sbase/setsid.c
2020-07-25 13:48:46 -07:00

49 lines
677 B
C

/* See LICENSE file for copyright and license details. */
#include <errno.h>
#include <unistd.h>
#include "util.h"
static int fflag = 0;
static void
usage(void)
{
eprintf("usage: %s cmd [-f] [arg ...]\n", argv0);
}
int
main(int argc, char *argv[])
{
int savederrno;
ARGBEGIN {
case 'f':
fflag = 1;
break;
default:
usage();
} ARGEND
if (!argc)
usage();
if (fflag || getpgrp() == getpid()) {
switch (fork()) {
case -1:
eprintf("fork:");
case 0:
break;
default:
return 0;
}
}
if (setsid() < 0)
eprintf("setsid:");
execvp(argv[0], argv);
savederrno = errno;
weprintf("execvp %s:", argv[0]);
_exit(126 + (savederrno == ENOENT));
}