NetBSD/sbin/halt/halt.c

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1993-03-21 12:45:37 +03:00
/*
* 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
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/*static char sccsid[] = "from: @(#)halt.c 5.10 (Berkeley) 4/3/91";*/
static char rcsid[] = "$Id: halt.c,v 1.4 1993/08/01 18:27:00 mycroft Exp $";
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#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);
}