2 #include "run-command.h"
6 static inline void close_pair(int fd[2])
12 static inline void dup_devnull(int to)
14 int fd = open("/dev/null", O_RDWR);
19 int start_command(struct child_process *cmd)
21 int need_in, need_out, need_err;
22 int fdin[2], fdout[2], fderr[2];
23 char sbuf[STRERR_BUFSIZE];
26 * In case of errors we must keep the promise to close FDs
27 * that have been passed in via ->in and ->out.
30 need_in = !cmd->no_stdin && cmd->in < 0;
35 return -ERR_RUN_COMMAND_PIPE;
40 need_out = !cmd->no_stdout
41 && !cmd->stdout_to_stderr
44 if (pipe(fdout) < 0) {
49 return -ERR_RUN_COMMAND_PIPE;
54 need_err = !cmd->no_stderr && cmd->err < 0;
56 if (pipe(fderr) < 0) {
65 return -ERR_RUN_COMMAND_PIPE;
92 else if (cmd->stdout_to_stderr)
97 } else if (cmd->out > 1) {
102 if (cmd->dir && chdir(cmd->dir))
103 die("exec %s: cd to %s failed (%s)", cmd->argv[0],
104 cmd->dir, strerror_r(errno, sbuf, sizeof(sbuf)));
106 for (; *cmd->env; cmd->env++) {
107 if (strchr(*cmd->env, '='))
108 putenv((char*)*cmd->env);
116 execv_perf_cmd(cmd->argv);
118 execvp(cmd->argv[0], (char *const*) cmd->argv);
135 return err == ENOENT ?
136 -ERR_RUN_COMMAND_EXEC :
137 -ERR_RUN_COMMAND_FORK;
156 static int wait_or_whine(pid_t pid)
158 char sbuf[STRERR_BUFSIZE];
162 pid_t waiting = waitpid(pid, &status, 0);
167 error("waitpid failed (%s)",
168 strerror_r(errno, sbuf, sizeof(sbuf)));
169 return -ERR_RUN_COMMAND_WAITPID;
172 return -ERR_RUN_COMMAND_WAITPID_WRONG_PID;
173 if (WIFSIGNALED(status))
174 return -ERR_RUN_COMMAND_WAITPID_SIGNAL;
176 if (!WIFEXITED(status))
177 return -ERR_RUN_COMMAND_WAITPID_NOEXIT;
178 code = WEXITSTATUS(status);
181 return -ERR_RUN_COMMAND_EXEC;
190 int finish_command(struct child_process *cmd)
192 return wait_or_whine(cmd->pid);
195 int run_command(struct child_process *cmd)
197 int code = start_command(cmd);
200 return finish_command(cmd);
203 static void prepare_run_command_v_opt(struct child_process *cmd,
207 memset(cmd, 0, sizeof(*cmd));
209 cmd->no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0;
210 cmd->perf_cmd = opt & RUN_PERF_CMD ? 1 : 0;
211 cmd->stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0;
214 int run_command_v_opt(const char **argv, int opt)
216 struct child_process cmd;
217 prepare_run_command_v_opt(&cmd, argv, opt);
218 return run_command(&cmd);