[apple/system_cmds.git] / reboot.tproj / reboot.c

/*
 * Copyright (c) 1980, 1986, 1993
 *	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
static const char copyright[] =
"@(#) Copyright (c) 1980, 1986, 1993\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)reboot.c	8.1 (Berkeley) 6/5/93";
#endif
static const char rcsid[] =
  "$FreeBSD: src/sbin/reboot/reboot.c,v 1.17 2002/10/06 16:24:36 thomas Exp $";
#endif /* not lint */

#include <sys/reboot.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <signal.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <util.h>
#include <pwd.h>
#include <syslog.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

void usage(void);
u_int get_pageins(void);

int dohalt;

int
main(int argc, char *argv[])
{
	struct passwd *pw;
	int ch, howto, i, fd, kflag, lflag, nflag, qflag, pflag, sverrno;
	u_int pageins;
	char *kernel, *p;
	const char *user;

	if (strstr((p = rindex(*argv, '/')) ? p + 1 : *argv, "halt")) {
		dohalt = 1;
		howto = RB_HALT;
	} else
		howto = 0;
	kflag = lflag = nflag = qflag = 0;
#ifndef __APPLE__
	while ((ch = getopt(argc, argv, "dk:lnpq")) != -1)
#else
	while ((ch = getopt(argc, argv, "k:lnq")) != -1)
#endif
		switch(ch) {
#ifndef __APPLE__
		case 'd':
			howto |= RB_DUMP;
			break;
#endif
		case 'k':
			kflag = 1;
			kernel = optarg;
			break;
		case 'l':
			lflag = 1;
			break;
		case 'n':
			nflag = 1;
			howto |= RB_NOSYNC;
			break;
/* -p is irrelevant on OS X.  It does that anyway. */
#ifndef __APPLE__
		case 'p':
			pflag = 1;
			howto |= RB_POWEROFF;
			break;
#endif
		case 'q':
			qflag = 1;
			break;
		case '?':
		default:
			usage();
		}
	argc -= optind;
	argv += optind;

#ifndef __APPLE__
	if ((howto & (RB_DUMP | RB_HALT)) == (RB_DUMP | RB_HALT))
		errx(1, "cannot dump (-d) when halting; must reboot instead");
#endif
	if (geteuid()) {
		errno = EPERM;
		err(1, NULL);
	}

	if (qflag) {
		reboot(howto);
		err(1, NULL);
	}

	if (kflag) {
		fd = open("/boot/nextboot.conf", O_WRONLY | O_CREAT, 0444);
		if (fd > -1) {
			(void)write(fd, "nextboot_enable=\"YES\"\n", 22);
			(void)write(fd, "kernel=\"", 8L);
			(void)write(fd, kernel, strlen(kernel));
			(void)write(fd, "\"\n", 2);
			close(fd);
		}
	}

	/* Log the reboot. */
	if (!lflag)  {
		if ((user = getlogin()) == NULL)
			user = (pw = getpwuid(getuid())) ?
			    pw->pw_name : "???";
		if (dohalt) {
			openlog("halt", 0, LOG_AUTH | LOG_CONS);
			syslog(LOG_CRIT, "halted by %s", user);
		} else {
			openlog("reboot", 0, LOG_AUTH | LOG_CONS);
			syslog(LOG_CRIT, "rebooted by %s", user);
		}
	}
	logwtmp("~", "shutdown", "");

	/*
	 * Do a sync early on, so disks start transfers while we're off
	 * killing processes.  Don't worry about writes done before the
	 * processes die, the reboot system call syncs the disks.
	 */
	if (!nflag)
		sync();

	/* Just stop init -- if we fail, we'll restart it. */
	if (kill(1, SIGTSTP) == -1)
		err(1, "SIGTSTP init");

	/* Ignore the SIGHUP we get when our parent shell dies. */
	(void)signal(SIGHUP, SIG_IGN);

#ifndef __APPLE__
	/* Send a SIGTERM first, a chance to save the buffers. */
	if (kill(-1, SIGTERM) == -1)
		err(1, "SIGTERM processes");

	/*
	 * After the processes receive the signal, start the rest of the
	 * buffers on their way.  Wait 5 seconds between the SIGTERM and
	 * the SIGKILL to give everybody a chance. If there is a lot of
	 * paging activity then wait longer, up to a maximum of approx
	 * 60 seconds.
	 */
	sleep(2);
	for (i = 0; i < 20; i++) {
		pageins = get_pageins();
		if (!nflag)
			sync();
		sleep(3);
		if (get_pageins() == pageins)
			break;
	}

	for (i = 1;; ++i) {
		if (kill(-1, SIGKILL) == -1) {
			if (errno == ESRCH)
				break;
			goto restart;
		}
		if (i > 5) {
			(void)fprintf(stderr,
			    "WARNING: some process(es) wouldn't die\n");
			break;
		}
		(void)sleep(2 * i);
	}
#endif

	reboot(howto);
	/* FALLTHROUGH */

restart:
	sverrno = errno;
	errx(1, "%s%s", kill(1, SIGHUP) == -1 ? "(can't restart init): " : "",
	    strerror(sverrno));
	/* NOTREACHED */
}

void
usage()
{
	(void)fprintf(stderr, "usage: %s [-dnpq] [-k kernel]\n",
	    dohalt ? "halt" : "reboot");
	exit(1);
}

u_int
get_pageins()
{
	u_int pageins;
	size_t len;

	len = sizeof(pageins);
	if (sysctlbyname("vm.stats.vm.v_swappgsin", &pageins, &len, NULL, 0)
	    != 0) {
		warnx("v_swappgsin");
		return (0);
	}
	return pageins;
}
Commit	Line	Data
1815bff5 A	1	/*
1815bff5 A	2	* Copyright (c) 1980, 1986, 1993
20e66415	3	* The Regents of the University of California. All rights reserved.
1815bff5 A	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	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:
20e66415 A	15	* This product includes software developed by the University of
20e66415 A	16	* California, Berkeley and its contributors.
1815bff5 A	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.
	20	*
	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
	31	* SUCH DAMAGE.
	32	*/
	33
20e66415 A	34	#ifndef lint
	35	static const char copyright[] =
	36	"@(#) Copyright (c) 1980, 1986, 1993\n\
	37	The Regents of the University of California. All rights reserved.\n";
	38	#endif /* not lint */
	39
	40	#ifndef lint
	41	#if 0
	42	static char sccsid[] = "@(#)reboot.c 8.1 (Berkeley) 6/5/93";
	43	#endif
	44	static const char rcsid[] =
	45	"$FreeBSD: src/sbin/reboot/reboot.c,v 1.17 2002/10/06 16:24:36 thomas Exp $";
	46	#endif /* not lint */
	47
1815bff5	48	#include <sys/reboot.h>
20e66415 A	49	#include <sys/types.h>
20e66415 A	50	#include <sys/sysctl.h>
1815bff5	51	#include <signal.h>
20e66415	52	#include <err.h>
1815bff5	53	#include <errno.h>
20e66415 A	54	#include <fcntl.h>
	55	#include <util.h>
	56	#include <pwd.h>
1815bff5	57	#include <syslog.h>
1815bff5 A	58	#include <stdio.h>
	59	#include <stdlib.h>
	60	#include <string.h>
20e66415	61	#include <unistd.h>
1815bff5	62
20e66415 A	63	void usage(void);
20e66415 A	64	u_int get_pageins(void);
1815bff5 A	65
	66	int dohalt;
	67
	68	int
20e66415	69	main(int argc, char *argv[])
1815bff5	70	{
1815bff5	71	struct passwd *pw;
20e66415 A	72	int ch, howto, i, fd, kflag, lflag, nflag, qflag, pflag, sverrno;
	73	u_int pageins;
	74	char kernel, p;
	75	const char *user;
1815bff5	76
20e66415	77	if (strstr((p = rindex(argv, '/')) ? p + 1 : argv, "halt")) {
1815bff5 A	78	dohalt = 1;
	79	howto = RB_HALT;
	80	} else
	81	howto = 0;
20e66415 A	82	kflag = lflag = nflag = qflag = 0;
	83	#ifndef __APPLE__
	84	while ((ch = getopt(argc, argv, "dk:lnpq")) != -1)
	85	#else
	86	while ((ch = getopt(argc, argv, "k:lnq")) != -1)
	87	#endif
1815bff5	88	switch(ch) {
20e66415 A	89	#ifndef __APPLE__
	90	case 'd':
	91	howto \|= RB_DUMP;
	92	break;
	93	#endif
	94	case 'k':
	95	kflag = 1;
	96	kernel = optarg;
	97	break;
	98	case 'l':
1815bff5 A	99	lflag = 1;
	100	break;
	101	case 'n':
	102	nflag = 1;
	103	howto \|= RB_NOSYNC;
	104	break;
20e66415 A	105	/* -p is irrelevant on OS X. It does that anyway. */
	106	#ifndef __APPLE__
	107	case 'p':
	108	pflag = 1;
	109	howto \|= RB_POWEROFF;
	110	break;
	111	#endif
1815bff5 A	112	case 'q':
	113	qflag = 1;
	114	break;
	115	case '?':
	116	default:
	117	usage();
	118	}
	119	argc -= optind;
	120	argv += optind;
	121
20e66415 A	122	#ifndef __APPLE__
	123	if ((howto & (RB_DUMP \| RB_HALT)) == (RB_DUMP \| RB_HALT))
	124	errx(1, "cannot dump (-d) when halting; must reboot instead");
	125	#endif
	126	if (geteuid()) {
	127	errno = EPERM;
	128	err(1, NULL);
	129	}
1815bff5 A	130
	131	if (qflag) {
	132	reboot(howto);
20e66415 A	133	err(1, NULL);
	134	}
	135
	136	if (kflag) {
	137	fd = open("/boot/nextboot.conf", O_WRONLY \| O_CREAT, 0444);
	138	if (fd > -1) {
	139	(void)write(fd, "nextboot_enable=\"YES\"\n", 22);
	140	(void)write(fd, "kernel=\"", 8L);
	141	(void)write(fd, kernel, strlen(kernel));
	142	(void)write(fd, "\"\n", 2);
	143	close(fd);
	144	}
1815bff5 A	145	}
	146
	147	/* Log the reboot. */
	148	if (!lflag) {
	149	if ((user = getlogin()) == NULL)
	150	user = (pw = getpwuid(getuid())) ?
	151	pw->pw_name : "???";
	152	if (dohalt) {
	153	openlog("halt", 0, LOG_AUTH \| LOG_CONS);
	154	syslog(LOG_CRIT, "halted by %s", user);
	155	} else {
	156	openlog("reboot", 0, LOG_AUTH \| LOG_CONS);
	157	syslog(LOG_CRIT, "rebooted by %s", user);
	158	}
	159	}
	160	logwtmp("~", "shutdown", "");
	161
	162	/*
	163	* Do a sync early on, so disks start transfers while we're off
	164	* killing processes. Don't worry about writes done before the
	165	* processes die, the reboot system call syncs the disks.
	166	*/
	167	if (!nflag)
	168	sync();
	169
	170	/* Just stop init -- if we fail, we'll restart it. */
	171	if (kill(1, SIGTSTP) == -1)
20e66415	172	err(1, "SIGTSTP init");
1815bff5 A	173
	174	/* Ignore the SIGHUP we get when our parent shell dies. */
	175	(void)signal(SIGHUP, SIG_IGN);
	176
20e66415	177	#ifndef __APPLE__
1815bff5 A	178	/* Send a SIGTERM first, a chance to save the buffers. */
1815bff5 A	179	if (kill(-1, SIGTERM) == -1)
20e66415	180	err(1, "SIGTERM processes");
1815bff5 A	181
	182	/*
	183	* After the processes receive the signal, start the rest of the
	184	* buffers on their way. Wait 5 seconds between the SIGTERM and
20e66415 A	185	* the SIGKILL to give everybody a chance. If there is a lot of
	186	* paging activity then wait longer, up to a maximum of approx
	187	* 60 seconds.
1815bff5 A	188	*/
1815bff5 A	189	sleep(2);
20e66415 A	190	for (i = 0; i < 20; i++) {
	191	pageins = get_pageins();
	192	if (!nflag)
	193	sync();
	194	sleep(3);
	195	if (get_pageins() == pageins)
	196	break;
	197	}
1815bff5 A	198
	199	for (i = 1;; ++i) {
	200	if (kill(-1, SIGKILL) == -1) {
	201	if (errno == ESRCH)
	202	break;
	203	goto restart;
	204	}
	205	if (i > 5) {
	206	(void)fprintf(stderr,
	207	"WARNING: some process(es) wouldn't die\n");
	208	break;
	209	}
	210	(void)sleep(2 * i);
	211	}
	212	#endif
20e66415	213
1815bff5 A	214	reboot(howto);
	215	/* FALLTHROUGH */
	216
	217	restart:
	218	sverrno = errno;
20e66415	219	errx(1, "%s%s", kill(1, SIGHUP) == -1 ? "(can't restart init): " : "",
1815bff5 A	220	strerror(sverrno));
	221	/* NOTREACHED */
	222	}
	223
	224	void
	225	usage()
	226	{
20e66415 A	227	(void)fprintf(stderr, "usage: %s [-dnpq] [-k kernel]\n",
20e66415 A	228	dohalt ? "halt" : "reboot");
1815bff5 A	229	exit(1);
	230	}
	231
20e66415 A	232	u_int
20e66415 A	233	get_pageins()
1815bff5	234	{
20e66415 A	235	u_int pageins;
	236	size_t len;
	237
	238	len = sizeof(pageins);
	239	if (sysctlbyname("vm.stats.vm.v_swappgsin", &pageins, &len, NULL, 0)
	240	!= 0) {
	241	warnx("v_swappgsin");
	242	return (0);
	243	}
	244	return pageins;
1815bff5	245	}