/* * shutdown.c * * Shutdown a running system.  If built with -DAS_SHUTDOWN=1, then * it builds a standalone shutdown binary. * * Copyright 1996 - 2003 Red Hat, Inc. * * This software may be freely redistributed under the terms of the GNU * public license. * * 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., 675 Mass Ave, Cambridge, MA 02139, USA. */#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>#ifdef AS_SHUTDOWNint testing = 0;#elseextern int testing;#endifvoid disableSwap(void);void unmountFilesystems(void);static void rebootHandler(int signum) {    printf("rebooting system\n");#if USE_MINILIBC    reboot(0xfee1dead, 672274793, 0x1234567);#else    reboot(RB_AUTOBOOT);#endif}void shutDown(int noKill, int doReboot, int doPowerOff) {    sync(); sync();    if (!testing && !noKill) {	printf("sending termination signals...");	kill(-1, 15);	sleep(2);	printf("done\n");	printf("sending kill signals...");	kill(-1, 9);	sleep(2);	printf("done\n");    }    printf("disabling swap...\n");    disableSwap();    printf("unmounting filesystems...\n");     unmountFilesystems();    if (doReboot) {	printf("rebooting system\n");	sleep(2);#if USE_MINILIBC	reboot(0xfee1dead, 672274793, 0x1234567);#else	reboot(RB_AUTOBOOT);#endif    } else if (doPowerOff)  {        printf("powering off system\n");        reboot(RB_POWER_OFF);    } else {	printf("you may safely reboot your system\n");        signal(SIGINT, rebootHandler);        while (1) sleep(60);    }    exit(0);    return;}#ifdef AS_SHUTDOWNint 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, 0);    return 0;}#endif