1 /* 2 * Copyright (c) 1980, 1986 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 char copyright[] = 36 "@(#) Copyright (c) 1980, 1986 The Regents of the University of California.\n\ 37 All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 /*static char sccsid[] = "from: @(#)reboot.c 5.11 (Berkeley) 2/27/91";*/ 42 static char rcsid[] = "$Id: reboot.c,v 1.5 1994/12/18 00:22:53 cgd Exp $"; 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 #include <sys/time.h> 47 #include <sys/syslog.h> 48 #include <sys/syscall.h> 49 #include <sys/reboot.h> 50 #include <sys/signal.h> 51 #include <pwd.h> 52 #include <stdio.h> 53 #include <errno.h> 54 #include <signal.h> 55 #include <unistd.h> 56 57 void setalarm __P((int)); 58 59 int 60 main(argc, argv) 61 int argc; 62 char **argv; 63 { 64 int howto; 65 register i; 66 register qflag = 0; 67 int needlog = 1; 68 char *user, *getlogin(); 69 struct passwd *pw; 70 71 openlog("reboot", 0, LOG_AUTH); 72 argc--, argv++; 73 howto = 0; 74 while (argc > 0) { 75 if (!strcmp(*argv, "-q")) 76 qflag++; 77 else if (!strcmp(*argv, "-n")) 78 howto |= RB_NOSYNC; 79 else if (!strcmp(*argv, "-l")) 80 needlog = 0; 81 else { 82 fprintf(stderr, 83 "usage: reboot [ -n ][ -q ]\n"); 84 exit(1); 85 } 86 argc--, argv++; 87 } 88 89 if (needlog) { 90 user = getlogin(); 91 if (user == (char *)0 && (pw = getpwuid(getuid()))) 92 user = pw->pw_name; 93 if (user == (char *)0) 94 user = "root"; 95 syslog(LOG_CRIT, "rebooted by %s", user); 96 } 97 98 signal(SIGHUP, SIG_IGN); /* for remote connections */ 99 if (kill(1, SIGTSTP) == -1) { 100 fprintf(stderr, "reboot: can't idle init\n"); 101 exit(1); 102 } 103 sleep(1); 104 (void) kill(-1, SIGTERM); /* one chance to catch it */ 105 sleep(5); 106 107 if (!qflag) for (i = 1; ; i++) { 108 if (kill(-1, SIGKILL) == -1) { 109 extern int errno; 110 111 if (errno == ESRCH) 112 break; 113 114 perror("reboot: kill"); 115 kill(1, SIGHUP); 116 exit(1); 117 } 118 if (i > 5) { 119 fprintf(stderr, 120 "CAUTION: some process(es) wouldn't die\n"); 121 break; 122 } 123 setalarm(2 * i); 124 pause(); 125 } 126 127 if (!qflag && (howto & RB_NOSYNC) == 0) { 128 logwtmp("~", "shutdown", ""); 129 sync(); 130 setalarm(5); 131 pause(); 132 } 133 syscall(SYS_reboot, howto); 134 perror("reboot"); 135 kill(1, SIGHUP); 136 exit(1); 137 } 138 139 void 140 dingdong() 141 { 142 /* RRRIIINNNGGG RRRIIINNNGGG */ 143 } 144 145 void 146 setalarm(n) 147 int n; 148 { 149 signal(SIGALRM, dingdong); 150 alarm(n); 151 } 152