halt.tproj/halt.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright (c) 1980, 1986 The Regents of the University of California.
  26  * All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by the University of
  39  *      California, Berkeley and its contributors.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  */
  56
  57 #ifndef lint
  58 char copyright[] =
  59 "@(#) Copyright (c) 1980, 1986 The Regents of the University of California.\n\
  60  All rights reserved.\n";
  61 #endif /* not lint */
  62
  63 #ifndef lint
  64 /*static char sccsid[] = "from: @(#)halt.c      5.10 (Berkeley) 4/3/91";*/
  65 static char rcsid[] = "$Id: halt.c,v 1.1.1.2 2000/01/11 02:10:15 wsanchez Exp $";
  66 #endif /* not lint */
  67
  68 /*
  69  * Halt
  70  */
  71 #include <sys/types.h>
  72 #include <sys/reboot.h>
  73 #include <sys/time.h>
  74 #include <sys/syslog.h>
  75 #include <sys/signal.h>
  76 #include <errno.h>
  77 #include <pwd.h>
  78 #include <stdio.h>
  79 #include <paths.h>
  80
  81 main(argc, argv)
  82         int argc;
  83         char **argv;
  84 {
  85         register int i;
  86         register int qflag = 0;
  87         struct passwd *pw;
  88         int ch, howto, needlog = 1;
  89         char *user, *ttyn, *getlogin(), *ttyname();
  90
  91         howto = RB_HALT;
  92         ttyn = ttyname(2);
  93         while ((ch = getopt(argc, argv, "lnqy")) != EOF)
  94                 switch((char)ch) {
  95                 case 'l':               /* undocumented; for shutdown(8) */
  96                         needlog = 0;
  97                         break;
  98                 case 'n':
  99                         howto |= RB_NOSYNC;
 100                         break;
 101                 case 'q':
 102                         qflag++;
 103                         break;
 104                 case 'y':
 105                         ttyn = 0;
 106                         break;
 107                 case '?':
 108                 default:
 109                         fprintf(stderr, "usage: halt [-nqy]\n");
 110                         exit(1);
 111                 }
 112
 113         if (ttyn && ttyn[sizeof(_PATH_TTY) - 1] == 'd') {
 114                 fprintf(stderr, "halt: dangerous on a dialup; use ``halt -y'' if you are really sure\n");
 115                 exit(1);
 116         }
 117
 118         if (needlog) {
 119                 openlog("halt", 0, LOG_AUTH);
 120                 if ((user = getlogin()) == NULL)
 121                         if ((pw = getpwuid(getuid())))
 122                                 user = pw->pw_name;
 123                         else
 124                                 user = "???";
 125                 syslog(LOG_CRIT, "halted by %s", user);
 126         }
 127
 128         signal(SIGHUP, SIG_IGN);                /* for network connections */
 129         if (kill(1, SIGTSTP) == -1) {
 130                 fprintf(stderr, "halt: can't idle init\n");
 131                 exit(1);
 132         }
 133 #if 0
 134         sleep(1);
 135         (void) kill(-1, SIGTERM);       /* one chance to catch it */
 136         sleep(5);
 137
 138         if (!qflag) for (i = 1; ; i++) {
 139                 if (kill(-1, SIGKILL) == -1) {
 140                         extern int errno;
 141
 142                         if (errno == ESRCH)
 143                                 break;
 144
 145                         perror("halt: kill");
 146                         kill(1, SIGHUP);
 147                         exit(1);
 148                 }
 149                 if (i > 5) {
 150                         fprintf(stderr,
 151                             "CAUTION: some process(es) wouldn't die\n");
 152                         break;
 153                 }
 154                 setalarm(2 * i);
 155                 pause();
 156         }
 157         if (!qflag && (howto & RB_NOSYNC) == 0) {
 158                 logwtmp("~", "shutdown", "");
 159                 sync();
 160                 setalarm(5);
 161                 pause();
 162         }
 163 #endif
 164         reboot(howto);
 165         perror("halt");
 166 }
 167
 168 void
 169 dingdong()
 170 {
 171         /* RRRIIINNNGGG RRRIIINNNGGG */
 172 }
 173
 174 setalarm(n)
 175         int n;
 176 {
 177         signal(SIGALRM, dingdong);
 178         alarm(n);
 179 }