[unix-history] / usr / src / sbin / reboot / halt.c

static	char *sccsid = "@(#)halt.c	4.7 (Berkeley) %G%";
/*
 * Halt
 */
#include <stdio.h>
#include <sys/reboot.h>
#include <sys/types.h>
#include <time.h>
#include <errno.h>
#include <signal.h>

#define SHUTDOWNLOG "/usr/adm/shutdownlog"

main(argc, argv)
	int argc;
	char **argv;
{
	int howto;
	char *ttyn = (char *)ttyname(2);
	register i;
	register qflag = 0;

	howto = RB_HALT;
	argc--, argv++;
	while (argc > 0) {
		if (!strcmp(*argv, "-n"))
			howto |= RB_NOSYNC;
		else if (!strcmp(*argv, "-y"))
			ttyn = 0;
		else if (!strcmp(*argv, "-q"))
			qflag++;
		else {
			fprintf(stderr, "usage: halt [ -n ]\n");
			exit(1);
		}
		argc--, argv++;
	}
	if (ttyn && *(ttyn+strlen("/dev/tty")) == 'd') {
		fprintf(stderr, "halt: dangerous on a dialup; use ``halt -y'' if you are really sure\n");
		exit(1);
	}

	signal(SIGHUP, SIG_IGN);		/* for network connections */
	if (kill(1, SIGTSTP) == -1) {
		fprintf(stderr, "reboot: can't idle init\n");
		exit(1);
	}

	if (!qflag) for (i = 1; ; i++) {
		if (kill(-1, SIGKILL) == -1) {
			extern int errno;

			if (errno == ESRCH)
				break;

			perror("reboot: kill");
			kill(1, SIGHUP);
			exit(1);
		}
		if (i > 5) {
	fprintf(stderr, "CAUTION: some process(es) wouldn't die\n");
			break;
		}
		setalarm(2 * i);
		pause();
	}

	if ((howto & RB_NOSYNC) == 0)
		log_entry();
	if (!qflag) {
		if ((howto & RB_NOSYNC)==0) {
			markdown();
			sync();
			sync();
		}
		setalarm(5);
		pause();
	}
	syscall(55, howto);
	perror("reboot");
}

dingdong()
{
	/* RRRIIINNNGGG RRRIIINNNGGG */
}

setalarm(n)
{
	signal(SIGALRM, dingdong);
	alarm(n);
}

#include <utmp.h>
#define SCPYN(a, b)	strncpy(a, b, sizeof(a))
char	wtmpf[]	= "/usr/adm/wtmp";
struct utmp wtmp;

markdown()
{
	register f = open(wtmpf, 1);
	if (f >= 0) {
		lseek(f, 0L, 2);
		SCPYN(wtmp.ut_line, "~");
		SCPYN(wtmp.ut_name, "shutdown");
		time(&wtmp.ut_time);
		write(f, (char *)&wtmp, sizeof(wtmp));
		close(f);
	}
}

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()
{
	FILE *fp;
	struct tm *tm, *localtime();
	time_t now;

	time(&now);
	tm = localtime(&now);
	fp = fopen(SHUTDOWNLOG, "a");
	if (fp == NULL)
		return;
	fseek(fp, 0L, 2);
	fprintf(fp, "%02d:%02d  %s %s %2d, %4d.  Halted.\n", tm->tm_hour,
		tm->tm_min, days[tm->tm_wday], months[tm->tm_mon],
		tm->tm_mday, tm->tm_year + 1900);
	fclose(fp);
}
Commit	Line	Data
4f509481	1	static char *sccsid = "@(#)halt.c 4.7 (Berkeley) %G%";
a2588a32 BJ	2	/*
	3	* Halt
	4	*/
	5	#include <stdio.h>
	6	#include <sys/reboot.h>
ccb2b0b8 BJ	7	#include <sys/types.h>
ccb2b0b8 BJ	8	#include <time.h>
fe6cb666 BJ	9	#include <errno.h>
fe6cb666 BJ	10	#include <signal.h>
a2588a32	11
ccb2b0b8 BJ	12	#define SHUTDOWNLOG "/usr/adm/shutdownlog"
ccb2b0b8 BJ	13
a2588a32 BJ	14	main(argc, argv)
	15	int argc;
	16	char **argv;
	17	{
	18	int howto;
037df60e	19	char ttyn = (char )ttyname(2);
fe6cb666	20	register i;
821f38b7	21	register qflag = 0;
a2588a32 BJ	22
	23	howto = RB_HALT;
	24	argc--, argv++;
	25	while (argc > 0) {
	26	if (!strcmp(*argv, "-n"))
	27	howto \|= RB_NOSYNC;
037df60e BJ	28	else if (!strcmp(*argv, "-y"))
037df60e BJ	29	ttyn = 0;
fe6cb666 BJ	30	else if (!strcmp(*argv, "-q"))
fe6cb666 BJ	31	qflag++;
a2588a32 BJ	32	else {
	33	fprintf(stderr, "usage: halt [ -n ]\n");
	34	exit(1);
	35	}
	36	argc--, argv++;
	37	}
037df60e BJ	38	if (ttyn && *(ttyn+strlen("/dev/tty")) == 'd') {
	39	fprintf(stderr, "halt: dangerous on a dialup; use ``halt -y'' if you are really sure\n");
	40	exit(1);
	41	}
fe6cb666	42
4f509481	43	signal(SIGHUP, SIG_IGN); /* for network connections */
fe6cb666 BJ	44	if (kill(1, SIGTSTP) == -1) {
	45	fprintf(stderr, "reboot: can't idle init\n");
	46	exit(1);
	47	}
	48
	49	if (!qflag) for (i = 1; ; i++) {
	50	if (kill(-1, SIGKILL) == -1) {
	51	extern int errno;
	52
	53	if (errno == ESRCH)
	54	break;
	55
	56	perror("reboot: kill");
	57	kill(1, SIGHUP);
	58	exit(1);
	59	}
	60	if (i > 5) {
	61	fprintf(stderr, "CAUTION: some process(es) wouldn't die\n");
	62	break;
	63	}
	64	setalarm(2 * i);
	65	pause();
	66	}
	67
ccb2b0b8 BJ	68	if ((howto & RB_NOSYNC) == 0)
ccb2b0b8 BJ	69	log_entry();
fe6cb666 BJ	70	if (!qflag) {
	71	if ((howto & RB_NOSYNC)==0) {
	72	markdown();
	73	sync();
	74	sync();
	75	}
	76	setalarm(5);
	77	pause();
	78	}
a2588a32 BJ	79	syscall(55, howto);
	80	perror("reboot");
	81	}
fe6cb666 BJ	82
	83	dingdong()
	84	{
	85	/* RRRIIINNNGGG RRRIIINNNGGG */
	86	}
	87
	88	setalarm(n)
	89	{
	90	signal(SIGALRM, dingdong);
	91	alarm(n);
	92	}
	93
	94	#include <utmp.h>
	95	#define SCPYN(a, b) strncpy(a, b, sizeof(a))
	96	char wtmpf[] = "/usr/adm/wtmp";
	97	struct utmp wtmp;
	98
	99	markdown()
	100	{
	101	register f = open(wtmpf, 1);
	102	if (f >= 0) {
	103	lseek(f, 0L, 2);
	104	SCPYN(wtmp.ut_line, "~");
	105	SCPYN(wtmp.ut_name, "shutdown");
	106	time(&wtmp.ut_time);
	107	write(f, (char *)&wtmp, sizeof(wtmp));
	108	close(f);
	109	}
	110	}
ccb2b0b8 BJ	111
	112	char *days[] = {
	113	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
	114	};
	115
	116	char *months[] = {
	117	"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep",
	118	"Oct", "Nov", "Dec"
	119	};
	120
	121	log_entry()
	122	{
	123	FILE *fp;
	124	struct tm tm, localtime();
	125	time_t now;
	126
	127	time(&now);
	128	tm = localtime(&now);
	129	fp = fopen(SHUTDOWNLOG, "a");
31b4d3e1 BJ	130	if (fp == NULL)
31b4d3e1 BJ	131	return;
ccb2b0b8 BJ	132	fseek(fp, 0L, 2);
	133	fprintf(fp, "%02d:%02d %s %s %2d, %4d. Halted.\n", tm->tm_hour,
	134	tm->tm_min, days[tm->tm_wday], months[tm->tm_mon],
	135	tm->tm_mday, tm->tm_year + 1900);
	136	fclose(fp);
	137	}