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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 static const char copyright[] =
33 "@(#) Copyright (c) 1988, 1990, 1993\n\
34 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)shutdown.c 8.4 (Berkeley) 4/28/95";
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
44 #include <sys/param.h>
46 #include <sys/resource.h>
47 #include <sys/syslog.h>
63 #define _PATH_NOLOGIN "./nologin"
69 #define NOLOG_TIME 5*60
71 int timeleft, timetowait;
90 static time_t offset, shuttime;
91 static int dohalt, dopower, doreboot, killflg, mbuflen, oflag;
92 static char mbuf[BUFSIZ];
93 static const char *nosync, *whom;
96 void die_you_gravy_sucking_pig_dog(void);
98 void getoffset(char *);
103 void usage(const char *);
105 extern const char **environ;
108 main(int argc, char **argv)
112 int arglen, ch, len, readstdin;
116 errx(1, "NOT super-user");
120 while ((ch = getopt(argc, argv, "-hknopr")) != -1)
153 if (killflg + doreboot + dohalt + dopower > 1)
154 usage("incompatible switches -h, -k, -p and -r");
156 if (oflag && !(dohalt || dopower || doreboot))
157 usage("-o requires -h, -p or -r");
159 if (nosync != NULL && !oflag)
160 usage("-n requires -o");
165 for (p = mbuf, len = sizeof(mbuf); *argv; ++argv) {
166 arglen = strlen(*argv);
167 if ((len -= arglen) <= 2)
171 memmove(p, *argv, arglen);
180 endp = mbuf + sizeof(mbuf) - 2;
182 if (!fgets(p, endp - p + 1, stdin))
184 for (; *p && p < endp; ++p);
192 mbuflen = strlen(mbuf);
195 (void)printf("Shutdown at %.24s.\n", ctime(&shuttime));
197 (void)printf("Shutdown NOW!\n");
199 if (!(whom = getlogin()))
200 whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
203 (void)putc('\n', stdout);
205 (void)setpriority(PRIO_PROCESS, 0, PRIO_MIN);
213 errx(0, "[pid %d]", forkpid);
217 openlog("shutdown", LOG_CONS, LOG_AUTH);
229 if (offset <= NOLOG_TIME) {
236 if (tp->timeleft < offset)
237 (void)sleep((u_int)(offset - tp->timeleft));
239 while (tp->timeleft && offset < tp->timeleft)
242 * Warn now, if going to sleep more than a fifth of
243 * the next wait time.
245 if ((sltime = offset - tp->timeleft)) {
246 if (sltime > (u_int)(tp->timetowait / 5))
252 timewarn(tp->timeleft);
253 if (!logged && tp->timeleft <= NOLOG_TIME) {
257 (void)sleep((u_int)tp->timetowait);
261 die_you_gravy_sucking_pig_dog();
264 static jmp_buf alarmbuf;
266 static const char *restricted_environ[] = {
267 "PATH=" _PATH_STDPATH,
272 timewarn(int timeleft)
275 static char hostname[MAXHOSTNAMELEN + 1];
277 char wcmd[MAXPATHLEN + 4];
280 (void)gethostname(hostname, sizeof(hostname));
282 /* undoc -n option to wall suppresses normal wall banner */
283 (void)snprintf(wcmd, sizeof(wcmd), "%s -n", _PATH_WALL);
284 environ = restricted_environ;
285 if (!(pf = popen(wcmd, "w"))) {
286 syslog(LOG_ERR, "shutdown: can't find %s: %m", _PATH_WALL);
291 "\007*** %sSystem shutdown message from %s@%s ***\007\n",
292 timeleft ? "": "FINAL ", whom, hostname);
294 if (timeleft > 10*60)
295 (void)fprintf(pf, "System going down at %5.5s\n\n",
296 ctime(&shuttime) + 11);
297 else if (timeleft > 59)
298 (void)fprintf(pf, "System going down in %d minute%s\n\n",
299 timeleft / 60, (timeleft > 60) ? "s" : "");
301 (void)fprintf(pf, "System going down in 30 seconds\n\n");
303 (void)fprintf(pf, "System going down IMMEDIATELY\n\n");
306 (void)fwrite(mbuf, sizeof(*mbuf), mbuflen, pf);
309 * play some games, just in case wall doesn't come back
310 * probably unnecessary, given that wall is careful.
312 if (!setjmp(alarmbuf)) {
313 (void)signal(SIGALRM, timeout);
314 (void)alarm((u_int)30);
316 (void)alarm((u_int)0);
317 (void)signal(SIGALRM, SIG_DFL);
322 timeout(int signo __unused)
324 longjmp(alarmbuf, 1);
328 die_you_gravy_sucking_pig_dog()
330 char *empty_environ[] = { NULL };
332 syslog(LOG_NOTICE, "%s by %s: %s",
333 doreboot ? "reboot" : dohalt ? "halt" : dopower ? "power-down" :
334 "shutdown", whom, mbuf);
337 (void)printf("\r\nSystem shutdown time has arrived\007\007\r\n");
339 (void)printf("\rbut you'll have to do it yourself\r\n");
344 (void)printf("reboot");
346 (void)printf("halt");
348 (void)printf("power-down");
350 (void)printf(" no sync");
351 (void)printf("\nkill -HUP 1\n");
354 (void)kill(1, doreboot ? SIGINT : /* reboot */
355 dohalt ? SIGUSR1 : /* halt */
356 dopower ? SIGUSR2 : /* power-down */
357 SIGTERM); /* single-user */
360 execle(_PATH_REBOOT, "reboot", "-l", nosync,
361 (char *)NULL, empty_environ);
362 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
367 execle(_PATH_HALT, "halt", "-l", nosync,
368 (char *)NULL, empty_environ);
369 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
374 execle(_PATH_HALT, "halt", "-l", "-p", nosync,
375 (char *)NULL, empty_environ);
376 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
380 (void)kill(1, SIGTERM); /* to single-user */
386 #define ATOI2(p) (p[0] - '0') * 10 + (p[1] - '0'); p += 2;
389 getoffset(char *timearg)
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));
494 finish(int signo __unused)
497 (void)unlink(_PATH_NOLOGIN);
504 errx(1, "bad time format");
508 usage(const char *cp)
512 (void)fprintf(stderr,
513 "usage: shutdown [-] [-h | -p | -r | -k] [-o [-n]]"
514 " time [warning-message ...]\n");