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>
45 #include <sys/types.h>
46 #include <sys/sysctl.h>
59 static void usage(void);
60 static u_int get_pageins(void);
65 main(int argc, char *argv[])
67 const struct passwd *pw;
68 int ch, howto, i, fd, lflag, nflag, qflag, pflag, sverrno;
70 const char *p, *user, *kernel = NULL;
72 if (strstr((p = rindex(*argv, '/')) ? p + 1 : *argv, "halt")) {
77 lflag = nflag = qflag = 0;
78 while ((ch = getopt(argc, argv, "dk:lnpq")) != -1)
107 if ((howto & (RB_DUMP | RB_HALT)) == (RB_DUMP | RB_HALT))
108 errx(1, "cannot dump (-d) when halting; must reboot instead");
119 if (kernel != NULL) {
120 fd = open("/boot/nextboot.conf", O_WRONLY | O_CREAT | O_TRUNC,
123 (void)write(fd, "nextboot_enable=\"YES\"\n", 22);
124 (void)write(fd, "kernel=\"", 8L);
125 (void)write(fd, kernel, strlen(kernel));
126 (void)write(fd, "\"\n", 2);
131 /* Log the reboot. */
133 if ((user = getlogin()) == NULL)
134 user = (pw = getpwuid(getuid())) ?
137 openlog("halt", 0, LOG_AUTH | LOG_CONS);
138 syslog(LOG_CRIT, "halted by %s", user);
140 openlog("reboot", 0, LOG_AUTH | LOG_CONS);
141 syslog(LOG_CRIT, "rebooted by %s", user);
144 logwtmp("~", "shutdown", "");
147 * Do a sync early on, so disks start transfers while we're off
148 * killing processes. Don't worry about writes done before the
149 * processes die, the reboot system call syncs the disks.
155 * Ignore signals that we can get as a result of killing
156 * parents, group leaders, etc.
158 (void)signal(SIGHUP, SIG_IGN);
159 (void)signal(SIGINT, SIG_IGN);
160 (void)signal(SIGQUIT, SIG_IGN);
161 (void)signal(SIGTERM, SIG_IGN);
162 (void)signal(SIGTSTP, SIG_IGN);
165 * If we're running in a pipeline, we don't want to die
166 * after killing whatever we're writing to.
168 (void)signal(SIGPIPE, SIG_IGN);
170 /* Just stop init -- if we fail, we'll restart it. */
171 if (kill(1, SIGTSTP) == -1)
172 err(1, "SIGTSTP init");
174 /* Send a SIGTERM first, a chance to save the buffers. */
175 if (kill(-1, SIGTERM) == -1 && errno != ESRCH)
176 err(1, "SIGTERM processes");
179 * After the processes receive the signal, start the rest of the
180 * buffers on their way. Wait 5 seconds between the SIGTERM and
181 * the SIGKILL to give everybody a chance. If there is a lot of
182 * paging activity then wait longer, up to a maximum of approx
186 for (i = 0; i < 20; i++) {
187 pageins = get_pageins();
191 if (get_pageins() == pageins)
196 if (kill(-1, SIGKILL) == -1) {
202 (void)fprintf(stderr,
203 "WARNING: some process(es) wouldn't die\n");
214 errx(1, "%s%s", kill(1, SIGHUP) == -1 ? "(can't restart init): " : "",
222 (void)fprintf(stderr, "usage: %s [-%slnpq] [-k kernel]\n",
223 getprogname(), dohalt ? "" : "d");
233 len = sizeof(pageins);
234 if (sysctlbyname("vm.stats.vm.v_swappgsin", &pageins, &len, NULL, 0)
236 warnx("v_swappgsin");