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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	sbin/shutdown/shutdown.c	Lines:	0	245	0.0 %
Date:	2017-11-07	Branches:	0	171	0.0 %


/*	$OpenBSD: shutdown.c,v 1.46 2017/04/03 20:59:19 fcambus Exp $	*/
/*	$NetBSD: shutdown.c,v 1.9 1995/03/18 15:01:09 cgd Exp $	*/

/*
 * 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. 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.
 */

#include <sys/types.h>
#include <sys/resource.h>
#include <sys/syslog.h>
#include <sys/types.h>
#include <sys/wait.h>

#include <ctype.h>
#include <fcntl.h>
#include <sys/termios.h>
#include <pwd.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include <err.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 }
};
#undef H
#undef M
#undef S

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

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

int
main(int argc, char *argv[])
{
	int arglen, ch, len, readstdin = 0;
	struct passwd *pw;
	char *p, *endp;
	pid_t forkpid;

	if (pledge("stdio rpath wpath cpath getpw tty id proc exec flock", NULL) == -1)
		err(1, "pledge");

#ifndef DEBUG
	if (geteuid())
		errx(1, "NOT super-user");
#endif
	while ((ch = getopt(argc, argv, "dfhknpr-")) != -1)
		switch (ch) {
		case '-':
			readstdin = 1;
			break;
		case 'd':
			dodump = 1;
			break;
		case 'f':
			dofast = 1;
			break;
		case 'h':
			dohalt = 1;
			break;
		case 'k':
			killflg = 1;
			break;
		case 'n':
			nosync = 1;
			break;
		case 'p':
			dopower = 1;
			break;
		case 'r':
			doreboot = 1;
			break;
		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();
	}
	if (doreboot && dopower) {
		(void)fprintf(stderr,
		    "shutdown: incompatible switches -p 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++ = ' ';
			memcpy(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) {
		char *ct = ctime(&shuttime);

		if (ct)
			printf("Shutdown at %.24s.\n", ct);
		else
			printf("Shutdown soon.\n");
	} 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);

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

void
loop(void)
{
	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 (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)
				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 char *restricted_environ[] = {
	"PATH=" _PATH_STDPATH,
	NULL
};

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

	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) {
		struct tm *tm = localtime(&shuttime);

		fprintf(pf, "System going down at %d:%02d\n\n",
		    tm->tm_hour, tm->tm_min);
	} 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(int signo)
{
	longjmp(alarmbuf, 1);		/* XXX signal/longjmp resource leaks */
}

void
die_you_gravy_sucking_pig_dog(void)
{

	syslog(LOG_NOTICE, "%s by %s: %s",
	    doreboot ? "reboot" : dopower ? "power-down" : 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(0);
	}
	if (dofast)
		doitfast();

	if (pledge("stdio rpath wpath cpath tty id proc exec flock", NULL) == -1)
		err(1, "pledge");

#ifdef DEBUG
	if (doreboot)
		(void)printf("reboot");
	else if (dopower)
		(void)printf("power-down");
	else if (dohalt)
		(void)printf("halt");
	if (nosync)
		(void)printf(" no sync");
	if (dofast)
		(void)printf(" no fsck");
	if (dodump)
		(void)printf(" with dump");
	(void)printf("\nkill -HUP 1\n");
#else
	if (dohalt || dopower || doreboot) {
		char *args[10];
		char **arg, *path;

		if (pledge("stdio exec flock rpath cpath wpath", NULL) == -1)
			err(1, "pledge");

		arg = &args[0];
		if (doreboot) {
			path = _PATH_REBOOT;
			*arg++ = "reboot";
		} else {
			path = _PATH_HALT;
			*arg++ = "halt";
		}
		*arg++ = "-l";
		if (dopower)
			*arg++ = "-p";
		if (nosync)
			*arg++ = "-n";
		if (dodump)
			*arg++ = "-d";
		*arg++ = NULL;
		execve(path, args, NULL);
		syslog(LOG_ERR, "shutdown: can't exec %s: %m.", path);
		warn("%s", path);
	}
	if (access(_PATH_RC, R_OK) != -1) {
		pid_t pid;
		struct termios t;
		int fd;

		switch ((pid = fork())) {
		case -1:
			break;
		case 0:
			if (revoke(_PATH_CONSOLE) == -1)
				perror("revoke");
			if (setsid() == -1)
				perror("setsid");
			fd = open(_PATH_CONSOLE, O_RDWR);
			if (fd == -1)
				perror("open");
			dup2(fd, 0);
			dup2(fd, 1);
			dup2(fd, 2);
			if (fd > 2)
				close(fd);

			/* At a minimum... */
			tcgetattr(0, &t);
			t.c_oflag |= (ONLCR | OPOST);
			tcsetattr(0, TCSANOW, &t);

			execl(_PATH_BSHELL, "sh", _PATH_RC, "shutdown", (char *)NULL);
			_exit(1);
		default:
			waitpid(pid, NULL, 0);
		}
	}
	(void)kill(1, SIGTERM);		/* to single user */
#endif
	finish(0);
}

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

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

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

	(void)time(&now);
	if (*timearg == '+') {				/* +minutes */
		const char *errstr;

		offset = strtonum(++timearg, 0, INT_MAX, &errstr);
		if (errstr)
			badtime();
		offset *= 60;
		shuttime = now + offset;
		return;
	}

	/* handle hh:mm by getting rid of the colon */
	for (p = timearg; *p; ++p) {
		if (!isascii((unsigned char)*p) || !isdigit((unsigned char)*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();
	}
}

void
doitfast(void)
{
	int fastfd;

	if ((fastfd = open(_PATH_FASTBOOT, O_WRONLY|O_CREAT|O_TRUNC,
	    0664)) >= 0) {
		dprintf(fastfd, "fastboot file for fsck\n");
		close(fastfd);
	}
}

void
nolog(void)
{
	int logfd;
	struct tm *tm;

	(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);
	tm = localtime(&shuttime);
	if (tm && (logfd = open(_PATH_NOLOGIN, O_WRONLY|O_CREAT|O_TRUNC,
	    0664)) >= 0) {
		dprintf(logfd,
		    "\n\nNO LOGINS: System going down at %d:%02d\n\n",
		    tm->tm_hour, tm->tm_min);
		close(logfd);
	}
}

void
finish(int signo)
{
	if (!killflg)
		(void)unlink(_PATH_NOLOGIN);
	if (signo == 0)
		exit(0);
	else
		_exit(0);
}

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

void
usage(void)
{
	fprintf(stderr,
	    "usage: shutdown [-] [-dfhknpr] time [warning-message ...]\n");
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: shutdown.c,v 1.46 2017/04/03 20:59:19 fcambus Exp $ */
2			/* $NetBSD: shutdown.c,v 1.9 1995/03/18 15:01:09 cgd Exp $ */
3
4			/*
5			* Copyright (c) 1988, 1990, 1993
6			* The Regents of the University of California. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			* 1. Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13			* 2. Redistributions in binary form must reproduce the above copyright
14			* notice, this list of conditions and the following disclaimer in the
15			* documentation and/or other materials provided with the distribution.
16			* 3. Neither the name of the University nor the names of its contributors
17			* may be used to endorse or promote products derived from this software
18			* without specific prior written permission.
19			*
20			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30			* SUCH DAMAGE.
31			*/
32
33			#include <sys/types.h>
34			#include <sys/resource.h>
35			#include <sys/syslog.h>
36			#include <sys/types.h>
37			#include <sys/wait.h>
38
39			#include <ctype.h>
40			#include <fcntl.h>
41			#include <sys/termios.h>
42			#include <pwd.h>
43			#include <setjmp.h>
44			#include <signal.h>
45			#include <stdio.h>
46			#include <stdlib.h>
47			#include <string.h>
48			#include <time.h>
49			#include <unistd.h>
50			#include <limits.h>
51			#include <errno.h>
52			#include <err.h>
53
54			#include "pathnames.h"
55
56			#ifdef DEBUG
57			#undef _PATH_NOLOGIN
58			#define _PATH_NOLOGIN "./nologin"
59			#undef _PATH_FASTBOOT
60			#define _PATH_FASTBOOT "./fastboot"
61			#endif
62
63			#define H 6060
64			#define M *60
65			#define S *1
66			#define NOLOG_TIME 5*60
67			struct interval {
68			int timeleft, timetowait;
69			} tlist[] = {
70			{ 10 H, 5 H },
71			{ 5 H, 3 H },
72			{ 2 H, 1 H },
73			{ 1 H, 30 M },
74			{ 30 M, 10 M },
75			{ 20 M, 10 M },
76			{ 10 M, 5 M },
77			{ 5 M, 3 M },
78			{ 2 M, 1 M },
79			{ 1 M, 30 S },
80			{ 30 S, 30 S },
81			{ 0, 0 }
82			};
83			#undef H
84			#undef M
85			#undef S
86
87			static time_t offset, shuttime;
88			static int dofast, dohalt, doreboot, dopower, dodump, mbuflen, nosync;
89			static sig_atomic_t killflg;
90			static char *whom, mbuf[BUFSIZ];
91
92			void badtime(void);
93			void __dead die_you_gravy_sucking_pig_dog(void);
94			void doitfast(void);
95			void __dead finish(int);
96			void getoffset(char *);
97			void __dead loop(void);
98			void nolog(void);
99			void timeout(int);
100			void timewarn(int);
101			void usage(void);
102
103			int
104			main(int argc, char *argv[])
105			{
106			int arglen, ch, len, readstdin = 0;
107			struct passwd *pw;
108			char p, endp;
109			pid_t forkpid;
110
111			if (pledge("stdio rpath wpath cpath getpw tty id proc exec flock", NULL) == -1)
112			err(1, "pledge");
113
114			#ifndef DEBUG
115			if (geteuid())
116			errx(1, "NOT super-user");
117			#endif
118			while ((ch = getopt(argc, argv, "dfhknpr-")) != -1)
119			switch (ch) {
120			case '-':
121			readstdin = 1;
122			break;
123			case 'd':
124			dodump = 1;
125			break;
126			case 'f':
127			dofast = 1;
128			break;
129			case 'h':
130			dohalt = 1;
131			break;
132			case 'k':
133			killflg = 1;
134			break;
135			case 'n':
136			nosync = 1;
137			break;
138			case 'p':
139			dopower = 1;
140			break;
141			case 'r':
142			doreboot = 1;
143			break;
144			default:
145			usage();
146			}
147			argc -= optind;
148			argv += optind;
149
150			if (argc < 1)
151			usage();
152
153			if (dofast && nosync) {
154			(void)fprintf(stderr,
155			"shutdown: incompatible switches -f and -n.\n");
156			usage();
157			}
158			if (doreboot && dohalt) {
159			(void)fprintf(stderr,
160			"shutdown: incompatible switches -h and -r.\n");
161			usage();
162			}
163			if (doreboot && dopower) {
164			(void)fprintf(stderr,
165			"shutdown: incompatible switches -p and -r.\n");
166			usage();
167			}
168			getoffset(*argv++);
169
170			if (*argv) {
171			for (p = mbuf, len = sizeof(mbuf); *argv; ++argv) {
172			arglen = strlen(*argv);
173			if ((len -= arglen) <= 2)
174			break;
175			if (p != mbuf)
176			*p++ = ' ';
177			memcpy(p, *argv, arglen);
178			p += arglen;
179			}
180			*p = '\n';
181			*++p = '\0';
182			}
183
184			if (readstdin) {
185			p = mbuf;
186			endp = mbuf + sizeof(mbuf) - 2;
187			for (;;) {
188			if (!fgets(p, endp - p + 1, stdin))
189			break;
190			for (; *p && p < endp; ++p)
191			;
192			if (p == endp) {
193			*p = '\n';
194			*++p = '\0';
195			break;
196			}
197			}
198			}
199			mbuflen = strlen(mbuf);
200
201			if (offset) {
202			char *ct = ctime(&shuttime);
203
204			if (ct)
205			printf("Shutdown at %.24s.\n", ct);
206			else
207			printf("Shutdown soon.\n");
208			} else
209			(void)printf("Shutdown NOW!\n");
210
211			if (!(whom = getlogin()))
212			whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
213
214			#ifdef DEBUG
215			(void)putc('\n', stdout);
216			#else
217			(void)setpriority(PRIO_PROCESS, 0, PRIO_MIN);
218
219			forkpid = fork();
220			if (forkpid == -1)
221			err(1, "fork");
222			if (forkpid) {
223			(void)printf("shutdown: [pid %ld]\n", (long)forkpid);
224			exit(0);
225			}
226			setsid();
227			#endif
228			openlog("shutdown", LOG_CONS, LOG_AUTH);
229			loop();
230			/* NOTREACHED */
231			}
232
233			void
234			loop(void)
235			{
236			struct interval *tp;
237			u_int sltime;
238			int logged;
239
240			if (offset <= NOLOG_TIME) {
241			logged = 1;
242			nolog();
243			} else
244			logged = 0;
245			tp = tlist;
246			if (tp->timeleft < offset)
247			(void)sleep((u_int)(offset - tp->timeleft));
248			else {
249			while (offset < tp->timeleft)
250			++tp;
251			/*
252			* Warn now, if going to sleep more than a fifth of
253			* the next wait time.
254			*/
255			if ((sltime = offset - tp->timeleft)) {
256			if (sltime > tp->timetowait / 5)
257			timewarn(offset);
258			(void)sleep(sltime);
259			}
260			}
261			for (;; ++tp) {
262			timewarn(tp->timeleft);
263			if (!logged && tp->timeleft <= NOLOG_TIME) {
264			logged = 1;
265			nolog();
266			}
267			(void)sleep((u_int)tp->timetowait);
268			if (!tp->timeleft)
269			break;
270			}
271			die_you_gravy_sucking_pig_dog();
272			}
273
274			static jmp_buf alarmbuf;
275
276			static char *restricted_environ[] = {
277			"PATH=" _PATH_STDPATH,
278			NULL
279			};
280
281			void
282			timewarn(int timeleft)
283			{
284			static char hostname[HOST_NAME_MAX+1];
285			char wcmd[PATH_MAX + 4];
286			extern char **environ;
287			static int first;
288			FILE *pf;
289
290			if (!first++)
291			(void)gethostname(hostname, sizeof(hostname));
292
293			/* undoc -n option to wall suppresses normal wall banner */
294			(void)snprintf(wcmd, sizeof(wcmd), "%s -n", _PATH_WALL);
295			environ = restricted_environ;
296			if (!(pf = popen(wcmd, "w"))) {
297			syslog(LOG_ERR, "shutdown: can't find %s: %m", _PATH_WALL);
298			return;
299			}
300
301			(void)fprintf(pf,
302			"\007* %sSystem shutdown message from %s@%s *\007\n",
303			timeleft ? "": "FINAL ", whom, hostname);
304
305			if (timeleft > 10*60) {
306			struct tm *tm = localtime(&shuttime);
307
308			fprintf(pf, "System going down at %d:%02d\n\n",
309			tm->tm_hour, tm->tm_min);
310			} else if (timeleft > 59)
311			(void)fprintf(pf, "System going down in %d minute%s\n\n",
312			timeleft / 60, (timeleft > 60) ? "s" : "");
313			else if (timeleft)
314			(void)fprintf(pf, "System going down in 30 seconds\n\n");
315			else
316			(void)fprintf(pf, "System going down IMMEDIATELY\n\n");
317
318			if (mbuflen)
319			(void)fwrite(mbuf, sizeof(*mbuf), mbuflen, pf);
320
321			/*
322			* play some games, just in case wall doesn't come back
323			* probably unnecessary, given that wall is careful.
324			*/
325			if (!setjmp(alarmbuf)) {
326			(void)signal(SIGALRM, timeout);
327			(void)alarm((u_int)30);
328			(void)pclose(pf);
329			(void)alarm((u_int)0);
330			(void)signal(SIGALRM, SIG_DFL);
331			}
332			}
333
334			void
335			timeout(int signo)
336			{
337			longjmp(alarmbuf, 1); /* XXX signal/longjmp resource leaks */
338			}
339
340			void
341			die_you_gravy_sucking_pig_dog(void)
342			{
343
344			syslog(LOG_NOTICE, "%s by %s: %s",
345			doreboot ? "reboot" : dopower ? "power-down" : dohalt ? "halt" :
346			"shutdown", whom, mbuf);
347			(void)sleep(2);
348
349			(void)printf("\r\nSystem shutdown time has arrived\007\007\r\n");
350			if (killflg) {
351			(void)printf("\rbut you'll have to do it yourself\r\n");
352			finish(0);
353			}
354			if (dofast)
355			doitfast();
356
357			if (pledge("stdio rpath wpath cpath tty id proc exec flock", NULL) == -1)
358			err(1, "pledge");
359
360			#ifdef DEBUG
361			if (doreboot)
362			(void)printf("reboot");
363			else if (dopower)
364			(void)printf("power-down");
365			else if (dohalt)
366			(void)printf("halt");
367			if (nosync)
368			(void)printf(" no sync");
369			if (dofast)
370			(void)printf(" no fsck");
371			if (dodump)
372			(void)printf(" with dump");
373			(void)printf("\nkill -HUP 1\n");
374			#else
375			if (dohalt \|\| dopower \|\| doreboot) {
376			char *args[10];
377			char *arg, path;
378
379			if (pledge("stdio exec flock rpath cpath wpath", NULL) == -1)
380			err(1, "pledge");
381
382			arg = &args[0];
383			if (doreboot) {
384			path = _PATH_REBOOT;
385			*arg++ = "reboot";
386			} else {
387			path = _PATH_HALT;
388			*arg++ = "halt";
389			}
390			*arg++ = "-l";
391			if (dopower)
392			*arg++ = "-p";
393			if (nosync)
394			*arg++ = "-n";
395			if (dodump)
396			*arg++ = "-d";
397			*arg++ = NULL;
398			execve(path, args, NULL);
399			syslog(LOG_ERR, "shutdown: can't exec %s: %m.", path);
400			warn("%s", path);
401			}
402			if (access(_PATH_RC, R_OK) != -1) {
403			pid_t pid;
404			struct termios t;
405			int fd;
406
407			switch ((pid = fork())) {
408			case -1:
409			break;
410			case 0:
411			if (revoke(_PATH_CONSOLE) == -1)
412			perror("revoke");
413			if (setsid() == -1)
414			perror("setsid");
415			fd = open(_PATH_CONSOLE, O_RDWR);
416			if (fd == -1)
417			perror("open");
418			dup2(fd, 0);
419			dup2(fd, 1);
420			dup2(fd, 2);
421			if (fd > 2)
422			close(fd);
423
424			/* At a minimum... */
425			tcgetattr(0, &t);
426			t.c_oflag \|= (ONLCR \| OPOST);
427			tcsetattr(0, TCSANOW, &t);
428
429			execl(_PATH_BSHELL, "sh", _PATH_RC, "shutdown", (char *)NULL);
430			_exit(1);
431			default:
432			waitpid(pid, NULL, 0);
433			}
434			}
435			(void)kill(1, SIGTERM); /* to single user */
436			#endif
437			finish(0);
438			}
439
440			#define ATOI2(p) (p[0] - '0') * 10 + (p[1] - '0'); p += 2;
441
442			void
443			getoffset(char *timearg)
444			{
445			struct tm *lt;
446			int this_year;
447			time_t now;
448			char *p;
449
450			if (!strcasecmp(timearg, "now")) { /* now */
451			offset = 0;
452			return;
453			}
454
455			(void)time(&now);
456			if (timearg == '+') { / +minutes */
457			const char *errstr;
458
459			offset = strtonum(++timearg, 0, INT_MAX, &errstr);
460			if (errstr)
461			badtime();
462			offset *= 60;
463			shuttime = now + offset;
464			return;
465			}
466
467			/* handle hh:mm by getting rid of the colon */
468			for (p = timearg; *p; ++p) {
469			if (!isascii((unsigned char)p) \|\| !isdigit((unsigned char)p)) {
470			if (*p == ':' && strlen(p) == 3) {
471			p[0] = p[1];
472			p[1] = p[2];
473			p[2] = '\0';
474			} else
475			badtime();
476			}
477			}
478
479			unsetenv("TZ"); /* OUR timezone */
480			lt = localtime(&now); /* current time val */
481
482			switch (strlen(timearg)) {
483			case 10:
484			this_year = lt->tm_year;
485			lt->tm_year = ATOI2(timearg);
486			/*
487			* check if the specified year is in the next century.
488			* allow for one year of user error as many people will
489			* enter n - 1 at the start of year n.
490			*/
491			if (lt->tm_year < (this_year % 100) - 1)
492			lt->tm_year += 100;
493			/* adjust for the year 2000 and beyond */
494			lt->tm_year += (this_year - (this_year % 100));
495			/* FALLTHROUGH */
496			case 8:
497			lt->tm_mon = ATOI2(timearg);
498			if (--lt->tm_mon < 0 \|\| lt->tm_mon > 11)
499			badtime();
500			/* FALLTHROUGH */
501			case 6:
502			lt->tm_mday = ATOI2(timearg);
503			if (lt->tm_mday < 1 \|\| lt->tm_mday > 31)
504			badtime();
505			/* FALLTHROUGH */
506			case 4:
507			lt->tm_hour = ATOI2(timearg);
508			if (lt->tm_hour < 0 \|\| lt->tm_hour > 23)
509			badtime();
510			lt->tm_min = ATOI2(timearg);
511			if (lt->tm_min < 0 \|\| lt->tm_min > 59)
512			badtime();
513			lt->tm_sec = 0;
514			if ((shuttime = mktime(lt)) == -1)
515			badtime();
516			if ((offset = shuttime - now) < 0)
517			errx(1, "that time is already past.");
518			break;
519			default:
520			badtime();
521			}
522			}
523
524			void
525			doitfast(void)
526			{
527			int fastfd;
528
529			if ((fastfd = open(_PATH_FASTBOOT, O_WRONLY\|O_CREAT\|O_TRUNC,
530			0664)) >= 0) {
531			dprintf(fastfd, "fastboot file for fsck\n");
532			close(fastfd);
533			}
534			}
535
536			void
537			nolog(void)
538			{
539			int logfd;
540			struct tm *tm;
541
542			(void)unlink(_PATH_NOLOGIN); /* in case linked to another file */
543			(void)signal(SIGINT, finish);
544			(void)signal(SIGHUP, finish);
545			(void)signal(SIGQUIT, finish);
546			(void)signal(SIGTERM, finish);
547			tm = localtime(&shuttime);
548			if (tm && (logfd = open(_PATH_NOLOGIN, O_WRONLY\|O_CREAT\|O_TRUNC,
549			0664)) >= 0) {
550			dprintf(logfd,
551			"\n\nNO LOGINS: System going down at %d:%02d\n\n",
552			tm->tm_hour, tm->tm_min);
553			close(logfd);
554			}
555			}
556
557			void
558			finish(int signo)
559			{
560			if (!killflg)
561			(void)unlink(_PATH_NOLOGIN);
562			if (signo == 0)
563			exit(0);
564			else
565			_exit(0);
566			}
567
568			void
569			badtime(void)
570			{
571			errx(1, "bad time format.");
572			}
573
574			void
575			usage(void)
576			{
577			fprintf(stderr,
578			"usage: shutdown [-] [-dfhknpr] time [warning-message ...]\n");
579			exit(1);
580			}