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

/*
 * Copyright (c) 1980, 1986, 1993
 *	The Regents of the University of California.  All rights reserved.
 * Portions copyright (c) 2007 Apple Inc.  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. 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>

#ifdef __APPLE__
#include <TargetConditionals.h>
#if !TARGET_OS_EMBEDDED
#include "kextmanager.h"
#include <IOKit/kext/kextmanager_types.h>
#endif
#include <mach/mach_port.h>		// allocate
#include <mach/mach.h>			// task_self, etc
#include <servers/bootstrap.h>	// bootstrap
#include <bootstrap_priv.h>
#include <reboot2.h>
#include <utmpx.h>
#include <sys/time.h>
#endif

void usage(void);
u_int get_pageins(void);
#if defined(__APPLE__) && !TARGET_OS_EMBEDDED
int reserve_reboot(void);
#endif

int dohalt;

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

	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, "lnqu")) != -1)
#endif
		switch(ch) {
#ifndef __APPLE__
		case 'd':
			howto |= RB_DUMP;
			break;
		case 'k':
			kflag = 1;
			kernel = optarg;
			break;
#endif
		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 'u':
			uflag = 1;
			howto |= RB_UPSDELAY;
			break;
		case 'q':
			qflag = 1;
			howto |= RB_QUICK;
			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 defined(__APPLE__) && !TARGET_OS_EMBEDDED
	if (!qflag && !lflag) {	// shutdown(8) has already checked w/kextd
		if ((errno = reserve_reboot()))
			err(1, "couldn't lock for reboot");
	}
#endif

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

#ifndef __APPLE__
	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);
		}
	}
#endif

	/* 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%s", user, 
			     (howto & RB_UPSDELAY) ? " with UPS delay":"");
		} else {
			openlog("reboot", 0, LOG_AUTH | LOG_CONS);
			syslog(LOG_CRIT, "rebooted by %s", user);
		}
	}
#if defined(__APPLE__) 
	{
		struct utmpx utx;
		bzero(&utx, sizeof(utx));
		utx.ut_type = SHUTDOWN_TIME;
		gettimeofday(&utx.ut_tv, NULL);
		pututxline(&utx);

		int newvalue = 1;
		sysctlbyname("kern.willshutdown", NULL, NULL, &newvalue, sizeof(newvalue));
	}
#else
	logwtmp("~", "shutdown", "");
#endif

	/*
	 * 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();

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

	/* 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

#ifdef __APPLE__
	// launchd(8) handles reboot.  This call returns NULL on success.
	exit(reboot2(howto) == NULL ? EXIT_SUCCESS : EXIT_FAILURE);
#else /* __APPLE__ */
	reboot(howto);
	/* FALLTHROUGH */

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

void
usage()
{
#ifndef __APPLE__
	(void)fprintf(stderr, "usage: %s [-dnpq] [-k kernel]\n",
#else
	(void)fprintf(stderr, "usage: %s [-lnq]\n",
#endif
	    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;
}

#if defined(__APPLE__) && !TARGET_OS_EMBEDDED
// XX this routine is also in shutdown.tproj; it would be nice to share

#define WAITFORLOCK 1
/*
 * contact kextd to lock for reboot
 */
int
reserve_reboot()
{
	int rval = ELAST + 1;
	kern_return_t macherr = KERN_FAILURE;
	mach_port_t kxport, tport = MACH_PORT_NULL, myport = MACH_PORT_NULL;
	int busyStatus = ELAST + 1;
	mountpoint_t busyVol;

	macherr = bootstrap_look_up2(bootstrap_port, KEXTD_SERVER_NAME, &kxport, 0, BOOTSTRAP_PRIVILEGED_SERVER);
	if (macherr)  goto finish;

	// allocate a port to pass to kextd (in case we die)
	tport = mach_task_self();
	if (tport == MACH_PORT_NULL)  goto finish;
	macherr = mach_port_allocate(tport, MACH_PORT_RIGHT_RECEIVE, &myport);
	if (macherr)  goto finish;

	// try to lock for reboot
	macherr = kextmanager_lock_reboot(kxport, myport, !WAITFORLOCK, busyVol,
                                      &busyStatus);
	if (macherr)  goto finish;

	if (busyStatus == EBUSY) {
		warnx("%s is busy updating; waiting for lock", busyVol);
		macherr = kextmanager_lock_reboot(kxport, myport, WAITFORLOCK,
										  busyVol, &busyStatus);
		if (macherr)	goto finish;
	}

	if (busyStatus == EALREADY) {
		// reboot already in progress
		rval = 0;
	} else {
		rval = busyStatus;
	}

finish:
	// in general, we want to err on the side of allowing the reboot
	if (macherr) {
		if (macherr != BOOTSTRAP_UNKNOWN_SERVICE)
			warnx("WARNING: couldn't lock kext manager for reboot: %s",
					mach_error_string(macherr));
		rval = 0;
	} 
	// unless we got the lock, clean up our port
	if (busyStatus != 0 && myport != MACH_PORT_NULL)
		mach_port_mod_refs(tport, myport, MACH_PORT_RIGHT_RECEIVE, -1);

	return rval;
}
#endif
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.
34d340d7	4	* Portions copyright (c) 2007 Apple Inc. All rights reserved.
1815bff5 A	5	*
	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions
	8	* are met:
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions and the following disclaimer.
	11	* 2. Redistributions in binary form must reproduce the above copyright
	12	* notice, this list of conditions and the following disclaimer in the
	13	* documentation and/or other materials provided with the distribution.
34d340d7	14	* 3. Neither the name of the University nor the names of its contributors
1815bff5 A	15	* may be used to endorse or promote products derived from this software
	16	* without specific prior written permission.
	17	*
	18	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	19	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	20	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	21	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	22	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	23	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	24	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	25	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	26	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	27	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	28	* SUCH DAMAGE.
	29	*/
	30
20e66415 A	31	#ifndef lint
	32	static const char copyright[] =
	33	"@(#) Copyright (c) 1980, 1986, 1993\n\
	34	The Regents of the University of California. All rights reserved.\n";
	35	#endif /* not lint */
	36
	37	#ifndef lint
	38	#if 0
	39	static char sccsid[] = "@(#)reboot.c 8.1 (Berkeley) 6/5/93";
	40	#endif
	41	static const char rcsid[] =
	42	"$FreeBSD: src/sbin/reboot/reboot.c,v 1.17 2002/10/06 16:24:36 thomas Exp $";
	43	#endif /* not lint */
	44
1815bff5	45	#include <sys/reboot.h>
20e66415 A	46	#include <sys/types.h>
20e66415 A	47	#include <sys/sysctl.h>
1815bff5	48	#include <signal.h>
20e66415	49	#include <err.h>
1815bff5	50	#include <errno.h>
20e66415 A	51	#include <fcntl.h>
	52	#include <util.h>
	53	#include <pwd.h>
1815bff5	54	#include <syslog.h>
1815bff5 A	55	#include <stdio.h>
	56	#include <stdlib.h>
	57	#include <string.h>
20e66415	58	#include <unistd.h>
1815bff5	59
b180c247	60	#ifdef __APPLE__
916eb79e A	61	#include <TargetConditionals.h>
916eb79e A	62	#if !TARGET_OS_EMBEDDED
b180c247 A	63	#include "kextmanager.h"
b180c247 A	64	#include <IOKit/kext/kextmanager_types.h>
916eb79e	65	#endif
b180c247 A	66	#include <mach/mach_port.h> // allocate
	67	#include <mach/mach.h> // task_self, etc
	68	#include <servers/bootstrap.h> // bootstrap
fc6d9e4b	69	#include <bootstrap_priv.h>
34d340d7	70	#include <reboot2.h>
ef8ad44b A	71	#include <utmpx.h>
ef8ad44b A	72	#include <sys/time.h>
b180c247 A	73	#endif
b180c247 A	74
20e66415 A	75	void usage(void);
20e66415 A	76	u_int get_pageins(void);
916eb79e	77	#if defined(__APPLE__) && !TARGET_OS_EMBEDDED
b180c247 A	78	int reserve_reboot(void);
b180c247 A	79	#endif
1815bff5 A	80
	81	int dohalt;
	82
	83	int
20e66415	84	main(int argc, char *argv[])
1815bff5	85	{
1815bff5	86	struct passwd *pw;
34d340d7 A	87	int ch, howto, kflag, lflag, nflag, qflag, uflag;
34d340d7 A	88	char *p;
20e66415	89	const char *user;
34d340d7 A	90	#ifndef __APPLE__
	91	int i, fd, pflag, sverrno;
	92	u_int pageins;
	93	char *kernel;
	94	#endif
1815bff5	95
20e66415	96	if (strstr((p = rindex(argv, '/')) ? p + 1 : argv, "halt")) {
1815bff5 A	97	dohalt = 1;
	98	howto = RB_HALT;
	99	} else
	100	howto = 0;
20e66415 A	101	kflag = lflag = nflag = qflag = 0;
	102	#ifndef __APPLE__
	103	while ((ch = getopt(argc, argv, "dk:lnpq")) != -1)
	104	#else
b180c247	105	while ((ch = getopt(argc, argv, "lnqu")) != -1)
20e66415	106	#endif
1815bff5	107	switch(ch) {
20e66415 A	108	#ifndef __APPLE__
	109	case 'd':
	110	howto \|= RB_DUMP;
	111	break;
20e66415 A	112	case 'k':
	113	kflag = 1;
	114	kernel = optarg;
	115	break;
2fc1e207	116	#endif
20e66415	117	case 'l':
1815bff5 A	118	lflag = 1;
	119	break;
	120	case 'n':
	121	nflag = 1;
	122	howto \|= RB_NOSYNC;
	123	break;
20e66415 A	124	/* -p is irrelevant on OS X. It does that anyway. */
	125	#ifndef __APPLE__
	126	case 'p':
	127	pflag = 1;
	128	howto \|= RB_POWEROFF;
	129	break;
	130	#endif
b180c247 A	131	case 'u':
	132	uflag = 1;
	133	howto \|= RB_UPSDELAY;
	134	break;
1815bff5 A	135	case 'q':
1815bff5 A	136	qflag = 1;
916eb79e	137	howto \|= RB_QUICK;
1815bff5 A	138	break;
	139	case '?':
	140	default:
	141	usage();
	142	}
	143	argc -= optind;
	144	argv += optind;
	145
20e66415 A	146	#ifndef __APPLE__
	147	if ((howto & (RB_DUMP \| RB_HALT)) == (RB_DUMP \| RB_HALT))
	148	errx(1, "cannot dump (-d) when halting; must reboot instead");
	149	#endif
	150	if (geteuid()) {
	151	errno = EPERM;
	152	err(1, NULL);
	153	}
1815bff5	154
916eb79e	155	#if defined(__APPLE__) && !TARGET_OS_EMBEDDED
ef8ad44b A	156	if (!qflag && !lflag) { // shutdown(8) has already checked w/kextd
ef8ad44b A	157	if ((errno = reserve_reboot()))
b180c247 A	158	err(1, "couldn't lock for reboot");
	159	}
	160	#endif
	161
1815bff5 A	162	if (qflag) {
1815bff5 A	163	reboot(howto);
20e66415 A	164	err(1, NULL);
	165	}
	166
2fc1e207	167	#ifndef __APPLE__
20e66415 A	168	if (kflag) {
	169	fd = open("/boot/nextboot.conf", O_WRONLY \| O_CREAT, 0444);
	170	if (fd > -1) {
	171	(void)write(fd, "nextboot_enable=\"YES\"\n", 22);
	172	(void)write(fd, "kernel=\"", 8L);
	173	(void)write(fd, kernel, strlen(kernel));
	174	(void)write(fd, "\"\n", 2);
	175	close(fd);
	176	}
1815bff5	177	}
2fc1e207	178	#endif
1815bff5 A	179
	180	/* Log the reboot. */
	181	if (!lflag) {
	182	if ((user = getlogin()) == NULL)
	183	user = (pw = getpwuid(getuid())) ?
	184	pw->pw_name : "???";
	185	if (dohalt) {
	186	openlog("halt", 0, LOG_AUTH \| LOG_CONS);
b180c247 A	187	syslog(LOG_CRIT, "halted by %s%s", user,
b180c247 A	188	(howto & RB_UPSDELAY) ? " with UPS delay":"");
1815bff5 A	189	} else {
	190	openlog("reboot", 0, LOG_AUTH \| LOG_CONS);
	191	syslog(LOG_CRIT, "rebooted by %s", user);
	192	}
	193	}
ef8ad44b A	194	#if defined(__APPLE__)
	195	{
	196	struct utmpx utx;
	197	bzero(&utx, sizeof(utx));
fc6d9e4b	198	utx.ut_type = SHUTDOWN_TIME;
ef8ad44b A	199	gettimeofday(&utx.ut_tv, NULL);
	200	pututxline(&utx);
	201
	202	int newvalue = 1;
	203	sysctlbyname("kern.willshutdown", NULL, NULL, &newvalue, sizeof(newvalue));
	204	}
	205	#else
1815bff5	206	logwtmp("~", "shutdown", "");
ef8ad44b	207	#endif
1815bff5 A	208
	209	/*
	210	* Do a sync early on, so disks start transfers while we're off
	211	* killing processes. Don't worry about writes done before the
	212	* processes die, the reboot system call syncs the disks.
	213	*/
	214	if (!nflag)
	215	sync();
	216
34d340d7	217	#ifndef __APPLE__
1815bff5 A	218	/* Just stop init -- if we fail, we'll restart it. */
1815bff5 A	219	if (kill(1, SIGTSTP) == -1)
20e66415	220	err(1, "SIGTSTP init");
34d340d7	221	#endif
1815bff5 A	222
	223	/* Ignore the SIGHUP we get when our parent shell dies. */
	224	(void)signal(SIGHUP, SIG_IGN);
	225
20e66415	226	#ifndef __APPLE__
1815bff5 A	227	/* Send a SIGTERM first, a chance to save the buffers. */
1815bff5 A	228	if (kill(-1, SIGTERM) == -1)
20e66415	229	err(1, "SIGTERM processes");
1815bff5 A	230
	231	/*
	232	* After the processes receive the signal, start the rest of the
	233	* buffers on their way. Wait 5 seconds between the SIGTERM and
20e66415 A	234	* the SIGKILL to give everybody a chance. If there is a lot of
	235	* paging activity then wait longer, up to a maximum of approx
	236	* 60 seconds.
1815bff5 A	237	*/
1815bff5 A	238	sleep(2);
20e66415 A	239	for (i = 0; i < 20; i++) {
	240	pageins = get_pageins();
	241	if (!nflag)
	242	sync();
	243	sleep(3);
	244	if (get_pageins() == pageins)
	245	break;
	246	}
1815bff5 A	247
	248	for (i = 1;; ++i) {
	249	if (kill(-1, SIGKILL) == -1) {
	250	if (errno == ESRCH)
	251	break;
	252	goto restart;
	253	}
	254	if (i > 5) {
	255	(void)fprintf(stderr,
	256	"WARNING: some process(es) wouldn't die\n");
	257	break;
	258	}
	259	(void)sleep(2 * i);
	260	}
	261	#endif
20e66415	262
34d340d7 A	263	#ifdef __APPLE__
	264	// launchd(8) handles reboot. This call returns NULL on success.
	265	exit(reboot2(howto) == NULL ? EXIT_SUCCESS : EXIT_FAILURE);
	266	#else /* __APPLE__ */
1815bff5 A	267	reboot(howto);
	268	/* FALLTHROUGH */
	269
	270	restart:
	271	sverrno = errno;
20e66415	272	errx(1, "%s%s", kill(1, SIGHUP) == -1 ? "(can't restart init): " : "",
1815bff5 A	273	strerror(sverrno));
1815bff5 A	274	/* NOTREACHED */
34d340d7	275	#endif /* __APPLE__ */
1815bff5 A	276	}
	277
	278	void
	279	usage()
	280	{
2fc1e207	281	#ifndef __APPLE__
20e66415	282	(void)fprintf(stderr, "usage: %s [-dnpq] [-k kernel]\n",
2fc1e207 A	283	#else
	284	(void)fprintf(stderr, "usage: %s [-lnq]\n",
	285	#endif
20e66415	286	dohalt ? "halt" : "reboot");
1815bff5 A	287	exit(1);
	288	}
	289
20e66415 A	290	u_int
20e66415 A	291	get_pageins()
1815bff5	292	{
20e66415 A	293	u_int pageins;
	294	size_t len;
	295
	296	len = sizeof(pageins);
	297	if (sysctlbyname("vm.stats.vm.v_swappgsin", &pageins, &len, NULL, 0)
	298	!= 0) {
	299	warnx("v_swappgsin");
	300	return (0);
	301	}
	302	return pageins;
1815bff5	303	}
b180c247	304
916eb79e	305	#if defined(__APPLE__) && !TARGET_OS_EMBEDDED
34d340d7	306	// XX this routine is also in shutdown.tproj; it would be nice to share
b180c247	307
34d340d7	308	#define WAITFORLOCK 1
b180c247 A	309	/*
	310	* contact kextd to lock for reboot
	311	*/
	312	int
	313	reserve_reboot()
	314	{
34d340d7	315	int rval = ELAST + 1;
b180c247	316	kern_return_t macherr = KERN_FAILURE;
34d340d7 A	317	mach_port_t kxport, tport = MACH_PORT_NULL, myport = MACH_PORT_NULL;
	318	int busyStatus = ELAST + 1;
	319	mountpoint_t busyVol;
b180c247	320
fc6d9e4b	321	macherr = bootstrap_look_up2(bootstrap_port, KEXTD_SERVER_NAME, &kxport, 0, BOOTSTRAP_PRIVILEGED_SERVER);
b180c247 A	322	if (macherr) goto finish;
	323
	324	// allocate a port to pass to kextd (in case we die)
34d340d7 A	325	tport = mach_task_self();
34d340d7 A	326	if (tport == MACH_PORT_NULL) goto finish;
b180c247 A	327	macherr = mach_port_allocate(tport, MACH_PORT_RIGHT_RECEIVE, &myport);
	328	if (macherr) goto finish;
	329
34d340d7 A	330	// try to lock for reboot
	331	macherr = kextmanager_lock_reboot(kxport, myport, !WAITFORLOCK, busyVol,
	332	&busyStatus);
	333	if (macherr) goto finish;
b180c247	334
34d340d7 A	335	if (busyStatus == EBUSY) {
	336	warnx("%s is busy updating; waiting for lock", busyVol);
	337	macherr = kextmanager_lock_reboot(kxport, myport, WAITFORLOCK,
	338	busyVol, &busyStatus);
	339	if (macherr) goto finish;
	340	}
b180c247	341
34d340d7 A	342	if (busyStatus == EALREADY) {
34d340d7 A	343	// reboot already in progress
b180c247	344	rval = 0;
34d340d7 A	345	} else {
34d340d7 A	346	rval = busyStatus;
b180c247	347	}
34d340d7 A	348
	349	finish:
	350	// in general, we want to err on the side of allowing the reboot
	351	if (macherr) {
	352	if (macherr != BOOTSTRAP_UNKNOWN_SERVICE)
	353	warnx("WARNING: couldn't lock kext manager for reboot: %s",
	354	mach_error_string(macherr));
	355	rval = 0;
	356	}
	357	// unless we got the lock, clean up our port
	358	if (busyStatus != 0 && myport != MACH_PORT_NULL)
b180c247	359	mach_port_mod_refs(tport, myport, MACH_PORT_RIGHT_RECEIVE, -1);
b180c247 A	360
	361	return rval;
	362	}
	363	#endif