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. 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
29 * @(#) Copyright (c) 1988, 1990, 1993 The Regents of the University of California. All rights reserved.
30 * @(#)shutdown.c 8.4 (Berkeley) 4/28/95
31 * $FreeBSD: src/sbin/shutdown/shutdown.c,v 1.21.2.1 2001/07/30 10:38:08 dd Exp $
34 #include <sys/param.h>
36 #include <sys/resource.h>
37 #include <sys/syslog.h>
50 #include "pathnames.h"
54 #define _PATH_NOLOGIN "./nologin"
60 #define NOLOG_TIME 5*60
61 static struct interval {
62 int timeleft, timetowait;
81 static time_t offset, shuttime;
82 static int dohalt, dopower, doreboot, killflg, mbuflen, oflag;
83 static char mbuf[BUFSIZ];
84 static const char *nosync, *whom;
86 static void badtime(void);
87 static void die_you_gravy_sucking_pig_dog(void);
88 static void finish(int);
89 static void getoffset(char *);
90 static void loop(void);
91 static void nolog(void);
92 static void timeout(int);
93 static void timewarn(int);
94 static void usage(const char *);
96 extern const char **environ;
99 main(int argc, char **argv)
103 int arglen, ch, len, readstdin;
107 errx(1, "NOT super-user");
114 * Test for the special case where the utility is called as
115 * "poweroff", for which it runs 'shutdown -p now'.
117 if ((p = strrchr(argv[0], '/')) == NULL)
121 if (strcmp(p, "poweroff") == 0) {
122 if (getopt(argc, argv, "") != -1)
130 (void)time(&shuttime);
134 while ((ch = getopt(argc, argv, "-hknopr")) != -1)
167 if (killflg + doreboot + dohalt + dopower > 1)
168 usage("incompatible switches -h, -k, -p and -r");
170 if (oflag && !(dohalt || dopower || doreboot))
171 usage("-o requires -h, -p or -r");
173 if (nosync != NULL && !oflag)
174 usage("-n requires -o");
180 for (p = mbuf, len = sizeof(mbuf); *argv; ++argv) {
181 arglen = strlen(*argv);
182 if ((len -= arglen) <= 2)
186 memmove(p, *argv, arglen);
195 endp = mbuf + sizeof(mbuf) - 2;
197 if (!fgets(p, endp - p + 1, stdin))
199 for (; *p && p < endp; ++p);
207 mbuflen = strlen(mbuf);
210 printf("Shutdown at %.24s.\n", ctime(&shuttime));
212 printf("Shutdown NOW!\n");
214 if (!(whom = getlogin()))
215 whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
220 setpriority(PRIO_PROCESS, 0, PRIO_MIN);
228 errx(0, "[pid %d]", forkpid);
232 openlog("shutdown", LOG_CONS, LOG_AUTH);
244 if (offset <= NOLOG_TIME) {
251 if (tp->timeleft < offset)
252 sleep((u_int)(offset - tp->timeleft));
254 while (tp->timeleft && offset < tp->timeleft)
257 * Warn now, if going to sleep more than a fifth of
258 * the next wait time.
260 if ((sltime = offset - tp->timeleft)) {
261 if (sltime > (u_int)(tp->timetowait / 5))
267 timewarn(tp->timeleft);
268 if (!logged && tp->timeleft <= NOLOG_TIME) {
272 sleep((u_int)tp->timetowait);
276 die_you_gravy_sucking_pig_dog();
279 static jmp_buf alarmbuf;
281 static const char *restricted_environ[] = {
282 "PATH=" _PATH_STDPATH,
287 timewarn(int timeleft)
290 static char hostname[MAXHOSTNAMELEN + 1];
292 char wcmd[MAXPATHLEN + 4];
295 gethostname(hostname, sizeof(hostname));
297 /* undoc -n option to wall suppresses normal wall banner */
298 snprintf(wcmd, sizeof(wcmd), "%s -n", _PATH_WALL);
299 environ = restricted_environ;
300 if (!(pf = popen(wcmd, "w"))) {
301 syslog(LOG_ERR, "shutdown: can't find %s: %m", _PATH_WALL);
306 "\007*** %sSystem shutdown message from %s@%s ***\007\n",
307 timeleft ? "": "FINAL ", whom, hostname);
309 if (timeleft > 10*60)
310 fprintf(pf, "System going down at %5.5s\n\n",
311 ctime(&shuttime) + 11);
312 else if (timeleft > 59)
313 fprintf(pf, "System going down in %d minute%s\n\n",
314 timeleft / 60, (timeleft > 60) ? "s" : "");
316 fprintf(pf, "System going down in 30 seconds\n\n");
318 fprintf(pf, "System going down IMMEDIATELY\n\n");
321 fwrite(mbuf, sizeof(*mbuf), mbuflen, pf);
324 * play some games, just in case wall doesn't come back
325 * probably unnecessary, given that wall is careful.
327 if (!setjmp(alarmbuf)) {
328 signal(SIGALRM, timeout);
332 signal(SIGALRM, SIG_DFL);
337 timeout(int signo __unused)
339 longjmp(alarmbuf, 1);
343 die_you_gravy_sucking_pig_dog(void)
345 char *empty_environ[] = { NULL };
347 syslog(LOG_NOTICE, "%s by %s: %s",
348 doreboot ? "reboot" : dohalt ? "halt" : dopower ? "power-down" :
349 "shutdown", whom, mbuf);
352 printf("\r\nSystem shutdown time has arrived\007\007\r\n");
354 printf("\rbut you'll have to do it yourself\r\n");
363 printf("power-down");
366 printf("\nkill -HUP 1\n");
369 kill(1, doreboot ? SIGINT : /* reboot */
370 dohalt ? SIGUSR1 : /* halt */
371 dopower ? SIGUSR2 : /* power-down */
372 SIGTERM); /* single-user */
375 execle(_PATH_REBOOT, "reboot", "-l", nosync,
376 NULL, empty_environ);
377 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
382 execle(_PATH_HALT, "halt", "-l", nosync,
383 NULL, empty_environ);
384 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
389 execle(_PATH_HALT, "halt", "-l", "-p", nosync,
390 NULL, empty_environ);
391 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
395 kill(1, SIGTERM); /* to single-user */
401 #define ATOI2(p) (p[0] - '0') * 10 + (p[1] - '0'); p += 2;
404 getoffset(char *timearg)
413 if (!strcasecmp(timearg, "now")) { /* now */
419 if (*timearg == '+') { /* +minutes */
420 if (!isdigit(*++timearg))
422 if ((offset = atoi(timearg) * 60) < 0)
424 shuttime = now + offset;
428 /* handle hh:mm by getting rid of the colon */
429 for (p = timearg; *p; ++p)
430 if (!isascii(*p) || !isdigit(*p)) {
431 if (*p == ':' && strlen(p) == 3) {
440 unsetenv("TZ"); /* OUR timezone */
441 lt = localtime(&now); /* current time val */
443 switch(strlen(timearg)) {
445 this_year = lt->tm_year;
446 lt->tm_year = ATOI2(timearg);
448 * check if the specified year is in the next century.
449 * allow for one year of user error as many people will
450 * enter n - 1 at the start of year n.
452 if (lt->tm_year < (this_year % 100) - 1)
454 /* adjust for the year 2000 and beyond */
455 lt->tm_year += (this_year - (this_year % 100));
458 lt->tm_mon = ATOI2(timearg);
459 if (--lt->tm_mon < 0 || lt->tm_mon > 11)
463 lt->tm_mday = ATOI2(timearg);
464 if (lt->tm_mday < 1 || lt->tm_mday > 31)
468 lt->tm_hour = ATOI2(timearg);
469 if (lt->tm_hour < 0 || lt->tm_hour > 23)
471 lt->tm_min = ATOI2(timearg);
472 if (lt->tm_min < 0 || lt->tm_min > 59)
475 if ((shuttime = mktime(lt)) == -1)
477 if ((offset = shuttime - now) < 0)
478 errx(1, "that time is already past.");
485 #define NOMSG "\n\nNO LOGINS: System going down at "
492 unlink(_PATH_NOLOGIN); /* in case linked to another file */
493 signal(SIGINT, finish);
494 signal(SIGHUP, finish);
495 signal(SIGQUIT, finish);
496 signal(SIGTERM, finish);
497 if ((logfd = open(_PATH_NOLOGIN, O_WRONLY|O_CREAT|O_TRUNC,
499 write(logfd, NOMSG, sizeof(NOMSG) - 1);
500 ct = ctime(&shuttime);
501 write(logfd, ct + 11, 5);
502 write(logfd, "\n\n", 2);
503 write(logfd, mbuf, strlen(mbuf));
509 finish(int signo __unused)
512 unlink(_PATH_NOLOGIN);
519 errx(1, "bad time format");
523 usage(const char *cp)
528 "usage: shutdown [-] [-h | -p | -r | -k] [-o [-n]]"
529 " time [warning-message ...]\n"