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

static	char *sccsid = "@(#)shutdown.c	4.11 (Berkeley) 82/02/01";

#include <stdio.h>
#include <ctype.h>
#include <signal.h>
#include <utmp.h>
#include <time.h>
#include <sys/types.h>
#include <whoami.h>
/*
 *	/etc/shutdown when [messages]
 *
 *	allow super users to tell users and remind users
 *	of iminent shutdown of unix
 *	and shut it down automatically
 *	and even reboot or halt the machine if they desire
 *
 *		Ian Johnstone, Sydney, 1977
 *		Robert Elz, Melbourne, 1978
 *		Peter Lamb, Melbourne, 1980
 *		William Joy, Berkeley, 1981
 *		Michael Toy, Berkeley, 1981
 *		Dave Presotto, Berkeley, 1981
 */
#ifdef DEBUG
#define LOGFILE "shutdown.log"
#else
#define LOGFILE "/usr/adm/shutdownlog"
#endif
#define	REBOOT	"/etc/reboot"
#define	HALT	"/etc/halt"
#define MAXINTS 20
#define	HOURS	*3600
#define MINUTES	*60
#define SECONDS
#define NLOG		20		/* no of args possible for message */
#define	NOLOGTIME	5 MINUTES
#define IGNOREUSER	"sleeper"

int	do_nothing();
time_t	getsdt();

extern	char *ctime();
extern	struct tm *localtime();

struct	utmp utmp;
int	sint;
int	stogo;
char	tpath[] =	"/dev/";
int	nlflag = 1;		/* nolog yet to be done */
int	killflg = 1;
int	reboot = 0;
int	halt = 0;
char	term[sizeof tpath + sizeof utmp.ut_line];
char	tbuf[BUFSIZ];
char	nolog1[] = "\n\nNO LOGINS: System going down at %5.5s\n\n";
char	*nolog2[NLOG+1];
#ifdef	DEBUG
char	nologin[] = "nologin";
#else
char	nologin[] = "/etc/nologin";
#endif
int slots;
struct interval {
	int stogo;
	int sint;
} interval[] = {
	4 HOURS,	1 HOURS,
	2 HOURS,	30 MINUTES,
	1 HOURS,	15 MINUTES,
	30 MINUTES,	10 MINUTES,
	15 MINUTES,	5 MINUTES,
	10 MINUTES,	5 MINUTES,
	5 MINUTES,	3 MINUTES,
	2 MINUTES,	30 SECONDS,
	40 SECONDS,	10 SECONDS,
	0 SECONDS,	0 SECONDS
};
char *shutter, *getlogin();
main(argc,argv)
	int argc;
	char **argv;
{
	register i, ufd;
	register char **mess, *f;
	char *ts;
	long sdt;
	int h, m;
	long nowtime;
	FILE *termf;

	shutter = getlogin();
	argc--, argv++;
	while (argc > 0 && (f = argv[0], *f++ == '-')) {
		while (i = *f++) switch (i) {
		case 'k':
			killflg = 0;
			continue;
		case 'r':
			reboot = 1;
			continue;
		case 'h':
			halt = 1;
			continue;
		default:
			fprintf(stderr, "shutdown: '%c' - unknown flag\n", i);
			exit(1);
		}
		argc--, argv++;
	}
	if (argc < 1) {
		printf("Usage: %s [ -krh ] shutdowntime [ message ]\n",
		    argv[0]);
		finish();
	}
	if (geteuid()) {
		fprintf(stderr, "NOT super-user\n");
		finish();
	}
	sdt = getsdt(argv[0]);
	argc--, argv++;
	i = 0;
	while (argc-- > 0)
		if (i < NLOG)
			nolog2[i++] = *argv++;
	nolog2[i] = NULL;
	nowtime = time((long *)0);
	m = ((stogo = sdt - nowtime) + 30)/60;
	h = m/60; 
	m %= 60;
	ts = ctime(&sdt);
	printf("Shutdown at %5.5s (in ", ts+11);
	if (h > 0)
		printf("%d hour%s ", h, h != 1 ? "s" : "");
	printf("%d minute%s) ", m, m != 1 ? "s" : "");
#ifndef DEBUG
	signal(SIGHUP, SIG_IGN);
	signal(SIGQUIT, SIG_IGN);
	signal(SIGINT, SIG_IGN);
#endif
	signal(SIGTERM, finish);
	signal(SIGALRM, do_nothing);
	nice(-20);
	fflush(stdout);
#ifndef DEBUG
	if (i = fork()) {
		printf("[pid %d]\n", i);
		exit(0);
	}
#endif
	sint = 1 HOURS;
	f = "";
	for (;;) {
		for (i = 0; stogo <= interval[i].stogo && interval[i].sint; i++)
			sint = interval[i].sint;
		if (stogo <= NOLOGTIME && nlflag) {
			nlflag = 0;
			nolog(sdt);
		}
		if (sint >= stogo || sint == 0)
			f = "FINAL ";
		ufd = open("/etc/utmp",0);
		nowtime = time((long *) 0);
		while (read(ufd,&utmp,sizeof utmp)==sizeof utmp)
		if (utmp.ut_name[0] &&
		    strncmp(utmp.ut_name, IGNOREUSER, sizeof(utmp.ut_name))) {
			strcpy(term, tpath);
			strncat(term, utmp.ut_line, sizeof utmp.ut_line);
			alarm(3);
#ifdef DEBUG
			if ((termf = stdout) != NULL)
#else
			if ((termf = fopen(term, "w")) != NULL)
#endif
			{
				alarm(0);
				setbuf(termf, tbuf);
				fprintf(termf, "\n\n");
				warn(termf, sdt, nowtime);
				if (sdt - nowtime > 1 MINUTES)
					for (mess = nolog2; *mess; mess++)
						fprintf(termf, "%s ", *mess);
				fputc('\n', termf);
				alarm(5);
#ifdef DEBUG
				fflush(termf);
#else
				fclose(termf);
#endif
				alarm(0);
			}
		}
		if (stogo < 0) {
	printf("\n\007\007System shutdown time has arrived\007\007\n");
			log_entry(sdt);
			unlink(nologin);
			if (!killflg) {
				printf("but you'll have to do it yourself\n");
				finish();
			}
#ifndef DEBUG
			if (reboot)
				execle(REBOOT, "reboot", 0, 0);
			if (halt)
				execle(HALT, "halt", 0, 0);
			kill(1, SIGTERM);	/* sync */
			kill(1, SIGTERM);	/* sync */
			sleep(20);
#else
			printf("EXTERMINATE EXTERMINATE\n");
#endif
			finish();
		}
		stogo = sdt - time((long *) 0);
		if (stogo > 0)
			sleep(sint<stogo ? sint : stogo);
		stogo -= sint;
	}
}

time_t
getsdt(s)
register char *s;
{
	time_t t, t1, tim;
	register char c;
	struct tm *lt;

	if (*s == '+') {
		++s; 
		t = 0;
		for (;;) {
			c = *s++;
			if (!isdigit(c))
				break;
			t = t * 10 + c - '0';
		}
		if (t <= 0)
			t = 5;
		t *= 60;
		tim = time((long *) 0) + t;
		return(tim);
	}
	t = 0;
	while (strlen(s) > 2 && isdigit(*s))
		t = t * 10 + *s++ - '0';
	if (*s == ':')
		s++;
	if (t > 23)
		goto badform;
	tim = t*60;
	t = 0;
	while (isdigit(*s))
		t = t * 10 + *s++ - '0';
	if (t > 59)
		goto badform;
	tim += t; 
	tim *= 60;
	t1 = time((long *) 0);
	lt = localtime(&t1);
	t = lt->tm_sec + lt->tm_min*60 + lt->tm_hour*3600;
	if (tim < t || tim >= (24*3600)) {
		/* before now or after midnight */
		printf("That must be tomorrow\nCan't you wait till then?\n");
		finish();
	}
	return (t1 + tim -t);
badform:
	printf("Bad time format\n");
	finish();
}

warn(term, sdt, nowtime)
	FILE *term;
	long sdt, nowtime;
{
	char *ts;
	register delay = sdt - nowtime;

	if (delay > 8)
		while (delay % 5)
			delay++;

	if (shutter)
		fprintf(term,
		    "\007\007*** System shutdown message from %s!%s ***\n",
		    sysname,shutter);
	else
		fprintf(term,
		    "\007\007*** System shutdown message ***\n");
	ts = ctime(&sdt);
	if (delay> 10 MINUTES)
		fprintf(term, "System going down at %5.5s\n", ts+11);
	else if ( delay > 60 SECONDS ) {
		fprintf(term, "System going down in %d minute%s\n",
		(delay+30)/60, (delay+30)/60 != 1 ? "s" : "");
	} else if ( delay > 0 ) {
		fprintf(term, "System going down in %d second%s\n",
		delay, delay != 1 ? "s" : "");
	} else
		fprintf(term, "System going down IMMEDIATELY\n");
}

nolog(sdt)
	long sdt;
{
	FILE *nologf;
	register char **mess;

	if ((nologf = fopen(nologin, "w")) != NULL) {
		fprintf(nologf, nolog1, (ctime(&sdt)) + 11);
		putc('\t', nologf);
		for (mess = nolog2; *mess; mess++)
			fprintf(nologf, " %s", *mess);
		putc('\n', nologf);
		fclose(nologf);
	}
}

finish()
{
	signal(SIGTERM, SIG_IGN);
	unlink(nologin);
	exit(0);
}

do_nothing()
{

	signal(SIGALRM, do_nothing);
}

/*
 * make an entry in the shutdown log
 */

char *days[] = {
	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
};

char *months[] = {
	"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep",
	"Oct", "Nov", "Dec"
};

log_entry(now)
time_t now;
{
	register FILE *fp;
	register char **mess;
	struct tm *tm, *localtime();

	tm = localtime(&now);
	fp = fopen(LOGFILE, "a");
	if (fp==0)
		return;
	fseek(fp, 0L, 2);
	fprintf(fp, "%02d:%02d  %s %s %2d, %4d.  Shutdown:", tm->tm_hour,
		tm->tm_min, days[tm->tm_wday], months[tm->tm_mon],
		tm->tm_mday, tm->tm_year + 1900);
	for (mess = nolog2; *mess; mess++)
		fprintf(fp, " %s", *mess);
	if (shutter)
		fprintf(fp, " (by %s!%s)", sysname,shutter);
	fputc('\n', fp);
	fclose(fp);
}
Commit	Line	Data
a3180dc7	1	static char *sccsid = "@(#)shutdown.c 4.11 (Berkeley) 82/02/01";
954bb1fe BJ	2
	3	#include <stdio.h>
	4	#include <ctype.h>
	5	#include <signal.h>
	6	#include <utmp.h>
	7	#include <time.h>
	8	#include <sys/types.h>
a3180dc7	9	#include <whoami.h>
954bb1fe BJ	10	/*
	11	* /etc/shutdown when [messages]
	12	*
	13	* allow super users to tell users and remind users
	14	* of iminent shutdown of unix
	15	* and shut it down automatically
	16	* and even reboot or halt the machine if they desire
	17	*
	18	* Ian Johnstone, Sydney, 1977
	19	* Robert Elz, Melbourne, 1978
	20	* Peter Lamb, Melbourne, 1980
	21	* William Joy, Berkeley, 1981
8fa8eeab	22	* Michael Toy, Berkeley, 1981
d3818e48	23	* Dave Presotto, Berkeley, 1981
954bb1fe	24	*/
8fa8eeab BJ	25	#ifdef DEBUG
	26	#define LOGFILE "shutdown.log"
	27	#else
	28	#define LOGFILE "/usr/adm/shutdownlog"
	29	#endif
954bb1fe BJ	30	#define REBOOT "/etc/reboot"
	31	#define HALT "/etc/halt"
	32	#define MAXINTS 20
	33	#define HOURS *3600
	34	#define MINUTES *60
	35	#define SECONDS
ab07e5ac	36	#define NLOG 20 /* no of args possible for message */
954bb1fe	37	#define NOLOGTIME 5 MINUTES
d3818e48	38	#define IGNOREUSER "sleeper"
954bb1fe BJ	39
	40	int do_nothing();
	41	time_t getsdt();
	42
	43	extern char *ctime();
	44	extern struct tm *localtime();
	45
	46	struct utmp utmp;
	47	int sint;
	48	int stogo;
	49	char tpath[] = "/dev/";
	50	int nlflag = 1; /* nolog yet to be done */
	51	int killflg = 1;
	52	int reboot = 0;
	53	int halt = 0;
	54	char term[sizeof tpath + sizeof utmp.ut_line];
	55	char tbuf[BUFSIZ];
	56	char nolog1[] = "\n\nNO LOGINS: System going down at %5.5s\n\n";
	57	char *nolog2[NLOG+1];
	58	#ifdef DEBUG
	59	char nologin[] = "nologin";
	60	#else
	61	char nologin[] = "/etc/nologin";
	62	#endif
	63	int slots;
	64	struct interval {
	65	int stogo;
	66	int sint;
	67	} interval[] = {
	68	4 HOURS, 1 HOURS,
	69	2 HOURS, 30 MINUTES,
	70	1 HOURS, 15 MINUTES,
	71	30 MINUTES, 10 MINUTES,
	72	15 MINUTES, 5 MINUTES,
8fa8eeab BJ	73	10 MINUTES, 5 MINUTES,
8fa8eeab BJ	74	5 MINUTES, 3 MINUTES,
954bb1fe	75	2 MINUTES, 30 SECONDS,
ab07e5ac	76	40 SECONDS, 10 SECONDS,
954bb1fe BJ	77	0 SECONDS, 0 SECONDS
954bb1fe BJ	78	};
8fa8eeab	79	char shutter, getlogin();
954bb1fe BJ	80	main(argc,argv)
	81	int argc;
	82	char **argv;
	83	{
	84	register i, ufd;
	85	register char *mess, f;
	86	char *ts;
	87	long sdt;
	88	int h, m;
	89	long nowtime;
	90	FILE *termf;
	91
8fa8eeab	92	shutter = getlogin();
954bb1fe BJ	93	argc--, argv++;
	94	while (argc > 0 && (f = argv[0], *f++ == '-')) {
	95	while (i = *f++) switch (i) {
	96	case 'k':
	97	killflg = 0;
	98	continue;
	99	case 'r':
	100	reboot = 1;
	101	continue;
	102	case 'h':
	103	halt = 1;
	104	continue;
	105	default:
	106	fprintf(stderr, "shutdown: '%c' - unknown flag\n", i);
	107	exit(1);
	108	}
	109	argc--, argv++;
	110	}
	111	if (argc < 1) {
ab07e5ac	112	printf("Usage: %s [ -krh ] shutdowntime [ message ]\n",
954bb1fe BJ	113	argv[0]);
	114	finish();
	115	}
4004e859 BJ	116	if (geteuid()) {
4004e859 BJ	117	fprintf(stderr, "NOT super-user\n");
7b602762 MT	118	finish();
7b602762 MT	119	}
954bb1fe BJ	120	sdt = getsdt(argv[0]);
	121	argc--, argv++;
	122	i = 0;
	123	while (argc-- > 0)
	124	if (i < NLOG)
	125	nolog2[i++] = *argv++;
	126	nolog2[i] = NULL;
	127	nowtime = time((long *)0);
	128	m = ((stogo = sdt - nowtime) + 30)/60;
	129	h = m/60;
	130	m %= 60;
	131	ts = ctime(&sdt);
8fa8eeab	132	printf("Shutdown at %5.5s (in ", ts+11);
954bb1fe BJ	133	if (h > 0)
954bb1fe BJ	134	printf("%d hour%s ", h, h != 1 ? "s" : "");
8fa8eeab	135	printf("%d minute%s) ", m, m != 1 ? "s" : "");
954bb1fe BJ	136	#ifndef DEBUG
	137	signal(SIGHUP, SIG_IGN);
	138	signal(SIGQUIT, SIG_IGN);
	139	signal(SIGINT, SIG_IGN);
	140	#endif
	141	signal(SIGTERM, finish);
	142	signal(SIGALRM, do_nothing);
	143	nice(-20);
ab07e5ac	144	fflush(stdout);
8fa8eeab	145	#ifndef DEBUG
954bb1fe	146	if (i = fork()) {
8fa8eeab	147	printf("[pid %d]\n", i);
954bb1fe BJ	148	exit(0);
954bb1fe BJ	149	}
8fa8eeab	150	#endif
954bb1fe BJ	151	sint = 1 HOURS;
	152	f = "";
	153	for (;;) {
	154	for (i = 0; stogo <= interval[i].stogo && interval[i].sint; i++)
	155	sint = interval[i].sint;
	156	if (stogo <= NOLOGTIME && nlflag) {
	157	nlflag = 0;
	158	nolog(sdt);
	159	}
	160	if (sint >= stogo \|\| sint == 0)
	161	f = "FINAL ";
	162	ufd = open("/etc/utmp",0);
	163	nowtime = time((long *) 0);
	164	while (read(ufd,&utmp,sizeof utmp)==sizeof utmp)
d3818e48 BJ	165	if (utmp.ut_name[0] &&
d3818e48 BJ	166	strncmp(utmp.ut_name, IGNOREUSER, sizeof(utmp.ut_name))) {
954bb1fe BJ	167	strcpy(term, tpath);
	168	strncat(term, utmp.ut_line, sizeof utmp.ut_line);
	169	alarm(3);
	170	#ifdef DEBUG
8fa8eeab	171	if ((termf = stdout) != NULL)
954bb1fe BJ	172	#else
	173	if ((termf = fopen(term, "w")) != NULL)
	174	#endif
	175	{
	176	alarm(0);
	177	setbuf(termf, tbuf);
	178	fprintf(termf, "\n\n");
	179	warn(termf, sdt, nowtime);
	180	if (sdt - nowtime > 1 MINUTES)
	181	for (mess = nolog2; *mess; mess++)
	182	fprintf(termf, "%s ", *mess);
	183	fputc('\n', termf);
8fa8eeab BJ	184	alarm(5);
	185	#ifdef DEBUG
	186	fflush(termf);
	187	#else
954bb1fe	188	fclose(termf);
8fa8eeab	189	#endif
954bb1fe BJ	190	alarm(0);
	191	}
	192	}
	193	if (stogo < 0) {
	194	printf("\n\007\007System shutdown time has arrived\007\007\n");
8fa8eeab	195	log_entry(sdt);
954bb1fe BJ	196	unlink(nologin);
	197	if (!killflg) {
	198	printf("but you'll have to do it yourself\n");
	199	finish();
	200	}
	201	#ifndef DEBUG
	202	if (reboot)
	203	execle(REBOOT, "reboot", 0, 0);
	204	if (halt)
	205	execle(HALT, "halt", 0, 0);
	206	kill(1, SIGTERM); /* sync */
	207	kill(1, SIGTERM); /* sync */
	208	sleep(20);
	209	#else
	210	printf("EXTERMINATE EXTERMINATE\n");
	211	#endif
	212	finish();
	213	}
	214	stogo = sdt - time((long *) 0);
	215	if (stogo > 0)
	216	sleep(sint<stogo ? sint : stogo);
	217	stogo -= sint;
	218	}
	219	}
	220
	221	time_t
	222	getsdt(s)
	223	register char *s;
	224	{
	225	time_t t, t1, tim;
	226	register char c;
	227	struct tm *lt;
	228
	229	if (*s == '+') {
	230	++s;
	231	t = 0;
	232	for (;;) {
	233	c = *s++;
	234	if (!isdigit(c))
	235	break;
	236	t = t * 10 + c - '0';
	237	}
	238	if (t <= 0)
	239	t = 5;
	240	t *= 60;
	241	tim = time((long *) 0) + t;
	242	return(tim);
	243	}
	244	t = 0;
	245	while (strlen(s) > 2 && isdigit(*s))
	246	t = t * 10 + *s++ - '0';
	247	if (*s == ':')
	248	s++;
	249	if (t > 23)
	250	goto badform;
	251	tim = t*60;
	252	t = 0;
	253	while (isdigit(*s))
	254	t = t * 10 + *s++ - '0';
	255	if (t > 59)
	256	goto badform;
	257	tim += t;
	258	tim *= 60;
	259	t1 = time((long *) 0);
260	lt = localtime(&t1);
261	t = lt->tm_sec + lt->tm_min60 + lt->tm_hour3600;
262	if (tim < t \|\| tim >= (24*3600)) {
263	/* before now or after midnight */
264	printf("That must be tomorrow\nCan't you wait till then?\n");
265	finish();
266	}
267	return (t1 + tim -t);
268	badform:
269	printf("Bad time format\n");
270	finish();
271	}
272
273	warn(term, sdt, nowtime)
274	FILE *term;
275	long sdt, nowtime;
276	{
277	char *ts;
2bfc5a4f	278	register delay = sdt - nowtime;
954bb1fe	279
ab07e5ac BJ	280	if (delay > 8)
	281	while (delay % 5)
	282	delay++;
	283
	284	if (shutter)
	285	fprintf(term,
a3180dc7 BJ	286	"\007\007* System shutdown message from %s!%s *\n",
a3180dc7 BJ	287	sysname,shutter);
ab07e5ac BJ	288	else
	289	fprintf(term,
	290	"\007\007* System shutdown message *\n");
954bb1fe	291	ts = ctime(&sdt);
ab07e5ac	292	if (delay> 10 MINUTES)
954bb1fe	293	fprintf(term, "System going down at %5.5s\n", ts+11);
ab07e5ac	294	else if ( delay > 60 SECONDS ) {
954bb1fe	295	fprintf(term, "System going down in %d minute%s\n",
ab07e5ac BJ	296	(delay+30)/60, (delay+30)/60 != 1 ? "s" : "");
ab07e5ac BJ	297	} else if ( delay > 0 ) {
8fa8eeab	298	fprintf(term, "System going down in %d second%s\n",
ab07e5ac	299	delay, delay != 1 ? "s" : "");
954bb1fe BJ	300	} else
	301	fprintf(term, "System going down IMMEDIATELY\n");
	302	}
	303
	304	nolog(sdt)
	305	long sdt;
	306	{
	307	FILE *nologf;
	308	register char **mess;
	309
	310	if ((nologf = fopen(nologin, "w")) != NULL) {
	311	fprintf(nologf, nolog1, (ctime(&sdt)) + 11);
ab07e5ac	312	putc('\t', nologf);
954bb1fe	313	for (mess = nolog2; *mess; mess++)
ab07e5ac BJ	314	fprintf(nologf, " %s", *mess);
ab07e5ac BJ	315	putc('\n', nologf);
954bb1fe BJ	316	fclose(nologf);
	317	}
	318	}
	319
	320	finish()
	321	{
	322	signal(SIGTERM, SIG_IGN);
	323	unlink(nologin);
	324	exit(0);
	325	}
	326
	327	do_nothing()
	328	{
	329
	330	signal(SIGALRM, do_nothing);
	331	}
8fa8eeab BJ	332
	333	/*
	334	* make an entry in the shutdown log
	335	*/
	336
f8969a9a BJ	337	char *days[] = {
	338	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
	339	};
	340
	341	char *months[] = {
	342	"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep",
	343	"Oct", "Nov", "Dec"
	344	};
	345
	346	log_entry(now)
	347	time_t now;
8fa8eeab	348	{
f8969a9a BJ	349	register FILE *fp;
	350	register char **mess;
	351	struct tm tm, localtime();
8fa8eeab	352
f8969a9a BJ	353	tm = localtime(&now);
f8969a9a BJ	354	fp = fopen(LOGFILE, "a");
3f51f330 BJ	355	if (fp==0)
3f51f330 BJ	356	return;
f8969a9a BJ	357	fseek(fp, 0L, 2);
	358	fprintf(fp, "%02d:%02d %s %s %2d, %4d. Shutdown:", tm->tm_hour,
	359	tm->tm_min, days[tm->tm_wday], months[tm->tm_mon],
	360	tm->tm_mday, tm->tm_year + 1900);
8fa8eeab	361	for (mess = nolog2; *mess; mess++)
f8969a9a	362	fprintf(fp, " %s", *mess);
ab07e5ac	363	if (shutter)
a3180dc7	364	fprintf(fp, " (by %s!%s)", sysname,shutter);
f8969a9a BJ	365	fputc('\n', fp);
f8969a9a BJ	366	fclose(fp);
8fa8eeab	367	}