134 lines
3 KiB
C
134 lines
3 KiB
C
/*
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* cinit
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* (c) 2005 Nico Schottelius (nico-linux at schottelius.org)
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* We are called by signal to reboot
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*/
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#include <sys/mount.h>
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#include <sys/types.h>
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#include <sys/reboot.h>
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#include <unistd.h>
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#include <signal.h>
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#include <stdio.h>
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#include <time.h>
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#include <stdlib.h>
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#include "cinit.h"
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/***********************************************************************
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* sig_reboot
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* Shutdown the system
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*/
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void sig_reboot(int signal)
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{
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struct listitem *tmp;
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struct timespec ts;
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char **cmd;
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int i;
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D_PRINTF("sig_reboot() startet");
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tmp = list->before;
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do {
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/* kill service watcher, which will kill processes itself */
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if( tmp->status == ST_RESPAWN) {
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D_PRINTF("Bringing down respawn watcher");
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kill(tmp->pid,SIGTERM);
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}
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/* execute shutdown service */
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D_PRINTF("Executing off-service");
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exec_svc(tmp->abs_path,0);
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tmp = tmp->before;
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} while( tmp != list );
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/* Let's disappear */
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close(sock);
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if(umount(CINIT_TMNT) == -1) {
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perror("umount");
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}
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/* now: all services are down, lets kill all other processes */
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if( kill(-1,SIGTERM) == -1) {
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perror(MSG_TERMKILL);
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}
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D_PRINTF("SIGTERM GESENDET");
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ts.tv_sec = SLEEP_KILL; /* defined in conf/ */
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nanosleep(&ts,NULL);
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if( kill(-1,SIGKILL) == -1) {
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perror(MSG_KILLBILL);
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}
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D_PRINTF("SIGKILL GESENDET");
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/* now: we are completly alone. umount everything, go to bed */
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/* THIS IS FUCKING UNCLEAN AND SHOULD BE CLEANED UP VERY MUCH!!! */
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#define CMD_CNT 5
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#define SWAP_OFF_CMD "/sbin/swapoff"
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#define SWAP_OFF_ARG1 "-a"
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#define UMOUNT_CMD "/bin/umount"
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#define UMOUNT_ARG1 "-a"
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#define MOUNT_CMD "/bin/mount"
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#define MOUNT_ARG1 "-o"
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#define MOUNT_ARG2 "remount,ro"
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#define MOUNT_ARG3 "/"
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cmd = (char **) malloc( (CMD_CNT+1) * ( sizeof (char*) ) );
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if(cmd) {
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// cmd[0] = (char *) malloc(strlen(SWAP_OFF_CMD) +1);
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// cmd[1] = (char *) malloc(strlen(SWAP_OFF_CMD) +1);
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/* /sbin/swapoff -a */
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cmd[0] = SWAP_OFF_CMD;
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cmd[1] = SWAP_OFF_ARG1;
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cmd[2] = NULL;
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i = fork();
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if(i == 0) {
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execv(cmd[0],cmd);
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_exit(1); /* if exec fails in child */
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}
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/* /bin/umount -a */
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cmd[0] = UMOUNT_CMD;
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cmd[1] = UMOUNT_ARG1;
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cmd[2] = NULL;
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i = fork();
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if(i == 0) {
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execv(cmd[0],cmd);
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_exit(1); /* if exec fails in child */
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}
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/* /bin/mount -o remount,ro / */
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cmd[0] = MOUNT_CMD;
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cmd[1] = MOUNT_ARG1;
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cmd[2] = MOUNT_ARG1;
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cmd[3] = MOUNT_ARG1;
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cmd[4] = NULL;
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i = fork();
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if(i == 0) {
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execv(cmd[0],cmd);
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_exit(1); /* if exec fails in child */
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}
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}
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switch(signal) {
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case SIGUSR1: /* halt */
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reboot(RB_HALT_SYSTEM);
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break;
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case SIGTERM: /* power off */
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reboot(RB_POWER_OFF);
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break;
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case SIGHUP: /* reboot */
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reboot(RB_AUTOBOOT);
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break;
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}
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_exit(0);
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}
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