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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 static const char copyright[] =
33 "@(#) Copyright (c) 1980, 1986, 1993\n\
34 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)reboot.c 8.1 (Berkeley) 6/5/93";
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
44 #include <sys/reboot.h>
46 #include <sys/types.h>
47 #include <sys/sysctl.h>
60 static void usage(void);
61 static u_int get_pageins(void);
66 main(int argc, char *argv[])
69 const struct passwd *pw;
70 int ch, howto, i, fd, lflag, nflag, qflag, sverrno, Nflag;
72 const char *user, *kernel = NULL;
74 if (strcmp(getprogname(), "halt") == 0) {
79 lflag = nflag = qflag = Nflag = 0;
80 while ((ch = getopt(argc, argv, "dk:lNnpqr")) != -1)
100 howto |= RB_POWEROFF;
115 if ((howto & (RB_DUMP | RB_HALT)) == (RB_DUMP | RB_HALT))
116 errx(1, "cannot dump (-d) when halting; must reboot instead");
117 if (Nflag && (howto & RB_NOSYNC) != 0)
118 errx(1, "-N cannot be used with -n");
119 if ((howto & RB_REROOT) != 0 && howto != RB_REROOT)
120 errx(1, "-r cannot be used with -d, -n, or -p");
131 if (kernel != NULL) {
132 fd = open("/boot/nextboot.conf", O_WRONLY | O_CREAT | O_TRUNC,
135 (void)write(fd, "nextboot_enable=\"YES\"\n", 22);
136 (void)write(fd, "kernel=\"", 8L);
137 (void)write(fd, kernel, strlen(kernel));
138 (void)write(fd, "\"\n", 2);
143 /* Log the reboot. */
145 if ((user = getlogin()) == NULL)
146 user = (pw = getpwuid(getuid())) ?
149 openlog("halt", 0, LOG_AUTH | LOG_CONS);
150 syslog(LOG_CRIT, "halted by %s", user);
151 } else if (howto & RB_REROOT) {
152 openlog("reroot", 0, LOG_AUTH | LOG_CONS);
153 syslog(LOG_CRIT, "rerooted by %s", user);
155 openlog("reboot", 0, LOG_AUTH | LOG_CONS);
156 syslog(LOG_CRIT, "rebooted by %s", user);
159 utx.ut_type = SHUTDOWN_TIME;
160 gettimeofday(&utx.ut_tv, NULL);
164 * Do a sync early on, so disks start transfers while we're off
165 * killing processes. Don't worry about writes done before the
166 * processes die, the reboot system call syncs the disks.
172 * Ignore signals that we can get as a result of killing
173 * parents, group leaders, etc.
175 (void)signal(SIGHUP, SIG_IGN);
176 (void)signal(SIGINT, SIG_IGN);
177 (void)signal(SIGQUIT, SIG_IGN);
178 (void)signal(SIGTERM, SIG_IGN);
179 (void)signal(SIGTSTP, SIG_IGN);
182 * If we're running in a pipeline, we don't want to die
183 * after killing whatever we're writing to.
185 (void)signal(SIGPIPE, SIG_IGN);
188 * Only init(8) can perform rerooting.
190 if (howto & RB_REROOT) {
191 if (kill(1, SIGEMT) == -1)
192 err(1, "SIGEMT init");
197 /* Just stop init -- if we fail, we'll restart it. */
198 if (kill(1, SIGTSTP) == -1)
199 err(1, "SIGTSTP init");
201 /* Send a SIGTERM first, a chance to save the buffers. */
202 if (kill(-1, SIGTERM) == -1 && errno != ESRCH)
203 err(1, "SIGTERM processes");
206 * After the processes receive the signal, start the rest of the
207 * buffers on their way. Wait 5 seconds between the SIGTERM and
208 * the SIGKILL to give everybody a chance. If there is a lot of
209 * paging activity then wait longer, up to a maximum of approx
213 for (i = 0; i < 20; i++) {
214 pageins = get_pageins();
218 if (get_pageins() == pageins)
223 if (kill(-1, SIGKILL) == -1) {
229 (void)fprintf(stderr,
230 "WARNING: some process(es) wouldn't die\n");
241 errx(1, "%s%s", kill(1, SIGHUP) == -1 ? "(can't restart init): " : "",
250 (void)fprintf(stderr, dohalt ?
251 "usage: halt [-lnpq] [-k kernel]\n" :
252 "usage: reboot [-dlnpq] [-k kernel]\n");
262 len = sizeof(pageins);
263 if (sysctlbyname("vm.stats.vm.v_swappgsin", &pageins, &len, NULL, 0)
265 warnx("v_swappgsin");