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/*
* shutdown.c
*
* Shutdown a running system. If built with -DAS_SHUTDOWN=1, then
* it builds a standalone shutdown binary.
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Red Hat, Inc.
* All rights reserved.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/reboot.h>
#include <sys/types.h>
#include <unistd.h>
#include "init.h"
#ifdef AS_SHUTDOWN
int testing = 0;
#else
extern int testing;
#endif
void disableSwap(void);
void unmountFilesystems(void);
static void performTerminations(int doKill) {
if (testing || !doKill)
return;
sync();
printf("sending termination signals...");
kill(-1, 15);
sleep(2);
printf("done\n");
printf("sending kill signals...");
kill(-1, 9);
sleep(2);
printf("done\n");
}
static void performUnmounts(int doKill) {
if (testing || !doKill)
return;
printf("disabling swap...\n");
disableSwap();
printf("unmounting filesystems...\n");
unmountFilesystems();
}
static void performReboot(reboot_action rebootAction) {
if (rebootAction == POWEROFF) {
printf("powering off system\n");
sleep(2);
reboot(RB_POWER_OFF);
} else if (rebootAction == REBOOT) {
printf("rebooting system\n");
sleep(2);
#if USE_MINILIBC
reboot(0xfee1dead, 672274793, 0x1234567);
#else
reboot(RB_AUTOBOOT);
#endif
}
}
int shouldReboot = 0;
static void rebootHandler(int signum) {
shouldReboot = 1;
}
void shutDown(int doKill, reboot_action rebootAction) {
if (rebootAction == POWEROFF || rebootAction == REBOOT) {
performUnmounts(doKill);
performTerminations(doKill);
if (!doKill)
performReboot(rebootAction);
}
if (!shouldReboot && rebootAction != REBOOT)
printf("you may safely reboot your system\n");
signal(SIGINT, rebootHandler);
while (1) {
if (shouldReboot) {
performUnmounts(1);
performTerminations(1);
performReboot(REBOOT);
}
sleep(1);
}
exit(0);
return;
}
#ifdef AS_SHUTDOWN
int main(int argc, char ** argv) {
int fd;
int doReboot = 0;
int i = 1;
while (i < argc) {
if (!strncmp("-r", argv[i], 2))
doReboot = 1;
i++;
}
/* ignore some signals so we don't kill ourself */
signal(SIGINT, SIG_IGN);
signal(SIGTSTP, SIG_IGN);
/* now change to / */
i = chdir("/");
/* redirect output to the real console */
fd = open("/dev/console", O_RDWR);
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
close(fd);
shutDown(0, doReboot ? REBOOT : HALT);
return 0;
}
#endif
/* vim:set shiftwidth=4 softtabstop=4 ts=4: */
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