sbase/setsid.c
2014-10-02 23:46:59 +01:00

45 lines
670 B
C

/* See LICENSE file for copyright and license details. */
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include "util.h"
static void
usage(void)
{
eprintf("usage: %s cmd [arg ...]\n", argv0);
}
int
main(int argc, char *argv[])
{
int savederrno;
ARGBEGIN {
default:
usage();
} ARGEND;
if (argc < 1)
usage();
if(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]);
return (savederrno == ENOENT) ? 127 : 126;
}