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

static	char *sccsid = "@(#)halt.c	4.5 (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;

	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);
	}

	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
31b4d3e1	1	static char *sccsid = "@(#)halt.c 4.5 (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 BJ	20	register i;
fe6cb666 BJ	21	register qflag;
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 BJ	42
	43	if (kill(1, SIGTSTP) == -1) {
	44	fprintf(stderr, "reboot: can't idle init\n");
	45	exit(1);
	46	}
	47
	48	if (!qflag) for (i = 1; ; i++) {
	49	if (kill(-1, SIGKILL) == -1) {
	50	extern int errno;
	51
	52	if (errno == ESRCH)
	53	break;
	54
	55	perror("reboot: kill");
	56	kill(1, SIGHUP);
	57	exit(1);
	58	}
	59	if (i > 5) {
	60	fprintf(stderr, "CAUTION: some process(es) wouldn't die\n");
	61	break;
	62	}
	63	setalarm(2 * i);
	64	pause();
	65	}
	66
ccb2b0b8 BJ	67	if ((howto & RB_NOSYNC) == 0)
ccb2b0b8 BJ	68	log_entry();
fe6cb666 BJ	69	if (!qflag) {
	70	if ((howto & RB_NOSYNC)==0) {
	71	markdown();
	72	sync();
	73	sync();
	74	}
	75	setalarm(5);
	76	pause();
	77	}
a2588a32 BJ	78	syscall(55, howto);
	79	perror("reboot");
	80	}
fe6cb666 BJ	81
	82	dingdong()
	83	{
	84	/* RRRIIINNNGGG RRRIIINNNGGG */
	85	}
	86
	87	setalarm(n)
	88	{
	89	signal(SIGALRM, dingdong);
	90	alarm(n);
	91	}
	92
	93	#include <utmp.h>
	94	#define SCPYN(a, b) strncpy(a, b, sizeof(a))
	95	char wtmpf[] = "/usr/adm/wtmp";
	96	struct utmp wtmp;
	97
	98	markdown()
	99	{
	100	register f = open(wtmpf, 1);
	101	if (f >= 0) {
	102	lseek(f, 0L, 2);
	103	SCPYN(wtmp.ut_line, "~");
	104	SCPYN(wtmp.ut_name, "shutdown");
	105	time(&wtmp.ut_time);
	106	write(f, (char *)&wtmp, sizeof(wtmp));
	107	close(f);
	108	}
	109	}
ccb2b0b8 BJ	110
	111	char *days[] = {
	112	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
	113	};
	114
	115	char *months[] = {
	116	"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep",
	117	"Oct", "Nov", "Dec"
	118	};
	119
	120	log_entry()
	121	{
	122	FILE *fp;
	123	struct tm tm, localtime();
	124	time_t now;
	125
	126	time(&now);
	127	tm = localtime(&now);
	128	fp = fopen(SHUTDOWNLOG, "a");
31b4d3e1 BJ	129	if (fp == NULL)
31b4d3e1 BJ	130	return;
ccb2b0b8 BJ	131	fseek(fp, 0L, 2);
	132	fprintf(fp, "%02d:%02d %s %s %2d, %4d. Halted.\n", tm->tm_hour,
	133	tm->tm_min, days[tm->tm_wday], months[tm->tm_mon],
	134	tm->tm_mday, tm->tm_year + 1900);
	135	fclose(fp);
	136	}