2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
35 static const char copyright[] =
36 "@(#) Copyright (c) 1980, 1986, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
42 static char sccsid[] = "@(#)reboot.c 8.1 (Berkeley) 6/5/93";
44 static const char rcsid[] =
48 #include <sys/reboot.h>
49 #include <sys/types.h>
50 #include <sys/sysctl.h>
63 u_int get_pageins(void);
68 main(int argc, char *argv[])
71 int ch, howto, i, lflag, nflag, qflag, pflag, sverrno;
76 if (strstr((p = rindex(*argv, '/')) ? p + 1 : *argv, "halt")) {
81 lflag = nflag = qflag = 0;
82 while ((ch = getopt(argc, argv, "dlnpq")) != -1)
96 howto |= (RB_POWEROFF | RB_HALT);
108 if ((howto & (RB_DUMP | RB_HALT)) == (RB_DUMP | RB_HALT))
109 errx(1, "cannot dump (-d) when halting; must reboot instead");
120 /* Log the reboot. */
122 if ((user = getlogin()) == NULL)
123 user = (pw = getpwuid(getuid())) ?
126 openlog("halt", 0, LOG_AUTH | LOG_CONS);
127 syslog(LOG_CRIT, "halted by %s", user);
129 openlog("reboot", 0, LOG_AUTH | LOG_CONS);
130 syslog(LOG_CRIT, "rebooted by %s", user);
133 logwtmp("~", "shutdown", "");
136 * Do a sync early on, so disks start transfers while we're off
137 * killing processes. Don't worry about writes done before the
138 * processes die, the reboot system call syncs the disks.
143 /* Just stop init -- if we fail, we'll restart it. */
144 if (kill(1, SIGTSTP) == -1)
145 err(1, "SIGTSTP init");
147 /* Ignore the SIGHUP we get when our parent shell dies. */
148 (void)signal(SIGHUP, SIG_IGN);
150 /* Send a SIGTERM first, a chance to save the buffers. */
151 if (kill(-1, SIGTERM) == -1)
152 err(1, "SIGTERM processes");
155 * After the processes receive the signal, start the rest of the
156 * buffers on their way. Wait 5 seconds between the SIGTERM and
157 * the SIGKILL to give everybody a chance. If there is a lot of
158 * paging activity then wait longer, up to a maximum of approx
162 for (i = 0; i < 20; i++) {
163 pageins = get_pageins();
167 if (get_pageins() == pageins)
172 if (kill(-1, SIGKILL) == -1) {
178 (void)fprintf(stderr,
179 "WARNING: some process(es) wouldn't die\n");
190 errx(1, "%s%s", kill(1, SIGHUP) == -1 ? "(can't restart init): " : "",
198 (void)fprintf(stderr, "usage: %s [-dnpq]\n",
199 dohalt ? "halt" : "reboot");
209 len = sizeof(pageins);
210 if (sysctlbyname("vm.stats.vm.v_swappgsin", &pageins, &len, NULL, 0)
212 warnx("v_swappgsin");