| #include "cache.h" |
| #include "run-command.h" |
| #include <sys/wait.h> |
| |
| int run_command_v_opt(int argc, char **argv, int flags) |
| { |
| pid_t pid = fork(); |
| |
| if (pid < 0) |
| return -ERR_RUN_COMMAND_FORK; |
| if (!pid) { |
| if (flags & RUN_COMMAND_NO_STDIO) { |
| int fd = open("/dev/null", O_RDWR); |
| dup2(fd, 0); |
| dup2(fd, 1); |
| close(fd); |
| } |
| execvp(argv[0], (char *const*) argv); |
| die("exec %s failed.", argv[0]); |
| } |
| for (;;) { |
| int status, code; |
| int retval = waitpid(pid, &status, 0); |
| |
| if (retval < 0) { |
| if (errno == EINTR) |
| continue; |
| error("waitpid failed (%s)", strerror(retval)); |
| return -ERR_RUN_COMMAND_WAITPID; |
| } |
| if (retval != pid) |
| return -ERR_RUN_COMMAND_WAITPID_WRONG_PID; |
| if (WIFSIGNALED(status)) |
| return -ERR_RUN_COMMAND_WAITPID_SIGNAL; |
| |
| if (!WIFEXITED(status)) |
| return -ERR_RUN_COMMAND_WAITPID_NOEXIT; |
| code = WEXITSTATUS(status); |
| if (code) |
| return -code; |
| return 0; |
| } |
| } |
| |
| int run_command_v(int argc, char **argv) |
| { |
| return run_command_v_opt(argc, argv, 0); |
| } |
| |
| int run_command(const char *cmd, ...) |
| { |
| int argc; |
| char *argv[MAX_RUN_COMMAND_ARGS]; |
| const char *arg; |
| va_list param; |
| |
| va_start(param, cmd); |
| argv[0] = (char*) cmd; |
| argc = 1; |
| while (argc < MAX_RUN_COMMAND_ARGS) { |
| arg = argv[argc++] = va_arg(param, char *); |
| if (!arg) |
| break; |
| } |
| va_end(param); |
| if (MAX_RUN_COMMAND_ARGS <= argc) |
| return error("too many args to run %s", cmd); |
| return run_command_v_opt(argc, argv, 0); |
| } |