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 1.4 1993/08/01 18:25:35 mycroft 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 55 main(argc, argv) 56 int argc; 57 char **argv; 58 { 59 int howto; 60 register char *argp; 61 register i; 62 register ok = 0; 63 register qflag = 0; 64 int needlog = 1; 65 char *user, *getlogin(); 66 struct passwd *pw; 67 68 openlog("reboot", 0, LOG_AUTH); 69 argc--, argv++; 70 howto = 0; 71 while (argc > 0) { 72 if (!strcmp(*argv, "-q")) 73 qflag++; 74 else if (!strcmp(*argv, "-n")) 75 howto |= RB_NOSYNC; 76 else if (!strcmp(*argv, "-l")) 77 needlog = 0; 78 else { 79 fprintf(stderr, 80 "usage: reboot [ -n ][ -q ]\n"); 81 exit(1); 82 } 83 argc--, argv++; 84 } 85 86 if (needlog) { 87 user = getlogin(); 88 if (user == (char *)0 && (pw = getpwuid(getuid()))) 89 user = pw->pw_name; 90 if (user == (char *)0) 91 user = "root"; 92 syslog(LOG_CRIT, "rebooted by %s", user); 93 } 94 95 signal(SIGHUP, SIG_IGN); /* for remote connections */ 96 if (kill(1, SIGTSTP) == -1) { 97 fprintf(stderr, "reboot: can't idle init\n"); 98 exit(1); 99 } 100 sleep(1); 101 (void) kill(-1, SIGTERM); /* one chance to catch it */ 102 sleep(5); 103 104 if (!qflag) for (i = 1; ; i++) { 105 if (kill(-1, SIGKILL) == -1) { 106 extern int errno; 107 108 if (errno == ESRCH) 109 break; 110 111 perror("reboot: kill"); 112 kill(1, SIGHUP); 113 exit(1); 114 } 115 if (i > 5) { 116 fprintf(stderr, 117 "CAUTION: some process(es) wouldn't die\n"); 118 break; 119 } 120 setalarm(2 * i); 121 pause(); 122 } 123 124 if (!qflag && (howto & RB_NOSYNC) == 0) { 125 logwtmp("~", "shutdown", ""); 126 sync(); 127 setalarm(5); 128 pause(); 129 } 130 syscall(SYS_reboot, howto); 131 perror("reboot"); 132 kill(1, SIGHUP); 133 exit(1); 134 } 135 136 void 137 dingdong() 138 { 139 /* RRRIIINNNGGG RRRIIINNNGGG */ 140 } 141 142 setalarm(n) 143 int n; 144 { 145 signal(SIGALRM, dingdong); 146 alarm(n); 147 } 148