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

/*
 * Copyright (c) 1988, 1990, 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) 1988, 1990, 1993\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)shutdown.c	8.4 (Berkeley) 4/28/95";
#endif
static const char rcsid[] =
  "$FreeBSD: src/sbin/shutdown/shutdown.c,v 1.23 2002/03/21 13:20:48 imp Exp $";
#endif /* not lint */

#include <sys/param.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/syslog.h>

#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <pwd.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <errno.h>
#include <bsm/libbsm.h>
#include <bsm/audit_uevents.h>


#include "pathnames.h"

#ifdef __APPLE__
#define __unused
#endif

#ifdef DEBUG
#undef _PATH_NOLOGIN
#define	_PATH_NOLOGIN	"./nologin"
#endif

#define	H		*60*60
#define	M		*60
#define	S		*1
#define	NOLOG_TIME	5*60
struct interval {
	int timeleft, timetowait;
} tlist[] = {
	{ 10 H,  5 H },
	{  5 H,  3 H },
	{  2 H,  1 H },
	{  1 H, 30 M },
	{ 30 M, 10 M },
	{ 20 M, 10 M },
	{ 10 M,  5 M },
	{  5 M,  3 M },
	{  2 M,  1 M },
	{  1 M, 30 S },
	{ 30 S, 30 S },
	{  0  ,  0   }
};
#undef H
#undef M
#undef S

static time_t offset, shuttime;
static int dohalt, dopower, doreboot, killflg, mbuflen, oflag = 1;
static char mbuf[BUFSIZ];
static const char *nosync, *whom;

void badtime(void);
void die_you_gravy_sucking_pig_dog(void);
void finish(int);
void getoffset(char *);
void loop(void);
void nolog(void);
void timeout(int);
void timewarn(int);
void usage(const char *);
int audit_shutdown(int);

int
main(argc, argv)
	int argc;
	char *argv[];
{
	char *p, *endp;
	struct passwd *pw;
	int arglen, ch, len, readstdin;

#ifndef DEBUG
	if (geteuid())
		errx(1, "NOT super-user");
#endif
	nosync = NULL;
	readstdin = 0;
#ifndef __APPLE__
	while ((ch = getopt(argc, argv, "-hknopr")) != -1)
#else
	while ((ch = getopt(argc, argv, "-hknor")) != -1)
#endif
		switch (ch) {
		case '-':
			readstdin = 1;
			break;
		case 'h':
			dohalt = 1;
			break;
		case 'k':
			killflg = 1;
			break;
		case 'n':
			nosync = "-n";
			break;
		case 'o':
			oflag = 1;
			break;
#ifndef __APPLE__
		case 'p':
			dopower = 1;
			break;
#endif
		case 'r':
			doreboot = 1;
			break;
		case '?':
		default:
			usage((char *)NULL);
		}
	argc -= optind;
	argv += optind;

	if (argc < 1)
		usage((char *)NULL);

#ifndef __APPLE__
	if (killflg + doreboot + dohalt + dopower > 1)
		usage("incompatible switches -h, -k, -p and -r");

	if (oflag && !(dohalt || dopower || doreboot))
		usage("-o requires -h, -p or -r");
#else
	if (killflg + doreboot + dohalt > 1)
		usage("incompatible switches -h, -k, and -r");

	if (oflag && !(dohalt || doreboot))
		usage("-o requires -h or -r");
#endif

	if (nosync != NULL && !oflag)
		usage("-n requires -o");

	getoffset(*argv++);

	if (*argv) {
		for (p = mbuf, len = sizeof(mbuf); *argv; ++argv) {
			arglen = strlen(*argv);
			if ((len -= arglen) <= 2)
				break;
			if (p != mbuf)
				*p++ = ' ';
			memmove(p, *argv, arglen);
			p += arglen;
		}
		*p = '\n';
		*++p = '\0';
	}

	if (readstdin) {
		p = mbuf;
		endp = mbuf + sizeof(mbuf) - 2;
		for (;;) {
			if (!fgets(p, endp - p + 1, stdin))
				break;
			for (; *p &&  p < endp; ++p);
			if (p == endp) {
				*p = '\n';
				*++p = '\0';
				break;
			}
		}
	}
	mbuflen = strlen(mbuf);

	if (offset)
		(void)printf("Shutdown at %.24s.\n", ctime(&shuttime));
	else
		(void)printf("Shutdown NOW!\n");

	if (!(whom = getlogin()))
		whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";


#ifdef DEBUG
	audit_shutdown(0);
	(void)putc('\n', stdout);
#else
	(void)setpriority(PRIO_PROCESS, 0, PRIO_MIN);
	{
		int forkpid;

		forkpid = fork();
		if (forkpid == -1) {
			audit_shutdown(1);
			err(1, "fork");
		}
		if (forkpid) {
			errx(0, "[pid %d]", forkpid);
		}
	}
	audit_shutdown(0);
	setsid();
#endif
	openlog("shutdown", LOG_CONS, LOG_AUTH);
	loop();
	return(0);
}

void
loop()
{
	struct interval *tp;
	u_int sltime;
	int logged;

	if (offset <= NOLOG_TIME) {
		logged = 1;
		nolog();
	}
	else
		logged = 0;
	tp = tlist;
	if (tp->timeleft < offset)
		(void)sleep((u_int)(offset - tp->timeleft));
	else {
		while (tp->timeleft && offset < tp->timeleft)
			++tp;
		/*
		 * Warn now, if going to sleep more than a fifth of
		 * the next wait time.
		 */
		if ((sltime = offset - tp->timeleft)) {
			if (sltime > (u_int)(tp->timetowait / 5))
				timewarn(offset);
			(void)sleep(sltime);
		}
	}
	for (;; ++tp) {
		timewarn(tp->timeleft);
		if (!logged && tp->timeleft <= NOLOG_TIME) {
			logged = 1;
			nolog();
		}
		(void)sleep((u_int)tp->timetowait);
		if (!tp->timeleft)
			break;
	}
	die_you_gravy_sucking_pig_dog();
}

static jmp_buf alarmbuf;

static const char *restricted_environ[] = {
	"PATH=" _PATH_STDPATH,
	NULL
};

void
timewarn(timeleft)
	int timeleft;
{
	static int first;
	static char hostname[MAXHOSTNAMELEN + 1];
	FILE *pf;
	char wcmd[MAXPATHLEN + 4];
	extern const char **environ;

	if (!first++)
		(void)gethostname(hostname, sizeof(hostname));

	/* undoc -n option to wall suppresses normal wall banner */
	(void)snprintf(wcmd, sizeof(wcmd), "%s -n", _PATH_WALL);
	environ = restricted_environ;
	if (!(pf = popen(wcmd, "w"))) {
		syslog(LOG_ERR, "shutdown: can't find %s: %m", _PATH_WALL);
		return;
	}

	(void)fprintf(pf,
	    "\007*** %sSystem shutdown message from %s@%s ***\007\n",
	    timeleft ? "": "FINAL ", whom, hostname);

	if (timeleft > 10*60)
		(void)fprintf(pf, "System going down at %5.5s\n\n",
		    ctime(&shuttime) + 11);
	else if (timeleft > 59)
		(void)fprintf(pf, "System going down in %d minute%s\n\n",
		    timeleft / 60, (timeleft > 60) ? "s" : "");
	else if (timeleft)
		(void)fprintf(pf, "System going down in 30 seconds\n\n");
	else
		(void)fprintf(pf, "System going down IMMEDIATELY\n\n");

	if (mbuflen)
		(void)fwrite(mbuf, sizeof(*mbuf), mbuflen, pf);

	/*
	 * play some games, just in case wall doesn't come back
	 * probably unnecessary, given that wall is careful.
	 */
	if (!setjmp(alarmbuf)) {
		(void)signal(SIGALRM, timeout);
		(void)alarm((u_int)30);
		(void)pclose(pf);
		(void)alarm((u_int)0);
		(void)signal(SIGALRM, SIG_DFL);
	}
}

void
timeout(signo)
	int signo __unused;
{
	longjmp(alarmbuf, 1);
}

void
die_you_gravy_sucking_pig_dog()
{
	char *empty_environ[] = { NULL };

	syslog(LOG_NOTICE, "%s by %s: %s",
#ifndef __APPLE__
	    doreboot ? "reboot" : dohalt ? "halt" : dopower ? "power-down" : 
#else
	    doreboot ? "reboot" : dohalt ? "halt" : 
#endif
	    "shutdown", whom, mbuf);
	(void)sleep(2);

	(void)printf("\r\nSystem shutdown time has arrived\007\007\r\n");
	if (killflg) {
		(void)printf("\rbut you'll have to do it yourself\r\n");
		exit(0);
	}
#ifdef DEBUG
	if (doreboot)
		(void)printf("reboot");
	else if (dohalt)
		(void)printf("halt");
#ifndef __APPLE__
	else if (dopower)
		(void)printf("power-down");
#endif
	if (nosync != NULL)
		(void)printf(" no sync");
	(void)printf("\nkill -HUP 1\n");
#else
	if (!oflag) {
		(void)kill(1, doreboot ? SIGINT :	/* reboot */
			      dohalt ? SIGUSR1 :	/* halt */
#ifndef __APPLE__
			      dopower ? SIGUSR2 :	/* power-down */
#endif
			      SIGTERM);			/* single-user */
	} else {
		if (doreboot) {
			execle(_PATH_REBOOT, "reboot", "-l", nosync, 
				(char *)NULL, empty_environ);
			syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
				_PATH_REBOOT);
			warn(_PATH_REBOOT);
		}
		else if (dohalt) {
			execle(_PATH_HALT, "halt", "-l", nosync,
				(char *)NULL, empty_environ);
			syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
				_PATH_HALT);
			warn(_PATH_HALT);
		}
#ifndef __APPLE__
		else if (dopower) {
			execle(_PATH_HALT, "halt", "-l", "-p", nosync,
				(char *)NULL, empty_environ);
			syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
				_PATH_HALT);
			warn(_PATH_HALT);
		}
#endif
		(void)kill(1, SIGTERM);		/* to single-user */
	}
#endif
	finish(0);
}

#define	ATOI2(p)	(p[0] - '0') * 10 + (p[1] - '0'); p += 2;

void
getoffset(timearg)
	char *timearg;
{
	struct tm *lt;
	char *p;
	time_t now;
	int this_year;

	(void)time(&now);

	if (!strcasecmp(timearg, "now")) {		/* now */
		offset = 0;
		shuttime = now;
		return;
	}

	if (*timearg == '+') {				/* +minutes */
		if (!isdigit(*++timearg))
			badtime();
		if ((offset = atoi(timearg) * 60) < 0)
			badtime();
		shuttime = now + offset;
		return;
	}

	/* handle hh:mm by getting rid of the colon */
	for (p = timearg; *p; ++p)
		if (!isascii(*p) || !isdigit(*p)) {
			if (*p == ':' && strlen(p) == 3) {
				p[0] = p[1];
				p[1] = p[2];
				p[2] = '\0';
			}
			else
				badtime();
		}

	unsetenv("TZ");					/* OUR timezone */
	lt = localtime(&now);				/* current time val */

	switch(strlen(timearg)) {
	case 10:
		this_year = lt->tm_year;
		lt->tm_year = ATOI2(timearg);
		/*
		 * check if the specified year is in the next century.
		 * allow for one year of user error as many people will
		 * enter n - 1 at the start of year n.
		 */
		if (lt->tm_year < (this_year % 100) - 1)
			lt->tm_year += 100;
		/* adjust for the year 2000 and beyond */
		lt->tm_year += (this_year - (this_year % 100));
		/* FALLTHROUGH */
	case 8:
		lt->tm_mon = ATOI2(timearg);
		if (--lt->tm_mon < 0 || lt->tm_mon > 11)
			badtime();
		/* FALLTHROUGH */
	case 6:
		lt->tm_mday = ATOI2(timearg);
		if (lt->tm_mday < 1 || lt->tm_mday > 31)
			badtime();
		/* FALLTHROUGH */
	case 4:
		lt->tm_hour = ATOI2(timearg);
		if (lt->tm_hour < 0 || lt->tm_hour > 23)
			badtime();
		lt->tm_min = ATOI2(timearg);
		if (lt->tm_min < 0 || lt->tm_min > 59)
			badtime();
		lt->tm_sec = 0;
		if ((shuttime = mktime(lt)) == -1)
			badtime();
		if ((offset = shuttime - now) < 0)
			errx(1, "that time is already past.");
		break;
	default:
		badtime();
	}
}

#define	NOMSG	"\n\nNO LOGINS: System going down at "
void
nolog()
{
#ifndef __APPLE__
	int logfd;
	char *ct;

	(void)unlink(_PATH_NOLOGIN);	/* in case linked to another file */
	(void)signal(SIGINT, finish);
	(void)signal(SIGHUP, finish);
	(void)signal(SIGQUIT, finish);
	(void)signal(SIGTERM, finish);
	if ((logfd = open(_PATH_NOLOGIN, O_WRONLY|O_CREAT|O_TRUNC,
	    0664)) >= 0) {
		(void)write(logfd, NOMSG, sizeof(NOMSG) - 1);
		ct = ctime(&shuttime);
		(void)write(logfd, ct + 11, 5);
		(void)write(logfd, "\n\n", 2);
		(void)write(logfd, mbuf, strlen(mbuf));
		(void)close(logfd);
	}
#endif
}

void
finish(signo)
	int signo __unused;
{
#ifndef __APPLE__
	if (!killflg)
		(void)unlink(_PATH_NOLOGIN);
#endif
	exit(0);
}

void
badtime()
{
	errx(1, "bad time format");
}

void
usage(cp)
	const char *cp;
{
	if (cp != NULL)
		warnx("%s", cp);
	(void)fprintf(stderr,
	    "usage: shutdown [-] [-h | -p | -r | -k] [-o [-n]]"
	    " time [warning-message ...]\n");
	exit(1);
}

/*
 * The following tokens are included in the audit record for shutdown
 * header
 * subject
 * return
 */  
int audit_shutdown(int exitstatus)
{
	int aufd;
	token_t *tok;
	long au_cond;

	/* If we are not auditing, don't cut an audit record; just return */
	if (auditon(A_GETCOND, &au_cond, sizeof(long)) < 0) {
		fprintf(stderr, "shutdown: Could not determine audit condition\n");
		return 0;
	}
	if (au_cond == AUC_NOAUDIT)
		return 0;

	if((aufd = au_open()) == -1) {
		fprintf(stderr, "shutdown: Audit Error: au_open() failed\n");
		exit(1);      
	}

	/* The subject that performed the operation */
	if((tok = au_to_me()) == NULL) {
		fprintf(stderr, "shutdown: Audit Error: au_to_me() failed\n");
		exit(1);
	}
	au_write(aufd, tok);

	/* success and failure status */
	if((tok = au_to_return32(exitstatus, errno)) == NULL) {
		fprintf(stderr, "shutdown: Audit Error: au_to_return32() failed\n");
		exit(1);
	}
	au_write(aufd, tok);

	if(au_close(aufd, 1, AUE_shutdown) == -1) {
		fprintf(stderr, "shutdown: Audit Error: au_close() failed\n");
		exit(1);
	}
	return 1;
}
Commit	Line	Data
1815bff5 A	1	/*
1815bff5 A	2	* Copyright (c) 1988, 1990, 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) 1988, 1990, 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[] = "@(#)shutdown.c 8.4 (Berkeley) 4/28/95";
	43	#endif
	44	static const char rcsid[] =
	45	"$FreeBSD: src/sbin/shutdown/shutdown.c,v 1.23 2002/03/21 13:20:48 imp Exp $";
	46	#endif /* not lint */
	47
1815bff5 A	48	#include <sys/param.h>
	49	#include <sys/time.h>
	50	#include <sys/resource.h>
	51	#include <sys/syslog.h>
	52
	53	#include <ctype.h>
20e66415	54	#include <err.h>
1815bff5 A	55	#include <fcntl.h>
	56	#include <pwd.h>
	57	#include <setjmp.h>
	58	#include <signal.h>
	59	#include <stdio.h>
	60	#include <stdlib.h>
	61	#include <string.h>
1815bff5 A	62	#include <unistd.h>
1815bff5 A	63
733af6d0 A	64	#include <errno.h>
	65	#include <bsm/libbsm.h>
	66	#include <bsm/audit_uevents.h>
	67
	68
1815bff5 A	69	#include "pathnames.h"
1815bff5 A	70
20e66415 A	71	#ifdef __APPLE__
	72	#define __unused
	73	#endif
	74
1815bff5 A	75	#ifdef DEBUG
	76	#undef _PATH_NOLOGIN
	77	#define _PATH_NOLOGIN "./nologin"
1815bff5 A	78	#endif
	79
	80	#define H 6060
	81	#define M *60
	82	#define S *1
	83	#define NOLOG_TIME 5*60
	84	struct interval {
	85	int timeleft, timetowait;
	86	} tlist[] = {
20e66415 A	87	{ 10 H, 5 H },
	88	{ 5 H, 3 H },
	89	{ 2 H, 1 H },
	90	{ 1 H, 30 M },
	91	{ 30 M, 10 M },
	92	{ 20 M, 10 M },
	93	{ 10 M, 5 M },
	94	{ 5 M, 3 M },
	95	{ 2 M, 1 M },
	96	{ 1 M, 30 S },
	97	{ 30 S, 30 S },
	98	{ 0 , 0 }
1815bff5 A	99	};
	100	#undef H
	101	#undef M
	102	#undef S
	103
	104	static time_t offset, shuttime;
20e66415 A	105	static int dohalt, dopower, doreboot, killflg, mbuflen, oflag = 1;
	106	static char mbuf[BUFSIZ];
	107	static const char nosync, whom;
	108
	109	void badtime(void);
	110	void die_you_gravy_sucking_pig_dog(void);
	111	void finish(int);
	112	void getoffset(char *);
	113	void loop(void);
	114	void nolog(void);
	115	void timeout(int);
	116	void timewarn(int);
	117	void usage(const char *);
733af6d0	118	int audit_shutdown(int);
1815bff5 A	119
	120	int
	121	main(argc, argv)
	122	int argc;
	123	char *argv[];
	124	{
20e66415	125	char p, endp;
1815bff5 A	126	struct passwd *pw;
	127	int arglen, ch, len, readstdin;
	128
	129	#ifndef DEBUG
20e66415 A	130	if (geteuid())
20e66415 A	131	errx(1, "NOT super-user");
1815bff5 A	132	#endif
	133	nosync = NULL;
	134	readstdin = 0;
20e66415 A	135	#ifndef __APPLE__
	136	while ((ch = getopt(argc, argv, "-hknopr")) != -1)
	137	#else
	138	while ((ch = getopt(argc, argv, "-hknor")) != -1)
	139	#endif
1815bff5 A	140	switch (ch) {
	141	case '-':
	142	readstdin = 1;
	143	break;
1815bff5 A	144	case 'h':
	145	dohalt = 1;
	146	break;
	147	case 'k':
	148	killflg = 1;
	149	break;
	150	case 'n':
	151	nosync = "-n";
	152	break;
20e66415 A	153	case 'o':
	154	oflag = 1;
	155	break;
	156	#ifndef __APPLE__
	157	case 'p':
	158	dopower = 1;
	159	break;
	160	#endif
1815bff5 A	161	case 'r':
	162	doreboot = 1;
	163	break;
	164	case '?':
	165	default:
20e66415	166	usage((char *)NULL);
1815bff5 A	167	}
	168	argc -= optind;
	169	argv += optind;
	170
	171	if (argc < 1)
20e66415 A	172	usage((char *)NULL);
	173
	174	#ifndef __APPLE__
	175	if (killflg + doreboot + dohalt + dopower > 1)
	176	usage("incompatible switches -h, -k, -p and -r");
	177
	178	if (oflag && !(dohalt \|\| dopower \|\| doreboot))
	179	usage("-o requires -h, -p or -r");
	180	#else
	181	if (killflg + doreboot + dohalt > 1)
	182	usage("incompatible switches -h, -k, and -r");
	183
	184	if (oflag && !(dohalt \|\| doreboot))
	185	usage("-o requires -h or -r");
	186	#endif
	187
	188	if (nosync != NULL && !oflag)
	189	usage("-n requires -o");
1815bff5	190
1815bff5 A	191	getoffset(*argv++);
	192
	193	if (*argv) {
	194	for (p = mbuf, len = sizeof(mbuf); *argv; ++argv) {
	195	arglen = strlen(*argv);
	196	if ((len -= arglen) <= 2)
	197	break;
	198	if (p != mbuf)
	199	*p++ = ' ';
	200	memmove(p, *argv, arglen);
	201	p += arglen;
	202	}
	203	*p = '\n';
	204	*++p = '\0';
	205	}
	206
	207	if (readstdin) {
	208	p = mbuf;
	209	endp = mbuf + sizeof(mbuf) - 2;
	210	for (;;) {
	211	if (!fgets(p, endp - p + 1, stdin))
	212	break;
	213	for (; *p && p < endp; ++p);
	214	if (p == endp) {
	215	*p = '\n';
	216	*++p = '\0';
	217	break;
	218	}
	219	}
	220	}
	221	mbuflen = strlen(mbuf);
	222
	223	if (offset)
	224	(void)printf("Shutdown at %.24s.\n", ctime(&shuttime));
	225	else
	226	(void)printf("Shutdown NOW!\n");
	227
	228	if (!(whom = getlogin()))
	229	whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
	230
733af6d0	231
1815bff5	232	#ifdef DEBUG
733af6d0	233	audit_shutdown(0);
1815bff5 A	234	(void)putc('\n', stdout);
	235	#else
	236	(void)setpriority(PRIO_PROCESS, 0, PRIO_MIN);
	237	{
	238	int forkpid;
	239
	240	forkpid = fork();
733af6d0 A	241	if (forkpid == -1) {
733af6d0 A	242	audit_shutdown(1);
20e66415	243	err(1, "fork");
733af6d0 A	244	}
733af6d0 A	245	if (forkpid) {
20e66415	246	errx(0, "[pid %d]", forkpid);
733af6d0	247	}
1815bff5	248	}
733af6d0	249	audit_shutdown(0);
20e66415	250	setsid();
1815bff5 A	251	#endif
	252	openlog("shutdown", LOG_CONS, LOG_AUTH);
	253	loop();
20e66415	254	return(0);
1815bff5 A	255	}
	256
	257	void
	258	loop()
	259	{
	260	struct interval *tp;
	261	u_int sltime;
	262	int logged;
	263
	264	if (offset <= NOLOG_TIME) {
	265	logged = 1;
	266	nolog();
	267	}
	268	else
	269	logged = 0;
	270	tp = tlist;
	271	if (tp->timeleft < offset)
	272	(void)sleep((u_int)(offset - tp->timeleft));
	273	else {
20e66415	274	while (tp->timeleft && offset < tp->timeleft)
1815bff5 A	275	++tp;
	276	/*
	277	* Warn now, if going to sleep more than a fifth of
	278	* the next wait time.
	279	*/
20e66415 A	280	if ((sltime = offset - tp->timeleft)) {
20e66415 A	281	if (sltime > (u_int)(tp->timetowait / 5))
1815bff5 A	282	timewarn(offset);
	283	(void)sleep(sltime);
	284	}
	285	}
	286	for (;; ++tp) {
	287	timewarn(tp->timeleft);
	288	if (!logged && tp->timeleft <= NOLOG_TIME) {
	289	logged = 1;
	290	nolog();
	291	}
	292	(void)sleep((u_int)tp->timetowait);
	293	if (!tp->timeleft)
	294	break;
	295	}
	296	die_you_gravy_sucking_pig_dog();
	297	}
	298
	299	static jmp_buf alarmbuf;
	300
20e66415 A	301	static const char *restricted_environ[] = {
	302	"PATH=" _PATH_STDPATH,
	303	NULL
	304	};
	305
1815bff5 A	306	void
	307	timewarn(timeleft)
	308	int timeleft;
	309	{
	310	static int first;
	311	static char hostname[MAXHOSTNAMELEN + 1];
	312	FILE *pf;
	313	char wcmd[MAXPATHLEN + 4];
20e66415	314	extern const char **environ;
1815bff5 A	315
	316	if (!first++)
	317	(void)gethostname(hostname, sizeof(hostname));
	318
	319	/* undoc -n option to wall suppresses normal wall banner */
	320	(void)snprintf(wcmd, sizeof(wcmd), "%s -n", _PATH_WALL);
20e66415	321	environ = restricted_environ;
1815bff5 A	322	if (!(pf = popen(wcmd, "w"))) {
	323	syslog(LOG_ERR, "shutdown: can't find %s: %m", _PATH_WALL);
	324	return;
	325	}
	326
	327	(void)fprintf(pf,
	328	"\007* %sSystem shutdown message from %s@%s *\007\n",
	329	timeleft ? "": "FINAL ", whom, hostname);
	330
	331	if (timeleft > 10*60)
	332	(void)fprintf(pf, "System going down at %5.5s\n\n",
	333	ctime(&shuttime) + 11);
	334	else if (timeleft > 59)
	335	(void)fprintf(pf, "System going down in %d minute%s\n\n",
	336	timeleft / 60, (timeleft > 60) ? "s" : "");
	337	else if (timeleft)
	338	(void)fprintf(pf, "System going down in 30 seconds\n\n");
	339	else
	340	(void)fprintf(pf, "System going down IMMEDIATELY\n\n");
	341
	342	if (mbuflen)
	343	(void)fwrite(mbuf, sizeof(*mbuf), mbuflen, pf);
	344
	345	/*
	346	* play some games, just in case wall doesn't come back
20e66415	347	* probably unnecessary, given that wall is careful.
1815bff5 A	348	*/
	349	if (!setjmp(alarmbuf)) {
	350	(void)signal(SIGALRM, timeout);
	351	(void)alarm((u_int)30);
	352	(void)pclose(pf);
	353	(void)alarm((u_int)0);
	354	(void)signal(SIGALRM, SIG_DFL);
	355	}
	356	}
	357
	358	void
	359	timeout(signo)
20e66415	360	int signo __unused;
1815bff5 A	361	{
	362	longjmp(alarmbuf, 1);
	363	}
	364
	365	void
	366	die_you_gravy_sucking_pig_dog()
	367	{
20e66415	368	char *empty_environ[] = { NULL };
1815bff5 A	369
1815bff5 A	370	syslog(LOG_NOTICE, "%s by %s: %s",
20e66415 A	371	#ifndef __APPLE__
	372	doreboot ? "reboot" : dohalt ? "halt" : dopower ? "power-down" :
	373	#else
	374	doreboot ? "reboot" : dohalt ? "halt" :
	375	#endif
	376	"shutdown", whom, mbuf);
1815bff5 A	377	(void)sleep(2);
	378
	379	(void)printf("\r\nSystem shutdown time has arrived\007\007\r\n");
	380	if (killflg) {
	381	(void)printf("\rbut you'll have to do it yourself\r\n");
20e66415	382	exit(0);
1815bff5	383	}
1815bff5 A	384	#ifdef DEBUG
	385	if (doreboot)
	386	(void)printf("reboot");
	387	else if (dohalt)
	388	(void)printf("halt");
20e66415 A	389	#ifndef __APPLE__
	390	else if (dopower)
	391	(void)printf("power-down");
	392	#endif
	393	if (nosync != NULL)
1815bff5	394	(void)printf(" no sync");
1815bff5 A	395	(void)printf("\nkill -HUP 1\n");
1815bff5 A	396	#else
20e66415 A	397	if (!oflag) {
	398	(void)kill(1, doreboot ? SIGINT : /* reboot */
	399	dohalt ? SIGUSR1 : /* halt */
	400	#ifndef __APPLE__
	401	dopower ? SIGUSR2 : /* power-down */
	402	#endif
	403	SIGTERM); /* single-user */
	404	} else {
	405	if (doreboot) {
	406	execle(_PATH_REBOOT, "reboot", "-l", nosync,
	407	(char *)NULL, empty_environ);
	408	syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
	409	_PATH_REBOOT);
	410	warn(_PATH_REBOOT);
	411	}
	412	else if (dohalt) {
	413	execle(_PATH_HALT, "halt", "-l", nosync,
	414	(char *)NULL, empty_environ);
	415	syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
	416	_PATH_HALT);
	417	warn(_PATH_HALT);
	418	}
	419	#ifndef __APPLE__
	420	else if (dopower) {
	421	execle(_PATH_HALT, "halt", "-l", "-p", nosync,
	422	(char *)NULL, empty_environ);
	423	syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
	424	_PATH_HALT);
	425	warn(_PATH_HALT);
	426	}
	427	#endif
	428	(void)kill(1, SIGTERM); /* to single-user */
1815bff5	429	}
1815bff5 A	430	#endif
	431	finish(0);
	432	}
	433
	434	#define ATOI2(p) (p[0] - '0') * 10 + (p[1] - '0'); p += 2;
	435
	436	void
	437	getoffset(timearg)
20e66415	438	char *timearg;
1815bff5	439	{
20e66415 A	440	struct tm *lt;
20e66415 A	441	char *p;
1815bff5	442	time_t now;
20e66415 A	443	int this_year;
	444
	445	(void)time(&now);
1815bff5 A	446
	447	if (!strcasecmp(timearg, "now")) { /* now */
	448	offset = 0;
20e66415	449	shuttime = now;
1815bff5 A	450	return;
	451	}
	452
1815bff5 A	453	if (timearg == '+') { / +minutes */
	454	if (!isdigit(*++timearg))
	455	badtime();
20e66415 A	456	if ((offset = atoi(timearg) * 60) < 0)
20e66415 A	457	badtime();
1815bff5 A	458	shuttime = now + offset;
	459	return;
	460	}
	461
	462	/* handle hh:mm by getting rid of the colon */
	463	for (p = timearg; *p; ++p)
20e66415	464	if (!isascii(p) \|\| !isdigit(p)) {
1815bff5 A	465	if (*p == ':' && strlen(p) == 3) {
	466	p[0] = p[1];
	467	p[1] = p[2];
	468	p[2] = '\0';
	469	}
	470	else
	471	badtime();
20e66415	472	}
1815bff5 A	473
	474	unsetenv("TZ"); /* OUR timezone */
	475	lt = localtime(&now); /* current time val */
	476
	477	switch(strlen(timearg)) {
	478	case 10:
20e66415	479	this_year = lt->tm_year;
1815bff5	480	lt->tm_year = ATOI2(timearg);
20e66415 A	481	/*
	482	* check if the specified year is in the next century.
	483	* allow for one year of user error as many people will
	484	* enter n - 1 at the start of year n.
	485	*/
	486	if (lt->tm_year < (this_year % 100) - 1)
	487	lt->tm_year += 100;
	488	/* adjust for the year 2000 and beyond */
	489	lt->tm_year += (this_year - (this_year % 100));
1815bff5 A	490	/* FALLTHROUGH */
	491	case 8:
	492	lt->tm_mon = ATOI2(timearg);
	493	if (--lt->tm_mon < 0 \|\| lt->tm_mon > 11)
	494	badtime();
	495	/* FALLTHROUGH */
	496	case 6:
	497	lt->tm_mday = ATOI2(timearg);
	498	if (lt->tm_mday < 1 \|\| lt->tm_mday > 31)
	499	badtime();
	500	/* FALLTHROUGH */
	501	case 4:
	502	lt->tm_hour = ATOI2(timearg);
	503	if (lt->tm_hour < 0 \|\| lt->tm_hour > 23)
	504	badtime();
	505	lt->tm_min = ATOI2(timearg);
	506	if (lt->tm_min < 0 \|\| lt->tm_min > 59)
	507	badtime();
	508	lt->tm_sec = 0;
	509	if ((shuttime = mktime(lt)) == -1)
	510	badtime();
20e66415 A	511	if ((offset = shuttime - now) < 0)
20e66415 A	512	errx(1, "that time is already past.");
1815bff5 A	513	break;
	514	default:
	515	badtime();
	516	}
	517	}
	518
1815bff5 A	519	#define NOMSG "\n\nNO LOGINS: System going down at "
	520	void
	521	nolog()
	522	{
20e66415	523	#ifndef __APPLE__
1815bff5 A	524	int logfd;
	525	char *ct;
	526
	527	(void)unlink(_PATH_NOLOGIN); /* in case linked to another file */
	528	(void)signal(SIGINT, finish);
	529	(void)signal(SIGHUP, finish);
	530	(void)signal(SIGQUIT, finish);
	531	(void)signal(SIGTERM, finish);
	532	if ((logfd = open(_PATH_NOLOGIN, O_WRONLY\|O_CREAT\|O_TRUNC,
	533	0664)) >= 0) {
	534	(void)write(logfd, NOMSG, sizeof(NOMSG) - 1);
	535	ct = ctime(&shuttime);
	536	(void)write(logfd, ct + 11, 5);
	537	(void)write(logfd, "\n\n", 2);
	538	(void)write(logfd, mbuf, strlen(mbuf));
	539	(void)close(logfd);
	540	}
20e66415	541	#endif
1815bff5 A	542	}
	543
	544	void
	545	finish(signo)
20e66415	546	int signo __unused;
1815bff5	547	{
20e66415	548	#ifndef __APPLE__
1815bff5 A	549	if (!killflg)
1815bff5 A	550	(void)unlink(_PATH_NOLOGIN);
20e66415	551	#endif
1815bff5 A	552	exit(0);
	553	}
	554
	555	void
	556	badtime()
	557	{
20e66415	558	errx(1, "bad time format");
1815bff5 A	559	}
	560
	561	void
20e66415 A	562	usage(cp)
20e66415 A	563	const char *cp;
1815bff5	564	{
20e66415 A	565	if (cp != NULL)
	566	warnx("%s", cp);
	567	(void)fprintf(stderr,
	568	"usage: shutdown [-] [-h \| -p \| -r \| -k] [-o [-n]]"
	569	" time [warning-message ...]\n");
1815bff5 A	570	exit(1);
1815bff5 A	571	}
733af6d0 A	572
	573	/*
	574	* The following tokens are included in the audit record for shutdown
	575	* header
	576	* subject
	577	* return
	578	*/
	579	int audit_shutdown(int exitstatus)
	580	{
	581	int aufd;
	582	token_t *tok;
	583	long au_cond;
	584
	585	/* If we are not auditing, don't cut an audit record; just return */
	586	if (auditon(A_GETCOND, &au_cond, sizeof(long)) < 0) {
	587	fprintf(stderr, "shutdown: Could not determine audit condition\n");
	588	return 0;
	589	}
	590	if (au_cond == AUC_NOAUDIT)
	591	return 0;
	592
	593	if((aufd = au_open()) == -1) {
	594	fprintf(stderr, "shutdown: Audit Error: au_open() failed\n");
	595	exit(1);
	596	}
	597
	598	/* The subject that performed the operation */
	599	if((tok = au_to_me()) == NULL) {
	600	fprintf(stderr, "shutdown: Audit Error: au_to_me() failed\n");
	601	exit(1);
	602	}
	603	au_write(aufd, tok);
	604
	605	/* success and failure status */
	606	if((tok = au_to_return32(exitstatus, errno)) == NULL) {
	607	fprintf(stderr, "shutdown: Audit Error: au_to_return32() failed\n");
	608	exit(1);
	609	}
	610	au_write(aufd, tok);
	611
	612	if(au_close(aufd, 1, AUE_shutdown) == -1) {
	613	fprintf(stderr, "shutdown: Audit Error: au_close() failed\n");
	614	exit(1);
	615	}
	616	return 1;
	617	}
	618