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- /*
- * Copyright (c) 1980, 1986 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1980, 1986 The Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)halt.c 5.10 (Berkeley) 4/3/91";
- #endif /* not lint */
-
- /*
- * Halt
- */
- #include <sys/types.h>
- #include <sys/reboot.h>
- #include <sys/time.h>
- #include <sys/syslog.h>
- #include <sys/signal.h>
- #include <errno.h>
- #include <pwd.h>
- #include <stdio.h>
- #include <paths.h>
-
- main(argc, argv)
- int argc;
- char **argv;
- {
- register int i;
- register int qflag = 0;
- struct passwd *pw;
- int ch, howto, needlog = 1;
- char *user, *ttyn, *getlogin(), *ttyname();
-
- howto = RB_HALT;
- ttyn = ttyname(2);
- while ((ch = getopt(argc, argv, "lnqy")) != EOF)
- switch((char)ch) {
- case 'l': /* undocumented; for shutdown(8) */
- needlog = 0;
- break;
- case 'n':
- howto |= RB_NOSYNC;
- break;
- case 'q':
- qflag++;
- break;
- case 'y':
- ttyn = 0;
- break;
- case '?':
- default:
- fprintf(stderr, "usage: halt [-nqy]\n");
- exit(1);
- }
-
- if (ttyn && ttyn[sizeof(_PATH_TTY) - 1] == 'd') {
- fprintf(stderr, "halt: dangerous on a dialup; use ``halt -y'' if you are really sure\n");
- exit(1);
- }
-
- if (needlog) {
- openlog("halt", 0, LOG_AUTH);
- if ((user = getlogin()) == NULL)
- if ((pw = getpwuid(getuid())))
- user = pw->pw_name;
- else
- user = "???";
- syslog(LOG_CRIT, "halted by %s", user);
- }
-
- signal(SIGHUP, SIG_IGN); /* for network connections */
- if (kill(1, SIGTSTP) == -1) {
- fprintf(stderr, "halt: can't idle init\n");
- exit(1);
- }
- sleep(1);
- (void) kill(-1, SIGTERM); /* one chance to catch it */
- sleep(5);
-
- if (!qflag) for (i = 1; ; i++) {
- if (kill(-1, SIGKILL) == -1) {
- extern int errno;
-
- if (errno == ESRCH)
- break;
-
- perror("halt: kill");
- kill(1, SIGHUP);
- exit(1);
- }
- if (i > 5) {
- fprintf(stderr,
- "CAUTION: some process(es) wouldn't die\n");
- break;
- }
- setalarm(2 * i);
- pause();
- }
-
- if (!qflag && (howto & RB_NOSYNC) == 0) {
- logwtmp("~", "shutdown", "");
- sync();
- setalarm(5);
- pause();
- }
- reboot(howto);
- perror("halt");
- }
-
- void
- dingdong()
- {
- /* RRRIIINNNGGG RRRIIINNNGGG */
- }
-
- setalarm(n)
- int n;
- {
- signal(SIGALRM, dingdong);
- alarm(n);
- }
-