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 1.6 2005/01/02 01:22:49 cpressey 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;
92 void die_you_gravy_sucking_pig_dog(void);
94 void getoffset(char *);
99 void usage(const char *);
102 main(int argc, char **argv)
106 int arglen, ch, len, readstdin;
110 errx(1, "NOT super-user");
114 while ((ch = getopt(argc, argv, "-hknopr")) != -1)
147 if (killflg + doreboot + dohalt + dopower > 1)
148 usage("incompatible switches -h, -k, -p and -r");
150 if (oflag && !(dohalt || dopower || doreboot))
151 usage("-o requires -h, -p or -r");
153 if (nosync != NULL && !oflag)
154 usage("-n requires -o");
159 for (p = mbuf, len = sizeof(mbuf); *argv; ++argv) {
160 arglen = strlen(*argv);
161 if ((len -= arglen) <= 2)
165 memmove(p, *argv, arglen);
174 endp = mbuf + sizeof(mbuf) - 2;
176 if (!fgets(p, endp - p + 1, stdin))
178 for (; *p && p < endp; ++p);
186 mbuflen = strlen(mbuf);
189 printf("Shutdown at %.24s.\n", ctime(&shuttime));
191 printf("Shutdown NOW!\n");
193 if (!(whom = getlogin()))
194 whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
199 setpriority(PRIO_PROCESS, 0, PRIO_MIN);
207 errx(0, "[pid %d]", forkpid);
211 openlog("shutdown", LOG_CONS, LOG_AUTH);
223 if (offset <= NOLOG_TIME) {
230 if (tp->timeleft < offset)
231 sleep((u_int)(offset - tp->timeleft));
233 while (tp->timeleft && offset < tp->timeleft)
236 * Warn now, if going to sleep more than a fifth of
237 * the next wait time.
239 if ((sltime = offset - tp->timeleft)) {
240 if (sltime > (u_int)(tp->timetowait / 5))
246 timewarn(tp->timeleft);
247 if (!logged && tp->timeleft <= NOLOG_TIME) {
251 sleep((u_int)tp->timetowait);
255 die_you_gravy_sucking_pig_dog();
258 static jmp_buf alarmbuf;
260 static const char *restricted_environ[] = {
261 "PATH=" _PATH_STDPATH,
265 extern const char **environ;
268 timewarn(int timeleft)
271 static char hostname[MAXHOSTNAMELEN + 1];
273 char wcmd[MAXPATHLEN + 4];
276 gethostname(hostname, sizeof(hostname));
278 /* undoc -n option to wall suppresses normal wall banner */
279 snprintf(wcmd, sizeof(wcmd), "%s -n", _PATH_WALL);
280 environ = restricted_environ;
281 if (!(pf = popen(wcmd, "w"))) {
282 syslog(LOG_ERR, "shutdown: can't find %s: %m", _PATH_WALL);
287 "\007*** %sSystem shutdown message from %s@%s ***\007\n",
288 timeleft ? "": "FINAL ", whom, hostname);
290 if (timeleft > 10*60)
291 fprintf(pf, "System going down at %5.5s\n\n",
292 ctime(&shuttime) + 11);
293 else if (timeleft > 59)
294 fprintf(pf, "System going down in %d minute%s\n\n",
295 timeleft / 60, (timeleft > 60) ? "s" : "");
297 fprintf(pf, "System going down in 30 seconds\n\n");
299 fprintf(pf, "System going down IMMEDIATELY\n\n");
302 fwrite(mbuf, sizeof(*mbuf), mbuflen, pf);
305 * play some games, just in case wall doesn't come back
306 * probably unnecessary, given that wall is careful.
308 if (!setjmp(alarmbuf)) {
309 signal(SIGALRM, timeout);
313 signal(SIGALRM, SIG_DFL);
318 timeout(int signo __unused)
320 longjmp(alarmbuf, 1);
324 die_you_gravy_sucking_pig_dog(void)
326 char *empty_environ[] = { NULL };
328 syslog(LOG_NOTICE, "%s by %s: %s",
329 doreboot ? "reboot" : dohalt ? "halt" : dopower ? "power-down" :
330 "shutdown", whom, mbuf);
333 printf("\r\nSystem shutdown time has arrived\007\007\r\n");
335 printf("\rbut you'll have to do it yourself\r\n");
344 printf("power-down");
347 printf("\nkill -HUP 1\n");
350 kill(1, doreboot ? SIGINT : /* reboot */
351 dohalt ? SIGUSR1 : /* halt */
352 dopower ? SIGUSR2 : /* power-down */
353 SIGTERM); /* single-user */
356 execle(_PATH_REBOOT, "reboot", "-l", nosync,
357 (char *)NULL, empty_environ);
358 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
363 execle(_PATH_HALT, "halt", "-l", nosync,
364 (char *)NULL, empty_environ);
365 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
370 execle(_PATH_HALT, "halt", "-l", "-p", nosync,
371 (char *)NULL, empty_environ);
372 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
376 kill(1, SIGTERM); /* to single-user */
382 #define ATOI2(p) (p[0] - '0') * 10 + (p[1] - '0'); p += 2;
385 getoffset(char *timearg)
394 if (!strcasecmp(timearg, "now")) { /* now */
400 if (*timearg == '+') { /* +minutes */
401 if (!isdigit(*++timearg))
403 if ((offset = atoi(timearg) * 60) < 0)
405 shuttime = now + offset;
409 /* handle hh:mm by getting rid of the colon */
410 for (p = timearg; *p; ++p)
411 if (!isascii(*p) || !isdigit(*p)) {
412 if (*p == ':' && strlen(p) == 3) {
421 unsetenv("TZ"); /* OUR timezone */
422 lt = localtime(&now); /* current time val */
424 switch(strlen(timearg)) {
426 this_year = lt->tm_year;
427 lt->tm_year = ATOI2(timearg);
429 * check if the specified year is in the next century.
430 * allow for one year of user error as many people will
431 * enter n - 1 at the start of year n.
433 if (lt->tm_year < (this_year % 100) - 1)
435 /* adjust for the year 2000 and beyond */
436 lt->tm_year += (this_year - (this_year % 100));
439 lt->tm_mon = ATOI2(timearg);
440 if (--lt->tm_mon < 0 || lt->tm_mon > 11)
444 lt->tm_mday = ATOI2(timearg);
445 if (lt->tm_mday < 1 || lt->tm_mday > 31)
449 lt->tm_hour = ATOI2(timearg);
450 if (lt->tm_hour < 0 || lt->tm_hour > 23)
452 lt->tm_min = ATOI2(timearg);
453 if (lt->tm_min < 0 || lt->tm_min > 59)
456 if ((shuttime = mktime(lt)) == -1)
458 if ((offset = shuttime - now) < 0)
459 errx(1, "that time is already past.");
466 #define NOMSG "\n\nNO LOGINS: System going down at "
473 unlink(_PATH_NOLOGIN); /* in case linked to another file */
474 signal(SIGINT, finish);
475 signal(SIGHUP, finish);
476 signal(SIGQUIT, finish);
477 signal(SIGTERM, finish);
478 if ((logfd = open(_PATH_NOLOGIN, O_WRONLY|O_CREAT|O_TRUNC,
480 write(logfd, NOMSG, sizeof(NOMSG) - 1);
481 ct = ctime(&shuttime);
482 write(logfd, ct + 11, 5);
483 write(logfd, "\n\n", 2);
484 write(logfd, mbuf, strlen(mbuf));
490 finish(int signo __unused)
493 unlink(_PATH_NOLOGIN);
500 errx(1, "bad time format");
504 usage(const char *cp)
509 "usage: shutdown [-] [-h | -p | -r | -k] [-o [-n]]"
510 " time [warning-message ...]\n");