busybox/init/poweroff.c
Eric Andersen b24d65659f If find_pid_by_name() had an error, it was returning -1, but storing
that into a pid_t, which is unsigned on a number archs.  Furthermore,
find_pid_by_name() would _never_ return an error if the intended proces
was "init", but instead would return 1, meaning we would fail to work
on 2.4.x kernels running an initrd...
 -Erik
2001-12-06 14:52:32 +00:00

42 lines
1.2 KiB
C

/* vi: set sw=4 ts=4: */
/*
* Mini poweroff implementation for busybox
*
*
* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "busybox.h"
#include <signal.h>
extern int poweroff_main(int argc, char **argv)
{
#ifdef CONFIG_FEATURE_INITRD
/* don't assume init's pid == 1 */
long *pid = find_pid_by_name("init");
if (!pid || *pid<=0) {
pid = find_pid_by_name("linuxrc");
if (!pid || *pid<=0)
error_msg_and_die("no process killed");
}
return(kill(*pid, SIGUSR2));
#else
return(kill(1, SIGUSR2));
#endif
}