sbase/setsid.c

46 lines
675 B
C
Raw Normal View History

/* See LICENSE file for copyright and license details. */
2013-10-07 11:37:23 -04:00
#include <errno.h>
2013-08-21 07:56:26 -04:00
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
2013-08-21 07:56:26 -04:00
#include "util.h"
static void
usage(void)
{
eprintf("usage: %s cmd [arg ...]\n", argv0);
}
int
main(int argc, char *argv[])
{
int savederrno;
2013-08-21 07:56:26 -04:00
ARGBEGIN {
default:
usage();
} ARGEND;
if (argc < 1)
usage();
if (getpgrp() == getpid()) {
switch (fork()) {
2013-08-21 07:56:26 -04:00
case -1:
eprintf("fork:");
case 0:
break;
default:
2014-10-02 18:46:04 -04:00
return 0;
2013-08-21 07:56:26 -04:00
}
}
if (setsid() < 0)
2013-08-21 07:56:26 -04:00
eprintf("setsid:");
execvp(argv[0], argv);
savederrno = errno;
weprintf("execvp %s:", argv[0]);
return (savederrno == ENOENT) ? 127 : 126;
2013-08-21 07:56:26 -04:00
}