[unix-history] / usr / src / sbin / shutdown / shutdown.c

/*
 * Copyright (c) 1988, 1990 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
char copyright[] =
"@(#) Copyright (c) 1988 Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)shutdown.c	5.16 (Berkeley) 2/3/91";
#endif /* not lint */

#include <sys/param.h>
#include <sys/time.h>
#include <sys/file.h>
#include <sys/resource.h>
#include <sys/syslog.h>
#include <sys/signal.h>
#include <setjmp.h>
#include <tzfile.h>
#include <pwd.h>
#include <stdio.h>
#include <ctype.h>
#include "pathnames.h"

#ifdef DEBUG
#undef _PATH_NOLOGIN
#define	_PATH_NOLOGIN	"./nologin"
#undef _PATH_FASTBOOT
#define	_PATH_FASTBOOT	"./fastboot"
#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,
}, *tp = tlist;
#undef H
#undef M
#undef S

static time_t offset, shuttime;
static int dofast, dohalt, doreboot, killflg, mbuflen;
static char *nosync, *whom, mbuf[BUFSIZ];

main(argc, argv)
	int argc;
	char **argv;
{
	extern int optind;
	register char *p, *endp;
	int arglen, ch, len, readstdin;
	struct passwd *pw;
	char *strcat(), *getlogin();
	uid_t geteuid();

#ifndef DEBUG
	if (geteuid()) {
		(void)fprintf(stderr, "shutdown: NOT super-user\n");
		exit(1);
	}
#endif
	nosync = NULL;
	readstdin = 0;
	while ((ch = getopt(argc, argv, "-fhknr")) != EOF)
		switch (ch) {
		case '-':
			readstdin = 1;
			break;
		case 'f':
			dofast = 1;
			break;
		case 'h':
			dohalt = 1;
			break;
		case 'k':
			killflg = 1;
			break;
		case 'n':
			nosync = "-n";
			break;
		case 'r':
			doreboot = 1;
			break;
		case '?':
		default:
			usage();
		}
	argc -= optind;
	argv += optind;

	if (argc < 1)
		usage();

	if (dofast && nosync) {
		(void)fprintf(stderr,
		    "shutdown: incompatible switches -f and -n.\n");
		usage();
	}
	if (doreboot && dohalt) {
		(void)fprintf(stderr,
		    "shutdown: incompatible switches -h and -r.\n");
		usage();
	}
	getoffset(*argv++);

	if (*argv) {
		for (p = mbuf, len = sizeof(mbuf); *argv; ++argv) {
			arglen = strlen(*argv);
			if ((len -= arglen) <= 2)
				break;
			if (p != mbuf)
				*p++ = ' ';
			bcopy(*argv, p, 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
	(void)putc('\n', stdout);
#else
	(void)setpriority(PRIO_PROCESS, 0, PRIO_MIN);
	{
		int forkpid;

		forkpid = fork();
		if (forkpid == -1) {
			perror("shutdown: fork");
			exit(1);
		}
		if (forkpid) {
			(void)printf("shutdown: [pid %d]\n", forkpid);
			exit(0);
		}
	}
#endif
	openlog("shutdown", LOG_CONS, LOG_AUTH);
	loop();
	/*NOTREACHED*/
}

loop()
{
	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 (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 > tp->timetowait / 5)
				warn();
			(void)sleep(sltime);
		}
	}
	for (;; ++tp) {
		warn();
		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;

warn()
{
	static int first;
	static char hostname[MAXHOSTNAMELEN + 1];
	char wcmd[MAXPATHLEN + 4];
	FILE *pf;
	char *ctime();
	void timeout();

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

	/* undoc -n option to wall suppresses normal wall banner */
	(void)sprintf(wcmd, "%s -n", _PATH_WALL);
	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",
	    tp->timeleft ? "": "FINAL ", whom, hostname);

	if (tp->timeleft > 10*60)
		(void)fprintf(pf, "System going down at %5.5s\n\n",
		    ctime(&shuttime) + 11);
	else if (tp->timeleft > 59)
		(void)fprintf(pf, "System going down in %d minute%s\n\n",
		    tp->timeleft / 60, (tp->timeleft > 60) ? "s" : "");
	else if (tp->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 unecessary, 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()
{
	longjmp(alarmbuf, 1);
}

die_you_gravy_sucking_pig_dog()
{
	void finish();

	syslog(LOG_NOTICE, "%s by %s: %s",
	    doreboot ? "reboot" : dohalt ? "halt" : "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");
		finish();
	}
	if (dofast)
		doitfast();
#ifdef DEBUG
	if (doreboot)
		(void)printf("reboot");
	else if (dohalt)
		(void)printf("halt");
	if (nosync)
		(void)printf(" no sync");
	if (dofast)
		(void)printf(" no fsck");
	(void)printf("\nkill -HUP 1\n");
#else
	if (doreboot) {
		execle(_PATH_REBOOT, "reboot", "-l", nosync, 0);
		syslog(LOG_ERR, "shutdown: can't exec %s: %m.", _PATH_REBOOT);
		perror("shutdown");
	}
	else if (dohalt) {
		execle(_PATH_HALT, "halt", "-l", nosync, 0);
		syslog(LOG_ERR, "shutdown: can't exec %s: %m.", _PATH_HALT);
		perror("shutdown");
	}
	(void)kill(1, SIGTERM);		/* to single user */
#endif
	finish();
}

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

getoffset(timearg)
	register char *timearg;
{
	register struct tm *lt;
	register char *p;
	time_t now, time();

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

	(void)time(&now);
	if (*timearg == '+') {				/* +minutes */
		if (!isdigit(*++timearg))
			badtime();
		offset = atoi(timearg) * 60;
		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:
		lt->tm_year = ATOI2(timearg);
		/* 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) {
			(void)fprintf(stderr,
			    "shutdown: that time is already past.\n");
			exit(1);
		}
		break;
	default:
		badtime();
	}
}

#define	FSMSG	"fastboot file for fsck\n"
doitfast()
{
	int fastfd;

	if ((fastfd = open(_PATH_FASTBOOT, O_WRONLY|O_CREAT|O_TRUNC,
	    0664)) >= 0) {
		(void)write(fastfd, FSMSG, sizeof(FSMSG) - 1);
		(void)close(fastfd);
	}
}

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

	(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);
	}
}

void
finish()
{
	(void)unlink(_PATH_NOLOGIN);
	exit(0);
}

badtime()
{
	(void)fprintf(stderr, "shutdown: bad time format.\n");
	exit(1);
}

usage()
{
	fprintf(stderr, "usage: shutdown [-fhknr] shutdowntime [ message ]\n");
	exit(1);
}
Commit	Line	Data
c6bf69c0 WJ	1	/*
	2	* Copyright (c) 1988, 1990 Regents of the University of California.
	3	* All rights reserved.
	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:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	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
	34	#ifndef lint
	35	char copyright[] =
	36	"@(#) Copyright (c) 1988 Regents of the University of California.\n\
	37	All rights reserved.\n";
	38	#endif /* not lint */
	39
	40	#ifndef lint
	41	static char sccsid[] = "@(#)shutdown.c 5.16 (Berkeley) 2/3/91";
	42	#endif /* not lint */
	43
	44	#include <sys/param.h>
	45	#include <sys/time.h>
	46	#include <sys/file.h>
	47	#include <sys/resource.h>
	48	#include <sys/syslog.h>
	49	#include <sys/signal.h>
	50	#include <setjmp.h>
	51	#include <tzfile.h>
	52	#include <pwd.h>
	53	#include <stdio.h>
	54	#include <ctype.h>
	55	#include "pathnames.h"
	56
	57	#ifdef DEBUG
	58	#undef _PATH_NOLOGIN
	59	#define _PATH_NOLOGIN "./nologin"
	60	#undef _PATH_FASTBOOT
	61	#define _PATH_FASTBOOT "./fastboot"
	62	#endif
	63
	64	#define H 6060
65	#define M *60
66	#define S *1
67	#define NOLOG_TIME 5*60
68	struct interval {
69	int timeleft, timetowait;
70	} tlist[] = {
71	10 H, 5 H, 5 H, 3 H, 2 H, 1 H, 1 H, 30 M,
72	30 M, 10 M, 20 M, 10 M, 10 M, 5 M, 5 M, 3 M,
73	2 M, 1 M, 1 M, 30 S, 30 S, 30 S,
74	0, 0,
75	}, *tp = tlist;
76	#undef H
77	#undef M
78	#undef S
79
80	static time_t offset, shuttime;
81	static int dofast, dohalt, doreboot, killflg, mbuflen;
82	static char nosync, whom, mbuf[BUFSIZ];
83
84	main(argc, argv)
85	int argc;
86	char **argv;
87	{
88	extern int optind;
89	register char p, endp;
90	int arglen, ch, len, readstdin;
91	struct passwd *pw;
92	char strcat(), getlogin();
93	uid_t geteuid();
94
95	#ifndef DEBUG
96	if (geteuid()) {
97	(void)fprintf(stderr, "shutdown: NOT super-user\n");
98	exit(1);
99	}
100	#endif
101	nosync = NULL;
102	readstdin = 0;
103	while ((ch = getopt(argc, argv, "-fhknr")) != EOF)
104	switch (ch) {
105	case '-':
106	readstdin = 1;
107	break;
108	case 'f':
109	dofast = 1;
110	break;
111	case 'h':
112	dohalt = 1;
113	break;
114	case 'k':
115	killflg = 1;
116	break;
117	case 'n':
118	nosync = "-n";
119	break;
120	case 'r':
121	doreboot = 1;
122	break;
123	case '?':
124	default:
125	usage();
126	}
127	argc -= optind;
128	argv += optind;
129
130	if (argc < 1)
131	usage();
132
133	if (dofast && nosync) {
134	(void)fprintf(stderr,
135	"shutdown: incompatible switches -f and -n.\n");
136	usage();
137	}
138	if (doreboot && dohalt) {
139	(void)fprintf(stderr,
140	"shutdown: incompatible switches -h and -r.\n");
141	usage();
142	}
143	getoffset(*argv++);
144
145	if (*argv) {
146	for (p = mbuf, len = sizeof(mbuf); *argv; ++argv) {
147	arglen = strlen(*argv);
148	if ((len -= arglen) <= 2)
149	break;
150	if (p != mbuf)
151	*p++ = ' ';
152	bcopy(*argv, p, arglen);
153	p += arglen;
154	}
155	*p = '\n';
156	*++p = '\0';
157	}
158
159	if (readstdin) {
160	p = mbuf;
161	endp = mbuf + sizeof(mbuf) - 2;
162	for (;;) {
163	if (!fgets(p, endp - p + 1, stdin))
164	break;
165	for (; *p && p < endp; ++p);
166	if (p == endp) {
167	*p = '\n';
168	*++p = '\0';
169	break;
170	}
171	}
172	}
173	mbuflen = strlen(mbuf);
174
175	if (offset)
176	(void)printf("Shutdown at %.24s.\n", ctime(&shuttime));
177	else
178	(void)printf("Shutdown NOW!\n");
179
180	if (!(whom = getlogin()))
181	whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
182
183	#ifdef DEBUG
184	(void)putc('\n', stdout);
185	#else
186	(void)setpriority(PRIO_PROCESS, 0, PRIO_MIN);
187	{
188	int forkpid;
189
190	forkpid = fork();
191	if (forkpid == -1) {
192	perror("shutdown: fork");
193	exit(1);
194	}
195	if (forkpid) {
196	(void)printf("shutdown: [pid %d]\n", forkpid);
197	exit(0);
198	}
199	}
200	#endif
201	openlog("shutdown", LOG_CONS, LOG_AUTH);
202	loop();
203	/NOTREACHED/
204	}
205
206	loop()
207	{
208	u_int sltime;
209	int logged;
210
211	if (offset <= NOLOG_TIME) {
212	logged = 1;
213	nolog();
214	}
215	else
216	logged = 0;
217	tp = tlist;
218	if (tp->timeleft < offset)
219	(void)sleep((u_int)(offset - tp->timeleft));
220	else {
221	while (offset < tp->timeleft)
222	++tp;
223	/*
224	* warn now, if going to sleep more than a fifth of
225	* the next wait time.
226	*/
227	if (sltime = offset - tp->timeleft) {
228	if (sltime > tp->timetowait / 5)
229	warn();
230	(void)sleep(sltime);
231	}
232	}
233	for (;; ++tp) {
234	warn();
235	if (!logged && tp->timeleft <= NOLOG_TIME) {
236	logged = 1;
237	nolog();
238	}
239	(void)sleep((u_int)tp->timetowait);
240	if (!tp->timeleft)
241	break;
242	}
243	die_you_gravy_sucking_pig_dog();
244	}
245
246	static jmp_buf alarmbuf;
247
248	warn()
249	{
250	static int first;
251	static char hostname[MAXHOSTNAMELEN + 1];
252	char wcmd[MAXPATHLEN + 4];
253	FILE *pf;
254	char *ctime();
255	void timeout();
256
257	if (!first++)
258	(void)gethostname(hostname, sizeof(hostname));
259
260	/* undoc -n option to wall suppresses normal wall banner */
261	(void)sprintf(wcmd, "%s -n", _PATH_WALL);
262	if (!(pf = popen(wcmd, "w"))) {
263	syslog(LOG_ERR, "shutdown: can't find %s: %m", _PATH_WALL);
264	return;
265	}
266
267	(void)fprintf(pf,
268	"\007* %sSystem shutdown message from %s@%s *\007\n",
269	tp->timeleft ? "": "FINAL ", whom, hostname);
270
271	if (tp->timeleft > 10*60)
272	(void)fprintf(pf, "System going down at %5.5s\n\n",
273	ctime(&shuttime) + 11);
274	else if (tp->timeleft > 59)
275	(void)fprintf(pf, "System going down in %d minute%s\n\n",
276	tp->timeleft / 60, (tp->timeleft > 60) ? "s" : "");
277	else if (tp->timeleft)
278	(void)fprintf(pf, "System going down in 30 seconds\n\n");
279	else
280	(void)fprintf(pf, "System going down IMMEDIATELY\n\n");
281
282	if (mbuflen)
283	(void)fwrite(mbuf, sizeof(*mbuf), mbuflen, pf);
284
285	/*
286	* play some games, just in case wall doesn't come back
287	* probably unecessary, given that wall is careful.
288	*/
289	if (!setjmp(alarmbuf)) {
290	(void)signal(SIGALRM, timeout);
291	(void)alarm((u_int)30);
292	(void)pclose(pf);
293	(void)alarm((u_int)0);
294	(void)signal(SIGALRM, SIG_DFL);
295	}
296	}
297
298	void
299	timeout()
300	{
301	longjmp(alarmbuf, 1);
302	}
303
304	die_you_gravy_sucking_pig_dog()
305	{
306	void finish();
307
308	syslog(LOG_NOTICE, "%s by %s: %s",
309	doreboot ? "reboot" : dohalt ? "halt" : "shutdown", whom, mbuf);
310	(void)sleep(2);
311
312	(void)printf("\r\nSystem shutdown time has arrived\007\007\r\n");
313	if (killflg) {
314	(void)printf("\rbut you'll have to do it yourself\r\n");
315	finish();
316	}
317	if (dofast)
318	doitfast();
319	#ifdef DEBUG
320	if (doreboot)
321	(void)printf("reboot");
322	else if (dohalt)
323	(void)printf("halt");
324	if (nosync)
325	(void)printf(" no sync");
326	if (dofast)
327	(void)printf(" no fsck");
328	(void)printf("\nkill -HUP 1\n");
329	#else
330	if (doreboot) {
331	execle(_PATH_REBOOT, "reboot", "-l", nosync, 0);
332	syslog(LOG_ERR, "shutdown: can't exec %s: %m.", _PATH_REBOOT);
333	perror("shutdown");
334	}
335	else if (dohalt) {
336	execle(_PATH_HALT, "halt", "-l", nosync, 0);
337	syslog(LOG_ERR, "shutdown: can't exec %s: %m.", _PATH_HALT);
338	perror("shutdown");
339	}
340	(void)kill(1, SIGTERM); /* to single user */
341	#endif
342	finish();
343	}
344
345	#define ATOI2(p) (p[0] - '0') * 10 + (p[1] - '0'); p += 2;
346
347	getoffset(timearg)
348	register char *timearg;
349	{
350	register struct tm *lt;
351	register char *p;
352	time_t now, time();
353
354	if (!strcasecmp(timearg, "now")) { /* now */
355	offset = 0;
356	return;
357	}
358
359	(void)time(&now);
360	if (timearg == '+') { / +minutes */
361	if (!isdigit(*++timearg))
362	badtime();
363	offset = atoi(timearg) * 60;
364	shuttime = now + offset;
365	return;
366	}
367
368	/* handle hh:mm by getting rid of the colon */
369	for (p = timearg; *p; ++p)
370	if (!isascii(p) \|\| !isdigit(p))
371	if (*p == ':' && strlen(p) == 3) {
372	p[0] = p[1];
373	p[1] = p[2];
374	p[2] = '\0';
375	}
376	else
377	badtime();
378
379	unsetenv("TZ"); /* OUR timezone */
380	lt = localtime(&now); /* current time val */
381
382	switch(strlen(timearg)) {
383	case 10:
384	lt->tm_year = ATOI2(timearg);
385	/* FALLTHROUGH */
386	case 8:
387	lt->tm_mon = ATOI2(timearg);
388	if (--lt->tm_mon < 0 \|\| lt->tm_mon > 11)
389	badtime();
390	/* FALLTHROUGH */
391	case 6:
392	lt->tm_mday = ATOI2(timearg);
393	if (lt->tm_mday < 1 \|\| lt->tm_mday > 31)
394	badtime();
395	/* FALLTHROUGH */
396	case 4:
397	lt->tm_hour = ATOI2(timearg);
398	if (lt->tm_hour < 0 \|\| lt->tm_hour > 23)
399	badtime();
400	lt->tm_min = ATOI2(timearg);
401	if (lt->tm_min < 0 \|\| lt->tm_min > 59)
402	badtime();
403	lt->tm_sec = 0;
404	if ((shuttime = mktime(lt)) == -1)
405	badtime();
406	if ((offset = shuttime - now) < 0) {
407	(void)fprintf(stderr,
408	"shutdown: that time is already past.\n");
409	exit(1);
410	}
411	break;
412	default:
413	badtime();
414	}
415	}
416
417	#define FSMSG "fastboot file for fsck\n"
418	doitfast()
419	{
420	int fastfd;
421
422	if ((fastfd = open(_PATH_FASTBOOT, O_WRONLY\|O_CREAT\|O_TRUNC,
423	0664)) >= 0) {
424	(void)write(fastfd, FSMSG, sizeof(FSMSG) - 1);
425	(void)close(fastfd);
426	}
427	}
428
429	#define NOMSG "\n\nNO LOGINS: System going down at "
430	nolog()
431	{
432	int logfd;
433	char ct, ctime();
434	void finish();
435
436	(void)unlink(_PATH_NOLOGIN); /* in case linked to another file */
437	(void)signal(SIGINT, finish);
438	(void)signal(SIGHUP, finish);
439	(void)signal(SIGQUIT, finish);
440	(void)signal(SIGTERM, finish);
441	if ((logfd = open(_PATH_NOLOGIN, O_WRONLY\|O_CREAT\|O_TRUNC,
442	0664)) >= 0) {
443	(void)write(logfd, NOMSG, sizeof(NOMSG) - 1);
444	ct = ctime(&shuttime);
445	(void)write(logfd, ct + 11, 5);
446	(void)write(logfd, "\n\n", 2);
447	(void)write(logfd, mbuf, strlen(mbuf));
448	(void)close(logfd);
449	}
450	}
451
452	void
453	finish()
454	{
455	(void)unlink(_PATH_NOLOGIN);
456	exit(0);
457	}
458
459	badtime()
460	{
461	(void)fprintf(stderr, "shutdown: bad time format.\n");
462	exit(1);
463	}
464
465	usage()
466	{
467	fprintf(stderr, "usage: shutdown [-fhknr] shutdowntime [ message ]\n");
468	exit(1);
469	}