/* $OpenBSD: shutdown.c,v 1.14 1998/04/25 04:45:38 millert Exp $ */ /* $NetBSD: shutdown.c,v 1.9 1995/03/18 15:01:09 cgd Exp $ */ /* * Copyright (c) 1988, 1990, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char copyright[] = "@(#) Copyright (c) 1988, 1990, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)shutdown.c 8.2 (Berkeley) 2/16/94"; #else static char rcsid[] = "$OpenBSD: shutdown.c,v 1.14 1998/04/25 04:45:38 millert Exp $"; #endif #endif /* not lint */ #include <sys/param.h> #include <sys/time.h> #include <sys/resource.h> #include <sys/syslog.h> #include <ctype.h> #include <fcntl.h> #include <pwd.h> #include <setjmp.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <tzfile.h> #include <unistd.h> #include <errno.h> #include <err.h> #include "pathnames.h" #ifdef DEBUG #undef _PATH_NOLOGIN #define _PATH_NOLOGIN "./nologin" #undef _PATH_FASTBOOT #define _PATH_FASTBOOT "./fastboot" #endif #define H *60*60 #define M *60 #define S *1 #define NOLOG_TIME 5*60 struct interval { int timeleft, timetowait; } tlist[] = { { 10 H, 5 H }, { 5 H, 3 H }, { 2 H, 1 H }, { 1 H, 30 M }, { 30 M, 10 M }, { 20 M, 10 M }, { 10 M, 5 M }, { 5 M, 3 M }, { 2 M, 1 M }, { 1 M, 30 S }, { 30 S, 30 S }, { 0, 0 } }; #undef H #undef M #undef S static time_t offset, shuttime; static int dofast, dohalt, doreboot, dopower, dodump, killflg, mbuflen, nosync; static char *whom, mbuf[BUFSIZ]; void badtime __P((void)); void __attribute ((noreturn)) die_you_gravy_sucking_pig_dog __P((void)); void doitfast __P((void)); void __attribute ((noreturn)) finish __P((int)); void getoffset __P((char *)); void __attribute ((noreturn)) loop __P((void)); void nolog __P((void)); void timeout __P((int)); void timewarn __P((int)); void usage __P((void)); int main(argc, argv) int argc; char *argv[]; { extern int optind; register char *p, *endp; struct passwd *pw; int arglen, ch, len, readstdin; #ifndef DEBUG if (geteuid()) { (void)fprintf(stderr, "shutdown: NOT super-user\n"); exit(1); } #endif readstdin = 0; while ((ch = getopt(argc, argv, "-dfhknpr")) != -1) switch (ch) { case '-': readstdin = 1; break; case 'd': dodump = 1; break; case 'f': dofast = 1; break; case 'h': dohalt = 1; break; case 'k': killflg = 1; break; case 'n': nosync = 1; break; case 'p': dopower = 1; break; case 'r': doreboot = 1; break; case '?': default: usage(); } argc -= optind; argv += optind; if (argc < 1) usage(); if (dofast && nosync) { (void)fprintf(stderr, "shutdown: incompatible switches -f and -n.\n"); usage(); } if (doreboot && dohalt) { (void)fprintf(stderr, "shutdown: incompatible switches -h and -r.\n"); usage(); } if (dopower && !dohalt) { (void)fprintf(stderr, "shutdown: switch -p must be used with -h.\n"); usage(); } getoffset(*argv++); if (*argv) { for (p = mbuf, len = sizeof(mbuf); *argv; ++argv) { arglen = strlen(*argv); if ((len -= arglen) <= 2) break; if (p != mbuf) *p++ = ' '; memcpy(p, *argv, arglen); p += arglen; } *p = '\n'; *++p = '\0'; } if (readstdin) { p = mbuf; endp = mbuf + sizeof(mbuf) - 2; for (;;) { if (!fgets(p, endp - p + 1, stdin)) break; for (; *p && p < endp; ++p); if (p == endp) { *p = '\n'; *++p = '\0'; break; } } } mbuflen = strlen(mbuf); if (offset) (void)printf("Shutdown at %.24s.\n", ctime(&shuttime)); else (void)printf("Shutdown NOW!\n"); if (!(whom = getlogin())) whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???"; #ifdef DEBUG (void)putc('\n', stdout); #else (void)setpriority(PRIO_PROCESS, 0, PRIO_MIN); { int forkpid; forkpid = fork(); if (forkpid == -1) err(1, "fork"); if (forkpid) { (void)printf("shutdown: [pid %d]\n", forkpid); exit(0); } } setsid(); #endif openlog("shutdown", LOG_CONS, LOG_AUTH); loop(); /* NOTREACHED */ } void loop() { struct interval *tp; u_int sltime; int logged; if (offset <= NOLOG_TIME) { logged = 1; nolog(); } else logged = 0; tp = tlist; if (tp->timeleft < offset) (void)sleep((u_int)(offset - tp->timeleft)); else { while (offset < tp->timeleft) ++tp; /* * Warn now, if going to sleep more than a fifth of * the next wait time. */ if ((sltime = offset - tp->timeleft)) { if (sltime > tp->timetowait / 5) timewarn(offset); (void)sleep(sltime); } } for (;; ++tp) { timewarn(tp->timeleft); if (!logged && tp->timeleft <= NOLOG_TIME) { logged = 1; nolog(); } (void)sleep((u_int)tp->timetowait); if (!tp->timeleft) break; } die_you_gravy_sucking_pig_dog(); } static jmp_buf alarmbuf; static char *restricted_environ[] = { "PATH=" _PATH_STDPATH, NULL }; void timewarn(timeleft) int timeleft; { static int first; static char hostname[MAXHOSTNAMELEN]; FILE *pf; char wcmd[MAXPATHLEN + 4]; extern char **environ; if (!first++) (void)gethostname(hostname, sizeof(hostname)); /* undoc -n option to wall suppresses normal wall banner */ (void)snprintf(wcmd, sizeof(wcmd), "%s -n", _PATH_WALL); environ = restricted_environ; if (!(pf = popen(wcmd, "w"))) { syslog(LOG_ERR, "shutdown: can't find %s: %m", _PATH_WALL); return; } (void)fprintf(pf, "\007*** %sSystem shutdown message from %s@%s ***\007\n", timeleft ? "": "FINAL ", whom, hostname); if (timeleft > 10*60) (void)fprintf(pf, "System going down at %5.5s\n\n", ctime(&shuttime) + 11); else if (timeleft > 59) (void)fprintf(pf, "System going down in %d minute%s\n\n", timeleft / 60, (timeleft > 60) ? "s" : ""); else if (timeleft) (void)fprintf(pf, "System going down in 30 seconds\n\n"); else (void)fprintf(pf, "System going down IMMEDIATELY\n\n"); if (mbuflen) (void)fwrite(mbuf, sizeof(*mbuf), mbuflen, pf); /* * play some games, just in case wall doesn't come back * probably unecessary, given that wall is careful. */ if (!setjmp(alarmbuf)) { (void)signal(SIGALRM, timeout); (void)alarm((u_int)30); (void)pclose(pf); (void)alarm((u_int)0); (void)signal(SIGALRM, SIG_DFL); } } void timeout(signo) int signo; { longjmp(alarmbuf, 1); } void die_you_gravy_sucking_pig_dog() { syslog(LOG_NOTICE, "%s by %s: %s", doreboot ? "reboot" : dohalt ? "halt" : "shutdown", whom, mbuf); (void)sleep(2); (void)printf("\r\nSystem shutdown time has arrived\007\007\r\n"); if (killflg) { (void)printf("\rbut you'll have to do it yourself\r\n"); finish(0); } if (dofast) doitfast(); #ifdef DEBUG if (doreboot) (void)printf("reboot"); else if (dohalt) (void)printf("halt"); if (nosync) (void)printf(" no sync"); if (dofast) (void)printf(" no fsck"); if (dodump) (void)printf(" with dump"); (void)printf("\nkill -HUP 1\n"); #else if (doreboot) { execle(_PATH_REBOOT, "reboot", "-l", (nosync ? "-n" : (dodump ? "-d" : NULL)), (dodump ? "-d" : NULL), NULL, NULL); syslog(LOG_ERR, "shutdown: can't exec %s: %m.", _PATH_REBOOT); warn(_PATH_REBOOT); } else if (dohalt) { execle(_PATH_HALT, "halt", "-l", (dopower ? "-p" : (nosync ? "-n" : (dodump ? "-d" : NULL))), (nosync ? "-n" : (dodump ? "-d" : NULL)), (dodump ? "-d" : NULL), NULL, NULL); syslog(LOG_ERR, "shutdown: can't exec %s: %m.", _PATH_HALT); warn(_PATH_HALT); } if (access(_PATH_RCSHUTDOWN, R_OK) != -1) { pid_t pid; switch ((pid = fork())) { case -1: break; case 0: execl(_PATH_BSHELL, "sh", _PATH_RCSHUTDOWN, NULL); exit(1); default: waitpid(pid, NULL, 0); } } (void)kill(1, SIGTERM); /* to single user */ #endif finish(0); } #define ATOI2(p) (p[0] - '0') * 10 + (p[1] - '0'); p += 2; void getoffset(timearg) register char *timearg; { register struct tm *lt; register char *p; time_t now; if (!strcasecmp(timearg, "now")) { /* now */ offset = 0; return; } (void)time(&now); if (*timearg == '+') { /* +minutes */ if (!isdigit(*++timearg)) badtime(); offset = atoi(timearg) * 60; shuttime = now + offset; return; } /* handle hh:mm by getting rid of the colon */ for (p = timearg; *p; ++p) if (!isascii(*p) || !isdigit(*p)) if (*p == ':' && strlen(p) == 3) { p[0] = p[1]; p[1] = p[2]; p[2] = '\0'; } else badtime(); unsetenv("TZ"); /* OUR timezone */ lt = localtime(&now); /* current time val */ switch(strlen(timearg)) { case 10: lt->tm_year = ATOI2(timearg); /* FALLTHROUGH */ case 8: lt->tm_mon = ATOI2(timearg); if (--lt->tm_mon < 0 || lt->tm_mon > 11) badtime(); /* FALLTHROUGH */ case 6: lt->tm_mday = ATOI2(timearg); if (lt->tm_mday < 1 || lt->tm_mday > 31) badtime(); /* FALLTHROUGH */ case 4: lt->tm_hour = ATOI2(timearg); if (lt->tm_hour < 0 || lt->tm_hour > 23) badtime(); lt->tm_min = ATOI2(timearg); if (lt->tm_min < 0 || lt->tm_min > 59) badtime(); lt->tm_sec = 0; if ((shuttime = mktime(lt)) == -1) badtime(); if ((offset = shuttime - now) < 0) { (void)fprintf(stderr, "shutdown: that time is already past.\n"); exit(1); } break; default: badtime(); } } #define FSMSG "fastboot file for fsck\n" void doitfast() { int fastfd; if ((fastfd = open(_PATH_FASTBOOT, O_WRONLY|O_CREAT|O_TRUNC, 0664)) >= 0) { (void)write(fastfd, FSMSG, sizeof(FSMSG) - 1); (void)close(fastfd); } } #define NOMSG "\n\nNO LOGINS: System going down at " void nolog() { int logfd; char *ct; (void)unlink(_PATH_NOLOGIN); /* in case linked to another file */ (void)signal(SIGINT, finish); (void)signal(SIGHUP, finish); (void)signal(SIGQUIT, finish); (void)signal(SIGTERM, finish); if ((logfd = open(_PATH_NOLOGIN, O_WRONLY|O_CREAT|O_TRUNC, 0664)) >= 0) { (void)write(logfd, NOMSG, sizeof(NOMSG) - 1); ct = ctime(&shuttime); (void)write(logfd, ct + 11, 5); (void)write(logfd, "\n\n", 2); (void)write(logfd, mbuf, strlen(mbuf)); (void)close(logfd); } } void finish(signo) int signo; { if (!killflg) (void)unlink(_PATH_NOLOGIN); exit(0); } void badtime() { errx(1, "bad time format."); } void usage() { fprintf(stderr, "usage: shutdown [-fhknpr] shutdowntime [ message ]\n"); exit(1); }