2 * Copyright (c) 1988, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
33 * @(#) Copyright (c) 1988, 1990, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)shutdown.c 8.4 (Berkeley) 4/28/95
35 * $FreeBSD: src/sbin/shutdown/shutdown.c,v 1.21.2.1 2001/07/30 10:38:08 dd Exp $
36 * $DragonFly: src/sbin/shutdown/shutdown.c,v 1.2 2003/06/17 04:27:34 dillon Exp $
39 #include <sys/param.h>
41 #include <sys/resource.h>
42 #include <sys/syslog.h>
55 #include "pathnames.h"
59 #define _PATH_NOLOGIN "./nologin"
65 #define NOLOG_TIME 5*60
67 int timeleft, timetowait;
86 static time_t offset, shuttime;
87 static int dohalt, dopower, doreboot, killflg, mbuflen, oflag;
88 static char mbuf[BUFSIZ];
89 static const char *nosync, *whom;
91 void badtime __P((void));
92 void die_you_gravy_sucking_pig_dog __P((void));
93 void finish __P((int));
94 void getoffset __P((char *));
95 void loop __P((void));
96 void nolog __P((void));
97 void timeout __P((int));
98 void timewarn __P((int));
99 void usage __P((const char *));
108 int arglen, ch, len, readstdin;
112 errx(1, "NOT super-user");
116 while ((ch = getopt(argc, argv, "-hknopr")) != -1)
149 if (killflg + doreboot + dohalt + dopower > 1)
150 usage("incompatible switches -h, -k, -p and -r");
152 if (oflag && !(dohalt || dopower || doreboot))
153 usage("-o requires -h, -p or -r");
155 if (nosync != NULL && !oflag)
156 usage("-n requires -o");
161 for (p = mbuf, len = sizeof(mbuf); *argv; ++argv) {
162 arglen = strlen(*argv);
163 if ((len -= arglen) <= 2)
167 memmove(p, *argv, arglen);
176 endp = mbuf + sizeof(mbuf) - 2;
178 if (!fgets(p, endp - p + 1, stdin))
180 for (; *p && p < endp; ++p);
188 mbuflen = strlen(mbuf);
191 (void)printf("Shutdown at %.24s.\n", ctime(&shuttime));
193 (void)printf("Shutdown NOW!\n");
195 if (!(whom = getlogin()))
196 whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
199 (void)putc('\n', stdout);
201 (void)setpriority(PRIO_PROCESS, 0, PRIO_MIN);
209 errx(0, "[pid %d]", forkpid);
213 openlog("shutdown", LOG_CONS, LOG_AUTH);
225 if (offset <= NOLOG_TIME) {
232 if (tp->timeleft < offset)
233 (void)sleep((u_int)(offset - tp->timeleft));
235 while (tp->timeleft && offset < tp->timeleft)
238 * Warn now, if going to sleep more than a fifth of
239 * the next wait time.
241 if ((sltime = offset - tp->timeleft)) {
242 if (sltime > (u_int)(tp->timetowait / 5))
248 timewarn(tp->timeleft);
249 if (!logged && tp->timeleft <= NOLOG_TIME) {
253 (void)sleep((u_int)tp->timetowait);
257 die_you_gravy_sucking_pig_dog();
260 static jmp_buf alarmbuf;
262 static const char *restricted_environ[] = {
263 "PATH=" _PATH_STDPATH,
272 static char hostname[MAXHOSTNAMELEN + 1];
274 char wcmd[MAXPATHLEN + 4];
275 extern const char **environ;
278 (void)gethostname(hostname, sizeof(hostname));
280 /* undoc -n option to wall suppresses normal wall banner */
281 (void)snprintf(wcmd, sizeof(wcmd), "%s -n", _PATH_WALL);
282 environ = restricted_environ;
283 if (!(pf = popen(wcmd, "w"))) {
284 syslog(LOG_ERR, "shutdown: can't find %s: %m", _PATH_WALL);
289 "\007*** %sSystem shutdown message from %s@%s ***\007\n",
290 timeleft ? "": "FINAL ", whom, hostname);
292 if (timeleft > 10*60)
293 (void)fprintf(pf, "System going down at %5.5s\n\n",
294 ctime(&shuttime) + 11);
295 else if (timeleft > 59)
296 (void)fprintf(pf, "System going down in %d minute%s\n\n",
297 timeleft / 60, (timeleft > 60) ? "s" : "");
299 (void)fprintf(pf, "System going down in 30 seconds\n\n");
301 (void)fprintf(pf, "System going down IMMEDIATELY\n\n");
304 (void)fwrite(mbuf, sizeof(*mbuf), mbuflen, pf);
307 * play some games, just in case wall doesn't come back
308 * probably unnecessary, given that wall is careful.
310 if (!setjmp(alarmbuf)) {
311 (void)signal(SIGALRM, timeout);
312 (void)alarm((u_int)30);
314 (void)alarm((u_int)0);
315 (void)signal(SIGALRM, SIG_DFL);
323 longjmp(alarmbuf, 1);
327 die_you_gravy_sucking_pig_dog()
329 char *empty_environ[] = { NULL };
331 syslog(LOG_NOTICE, "%s by %s: %s",
332 doreboot ? "reboot" : dohalt ? "halt" : dopower ? "power-down" :
333 "shutdown", whom, mbuf);
336 (void)printf("\r\nSystem shutdown time has arrived\007\007\r\n");
338 (void)printf("\rbut you'll have to do it yourself\r\n");
343 (void)printf("reboot");
345 (void)printf("halt");
347 (void)printf("power-down");
349 (void)printf(" no sync");
350 (void)printf("\nkill -HUP 1\n");
353 (void)kill(1, doreboot ? SIGINT : /* reboot */
354 dohalt ? SIGUSR1 : /* halt */
355 dopower ? SIGUSR2 : /* power-down */
356 SIGTERM); /* single-user */
359 execle(_PATH_REBOOT, "reboot", "-l", nosync,
360 (char *)NULL, empty_environ);
361 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
366 execle(_PATH_HALT, "halt", "-l", nosync,
367 (char *)NULL, empty_environ);
368 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
373 execle(_PATH_HALT, "halt", "-l", "-p", nosync,
374 (char *)NULL, empty_environ);
375 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
379 (void)kill(1, SIGTERM); /* to single-user */
385 #define ATOI2(p) (p[0] - '0') * 10 + (p[1] - '0'); p += 2;
398 if (!strcasecmp(timearg, "now")) { /* now */
404 if (*timearg == '+') { /* +minutes */
405 if (!isdigit(*++timearg))
407 if ((offset = atoi(timearg) * 60) < 0)
409 shuttime = now + offset;
413 /* handle hh:mm by getting rid of the colon */
414 for (p = timearg; *p; ++p)
415 if (!isascii(*p) || !isdigit(*p)) {
416 if (*p == ':' && strlen(p) == 3) {
425 unsetenv("TZ"); /* OUR timezone */
426 lt = localtime(&now); /* current time val */
428 switch(strlen(timearg)) {
430 this_year = lt->tm_year;
431 lt->tm_year = ATOI2(timearg);
433 * check if the specified year is in the next century.
434 * allow for one year of user error as many people will
435 * enter n - 1 at the start of year n.
437 if (lt->tm_year < (this_year % 100) - 1)
439 /* adjust for the year 2000 and beyond */
440 lt->tm_year += (this_year - (this_year % 100));
443 lt->tm_mon = ATOI2(timearg);
444 if (--lt->tm_mon < 0 || lt->tm_mon > 11)
448 lt->tm_mday = ATOI2(timearg);
449 if (lt->tm_mday < 1 || lt->tm_mday > 31)
453 lt->tm_hour = ATOI2(timearg);
454 if (lt->tm_hour < 0 || lt->tm_hour > 23)
456 lt->tm_min = ATOI2(timearg);
457 if (lt->tm_min < 0 || lt->tm_min > 59)
460 if ((shuttime = mktime(lt)) == -1)
462 if ((offset = shuttime - now) < 0)
463 errx(1, "that time is already past.");
470 #define NOMSG "\n\nNO LOGINS: System going down at "
477 (void)unlink(_PATH_NOLOGIN); /* in case linked to another file */
478 (void)signal(SIGINT, finish);
479 (void)signal(SIGHUP, finish);
480 (void)signal(SIGQUIT, finish);
481 (void)signal(SIGTERM, finish);
482 if ((logfd = open(_PATH_NOLOGIN, O_WRONLY|O_CREAT|O_TRUNC,
484 (void)write(logfd, NOMSG, sizeof(NOMSG) - 1);
485 ct = ctime(&shuttime);
486 (void)write(logfd, ct + 11, 5);
487 (void)write(logfd, "\n\n", 2);
488 (void)write(logfd, mbuf, strlen(mbuf));
498 (void)unlink(_PATH_NOLOGIN);
505 errx(1, "bad time format");
514 (void)fprintf(stderr,
515 "usage: shutdown [-] [-h | -p | -r | -k] [-o [-n]]"
516 " time [warning-message ...]\n");