[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 <reboot2.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 (!lflag) {	// shutdown(8) has already checked w/kextd
		if ((errno = reserve_reboot()) && !qflag)
			err(1, "couldn't lock for reboot");
	}
#endif

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

#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_up(bootstrap_port, KEXTD_SERVER_NAME, &kxport);
	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
34d340d7	69	#include <reboot2.h>
b180c247 A	70	#endif
b180c247 A	71
20e66415 A	72	void usage(void);
20e66415 A	73	u_int get_pageins(void);
916eb79e	74	#if defined(__APPLE__) && !TARGET_OS_EMBEDDED
b180c247 A	75	int reserve_reboot(void);
b180c247 A	76	#endif
1815bff5 A	77
	78	int dohalt;
	79
	80	int
20e66415	81	main(int argc, char *argv[])
1815bff5	82	{
1815bff5	83	struct passwd *pw;
34d340d7 A	84	int ch, howto, kflag, lflag, nflag, qflag, uflag;
34d340d7 A	85	char *p;
20e66415	86	const char *user;
34d340d7 A	87	#ifndef __APPLE__
	88	int i, fd, pflag, sverrno;
	89	u_int pageins;
	90	char *kernel;
	91	#endif
1815bff5	92
20e66415	93	if (strstr((p = rindex(argv, '/')) ? p + 1 : argv, "halt")) {
1815bff5 A	94	dohalt = 1;
	95	howto = RB_HALT;
	96	} else
	97	howto = 0;
20e66415 A	98	kflag = lflag = nflag = qflag = 0;
	99	#ifndef __APPLE__
	100	while ((ch = getopt(argc, argv, "dk:lnpq")) != -1)
	101	#else
b180c247	102	while ((ch = getopt(argc, argv, "lnqu")) != -1)
20e66415	103	#endif
1815bff5	104	switch(ch) {
20e66415 A	105	#ifndef __APPLE__
	106	case 'd':
	107	howto \|= RB_DUMP;
	108	break;
20e66415 A	109	case 'k':
	110	kflag = 1;
	111	kernel = optarg;
	112	break;
2fc1e207	113	#endif
20e66415	114	case 'l':
1815bff5 A	115	lflag = 1;
	116	break;
	117	case 'n':
	118	nflag = 1;
	119	howto \|= RB_NOSYNC;
	120	break;
20e66415 A	121	/* -p is irrelevant on OS X. It does that anyway. */
	122	#ifndef __APPLE__
	123	case 'p':
	124	pflag = 1;
	125	howto \|= RB_POWEROFF;
	126	break;
	127	#endif
b180c247 A	128	case 'u':
	129	uflag = 1;
	130	howto \|= RB_UPSDELAY;
	131	break;
1815bff5 A	132	case 'q':
1815bff5 A	133	qflag = 1;
916eb79e	134	howto \|= RB_QUICK;
1815bff5 A	135	break;
	136	case '?':
	137	default:
	138	usage();
	139	}
	140	argc -= optind;
	141	argv += optind;
	142
20e66415 A	143	#ifndef __APPLE__
	144	if ((howto & (RB_DUMP \| RB_HALT)) == (RB_DUMP \| RB_HALT))
	145	errx(1, "cannot dump (-d) when halting; must reboot instead");
	146	#endif
	147	if (geteuid()) {
	148	errno = EPERM;
	149	err(1, NULL);
	150	}
1815bff5	151
916eb79e	152	#if defined(__APPLE__) && !TARGET_OS_EMBEDDED
b180c247 A	153	if (!lflag) { // shutdown(8) has already checked w/kextd
	154	if ((errno = reserve_reboot()) && !qflag)
	155	err(1, "couldn't lock for reboot");
	156	}
	157	#endif
	158
1815bff5	159	if (qflag) {
916eb79e A	160	#ifdef __APPLE__
	161	// launchd(8) handles reboot. This call returns NULL on success.
	162	exit(reboot2(howto) == NULL ? EXIT_SUCCESS : EXIT_FAILURE);
	163	#else /* __APPLE__ */
1815bff5	164	reboot(howto);
916eb79e	165	#endif /* __APPLE__ */
20e66415 A	166	err(1, NULL);
	167	}
	168
2fc1e207	169	#ifndef __APPLE__
20e66415 A	170	if (kflag) {
	171	fd = open("/boot/nextboot.conf", O_WRONLY \| O_CREAT, 0444);
	172	if (fd > -1) {
	173	(void)write(fd, "nextboot_enable=\"YES\"\n", 22);
	174	(void)write(fd, "kernel=\"", 8L);
	175	(void)write(fd, kernel, strlen(kernel));
	176	(void)write(fd, "\"\n", 2);
	177	close(fd);
	178	}
1815bff5	179	}
2fc1e207	180	#endif
1815bff5 A	181
	182	/* Log the reboot. */
	183	if (!lflag) {
	184	if ((user = getlogin()) == NULL)
	185	user = (pw = getpwuid(getuid())) ?
	186	pw->pw_name : "???";
	187	if (dohalt) {
	188	openlog("halt", 0, LOG_AUTH \| LOG_CONS);
b180c247 A	189	syslog(LOG_CRIT, "halted by %s%s", user,
b180c247 A	190	(howto & RB_UPSDELAY) ? " with UPS delay":"");
1815bff5 A	191	} else {
	192	openlog("reboot", 0, LOG_AUTH \| LOG_CONS);
	193	syslog(LOG_CRIT, "rebooted by %s", user);
	194	}
	195	}
	196	logwtmp("~", "shutdown", "");
	197
	198	/*
	199	* Do a sync early on, so disks start transfers while we're off
	200	* killing processes. Don't worry about writes done before the
	201	* processes die, the reboot system call syncs the disks.
	202	*/
	203	if (!nflag)
	204	sync();
	205
34d340d7	206	#ifndef __APPLE__
1815bff5 A	207	/* Just stop init -- if we fail, we'll restart it. */
1815bff5 A	208	if (kill(1, SIGTSTP) == -1)
20e66415	209	err(1, "SIGTSTP init");
34d340d7	210	#endif
1815bff5 A	211
	212	/* Ignore the SIGHUP we get when our parent shell dies. */
	213	(void)signal(SIGHUP, SIG_IGN);
	214
20e66415	215	#ifndef __APPLE__
1815bff5 A	216	/* Send a SIGTERM first, a chance to save the buffers. */
1815bff5 A	217	if (kill(-1, SIGTERM) == -1)
20e66415	218	err(1, "SIGTERM processes");
1815bff5 A	219
	220	/*
	221	* After the processes receive the signal, start the rest of the
	222	* buffers on their way. Wait 5 seconds between the SIGTERM and
20e66415 A	223	* the SIGKILL to give everybody a chance. If there is a lot of
	224	* paging activity then wait longer, up to a maximum of approx
	225	* 60 seconds.
1815bff5 A	226	*/
1815bff5 A	227	sleep(2);
20e66415 A	228	for (i = 0; i < 20; i++) {
	229	pageins = get_pageins();
	230	if (!nflag)
	231	sync();
	232	sleep(3);
	233	if (get_pageins() == pageins)
	234	break;
	235	}
1815bff5 A	236
	237	for (i = 1;; ++i) {
	238	if (kill(-1, SIGKILL) == -1) {
	239	if (errno == ESRCH)
	240	break;
	241	goto restart;
	242	}
	243	if (i > 5) {
	244	(void)fprintf(stderr,
	245	"WARNING: some process(es) wouldn't die\n");
	246	break;
	247	}
	248	(void)sleep(2 * i);
	249	}
	250	#endif
20e66415	251
34d340d7 A	252	#ifdef __APPLE__
	253	// launchd(8) handles reboot. This call returns NULL on success.
	254	exit(reboot2(howto) == NULL ? EXIT_SUCCESS : EXIT_FAILURE);
	255	#else /* __APPLE__ */
1815bff5 A	256	reboot(howto);
	257	/* FALLTHROUGH */
	258
	259	restart:
	260	sverrno = errno;
20e66415	261	errx(1, "%s%s", kill(1, SIGHUP) == -1 ? "(can't restart init): " : "",
1815bff5 A	262	strerror(sverrno));
1815bff5 A	263	/* NOTREACHED */
34d340d7	264	#endif /* __APPLE__ */
1815bff5 A	265	}
	266
	267	void
	268	usage()
	269	{
2fc1e207	270	#ifndef __APPLE__
20e66415	271	(void)fprintf(stderr, "usage: %s [-dnpq] [-k kernel]\n",
2fc1e207 A	272	#else
	273	(void)fprintf(stderr, "usage: %s [-lnq]\n",
	274	#endif
20e66415	275	dohalt ? "halt" : "reboot");
1815bff5 A	276	exit(1);
	277	}
	278
20e66415 A	279	u_int
20e66415 A	280	get_pageins()
1815bff5	281	{
20e66415 A	282	u_int pageins;
	283	size_t len;
	284
	285	len = sizeof(pageins);
	286	if (sysctlbyname("vm.stats.vm.v_swappgsin", &pageins, &len, NULL, 0)
	287	!= 0) {
	288	warnx("v_swappgsin");
	289	return (0);
	290	}
	291	return pageins;
1815bff5	292	}
b180c247	293
916eb79e	294	#if defined(__APPLE__) && !TARGET_OS_EMBEDDED
34d340d7	295	// XX this routine is also in shutdown.tproj; it would be nice to share
b180c247	296
34d340d7	297	#define WAITFORLOCK 1
b180c247 A	298	/*
	299	* contact kextd to lock for reboot
	300	*/
	301	int
	302	reserve_reboot()
	303	{
34d340d7	304	int rval = ELAST + 1;
b180c247	305	kern_return_t macherr = KERN_FAILURE;
34d340d7 A	306	mach_port_t kxport, tport = MACH_PORT_NULL, myport = MACH_PORT_NULL;
	307	int busyStatus = ELAST + 1;
	308	mountpoint_t busyVol;
b180c247	309
34d340d7	310	macherr = bootstrap_look_up(bootstrap_port, KEXTD_SERVER_NAME, &kxport);
b180c247 A	311	if (macherr) goto finish;
	312
	313	// allocate a port to pass to kextd (in case we die)
34d340d7 A	314	tport = mach_task_self();
34d340d7 A	315	if (tport == MACH_PORT_NULL) goto finish;
b180c247 A	316	macherr = mach_port_allocate(tport, MACH_PORT_RIGHT_RECEIVE, &myport);
	317	if (macherr) goto finish;
	318
34d340d7 A	319	// try to lock for reboot
	320	macherr = kextmanager_lock_reboot(kxport, myport, !WAITFORLOCK, busyVol,
	321	&busyStatus);
	322	if (macherr) goto finish;
b180c247	323
34d340d7 A	324	if (busyStatus == EBUSY) {
	325	warnx("%s is busy updating; waiting for lock", busyVol);
	326	macherr = kextmanager_lock_reboot(kxport, myport, WAITFORLOCK,
	327	busyVol, &busyStatus);
	328	if (macherr) goto finish;
	329	}
b180c247	330
34d340d7 A	331	if (busyStatus == EALREADY) {
34d340d7 A	332	// reboot already in progress
b180c247	333	rval = 0;
34d340d7 A	334	} else {
34d340d7 A	335	rval = busyStatus;
b180c247	336	}
34d340d7 A	337
	338	finish:
	339	// in general, we want to err on the side of allowing the reboot
	340	if (macherr) {
	341	if (macherr != BOOTSTRAP_UNKNOWN_SERVICE)
	342	warnx("WARNING: couldn't lock kext manager for reboot: %s",
	343	mach_error_string(macherr));
	344	rval = 0;
	345	}
	346	// unless we got the lock, clean up our port
	347	if (busyStatus != 0 && myport != MACH_PORT_NULL)
b180c247	348	mach_port_mod_refs(tport, myport, MACH_PORT_RIGHT_RECEIVE, -1);
b180c247 A	349
	350	return rval;
	351	}
	352	#endif