1/*
2 * Copyright (c) 1988, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
20 *
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
31 * SUCH DAMAGE.
32 */
33
| 1/*
2 * Copyright (c) 1988, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
20 *
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
31 * SUCH DAMAGE.
32 */
33
|
47
48#include <sys/param.h>
49#include <sys/time.h>
50#include <sys/resource.h>
51#include <sys/syslog.h>
52
53#include <ctype.h>
54#include <err.h>
55#include <fcntl.h>
56#include <pwd.h>
57#include <setjmp.h>
58#include <signal.h>
59#include <stdio.h>
60#include <stdlib.h>
61#include <string.h>
62#include <unistd.h>
63
64#include "pathnames.h"
65
66#ifdef DEBUG
67#undef _PATH_NOLOGIN
68#define _PATH_NOLOGIN "./nologin"
69#endif
70
71#define H *60*60
72#define M *60
73#define S *1
74#define NOLOG_TIME 5*60
75struct interval {
76 int timeleft, timetowait;
77} tlist[] = {
78 { 10 H, 5 H },
79 { 5 H, 3 H },
80 { 2 H, 1 H },
81 { 1 H, 30 M },
82 { 30 M, 10 M },
83 { 20 M, 10 M },
84 { 10 M, 5 M },
85 { 5 M, 3 M },
86 { 2 M, 1 M },
87 { 1 M, 30 S },
88 { 30 S, 30 S },
89 { 0 , 0 }
90};
91#undef H
92#undef M
93#undef S
94
95static time_t offset, shuttime;
96static int dohalt, dopower, doreboot, killflg, mbuflen, oflag;
97static char mbuf[BUFSIZ];
98static const char *nosync, *whom;
99
100void badtime(void);
101void die_you_gravy_sucking_pig_dog(void);
102void finish(int);
103void getoffset(char *);
104void loop(void);
105void nolog(void);
106void timeout(int);
107void timewarn(int);
108void usage(const char *);
109
110int
111main(argc, argv)
112 int argc;
113 char *argv[];
114{
115 char *p, *endp;
116 struct passwd *pw;
117 int arglen, ch, len, readstdin;
118
119#ifndef DEBUG
120 if (geteuid())
121 errx(1, "NOT super-user");
122#endif
123 nosync = NULL;
124 readstdin = 0;
125 while ((ch = getopt(argc, argv, "-hknopr")) != -1)
126 switch (ch) {
127 case '-':
128 readstdin = 1;
129 break;
130 case 'h':
131 dohalt = 1;
132 break;
133 case 'k':
134 killflg = 1;
135 break;
136 case 'n':
137 nosync = "-n";
138 break;
139 case 'o':
140 oflag = 1;
141 break;
142 case 'p':
143 dopower = 1;
144 break;
145 case 'r':
146 doreboot = 1;
147 break;
148 case '?':
149 default:
150 usage((char *)NULL);
151 }
152 argc -= optind;
153 argv += optind;
154
155 if (argc < 1)
156 usage((char *)NULL);
157
158 if (killflg + doreboot + dohalt + dopower > 1)
159 usage("incompatible switches -h, -k, -p and -r");
160
161 if (oflag && !(dohalt || dopower || doreboot))
162 usage("-o requires -h, -p or -r");
163
164 if (nosync != NULL && !oflag)
165 usage("-n requires -o");
166
167 getoffset(*argv++);
168
169 if (*argv) {
170 for (p = mbuf, len = sizeof(mbuf); *argv; ++argv) {
171 arglen = strlen(*argv);
172 if ((len -= arglen) <= 2)
173 break;
174 if (p != mbuf)
175 *p++ = ' ';
176 memmove(p, *argv, arglen);
177 p += arglen;
178 }
179 *p = '\n';
180 *++p = '\0';
181 }
182
183 if (readstdin) {
184 p = mbuf;
185 endp = mbuf + sizeof(mbuf) - 2;
186 for (;;) {
187 if (!fgets(p, endp - p + 1, stdin))
188 break;
189 for (; *p && p < endp; ++p);
190 if (p == endp) {
191 *p = '\n';
192 *++p = '\0';
193 break;
194 }
195 }
196 }
197 mbuflen = strlen(mbuf);
198
199 if (offset)
200 (void)printf("Shutdown at %.24s.\n", ctime(&shuttime));
201 else
202 (void)printf("Shutdown NOW!\n");
203
204 if (!(whom = getlogin()))
205 whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
206
207#ifdef DEBUG
208 (void)putc('\n', stdout);
209#else
210 (void)setpriority(PRIO_PROCESS, 0, PRIO_MIN);
211 {
212 int forkpid;
213
214 forkpid = fork();
215 if (forkpid == -1)
216 err(1, "fork");
217 if (forkpid)
218 errx(0, "[pid %d]", forkpid);
219 }
220 setsid();
221#endif
222 openlog("shutdown", LOG_CONS, LOG_AUTH);
223 loop();
224 return(0);
225}
226
227void
228loop()
229{
230 struct interval *tp;
231 u_int sltime;
232 int logged;
233
234 if (offset <= NOLOG_TIME) {
235 logged = 1;
236 nolog();
237 }
238 else
239 logged = 0;
240 tp = tlist;
241 if (tp->timeleft < offset)
242 (void)sleep((u_int)(offset - tp->timeleft));
243 else {
244 while (tp->timeleft && offset < tp->timeleft)
245 ++tp;
246 /*
247 * Warn now, if going to sleep more than a fifth of
248 * the next wait time.
249 */
250 if ((sltime = offset - tp->timeleft)) {
251 if (sltime > (u_int)(tp->timetowait / 5))
252 timewarn(offset);
253 (void)sleep(sltime);
254 }
255 }
256 for (;; ++tp) {
257 timewarn(tp->timeleft);
258 if (!logged && tp->timeleft <= NOLOG_TIME) {
259 logged = 1;
260 nolog();
261 }
262 (void)sleep((u_int)tp->timetowait);
263 if (!tp->timeleft)
264 break;
265 }
266 die_you_gravy_sucking_pig_dog();
267}
268
269static jmp_buf alarmbuf;
270
271static const char *restricted_environ[] = {
272 "PATH=" _PATH_STDPATH,
273 NULL
274};
275
276void
277timewarn(timeleft)
278 int timeleft;
279{
280 static int first;
281 static char hostname[MAXHOSTNAMELEN + 1];
282 FILE *pf;
283 char wcmd[MAXPATHLEN + 4];
284 extern const char **environ;
285
286 if (!first++)
287 (void)gethostname(hostname, sizeof(hostname));
288
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);
294 return;
295 }
296
297 (void)fprintf(pf,
298 "\007*** %sSystem shutdown message from %s@%s ***\007\n",
299 timeleft ? "": "FINAL ", whom, hostname);
300
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" : "");
307 else if (timeleft)
308 (void)fprintf(pf, "System going down in 30 seconds\n\n");
309 else
310 (void)fprintf(pf, "System going down IMMEDIATELY\n\n");
311
312 if (mbuflen)
313 (void)fwrite(mbuf, sizeof(*mbuf), mbuflen, pf);
314
315 /*
316 * play some games, just in case wall doesn't come back
317 * probably unnecessary, given that wall is careful.
318 */
319 if (!setjmp(alarmbuf)) {
320 (void)signal(SIGALRM, timeout);
321 (void)alarm((u_int)30);
322 (void)pclose(pf);
323 (void)alarm((u_int)0);
324 (void)signal(SIGALRM, SIG_DFL);
325 }
326}
327
328void
329timeout(signo)
330 int signo __unused;
331{
332 longjmp(alarmbuf, 1);
333}
334
335void
336die_you_gravy_sucking_pig_dog()
337{
338 char *empty_environ[] = { NULL };
339
340 syslog(LOG_NOTICE, "%s by %s: %s",
341 doreboot ? "reboot" : dohalt ? "halt" : dopower ? "power-down" :
342 "shutdown", whom, mbuf);
343 (void)sleep(2);
344
345 (void)printf("\r\nSystem shutdown time has arrived\007\007\r\n");
346 if (killflg) {
347 (void)printf("\rbut you'll have to do it yourself\r\n");
348 exit(0);
349 }
350#ifdef DEBUG
351 if (doreboot)
352 (void)printf("reboot");
353 else if (dohalt)
354 (void)printf("halt");
355 else if (dopower)
356 (void)printf("power-down");
357 if (nosync != NULL)
358 (void)printf(" no sync");
359 (void)printf("\nkill -HUP 1\n");
360#else
361 if (!oflag) {
362 (void)kill(1, doreboot ? SIGINT : /* reboot */
363 dohalt ? SIGUSR1 : /* halt */
364 dopower ? SIGUSR2 : /* power-down */
365 SIGTERM); /* single-user */
366 } else {
367 if (doreboot) {
368 execle(_PATH_REBOOT, "reboot", "-l", nosync,
369 (char *)NULL, empty_environ);
370 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
371 _PATH_REBOOT);
372 warn(_PATH_REBOOT);
373 }
374 else if (dohalt) {
375 execle(_PATH_HALT, "halt", "-l", nosync,
376 (char *)NULL, empty_environ);
377 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
378 _PATH_HALT);
379 warn(_PATH_HALT);
380 }
381 else if (dopower) {
382 execle(_PATH_HALT, "halt", "-l", "-p", nosync,
383 (char *)NULL, empty_environ);
384 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
385 _PATH_HALT);
386 warn(_PATH_HALT);
387 }
388 (void)kill(1, SIGTERM); /* to single-user */
389 }
390#endif
391 finish(0);
392}
393
394#define ATOI2(p) (p[0] - '0') * 10 + (p[1] - '0'); p += 2;
395
396void
397getoffset(timearg)
398 char *timearg;
399{
400 struct tm *lt;
401 char *p;
402 time_t now;
403 int this_year;
404
405 (void)time(&now);
406
407 if (!strcasecmp(timearg, "now")) { /* now */
408 offset = 0;
409 shuttime = now;
410 return;
411 }
412
413 if (*timearg == '+') { /* +minutes */
414 if (!isdigit(*++timearg))
415 badtime();
416 if ((offset = atoi(timearg) * 60) < 0)
417 badtime();
418 shuttime = now + offset;
419 return;
420 }
421
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) {
426 p[0] = p[1];
427 p[1] = p[2];
428 p[2] = '\0';
429 }
430 else
431 badtime();
432 }
433
434 unsetenv("TZ"); /* OUR timezone */
435 lt = localtime(&now); /* current time val */
436
437 switch(strlen(timearg)) {
438 case 10:
439 this_year = lt->tm_year;
440 lt->tm_year = ATOI2(timearg);
441 /*
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.
445 */
446 if (lt->tm_year < (this_year % 100) - 1)
447 lt->tm_year += 100;
448 /* adjust for the year 2000 and beyond */
449 lt->tm_year += (this_year - (this_year % 100));
450 /* FALLTHROUGH */
451 case 8:
452 lt->tm_mon = ATOI2(timearg);
453 if (--lt->tm_mon < 0 || lt->tm_mon > 11)
454 badtime();
455 /* FALLTHROUGH */
456 case 6:
457 lt->tm_mday = ATOI2(timearg);
458 if (lt->tm_mday < 1 || lt->tm_mday > 31)
459 badtime();
460 /* FALLTHROUGH */
461 case 4:
462 lt->tm_hour = ATOI2(timearg);
463 if (lt->tm_hour < 0 || lt->tm_hour > 23)
464 badtime();
465 lt->tm_min = ATOI2(timearg);
466 if (lt->tm_min < 0 || lt->tm_min > 59)
467 badtime();
468 lt->tm_sec = 0;
469 if ((shuttime = mktime(lt)) == -1)
470 badtime();
471 if ((offset = shuttime - now) < 0)
472 errx(1, "that time is already past.");
473 break;
474 default:
475 badtime();
476 }
477}
478
479#define NOMSG "\n\nNO LOGINS: System going down at "
480void
481nolog()
482{
483 int logfd;
484 char *ct;
485
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,
492 0664)) >= 0) {
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));
498 (void)close(logfd);
499 }
500}
501
502void
503finish(signo)
504 int signo __unused;
505{
506 if (!killflg)
507 (void)unlink(_PATH_NOLOGIN);
508 exit(0);
509}
510
511void
512badtime()
513{
514 errx(1, "bad time format");
515}
516
517void
518usage(cp)
519 const char *cp;
520{
521 if (cp != NULL)
522 warnx("%s", cp);
523 (void)fprintf(stderr,
524 "usage: shutdown [-] [-h | -p | -r | -k] [-o [-n]]"
525 " time [warning-message ...]\n");
526 exit(1);
527}
| 47
48#include <sys/param.h>
49#include <sys/time.h>
50#include <sys/resource.h>
51#include <sys/syslog.h>
52
53#include <ctype.h>
54#include <err.h>
55#include <fcntl.h>
56#include <pwd.h>
57#include <setjmp.h>
58#include <signal.h>
59#include <stdio.h>
60#include <stdlib.h>
61#include <string.h>
62#include <unistd.h>
63
64#include "pathnames.h"
65
66#ifdef DEBUG
67#undef _PATH_NOLOGIN
68#define _PATH_NOLOGIN "./nologin"
69#endif
70
71#define H *60*60
72#define M *60
73#define S *1
74#define NOLOG_TIME 5*60
75struct interval {
76 int timeleft, timetowait;
77} tlist[] = {
78 { 10 H, 5 H },
79 { 5 H, 3 H },
80 { 2 H, 1 H },
81 { 1 H, 30 M },
82 { 30 M, 10 M },
83 { 20 M, 10 M },
84 { 10 M, 5 M },
85 { 5 M, 3 M },
86 { 2 M, 1 M },
87 { 1 M, 30 S },
88 { 30 S, 30 S },
89 { 0 , 0 }
90};
91#undef H
92#undef M
93#undef S
94
95static time_t offset, shuttime;
96static int dohalt, dopower, doreboot, killflg, mbuflen, oflag;
97static char mbuf[BUFSIZ];
98static const char *nosync, *whom;
99
100void badtime(void);
101void die_you_gravy_sucking_pig_dog(void);
102void finish(int);
103void getoffset(char *);
104void loop(void);
105void nolog(void);
106void timeout(int);
107void timewarn(int);
108void usage(const char *);
109
110int
111main(argc, argv)
112 int argc;
113 char *argv[];
114{
115 char *p, *endp;
116 struct passwd *pw;
117 int arglen, ch, len, readstdin;
118
119#ifndef DEBUG
120 if (geteuid())
121 errx(1, "NOT super-user");
122#endif
123 nosync = NULL;
124 readstdin = 0;
125 while ((ch = getopt(argc, argv, "-hknopr")) != -1)
126 switch (ch) {
127 case '-':
128 readstdin = 1;
129 break;
130 case 'h':
131 dohalt = 1;
132 break;
133 case 'k':
134 killflg = 1;
135 break;
136 case 'n':
137 nosync = "-n";
138 break;
139 case 'o':
140 oflag = 1;
141 break;
142 case 'p':
143 dopower = 1;
144 break;
145 case 'r':
146 doreboot = 1;
147 break;
148 case '?':
149 default:
150 usage((char *)NULL);
151 }
152 argc -= optind;
153 argv += optind;
154
155 if (argc < 1)
156 usage((char *)NULL);
157
158 if (killflg + doreboot + dohalt + dopower > 1)
159 usage("incompatible switches -h, -k, -p and -r");
160
161 if (oflag && !(dohalt || dopower || doreboot))
162 usage("-o requires -h, -p or -r");
163
164 if (nosync != NULL && !oflag)
165 usage("-n requires -o");
166
167 getoffset(*argv++);
168
169 if (*argv) {
170 for (p = mbuf, len = sizeof(mbuf); *argv; ++argv) {
171 arglen = strlen(*argv);
172 if ((len -= arglen) <= 2)
173 break;
174 if (p != mbuf)
175 *p++ = ' ';
176 memmove(p, *argv, arglen);
177 p += arglen;
178 }
179 *p = '\n';
180 *++p = '\0';
181 }
182
183 if (readstdin) {
184 p = mbuf;
185 endp = mbuf + sizeof(mbuf) - 2;
186 for (;;) {
187 if (!fgets(p, endp - p + 1, stdin))
188 break;
189 for (; *p && p < endp; ++p);
190 if (p == endp) {
191 *p = '\n';
192 *++p = '\0';
193 break;
194 }
195 }
196 }
197 mbuflen = strlen(mbuf);
198
199 if (offset)
200 (void)printf("Shutdown at %.24s.\n", ctime(&shuttime));
201 else
202 (void)printf("Shutdown NOW!\n");
203
204 if (!(whom = getlogin()))
205 whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
206
207#ifdef DEBUG
208 (void)putc('\n', stdout);
209#else
210 (void)setpriority(PRIO_PROCESS, 0, PRIO_MIN);
211 {
212 int forkpid;
213
214 forkpid = fork();
215 if (forkpid == -1)
216 err(1, "fork");
217 if (forkpid)
218 errx(0, "[pid %d]", forkpid);
219 }
220 setsid();
221#endif
222 openlog("shutdown", LOG_CONS, LOG_AUTH);
223 loop();
224 return(0);
225}
226
227void
228loop()
229{
230 struct interval *tp;
231 u_int sltime;
232 int logged;
233
234 if (offset <= NOLOG_TIME) {
235 logged = 1;
236 nolog();
237 }
238 else
239 logged = 0;
240 tp = tlist;
241 if (tp->timeleft < offset)
242 (void)sleep((u_int)(offset - tp->timeleft));
243 else {
244 while (tp->timeleft && offset < tp->timeleft)
245 ++tp;
246 /*
247 * Warn now, if going to sleep more than a fifth of
248 * the next wait time.
249 */
250 if ((sltime = offset - tp->timeleft)) {
251 if (sltime > (u_int)(tp->timetowait / 5))
252 timewarn(offset);
253 (void)sleep(sltime);
254 }
255 }
256 for (;; ++tp) {
257 timewarn(tp->timeleft);
258 if (!logged && tp->timeleft <= NOLOG_TIME) {
259 logged = 1;
260 nolog();
261 }
262 (void)sleep((u_int)tp->timetowait);
263 if (!tp->timeleft)
264 break;
265 }
266 die_you_gravy_sucking_pig_dog();
267}
268
269static jmp_buf alarmbuf;
270
271static const char *restricted_environ[] = {
272 "PATH=" _PATH_STDPATH,
273 NULL
274};
275
276void
277timewarn(timeleft)
278 int timeleft;
279{
280 static int first;
281 static char hostname[MAXHOSTNAMELEN + 1];
282 FILE *pf;
283 char wcmd[MAXPATHLEN + 4];
284 extern const char **environ;
285
286 if (!first++)
287 (void)gethostname(hostname, sizeof(hostname));
288
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);
294 return;
295 }
296
297 (void)fprintf(pf,
298 "\007*** %sSystem shutdown message from %s@%s ***\007\n",
299 timeleft ? "": "FINAL ", whom, hostname);
300
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" : "");
307 else if (timeleft)
308 (void)fprintf(pf, "System going down in 30 seconds\n\n");
309 else
310 (void)fprintf(pf, "System going down IMMEDIATELY\n\n");
311
312 if (mbuflen)
313 (void)fwrite(mbuf, sizeof(*mbuf), mbuflen, pf);
314
315 /*
316 * play some games, just in case wall doesn't come back
317 * probably unnecessary, given that wall is careful.
318 */
319 if (!setjmp(alarmbuf)) {
320 (void)signal(SIGALRM, timeout);
321 (void)alarm((u_int)30);
322 (void)pclose(pf);
323 (void)alarm((u_int)0);
324 (void)signal(SIGALRM, SIG_DFL);
325 }
326}
327
328void
329timeout(signo)
330 int signo __unused;
331{
332 longjmp(alarmbuf, 1);
333}
334
335void
336die_you_gravy_sucking_pig_dog()
337{
338 char *empty_environ[] = { NULL };
339
340 syslog(LOG_NOTICE, "%s by %s: %s",
341 doreboot ? "reboot" : dohalt ? "halt" : dopower ? "power-down" :
342 "shutdown", whom, mbuf);
343 (void)sleep(2);
344
345 (void)printf("\r\nSystem shutdown time has arrived\007\007\r\n");
346 if (killflg) {
347 (void)printf("\rbut you'll have to do it yourself\r\n");
348 exit(0);
349 }
350#ifdef DEBUG
351 if (doreboot)
352 (void)printf("reboot");
353 else if (dohalt)
354 (void)printf("halt");
355 else if (dopower)
356 (void)printf("power-down");
357 if (nosync != NULL)
358 (void)printf(" no sync");
359 (void)printf("\nkill -HUP 1\n");
360#else
361 if (!oflag) {
362 (void)kill(1, doreboot ? SIGINT : /* reboot */
363 dohalt ? SIGUSR1 : /* halt */
364 dopower ? SIGUSR2 : /* power-down */
365 SIGTERM); /* single-user */
366 } else {
367 if (doreboot) {
368 execle(_PATH_REBOOT, "reboot", "-l", nosync,
369 (char *)NULL, empty_environ);
370 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
371 _PATH_REBOOT);
372 warn(_PATH_REBOOT);
373 }
374 else if (dohalt) {
375 execle(_PATH_HALT, "halt", "-l", nosync,
376 (char *)NULL, empty_environ);
377 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
378 _PATH_HALT);
379 warn(_PATH_HALT);
380 }
381 else if (dopower) {
382 execle(_PATH_HALT, "halt", "-l", "-p", nosync,
383 (char *)NULL, empty_environ);
384 syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
385 _PATH_HALT);
386 warn(_PATH_HALT);
387 }
388 (void)kill(1, SIGTERM); /* to single-user */
389 }
390#endif
391 finish(0);
392}
393
394#define ATOI2(p) (p[0] - '0') * 10 + (p[1] - '0'); p += 2;
395
396void
397getoffset(timearg)
398 char *timearg;
399{
400 struct tm *lt;
401 char *p;
402 time_t now;
403 int this_year;
404
405 (void)time(&now);
406
407 if (!strcasecmp(timearg, "now")) { /* now */
408 offset = 0;
409 shuttime = now;
410 return;
411 }
412
413 if (*timearg == '+') { /* +minutes */
414 if (!isdigit(*++timearg))
415 badtime();
416 if ((offset = atoi(timearg) * 60) < 0)
417 badtime();
418 shuttime = now + offset;
419 return;
420 }
421
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) {
426 p[0] = p[1];
427 p[1] = p[2];
428 p[2] = '\0';
429 }
430 else
431 badtime();
432 }
433
434 unsetenv("TZ"); /* OUR timezone */
435 lt = localtime(&now); /* current time val */
436
437 switch(strlen(timearg)) {
438 case 10:
439 this_year = lt->tm_year;
440 lt->tm_year = ATOI2(timearg);
441 /*
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.
445 */
446 if (lt->tm_year < (this_year % 100) - 1)
447 lt->tm_year += 100;
448 /* adjust for the year 2000 and beyond */
449 lt->tm_year += (this_year - (this_year % 100));
450 /* FALLTHROUGH */
451 case 8:
452 lt->tm_mon = ATOI2(timearg);
453 if (--lt->tm_mon < 0 || lt->tm_mon > 11)
454 badtime();
455 /* FALLTHROUGH */
456 case 6:
457 lt->tm_mday = ATOI2(timearg);
458 if (lt->tm_mday < 1 || lt->tm_mday > 31)
459 badtime();
460 /* FALLTHROUGH */
461 case 4:
462 lt->tm_hour = ATOI2(timearg);
463 if (lt->tm_hour < 0 || lt->tm_hour > 23)
464 badtime();
465 lt->tm_min = ATOI2(timearg);
466 if (lt->tm_min < 0 || lt->tm_min > 59)
467 badtime();
468 lt->tm_sec = 0;
469 if ((shuttime = mktime(lt)) == -1)
470 badtime();
471 if ((offset = shuttime - now) < 0)
472 errx(1, "that time is already past.");
473 break;
474 default:
475 badtime();
476 }
477}
478
479#define NOMSG "\n\nNO LOGINS: System going down at "
480void
481nolog()
482{
483 int logfd;
484 char *ct;
485
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,
492 0664)) >= 0) {
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));
498 (void)close(logfd);
499 }
500}
501
502void
503finish(signo)
504 int signo __unused;
505{
506 if (!killflg)
507 (void)unlink(_PATH_NOLOGIN);
508 exit(0);
509}
510
511void
512badtime()
513{
514 errx(1, "bad time format");
515}
516
517void
518usage(cp)
519 const char *cp;
520{
521 if (cp != NULL)
522 warnx("%s", cp);
523 (void)fprintf(stderr,
524 "usage: shutdown [-] [-h | -p | -r | -k] [-o [-n]]"
525 " time [warning-message ...]\n");
526 exit(1);
527}
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