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
35 static const char copyright[] =
36 "@(#) Copyright (c) 1988, 1990, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
42 static char sccsid[] = "@(#)shutdown.c 8.4 (Berkeley) 4/28/95";
44 static const char rcsid[] =
48 #include <sys/param.h>
50 #include <sys/resource.h>
51 #include <sys/syslog.h>
64 #include "pathnames.h"
68 #define _PATH_NOLOGIN "./nologin"
74 #define NOLOG_TIME 5*60
76 int timeleft, timetowait;
95 static time_t offset, shuttime;
96 static int dohalt, dopower, doreboot, killflg, mbuflen, oflag;
97 static char mbuf[BUFSIZ];
98 static const char *nosync, *whom;
101 void die_you_gravy_sucking_pig_dog(void);
103 void getoffset(char *);
108 void usage(const char *);
117 int arglen, ch, len, readstdin;
121 errx(1, "NOT super-user");
125 while ((ch = getopt(argc, argv, "-hknopr")) != -1)
158 if (killflg + doreboot + dohalt + dopower > 1)
159 usage("incompatible switches -h, -k, -p and -r");
161 if (oflag && !(dohalt || dopower || doreboot))
162 usage("-o requires -h, -p or -r");
164 if (nosync != NULL && !oflag)
165 usage("-n requires -o");
170 for (p = mbuf, len = sizeof(mbuf); *argv; ++argv) {
171 arglen = strlen(*argv);
172 if ((len -= arglen) <= 2)
176 memmove(p, *argv, arglen);
185 endp = mbuf + sizeof(mbuf) - 2;
187 if (!fgets(p, endp - p + 1, stdin))
189 for (; *p && p < endp; ++p);
197 mbuflen = strlen(mbuf);
200 (void)printf("Shutdown at %.24s.\n", ctime(&shuttime));
202 (void)printf("Shutdown NOW!\n");
204 if (!(whom = getlogin()))
205 whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
208 (void)putc('\n', stdout);
210 (void)setpriority(PRIO_PROCESS, 0, PRIO_MIN);
218 errx(0, "[pid %d]", forkpid);
222 openlog("shutdown", LOG_CONS, LOG_AUTH);
234 if (offset <= NOLOG_TIME) {
241 if (tp->timeleft < offset)
242 (void)sleep((u_int)(offset - tp->timeleft));
244 while (tp->timeleft && offset < tp->timeleft)
247 * Warn now, if going to sleep more than a fifth of
248 * the next wait time.
250 if ((sltime = offset - tp->timeleft)) {
251 if (sltime > (u_int)(tp->timetowait / 5))
257 timewarn(tp->timeleft);
258 if (!logged && tp->timeleft <= NOLOG_TIME) {
262 (void)sleep((u_int)tp->timetowait);
266 die_you_gravy_sucking_pig_dog();
269 static jmp_buf alarmbuf;
271 static const char *restricted_environ[] = {
272 "PATH=" _PATH_STDPATH,
281 static char hostname[MAXHOSTNAMELEN + 1];
283 char wcmd[MAXPATHLEN + 4];
284 extern const char **environ;
287 (void)gethostname(hostname, sizeof(hostname));
289 /* undoc -n option to wall suppresses normal wall banner */
290 (void)snprintf(wcmd, sizeof(wcmd), "%s -n", _PATH_WALL);
291 environ = restricted_environ;
292 if (!(pf = popen(wcmd, "w"))) {
293 syslog(LOG_ERR, "shutdown: can't find %s: %m", _PATH_WALL);
298 "\007*** %sSystem shutdown message from %s@%s ***\007\n",
299 timeleft ? "": "FINAL ", whom, hostname);
301 if (timeleft > 10*60)
302 (void)fprintf(pf, "System going down at %5.5s\n\n",
303 ctime(&shuttime) + 11);
304 else if (timeleft > 59)
305 (void)fprintf(pf, "System going down in %d minute%s\n\n",
306 timeleft / 60, (timeleft > 60) ? "s" : "");
308 (void)fprintf(pf, "System going down in 30 seconds\n\n");
310 (void)fprintf(pf, "System going down IMMEDIATELY\n\n");
313 (void)fwrite(mbuf, sizeof(*mbuf), mbuflen, pf);
316 * play some games, just in case wall doesn't come back
317 * probably unnecessary, given that wall is careful.
319 if (!setjmp(alarmbuf)) {
320 (void)signal(SIGALRM, timeout);
321 (void)alarm((u_int)30);
323 (void)alarm((u_int)0);
324 (void)signal(SIGALRM, SIG_DFL);
332 longjmp(alarmbuf, 1);
336 die_you_gravy_sucking_pig_dog()
338 char *empty_environ[] = { NULL };
340 syslog(LOG_NOTICE, "%s by %s: %s",
341 doreboot ? "reboot" : dohalt ? "halt" : dopower ? "power-down" :
342 "shutdown", whom, mbuf);
345 (void)printf("\r\nSystem shutdown time has arrived\007\007\r\n");
347 (void)printf("\rbut you'll have to do it yourself\r\n");
352 (void)printf("reboot");
354 (void)printf("halt");
356 (void)printf("power-down");
358 (void)printf(" no sync");
359 (void)printf("\nkill -HUP 1\n");
362 (void)kill(1, doreboot ? SIGINT : /* reboot */
363 dohalt ? SIGUSR1 : /* halt */
364 dopower ? SIGUSR2 : /* power-down */
365 SIGTERM); /* single-user */
368 execle(_PATH_REBOOT, "reboot", "-l", nosync,
369 (char *)NULL, empty_environ);
370 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
375 execle(_PATH_HALT, "halt", "-l", nosync,
376 (char *)NULL, empty_environ);
377 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
382 execle(_PATH_HALT, "halt", "-l", "-p", nosync,
383 (char *)NULL, empty_environ);
384 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
388 (void)kill(1, SIGTERM); /* to single-user */
394 #define ATOI2(p) (p[0] - '0') * 10 + (p[1] - '0'); p += 2;
407 if (!strcasecmp(timearg, "now")) { /* now */
413 if (*timearg == '+') { /* +minutes */
414 if (!isdigit(*++timearg))
416 if ((offset = atoi(timearg) * 60) < 0)
418 shuttime = now + offset;
422 /* handle hh:mm by getting rid of the colon */
423 for (p = timearg; *p; ++p)
424 if (!isascii(*p) || !isdigit(*p)) {
425 if (*p == ':' && strlen(p) == 3) {
434 unsetenv("TZ"); /* OUR timezone */
435 lt = localtime(&now); /* current time val */
437 switch(strlen(timearg)) {
439 this_year = lt->tm_year;
440 lt->tm_year = ATOI2(timearg);
442 * check if the specified year is in the next century.
443 * allow for one year of user error as many people will
444 * enter n - 1 at the start of year n.
446 if (lt->tm_year < (this_year % 100) - 1)
448 /* adjust for the year 2000 and beyond */
449 lt->tm_year += (this_year - (this_year % 100));
452 lt->tm_mon = ATOI2(timearg);
453 if (--lt->tm_mon < 0 || lt->tm_mon > 11)
457 lt->tm_mday = ATOI2(timearg);
458 if (lt->tm_mday < 1 || lt->tm_mday > 31)
462 lt->tm_hour = ATOI2(timearg);
463 if (lt->tm_hour < 0 || lt->tm_hour > 23)
465 lt->tm_min = ATOI2(timearg);
466 if (lt->tm_min < 0 || lt->tm_min > 59)
469 if ((shuttime = mktime(lt)) == -1)
471 if ((offset = shuttime - now) < 0)
472 errx(1, "that time is already past.");
479 #define NOMSG "\n\nNO LOGINS: System going down at "
486 (void)unlink(_PATH_NOLOGIN); /* in case linked to another file */
487 (void)signal(SIGINT, finish);
488 (void)signal(SIGHUP, finish);
489 (void)signal(SIGQUIT, finish);
490 (void)signal(SIGTERM, finish);
491 if ((logfd = open(_PATH_NOLOGIN, O_WRONLY|O_CREAT|O_TRUNC,
493 (void)write(logfd, NOMSG, sizeof(NOMSG) - 1);
494 ct = ctime(&shuttime);
495 (void)write(logfd, ct + 11, 5);
496 (void)write(logfd, "\n\n", 2);
497 (void)write(logfd, mbuf, strlen(mbuf));
507 (void)unlink(_PATH_NOLOGIN);
514 errx(1, "bad time format");
523 (void)fprintf(stderr,
524 "usage: shutdown [-] [-h | -p | -r | -k] [-o [-n]]"
525 " time [warning-message ...]\n");