2 #include "run-command.h"
5 static inline void close_pair(int fd[2])
11 static inline void dup_devnull(int to)
13 int fd = open("/dev/null", O_RDWR);
18 int start_command(struct child_process *cmd)
20 int need_in, need_out, need_err;
21 int fdin[2], fdout[2], fderr[2];
24 * In case of errors we must keep the promise to close FDs
25 * that have been passed in via ->in and ->out.
28 need_in = !cmd->no_stdin && cmd->in < 0;
33 return -ERR_RUN_COMMAND_PIPE;
38 need_out = !cmd->no_stdout
39 && !cmd->stdout_to_stderr
42 if (pipe(fdout) < 0) {
47 return -ERR_RUN_COMMAND_PIPE;
52 need_err = !cmd->no_stderr && cmd->err < 0;
54 if (pipe(fderr) < 0) {
63 return -ERR_RUN_COMMAND_PIPE;
90 else if (cmd->stdout_to_stderr)
95 } else if (cmd->out > 1) {
100 if (cmd->dir && chdir(cmd->dir))
101 die("exec %s: cd to %s failed (%s)", cmd->argv[0],
102 cmd->dir, strerror(errno));
104 for (; *cmd->env; cmd->env++) {
105 if (strchr(*cmd->env, '='))
106 putenv((char*)*cmd->env);
114 execv_perf_cmd(cmd->argv);
116 execvp(cmd->argv[0], (char *const*) cmd->argv);
133 return err == ENOENT ?
134 -ERR_RUN_COMMAND_EXEC :
135 -ERR_RUN_COMMAND_FORK;
154 static int wait_or_whine(pid_t pid)
158 pid_t waiting = waitpid(pid, &status, 0);
163 error("waitpid failed (%s)", strerror(errno));
164 return -ERR_RUN_COMMAND_WAITPID;
167 return -ERR_RUN_COMMAND_WAITPID_WRONG_PID;
168 if (WIFSIGNALED(status))
169 return -ERR_RUN_COMMAND_WAITPID_SIGNAL;
171 if (!WIFEXITED(status))
172 return -ERR_RUN_COMMAND_WAITPID_NOEXIT;
173 code = WEXITSTATUS(status);
176 return -ERR_RUN_COMMAND_EXEC;
185 int finish_command(struct child_process *cmd)
187 return wait_or_whine(cmd->pid);
190 int run_command(struct child_process *cmd)
192 int code = start_command(cmd);
195 return finish_command(cmd);
198 static void prepare_run_command_v_opt(struct child_process *cmd,
202 memset(cmd, 0, sizeof(*cmd));
204 cmd->no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0;
205 cmd->perf_cmd = opt & RUN_PERF_CMD ? 1 : 0;
206 cmd->stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0;
209 int run_command_v_opt(const char **argv, int opt)
211 struct child_process cmd;
212 prepare_run_command_v_opt(&cmd, argv, opt);
213 return run_command(&cmd);