projects / thirdparty / git.git / blame
| Commit | Line | Data |
|---|---|---|
| b1bf95bb JW |
1 | #include "cache.h" |
| 2 | #include "run-command.h" | |
| 3 | #include <sys/wait.h> | |
| 4 | ||
| 5 | static int run_external_command(int argc, const char **argv) | |
| 6 | { | |
| 7 | pid_t pid = fork(); | |
| 8 | ||
| 9 | if (pid < 0) | |
| 10 | return -ERR_RUN_COMMAND_FORK; | |
| 11 | if (!pid) { | |
| 12 | execvp(argv[0], (char *const*) argv); | |
| 13 | return -ERR_RUN_COMMAND_EXEC; | |
| 14 | } | |
| 15 | for (;;) { | |
| 16 | int status, code; | |
| 17 | int retval = waitpid(pid, &status, 0); | |
| 18 | ||
| 19 | if (retval < 0) { | |
| 20 | if (errno == EINTR) | |
| 21 | continue; | |
| 22 | error("waitpid failed (%s)", strerror(retval)); | |
| 23 | return -ERR_RUN_COMMAND_WAITPID; | |
| 24 | } | |
| 25 | if (retval != pid) | |
| 26 | return -ERR_RUN_COMMAND_WAITPID_WRONG_PID; | |
| 27 | if (WIFSIGNALED(status)) | |
| 28 | return -ERR_RUN_COMMAND_WAITPID_SIGNAL; | |
| 29 | ||
| 30 | if (!WIFEXITED(status)) | |
| 31 | return -ERR_RUN_COMMAND_WAITPID_NOEXIT; | |
| 32 | code = WEXITSTATUS(status); | |
| 33 | if (code) | |
| 34 | return -code; | |
| 35 | return 0; | |
| 36 | } | |
| 37 | } | |
| 38 | ||
| 39 | int run_command(const char *cmd, ...) | |
| 40 | { | |
| 41 | int argc; | |
| 42 | const char *argv[MAX_RUN_COMMAND_ARGS]; | |
| 43 | const char *arg; | |
| 44 | va_list param; | |
| 45 | ||
| 46 | fprintf(stderr, "run-command %s (%d)\n", cmd, ERR_RUN_COMMAND_EXEC); | |
| 47 | ||
| 48 | va_start(param, cmd); | |
| 49 | argv[0] = cmd; | |
| 50 | argc = 1; | |
| 51 | while (argc < MAX_RUN_COMMAND_ARGS) { | |
| 52 | arg = argv[argc++] = va_arg(param, char *); | |
| 53 | if (!arg) | |
| 54 | break; | |
| 55 | } | |
| 56 | va_end(param); | |
| 57 | if (MAX_RUN_COMMAND_ARGS <= argc) | |
| 58 | return error("too many args to run %s", cmd); | |
| 59 | return run_external_command(argc, argv); | |
| 60 | } |