close(fd[1]);
}
+static inline void dup_devnull(int to)
+{
+ int fd = open("/dev/null", O_RDWR);
+ dup2(fd, to);
+ close(fd);
+}
+
int start_command(struct child_process *cmd)
{
- int need_in = !cmd->no_stdin && cmd->in < 0;
- int need_out = !cmd->stdout_to_stderr && cmd->out < 0;
+ int need_in, need_out;
int fdin[2], fdout[2];
+ need_in = !cmd->no_stdin && cmd->in < 0;
if (need_in) {
if (pipe(fdin) < 0)
return -ERR_RUN_COMMAND_PIPE;
cmd->close_in = 1;
}
+ need_out = !cmd->no_stdout
+ && !cmd->stdout_to_stderr
+ && cmd->out < 0;
if (need_out) {
if (pipe(fdout) < 0) {
if (need_in)
}
if (!cmd->pid) {
- if (cmd->no_stdin) {
- int fd = open("/dev/null", O_RDWR);
- dup2(fd, 0);
- close(fd);
- } else if (need_in) {
+ if (cmd->no_stdin)
+ dup_devnull(0);
+ else if (need_in) {
dup2(fdin[0], 0);
close_pair(fdin);
} else if (cmd->in) {
close(cmd->in);
}
- if (cmd->stdout_to_stderr)
+ if (cmd->no_stdout)
+ dup_devnull(1);
+ else if (cmd->stdout_to_stderr)
dup2(2, 1);
else if (need_out) {
dup2(fdout[1], 1);