sbase/setsid.c
Laslo Hunhold e92a1aef54 Handle { NULL } argv[] properly in manual arg-reduction
Thanks izabera for reporting this!
2017-08-05 23:50:39 +02:00

41 lines
618 B
C

/* See LICENSE file for copyright and license details. */
#include <errno.h>
#include <unistd.h>
#include "util.h"
static void
usage(void)
{
eprintf("usage: %s cmd [arg ...]\n", argv0);
}
int
main(int argc, char *argv[])
{
int savederrno;
argv0 = *argv, argv0 ? (argc--, argv++) : (void *)0;
if (!argc)
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]);
_exit(126 + (savederrno == ENOENT));
}