shutdown.tproj/shutdown.c

   1 /*
   2  * Copyright (c) 1988, 1990, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  * Portions copyright (c) 2007 Apple Inc.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. Neither the name of the University nor the names of its contributors
  15  *    may be used to endorse or promote products derived from this software
  16  *    without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30
  31 #if 0
  32 #ifndef lint
  33 static const char copyright[] =
  34 "@(#) Copyright (c) 1988, 1990, 1993\n\
  35         The Regents of the University of California.  All rights reserved.\n";
  36 #endif /* not lint */
  37
  38 #ifndef lint
  39 static char sccsid[] = "@(#)shutdown.c  8.4 (Berkeley) 4/28/95";
  40 #endif /* not lint */
  41 #endif
  42 #include <sys/cdefs.h>
  43 #ifndef __APPLE__
  44 __FBSDID("$FreeBSD: src/sbin/shutdown/shutdown.c,v 1.28 2005/01/25 08:40:51 delphij Exp $");
  45 #endif
  46
  47 #include <sys/param.h>
  48 #include <sys/time.h>
  49 #include <sys/resource.h>
  50 #include <sys/syslog.h>
  51
  52 #include <ctype.h>
  53 #include <err.h>
  54 #include <fcntl.h>
  55 #include <paths.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 #ifdef __APPLE__
  65 #include <errno.h>
  66 #include <util.h>
  67 #include <bsm/libbsm.h>
  68 #include <bsm/audit_uevents.h>
  69 #include <vproc.h>
  70 #include <vproc_priv.h>
  71
  72 #include "kextmanager.h"
  73 #include <IOKit/kext/kextmanager_types.h>
  74 #include <IOKit/pwr_mgt/IOPMLib.h>
  75 #include <mach/mach_port.h>             // allocate
  76 #include <mach/mach.h>                  // task_self, etc
  77 #include <servers/bootstrap.h>  // bootstrap
  78 #include <bootstrap_priv.h>
  79 #include <reboot2.h>
  80 #include <utmpx.h>
  81
  82 #include "pathnames.h"
  83 #endif /* __APPLE__ */
  84
  85 #ifdef DEBUG
  86 #undef _PATH_NOLOGIN
  87 #define _PATH_NOLOGIN   "./nologin"
  88 #endif
  89
  90 #define H               *60*60
  91 #define M               *60
  92 #define S               *1
  93 #define NOLOG_TIME      5*60
  94 struct interval {
  95         int timeleft, timetowait;
  96 } tlist[] = {
  97         { 10 H,  5 H },
  98         {  5 H,  3 H },
  99         {  2 H,  1 H },
 100         {  1 H, 30 M },
 101         { 30 M, 10 M },
 102         { 20 M, 10 M },
 103         { 10 M,  5 M },
 104         {  5 M,  3 M },
 105         {  2 M,  1 M },
 106         {  1 M, 30 S },
 107         { 30 S, 30 S },
 108         {  0  ,  0   }
 109 };
 110 #undef H
 111 #undef M
 112 #undef S
 113
 114 static time_t offset, shuttime;
 115 #ifdef __APPLE__
 116 static int dohalt, doreboot, doups, killflg, oflag;
 117 static size_t mbuflen;
 118 #else
 119 static int dohalt, dopower, doreboot, killflg, mbuflen, oflag;
 120 #endif
 121 static char mbuf[BUFSIZ];
 122 static const char *nosync, *whom;
 123 #ifdef __APPLE__
 124 static int dosleep;
 125 #endif
 126
 127 void badtime(void);
 128 #ifdef __APPLE__
 129 void log_and_exec_reboot_or_halt(void);
 130 #else
 131 void die_you_gravy_sucking_pig_dog(void);
 132 #endif
 133 void finish(int);
 134 void getoffset(char *);
 135 void loop(void);
 136 void nolog(void);
 137 void timeout(int);
 138 void timewarn(time_t);
 139 void usage(const char *);
 140 #ifdef __APPLE__
 141 int audit_shutdown(int);
 142 int reserve_reboot(void);
 143 #endif
 144
 145 extern const char **environ;
 146
 147 int
 148 main(int argc, char **argv)
 149 {
 150         char *p, *endp;
 151         struct passwd *pw;
 152         size_t arglen;
 153         int ch, len, readstdin;
 154
 155 #ifndef DEBUG
 156         if (geteuid())
 157                 errx(1, "NOT super-user");
 158 #endif
 159         nosync = NULL;
 160         readstdin = 0;
 161 #ifndef __APPLE__
 162         while ((ch = getopt(argc, argv, "-hknopr")) != -1)
 163 #else
 164         while ((ch = getopt(argc, argv, "-hknorsu")) != -1)
 165 #endif
 166                 switch (ch) {
 167                 case '-':
 168                         readstdin = 1;
 169                         break;
 170                 case 'h':
 171                         dohalt = 1;
 172                         break;
 173                 case 'k':
 174                         killflg = 1;
 175                         break;
 176                 case 'n':
 177                         nosync = "-n";
 178                         break;
 179                 case 'o':
 180                         oflag = 1;
 181                         break;
 182 #ifndef __APPLE__
 183                 case 'p':
 184                         dopower = 1;
 185                         break;
 186 #endif
 187         case 'u':
 188             doups = 1;
 189             break;
 190                 case 'r':
 191                         doreboot = 1;
 192                         break;
 193 #ifdef __APPLE__
 194                 case 's':
 195                         dosleep = 1;
 196                         break;
 197 #endif
 198                 case '?':
 199                 default:
 200                         usage((char *)NULL);
 201                 }
 202         argc -= optind;
 203         argv += optind;
 204
 205         if (argc < 1)
 206                 usage((char *)NULL);
 207
 208 #ifndef __APPLE__
 209         if (killflg + doreboot + dohalt + dopower > 1)
 210                 usage("incompatible switches -h, -k, -p and -r");
 211
 212         if (oflag && !(dohalt || dopower || doreboot))
 213                 usage("-o requires -h, -p or -r");
 214
 215         if (nosync != NULL && !oflag)
 216                 usage("-n requires -o");
 217 #else /* !__APPLE__ */
 218         if (killflg + doreboot + dohalt + dosleep > 1)
 219                 usage("incompatible switches -h, -k, -r, and -s");
 220
 221         if (!(dohalt || doreboot || dosleep || killflg))
 222                 usage("-h, -r, -s, or -k is required");
 223
 224         if (doups && !dohalt)
 225                 usage("-u requires -h");
 226 #endif /* !__APPLE__ */
 227
 228         getoffset(*argv++);
 229
 230         if (*argv) {
 231                 for (p = mbuf, len = sizeof(mbuf); *argv; ++argv) {
 232                         arglen = strlen(*argv);
 233                         if ((len -= arglen) <= 2)
 234                                 break;
 235                         if (p != mbuf)
 236                                 *p++ = ' ';
 237                         memmove(p, *argv, arglen);
 238                         p += arglen;
 239                 }
 240                 *p = '\n';
 241                 *++p = '\0';
 242         }
 243
 244         if (readstdin) {
 245                 p = mbuf;
 246                 endp = mbuf + sizeof(mbuf) - 2;
 247                 for (;;) {
 248                         if (!fgets(p, (int)(endp - p + 1), stdin))
 249                                 break;
 250                         for (; *p &&  p < endp; ++p);
 251                         if (p == endp) {
 252                                 *p = '\n';
 253                                 *++p = '\0';
 254                                 break;
 255                         }
 256                 }
 257         }
 258         mbuflen = strlen(mbuf);
 259
 260         if (offset)
 261                 (void)printf("Shutdown at %.24s.\n", ctime(&shuttime));
 262         else
 263                 (void)printf("Shutdown NOW!\n");
 264
 265         if (!(whom = getlogin()))
 266                 whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
 267
 268 #ifdef DEBUG
 269         audit_shutdown(0);
 270         (void)putc('\n', stdout);
 271 #else
 272         (void)setpriority(PRIO_PROCESS, 0, PRIO_MIN);
 273 #ifdef __APPLE__
 274         if (offset) {
 275 #else
 276         {
 277 #endif
 278                 int forkpid;
 279
 280                 forkpid = fork();
 281                 if (forkpid == -1) {
 282                         audit_shutdown(1);
 283                         err(1, "fork");
 284                 }
 285                 if (forkpid)
 286                         errx(0, "[pid %d]", forkpid);
 287 #ifdef __APPLE__
 288                 /* 5863185: reboot2() needs to talk to launchd. */
 289                 if (_vprocmgr_detach_from_console(0) != NULL)
 290                         warnx("can't detach from console");
 291 #endif /* __APPLE__ */
 292         }
 293         audit_shutdown(0);
 294         setsid();
 295 #endif
 296         openlog("shutdown", LOG_CONS, LOG_AUTH);
 297         loop();
 298         return(0);
 299 }
 300
 301 void
 302 loop(void)
 303 {
 304         struct interval *tp;
 305         u_int sltime;
 306         int logged;
 307
 308         if (offset <= NOLOG_TIME) {
 309                 logged = 1;
 310                 nolog();
 311         }
 312         else
 313                 logged = 0;
 314         tp = tlist;
 315         if (tp->timeleft < offset)
 316                 (void)sleep((u_int)(offset - tp->timeleft));
 317         else {
 318                 while (tp->timeleft && offset < tp->timeleft)
 319                         ++tp;
 320                 /*
 321                  * Warn now, if going to sleep more than a fifth of
 322                  * the next wait time.
 323                  */
 324                 if ((sltime = (u_int)(offset - tp->timeleft))) {
 325                         if (sltime > (tp->timetowait / 5))
 326                                 timewarn(offset);
 327                         (void)sleep(sltime);
 328                 }
 329         }
 330         for (;; ++tp) {
 331                 timewarn(tp->timeleft);
 332                 if (!logged && tp->timeleft <= NOLOG_TIME) {
 333                         logged = 1;
 334                         nolog();
 335                 }
 336                 (void)sleep((u_int)tp->timetowait);
 337                 if (!tp->timeleft)
 338                         break;
 339         }
 340 #ifdef __APPLE__
 341         log_and_exec_reboot_or_halt();
 342 #else
 343         die_you_gravy_sucking_pig_dog();
 344 #endif
 345 }
 346
 347 static jmp_buf alarmbuf;
 348
 349 static const char *restricted_environ[] = {
 350         "PATH=" _PATH_STDPATH,
 351         NULL
 352 };
 353
 354 void
 355 timewarn(time_t timeleft)
 356 {
 357         static int first;
 358         static char hostname[MAXHOSTNAMELEN + 1];
 359         FILE *pf;
 360         char wcmd[MAXPATHLEN + 4];
 361
 362         /* wall is sometimes missing, e.g. on install media */
 363         if (access(_PATH_WALL, X_OK) == -1) return;
 364
 365         if (!first++)
 366                 (void)gethostname(hostname, sizeof(hostname));
 367
 368         /* undoc -n option to wall suppresses normal wall banner */
 369         (void)snprintf(wcmd, sizeof(wcmd), "%s -n", _PATH_WALL);
 370         environ = restricted_environ;
 371         if (!(pf = popen(wcmd, "w"))) {
 372                 syslog(LOG_ERR, "shutdown: can't find %s: %m", _PATH_WALL);
 373                 return;
 374         }
 375
 376         (void)fprintf(pf,
 377             "\007*** %sSystem shutdown message from %s@%s ***\007\n",
 378             timeleft ? "": "FINAL ", whom, hostname);
 379
 380         if (timeleft > 10*60)
 381                 (void)fprintf(pf, "System going down at %5.5s\n\n",
 382                     ctime(&shuttime) + 11);
 383         else if (timeleft > 59)
 384                 (void)fprintf(pf, "System going down in %ld minute%s\n\n",
 385                     timeleft / 60, (timeleft > 60) ? "s" : "");
 386         else if (timeleft)
 387                 (void)fprintf(pf, "System going down in 30 seconds\n\n");
 388         else
 389                 (void)fprintf(pf, "System going down IMMEDIATELY\n\n");
 390
 391         if (mbuflen)
 392                 (void)fwrite(mbuf, sizeof(*mbuf), mbuflen, pf);
 393
 394         /*
 395          * play some games, just in case wall doesn't come back
 396          * probably unnecessary, given that wall is careful.
 397          */
 398         if (!setjmp(alarmbuf)) {
 399                 (void)signal(SIGALRM, timeout);
 400                 (void)alarm((u_int)30);
 401                 (void)pclose(pf);
 402                 (void)alarm((u_int)0);
 403                 (void)signal(SIGALRM, SIG_DFL);
 404         }
 405 }
 406
 407 void
 408 timeout(int signo __unused)
 409 {
 410         longjmp(alarmbuf, 1);
 411 }
 412
 413 void
 414 #ifdef __APPLE__
 415 log_and_exec_reboot_or_halt()
 416 #else
 417 die_you_gravy_sucking_pig_dog()
 418 #endif
 419 {
 420 #ifndef __APPLE__
 421         char *empty_environ[] = { NULL };
 422 #else
 423         if ((errno = reserve_reboot())) {
 424                 warn("couldn't lock for reboot");
 425                 finish(0);
 426         }
 427 #endif
 428
 429         syslog(LOG_NOTICE, "%s%s by %s: %s",
 430 #ifndef __APPLE__
 431             doreboot ? "reboot" : dohalt ? "halt" : dopower ? "power-down" :
 432 #else
 433             doreboot ? "reboot" : dohalt ? "halt" : dosleep ? "sleep" :
 434 #endif
 435             "shutdown", doups?" with UPS delay":"", whom, mbuf);
 436 #ifndef __APPLE__
 437         (void)sleep(2);
 438 #endif
 439
 440         (void)printf("\r\nSystem shutdown time has arrived\007\007\r\n");
 441         if (killflg) {
 442                 (void)printf("\rbut you'll have to do it yourself\r\n");
 443                 exit(0);
 444         }
 445 #ifdef DEBUG
 446         if (doreboot)
 447                 (void)printf("reboot");
 448         else if (dohalt)
 449                 (void)printf("halt");
 450 #ifndef __APPLE__
 451         else if (dopower)
 452                 (void)printf("power-down");
 453         if (nosync != NULL)
 454                 (void)printf(" no sync");
 455 #else
 456         else if (dosleep)
 457                 (void)printf("sleep");
 458 #endif
 459         (void)printf("\nkill -HUP 1\n");
 460 #else
 461 #ifdef __APPLE__
 462         if (dosleep) {
 463                 mach_port_t mp;
 464                 io_connect_t fb;
 465                 kern_return_t kr = IOMasterPort(bootstrap_port, &mp);
 466                 if (kr == kIOReturnSuccess) {
 467                         fb = IOPMFindPowerManagement(mp);
 468                         if (fb != IO_OBJECT_NULL) {
 469                                 IOReturn err = IOPMSleepSystem(fb);
 470                                 if (err != kIOReturnSuccess) {
 471                                         fprintf(stderr, "shutdown: sleep failed (0x%08x)\n", err);
 472                                         kr = -1;
 473                                 }
 474                         }
 475                 }
 476         } else {
 477                 int howto = 0;
 478
 479 #if defined(__APPLE__)
 480                 {
 481                         struct utmpx utx;
 482                         bzero(&utx, sizeof(utx));
 483                         utx.ut_type = SHUTDOWN_TIME;
 484                         gettimeofday(&utx.ut_tv, NULL);
 485                         pututxline(&utx);
 486                 }
 487 #else
 488                 logwtmp("~", "shutdown", "");
 489 #endif
 490
 491                 if (dohalt) howto |= RB_HALT;
 492                 if (doups) howto |= RB_UPSDELAY;
 493                 if (nosync) howto |= RB_NOSYNC;
 494
 495                 // launchd(8) handles reboot.  This call returns NULL on success.
 496                 if (reboot3(howto)) {
 497                         syslog(LOG_ERR, "shutdown: launchd reboot failed.");
 498                 }
 499         }
 500 #else /* __APPLE__ */
 501         if (!oflag) {
 502                 (void)kill(1, doreboot ? SIGINT :       /* reboot */
 503                               dohalt ? SIGUSR1 :        /* halt */
 504                               dopower ? SIGUSR2 :       /* power-down */
 505                               SIGTERM);                 /* single-user */
 506         } else {
 507                 if (doreboot) {
 508                         execle(_PATH_REBOOT, "reboot", "-l", nosync,
 509                                 (char *)NULL, empty_environ);
 510                         syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
 511                                 _PATH_REBOOT);
 512                         warn(_PATH_REBOOT);
 513                 }
 514                 else if (dohalt) {
 515                         execle(_PATH_HALT, "halt", "-l", nosync,
 516                                 (char *)NULL, empty_environ);
 517                         syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
 518                                 _PATH_HALT);
 519                         warn(_PATH_HALT);
 520                 }
 521                 else if (dopower) {
 522                         execle(_PATH_HALT, "halt", "-l", "-p", nosync,
 523                                 (char *)NULL, empty_environ);
 524                         syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
 525                                 _PATH_HALT);
 526                         warn(_PATH_HALT);
 527                 }
 528                 (void)kill(1, SIGTERM);         /* to single-user */
 529         }
 530 #endif /* __APPLE__ */
 531 #endif
 532         finish(0);
 533 }
 534
 535 #define ATOI2(p)        (p[0] - '0') * 10 + (p[1] - '0'); p += 2;
 536
 537 void
 538 getoffset(char *timearg)
 539 {
 540         struct tm *lt;
 541         char *p;
 542         time_t now;
 543         int this_year;
 544
 545         (void)time(&now);
 546
 547         if (!strcasecmp(timearg, "now")) {              /* now */
 548                 offset = 0;
 549                 shuttime = now;
 550                 return;
 551         }
 552
 553         if (*timearg == '+') {                          /* +minutes */
 554                 if (!isdigit(*++timearg))
 555                         badtime();
 556                 if ((offset = atoi(timearg) * 60) < 0)
 557                         badtime();
 558                 shuttime = now + offset;
 559                 return;
 560         }
 561
 562         /* handle hh:mm by getting rid of the colon */
 563         for (p = timearg; *p; ++p)
 564                 if (!isascii(*p) || !isdigit(*p)) {
 565                         if (*p == ':' && strlen(p) == 3) {
 566                                 p[0] = p[1];
 567                                 p[1] = p[2];
 568                                 p[2] = '\0';
 569                         }
 570                         else
 571                                 badtime();
 572                 }
 573
 574         unsetenv("TZ");                                 /* OUR timezone */
 575         lt = localtime(&now);                           /* current time val */
 576
 577         switch(strlen(timearg)) {
 578         case 10:
 579                 this_year = lt->tm_year;
 580                 lt->tm_year = ATOI2(timearg);
 581                 /*
 582                  * check if the specified year is in the next century.
 583                  * allow for one year of user error as many people will
 584                  * enter n - 1 at the start of year n.
 585                  */
 586                 if (lt->tm_year < (this_year % 100) - 1)
 587                         lt->tm_year += 100;
 588                 /* adjust for the year 2000 and beyond */
 589                 lt->tm_year += (this_year - (this_year % 100));
 590                 /* FALLTHROUGH */
 591         case 8:
 592                 lt->tm_mon = ATOI2(timearg);
 593                 if (--lt->tm_mon < 0 || lt->tm_mon > 11)
 594                         badtime();
 595                 /* FALLTHROUGH */
 596         case 6:
 597                 lt->tm_mday = ATOI2(timearg);
 598                 if (lt->tm_mday < 1 || lt->tm_mday > 31)
 599                         badtime();
 600                 /* FALLTHROUGH */
 601         case 4:
 602                 lt->tm_hour = ATOI2(timearg);
 603                 if (lt->tm_hour < 0 || lt->tm_hour > 23)
 604                         badtime();
 605                 lt->tm_min = ATOI2(timearg);
 606                 if (lt->tm_min < 0 || lt->tm_min > 59)
 607                         badtime();
 608                 lt->tm_sec = 0;
 609                 if ((shuttime = mktime(lt)) == -1)
 610                         badtime();
 611                 if ((offset = shuttime - now) < 0)
 612                         errx(1, "that time is already past.");
 613                 break;
 614         default:
 615                 badtime();
 616         }
 617 }
 618
 619 #define NOMSG   "\n\nNO LOGINS: System going down at "
 620 void
 621 nolog(void)
 622 {
 623         int logfd;
 624         char *ct;
 625
 626         (void)unlink(_PATH_NOLOGIN);    /* in case linked to another file */
 627         (void)signal(SIGINT, finish);
 628         (void)signal(SIGHUP, finish);
 629         (void)signal(SIGQUIT, finish);
 630         (void)signal(SIGTERM, finish);
 631         if ((logfd = open(_PATH_NOLOGIN, O_WRONLY|O_CREAT|O_TRUNC,
 632             0664)) >= 0) {
 633                 (void)write(logfd, NOMSG, sizeof(NOMSG) - 1);
 634                 ct = ctime(&shuttime);
 635                 (void)write(logfd, ct + 11, 5);
 636                 (void)write(logfd, "\n\n", 2);
 637                 (void)write(logfd, mbuf, strlen(mbuf));
 638                 (void)close(logfd);
 639         }
 640 }
 641
 642 void
 643 finish(int signo __unused)
 644 {
 645         if (!killflg)
 646                 (void)unlink(_PATH_NOLOGIN);
 647         exit(0);
 648 }
 649
 650 void
 651 badtime(void)
 652 {
 653         errx(1, "bad time format");
 654 }
 655
 656 void
 657 usage(const char *cp)
 658 {
 659         if (cp != NULL)
 660                 warnx("%s", cp);
 661         (void)fprintf(stderr,
 662 #ifdef __APPLE__
 663             "usage: shutdown [-] [-h [-u] [-n] | -r [-n] | -s | -k]"
 664 #else
 665             "usage: shutdown [-] [-h | -p | -r | -k] [-o [-n]]"
 666 #endif
 667             " time [warning-message ...]\n");
 668         exit(1);
 669 }
 670
 671 #ifdef __APPLE__
 672 /*
 673  * The following tokens are included in the audit record for shutdown
 674  * header
 675  * subject
 676  * return
 677  */
 678 int
 679 audit_shutdown(int exitstatus)
 680 {
 681         int aufd;
 682         token_t *tok;
 683         long au_cond;
 684
 685         /* If we are not auditing, don't cut an audit record; just return */
 686         if (auditon(A_GETCOND, &au_cond, sizeof(long)) < 0) {
 687                 fprintf(stderr, "shutdown: Could not determine audit condition\n");
 688                 return 0;
 689         }
 690         if (au_cond == AUC_NOAUDIT)
 691                 return 0;
 692
 693         if((aufd = au_open()) == -1) {
 694                 fprintf(stderr, "shutdown: Audit Error: au_open() failed\n");
 695                 exit(1);
 696         }
 697
 698         /* The subject that performed the operation */
 699         if((tok = au_to_me()) == NULL) {
 700                 fprintf(stderr, "shutdown: Audit Error: au_to_me() failed\n");
 701                 exit(1);
 702         }
 703         au_write(aufd, tok);
 704
 705         /* success and failure status */
 706         if((tok = au_to_return32(exitstatus, errno)) == NULL) {
 707                 fprintf(stderr, "shutdown: Audit Error: au_to_return32() failed\n");
 708                 exit(1);
 709         }
 710         au_write(aufd, tok);
 711
 712         if(au_close(aufd, 1, AUE_shutdown) == -1) {
 713                 fprintf(stderr, "shutdown: Audit Error: au_close() failed\n");
 714                 exit(1);
 715         }
 716         return 1;
 717 }
 718
 719
 720 // XX copied from reboot.tproj/reboot.c; it would be nice to share the code
 721
 722 #define WAITFORLOCK 1
 723 /*
 724  * contact kextd to lock for reboot
 725  */
 726 int
 727 reserve_reboot(void)
 728 {
 729     int rval = ELAST + 1;
 730     kern_return_t macherr = KERN_FAILURE;
 731     mach_port_t kxport, tport = MACH_PORT_NULL, myport = MACH_PORT_NULL;
 732     int busyStatus = ELAST + 1;
 733     mountpoint_t busyVol;
 734
 735     macherr = bootstrap_look_up2(bootstrap_port, KEXTD_SERVER_NAME, &kxport, 0, BOOTSTRAP_PRIVILEGED_SERVER);
 736     if (macherr)  goto finish;
 737
 738     // allocate a port to pass to kextd (in case we die)
 739     tport = mach_task_self();
 740     if (tport == MACH_PORT_NULL)  goto finish;
 741     macherr = mach_port_allocate(tport, MACH_PORT_RIGHT_RECEIVE, &myport);
 742     if (macherr)  goto finish;
 743
 744     // try to lock for reboot
 745     macherr = kextmanager_lock_reboot(kxport, myport, !WAITFORLOCK, busyVol,
 746                                       &busyStatus);
 747     if (macherr)  goto finish;
 748
 749     if (busyStatus == EBUSY) {
 750         warnx("%s is busy updating; waiting for lock", busyVol);
 751         macherr = kextmanager_lock_reboot(kxport, myport, WAITFORLOCK,
 752                                           busyVol, &busyStatus);
 753         if (macherr)    goto finish;
 754     }
 755
 756     if (busyStatus == EALREADY) {
 757         // reboot already in progress
 758         rval = 0;
 759     } else {
 760         rval = busyStatus;
 761     }
 762
 763 finish:
 764     // in general, we want to err on the side of allowing the reboot
 765     if (macherr) {
 766         if (macherr != BOOTSTRAP_UNKNOWN_SERVICE)
 767             warnx("WARNING: couldn't lock kext manager for reboot: %s",
 768                     mach_error_string(macherr));
 769         rval = 0;
 770     }
 771     // unless we got the lock, clean up our port
 772     if (busyStatus != 0 && myport != MACH_PORT_NULL)
 773         mach_port_mod_refs(tport, myport, MACH_PORT_RIGHT_RECEIVE, -1);
 774
 775     return rval;
 776 }
 777 #endif /* __APPLE__ */