task_finished_fn task_finished, |
| 1821 | void *pp_cb) |
| 1822 | { |
| 1823 | int i, code; |
| 1824 | int output_timeout = 100; |
| 1825 | int spawn_cap = 4; |
| 1826 | struct parallel_processes pp; |
| 1827 | |
| 1828 | pp_init(&pp, n, get_next_task, start_failure, task_finished, pp_cb); |
| 1829 | while (1) { |
| 1830 | for (i = 0; |
| 1831 | i < spawn_cap && !pp.shutdown && |
| 1832 | pp.nr_processes < pp.max_processes; |
| 1833 | i++) { |
| 1834 | code = pp_start_one(&pp); |
| 1835 | if (!code) |
| 1836 | continue; |
| 1837 | if (code < 0) { |
| 1838 | pp.shutdown = 1; |
| 1839 | kill_children(&pp, -code); |
| 1840 | } |
| 1841 | break; |
| 1842 | } |
| 1843 | if (!pp.nr_processes) |
| 1844 | break; |
| 1845 | pp_buffer_stderr(&pp, output_timeout); |
| 1846 | pp_output(&pp); |
| 1847 | code = pp_collect_finished(&pp); |
| 1848 | if (code) { |
| 1849 | pp.shutdown = 1; |
| 1850 | if (code < 0) |
| 1851 | kill_children(&pp, -code); |
| 1852 | } |
| 1853 | } |
| 1854 | |
| 1855 | pp_cleanup(&pp); |
| 1856 | return 0; |
| 1857 | } |
Jeff Hostetler | ee4512e | 2019-02-22 14:25:01 -0800 | [diff] [blame] | 1858 | |
| 1859 | int run_processes_parallel_tr2(int n, get_next_task_fn get_next_task, |
| 1860 | start_failure_fn start_failure, |
| 1861 | task_finished_fn task_finished, void *pp_cb, |
| 1862 | const char *tr2_category, const char *tr2_label) |
| 1863 | { |
| 1864 | int result; |
| 1865 | |
| 1866 | trace2_region_enter_printf(tr2_category, tr2_label, NULL, "max:%d", |
| 1867 | ((n < 1) ? online_cpus() : n)); |
| 1868 | |
| 1869 | result = run_processes_parallel(n, get_next_task, start_failure, |
| 1870 | task_finished, pp_cb); |
| 1871 | |
| 1872 | trace2_region_leave(tr2_category, tr2_label, NULL); |
| 1873 | |
| 1874 | return result; |
| 1875 | } |
Junio C Hamano | 850b6ed | 2020-05-06 13:18:29 -0700 | [diff] [blame] | 1876 | |
Derrick Stolee | a95ce12 | 2020-09-17 18:11:44 +0000 | [diff] [blame] | 1877 | int run_auto_maintenance(int quiet) |
Junio C Hamano | 850b6ed | 2020-05-06 13:18:29 -0700 | [diff] [blame] | 1878 | { |
Derrick Stolee | 1942d48 | 2020-08-28 15:45:12 +0000 | [diff] [blame] | 1879 | int enabled; |
Derrick Stolee | a95ce12 | 2020-09-17 18:11:44 +0000 | [diff] [blame] | 1880 | struct child_process maint = CHILD_PROCESS_INIT; |
Junio C Hamano | 850b6ed | 2020-05-06 13:18:29 -0700 | [diff] [blame] | 1881 | |
Derrick Stolee | 1942d48 | 2020-08-28 15:45:12 +0000 | [diff] [blame] | 1882 | if (!git_config_get_bool("maintenance.auto", &enabled) && |
| 1883 | !enabled) |
| 1884 | return 0; |
| 1885 | |
Derrick Stolee | a95ce12 | 2020-09-17 18:11:44 +0000 | [diff] [blame] | 1886 | maint.git_cmd = 1; |
| 1887 | strvec_pushl(&maint.args, "maintenance", "run", "--auto", NULL); |
| 1888 | strvec_push(&maint.args, quiet ? "--quiet" : "--no-quiet"); |
| 1889 | |
| 1890 | return run_command(&maint); |
Junio C Hamano | 850b6ed | 2020-05-06 13:18:29 -0700 | [diff] [blame] | 1891 | } |
Jonathan Tan | d1fa943 | 2021-06-17 10:13:25 -0700 | [diff] [blame] | 1892 | |
| 1893 | void prepare_other_repo_env(struct strvec *env_array, const char *new_git_dir) |
| 1894 | { |
| 1895 | const char * const *var; |
| 1896 | |
| 1897 | for (var = local_repo_env; *var; var++) { |
| 1898 | if (strcmp(*var, CONFIG_DATA_ENVIRONMENT) && |
| 1899 | strcmp(*var, CONFIG_COUNT_ENVIRONMENT)) |
| 1900 | strvec_push(env_array, *var); |
| 1901 | } |
| 1902 | strvec_pushf(env_array, "%s=%s", GIT_DIR_ENVIRONMENT, new_git_dir); |
| 1903 | } |