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 #include <sys/sysctl.h>
  82
  83 #include "pathnames.h"
  84 #endif /* __APPLE__ */
  85
  86 #ifdef DEBUG
  87 #undef _PATH_NOLOGIN
  88 #define _PATH_NOLOGIN   "./nologin"
  89 #endif
  90
  91 #define H               *60*60
  92 #define M               *60
  93 #define S               *1
  94 #define NOLOG_TIME      5*60
  95 struct interval {
  96         int timeleft, timetowait;
  97 } tlist[] = {
  98         { 10 H,  5 H },
  99         {  5 H,  3 H },
 100         {  2 H,  1 H },
 101         {  1 H, 30 M },
 102         { 30 M, 10 M },
 103         { 20 M, 10 M },
 104         { 10 M,  5 M },
 105         {  5 M,  3 M },
 106         {  2 M,  1 M },
 107         {  1 M, 30 S },
 108         { 30 S, 30 S },
 109         {  0  ,  0   }
 110 };
 111 #undef H
 112 #undef M
 113 #undef S
 114
 115 static time_t offset, shuttime;
 116 #ifdef __APPLE__
 117 static int dohalt, doreboot, doups, killflg, oflag;
 118 static size_t mbuflen;
 119 #else
 120 static int dohalt, dopower, doreboot, killflg, mbuflen, oflag;
 121 #endif
 122 static char mbuf[BUFSIZ];
 123 static const char *nosync, *whom;
 124 #ifdef __APPLE__
 125 static int dosleep;
 126 #endif
 127
 128 void badtime(void);
 129 #ifdef __APPLE__
 130 void log_and_exec_reboot_or_halt(void);
 131 #else
 132 void die_you_gravy_sucking_pig_dog(void);
 133 #endif
 134 void finish(int);
 135 void getoffset(char *);
 136 void loop(void);
 137 void nolog(void);
 138 void timeout(int);
 139 void timewarn(time_t);
 140 void usage(const char *);
 141 #ifdef __APPLE__
 142 int audit_shutdown(int);
 143 int reserve_reboot(void);
 144 #endif
 145
 146 extern const char **environ;
 147
 148 int
 149 main(int argc, char **argv)
 150 {
 151         char *p, *endp;
 152         struct passwd *pw;
 153         size_t arglen;
 154         int ch, len, readstdin;
 155
 156 #ifndef DEBUG
 157         if (geteuid())
 158                 errx(1, "NOT super-user");
 159 #endif
 160         nosync = NULL;
 161         readstdin = 0;
 162 #ifndef __APPLE__
 163         while ((ch = getopt(argc, argv, "-hknopr")) != -1)
 164 #else
 165         while ((ch = getopt(argc, argv, "-hknorsu")) != -1)
 166 #endif
 167                 switch (ch) {
 168                 case '-':
 169                         readstdin = 1;
 170                         break;
 171                 case 'h':
 172                         dohalt = 1;
 173                         break;
 174                 case 'k':
 175                         killflg = 1;
 176                         break;
 177                 case 'n':
 178                         nosync = "-n";
 179                         break;
 180                 case 'o':
 181                         oflag = 1;
 182                         break;
 183 #ifndef __APPLE__
 184                 case 'p':
 185                         dopower = 1;
 186                         break;
 187 #endif
 188         case 'u':
 189             doups = 1;
 190             break;
 191                 case 'r':
 192                         doreboot = 1;
 193                         break;
 194 #ifdef __APPLE__
 195                 case 's':
 196                         dosleep = 1;
 197                         break;
 198 #endif
 199                 case '?':
 200                 default:
 201                         usage((char *)NULL);
 202                 }
 203         argc -= optind;
 204         argv += optind;
 205
 206         if (argc < 1)
 207                 usage((char *)NULL);
 208
 209 #ifndef __APPLE__
 210         if (killflg + doreboot + dohalt + dopower > 1)
 211                 usage("incompatible switches -h, -k, -p and -r");
 212
 213         if (oflag && !(dohalt || dopower || doreboot))
 214                 usage("-o requires -h, -p or -r");
 215
 216         if (nosync != NULL && !oflag)
 217                 usage("-n requires -o");
 218 #else /* !__APPLE__ */
 219         if (killflg + doreboot + dohalt + dosleep > 1)
 220                 usage("incompatible switches -h, -k, -r, and -s");
 221
 222         if (!(dohalt || doreboot || dosleep || killflg))
 223                 usage("-h, -r, -s, or -k is required");
 224
 225         if (doups && !dohalt)
 226                 usage("-u requires -h");
 227 #endif /* !__APPLE__ */
 228
 229         getoffset(*argv++);
 230
 231         if (*argv) {
 232                 for (p = mbuf, len = sizeof(mbuf); *argv; ++argv) {
 233                         arglen = strlen(*argv);
 234                         if ((len -= arglen) <= 2)
 235                                 break;
 236                         if (p != mbuf)
 237                                 *p++ = ' ';
 238                         memmove(p, *argv, arglen);
 239                         p += arglen;
 240                 }
 241                 *p = '\n';
 242                 *++p = '\0';
 243         }
 244
 245         if (readstdin) {
 246                 p = mbuf;
 247                 endp = mbuf + sizeof(mbuf) - 2;
 248                 for (;;) {
 249                         if (!fgets(p, (int)(endp - p + 1), stdin))
 250                                 break;
 251                         for (; *p &&  p < endp; ++p);
 252                         if (p == endp) {
 253                                 *p = '\n';
 254                                 *++p = '\0';
 255                                 break;
 256                         }
 257                 }
 258         }
 259         mbuflen = strlen(mbuf);
 260
 261         if (offset)
 262                 (void)printf("Shutdown at %.24s.\n", ctime(&shuttime));
 263         else
 264                 (void)printf("Shutdown NOW!\n");
 265
 266         if (!(whom = getlogin()))
 267                 whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
 268
 269 #ifdef DEBUG
 270         audit_shutdown(0);
 271         (void)putc('\n', stdout);
 272 #else
 273         (void)setpriority(PRIO_PROCESS, 0, PRIO_MIN);
 274 #ifdef __APPLE__
 275         if (offset) {
 276 #else
 277         {
 278 #endif
 279                 int forkpid;
 280
 281                 forkpid = fork();
 282                 if (forkpid == -1) {
 283                         audit_shutdown(1);
 284                         err(1, "fork");
 285                 }
 286                 if (forkpid)
 287                         errx(0, "[pid %d]", forkpid);
 288 #ifdef __APPLE__
 289                 /* 5863185: reboot2() needs to talk to launchd. */
 290                 if (_vprocmgr_detach_from_console(0) != NULL)
 291                         warnx("can't detach from console");
 292 #endif /* __APPLE__ */
 293         }
 294         audit_shutdown(0);
 295         setsid();
 296 #endif
 297         openlog("shutdown", LOG_CONS, LOG_AUTH);
 298         loop();
 299         return(0);
 300 }
 301
 302 void
 303 loop(void)
 304 {
 305         struct interval *tp;
 306         u_int sltime;
 307         int logged;
 308
 309         if (offset <= NOLOG_TIME) {
 310                 logged = 1;
 311                 nolog();
 312         }
 313         else
 314                 logged = 0;
 315         tp = tlist;
 316         if (tp->timeleft < offset)
 317                 (void)sleep((u_int)(offset - tp->timeleft));
 318         else {
 319                 while (tp->timeleft && offset < tp->timeleft)
 320                         ++tp;
 321                 /*
 322                  * Warn now, if going to sleep more than a fifth of
 323                  * the next wait time.
 324                  */
 325                 if ((sltime = (u_int)(offset - tp->timeleft))) {
 326                         if (sltime > (tp->timetowait / 5))
 327                                 timewarn(offset);
 328                         (void)sleep(sltime);
 329                 }
 330         }
 331         for (;; ++tp) {
 332                 timewarn(tp->timeleft);
 333                 if (!logged && tp->timeleft <= NOLOG_TIME) {
 334                         logged = 1;
 335                         nolog();
 336                 }
 337                 (void)sleep((u_int)tp->timetowait);
 338                 if (!tp->timeleft)
 339                         break;
 340         }
 341 #ifdef __APPLE__
 342         log_and_exec_reboot_or_halt();
 343 #else
 344         die_you_gravy_sucking_pig_dog();
 345 #endif
 346 }
 347
 348 static jmp_buf alarmbuf;
 349
 350 static const char *restricted_environ[] = {
 351         "PATH=" _PATH_STDPATH,
 352         NULL
 353 };
 354
 355 void
 356 timewarn(time_t timeleft)
 357 {
 358         static int first;
 359         static char hostname[MAXHOSTNAMELEN + 1];
 360         FILE *pf;
 361         char wcmd[MAXPATHLEN + 4];
 362
 363         /* wall is sometimes missing, e.g. on install media */
 364         if (access(_PATH_WALL, X_OK) == -1) return;
 365
 366         if (!first++)
 367                 (void)gethostname(hostname, sizeof(hostname));
 368
 369         /* undoc -n option to wall suppresses normal wall banner */
 370         (void)snprintf(wcmd, sizeof(wcmd), "%s -n", _PATH_WALL);
 371         environ = restricted_environ;
 372         if (!(pf = popen(wcmd, "w"))) {
 373                 syslog(LOG_ERR, "shutdown: can't find %s: %m", _PATH_WALL);
 374                 return;
 375         }
 376
 377         (void)fprintf(pf,
 378             "\007*** %sSystem shutdown message from %s@%s ***\007\n",
 379             timeleft ? "": "FINAL ", whom, hostname);
 380
 381         if (timeleft > 10*60)
 382                 (void)fprintf(pf, "System going down at %5.5s\n\n",
 383                     ctime(&shuttime) + 11);
 384         else if (timeleft > 59)
 385                 (void)fprintf(pf, "System going down in %ld minute%s\n\n",
 386                     timeleft / 60, (timeleft > 60) ? "s" : "");
 387         else if (timeleft)
 388                 (void)fprintf(pf, "System going down in 30 seconds\n\n");
 389         else
 390                 (void)fprintf(pf, "System going down IMMEDIATELY\n\n");
 391
 392         if (mbuflen)
 393                 (void)fwrite(mbuf, sizeof(*mbuf), mbuflen, pf);
 394
 395         /*
 396          * play some games, just in case wall doesn't come back
 397          * probably unnecessary, given that wall is careful.
 398          */
 399         if (!setjmp(alarmbuf)) {
 400                 (void)signal(SIGALRM, timeout);
 401                 (void)alarm((u_int)30);
 402                 (void)pclose(pf);
 403                 (void)alarm((u_int)0);
 404                 (void)signal(SIGALRM, SIG_DFL);
 405         }
 406 }
 407
 408 void
 409 timeout(int signo __unused)
 410 {
 411         longjmp(alarmbuf, 1);
 412 }
 413
 414 void
 415 #ifdef __APPLE__
 416 log_and_exec_reboot_or_halt()
 417 #else
 418 die_you_gravy_sucking_pig_dog()
 419 #endif
 420 {
 421 #ifndef __APPLE__
 422         char *empty_environ[] = { NULL };
 423 #else
 424         if ((errno = reserve_reboot())) {
 425                 warn("couldn't lock for reboot");
 426                 finish(0);
 427         }
 428 #endif
 429
 430         syslog(LOG_NOTICE, "%s%s by %s: %s",
 431 #ifndef __APPLE__
 432             doreboot ? "reboot" : dohalt ? "halt" : dopower ? "power-down" :
 433 #else
 434             doreboot ? "reboot" : dohalt ? "halt" : dosleep ? "sleep" :
 435 #endif
 436             "shutdown", doups?" with UPS delay":"", whom, mbuf);
 437 #ifndef __APPLE__
 438         (void)sleep(2);
 439 #endif
 440
 441         (void)printf("\r\nSystem shutdown time has arrived\007\007\r\n");
 442         if (killflg) {
 443                 (void)printf("\rbut you'll have to do it yourself\r\n");
 444                 exit(0);
 445         }
 446 #ifdef DEBUG
 447         if (doreboot)
 448                 (void)printf("reboot");
 449         else if (dohalt)
 450                 (void)printf("halt");
 451 #ifndef __APPLE__
 452         else if (dopower)
 453                 (void)printf("power-down");
 454         if (nosync != NULL)
 455                 (void)printf(" no sync");
 456 #else
 457         else if (dosleep)
 458                 (void)printf("sleep");
 459 #endif
 460         (void)printf("\nkill -HUP 1\n");
 461 #else
 462 #ifdef __APPLE__
 463         if (dosleep) {
 464                 mach_port_t mp;
 465                 io_connect_t fb;
 466                 kern_return_t kr = IOMasterPort(bootstrap_port, &mp);
 467                 if (kr == kIOReturnSuccess) {
 468                         fb = IOPMFindPowerManagement(mp);
 469                         if (fb != IO_OBJECT_NULL) {
 470                                 IOReturn err = IOPMSleepSystem(fb);
 471                                 if (err != kIOReturnSuccess) {
 472                                         fprintf(stderr, "shutdown: sleep failed (0x%08x)\n", err);
 473                                         kr = -1;
 474                                 }
 475                         }
 476                 }
 477         } else {
 478                 int howto = 0;
 479
 480 #if defined(__APPLE__)
 481                 {
 482                         struct utmpx utx;
 483                         bzero(&utx, sizeof(utx));
 484                         utx.ut_type = SHUTDOWN_TIME;
 485                         gettimeofday(&utx.ut_tv, NULL);
 486                         pututxline(&utx);
 487
 488                         int newvalue = 1;
 489                         sysctlbyname("kern.willshutdown", NULL, NULL, &newvalue, sizeof(newvalue));
 490                 }
 491 #else
 492                 logwtmp("~", "shutdown", "");
 493 #endif
 494
 495                 if (dohalt) howto |= RB_HALT;
 496                 if (doups) howto |= RB_UPSDELAY;
 497                 if (nosync) howto |= RB_NOSYNC;
 498
 499                 // launchd(8) handles reboot.  This call returns NULL on success.
 500                 if (reboot3(howto)) {
 501                         syslog(LOG_ERR, "shutdown: launchd reboot failed.");
 502                 }
 503         }
 504 #else /* __APPLE__ */
 505         if (!oflag) {
 506                 (void)kill(1, doreboot ? SIGINT :       /* reboot */
 507                               dohalt ? SIGUSR1 :        /* halt */
 508                               dopower ? SIGUSR2 :       /* power-down */
 509                               SIGTERM);                 /* single-user */
 510         } else {
 511                 if (doreboot) {
 512                         execle(_PATH_REBOOT, "reboot", "-l", nosync,
 513                                 (char *)NULL, empty_environ);
 514                         syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
 515                                 _PATH_REBOOT);
 516                         warn(_PATH_REBOOT);
 517                 }
 518                 else if (dohalt) {
 519                         execle(_PATH_HALT, "halt", "-l", nosync,
 520                                 (char *)NULL, empty_environ);
 521                         syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
 522                                 _PATH_HALT);
 523                         warn(_PATH_HALT);
 524                 }
 525                 else if (dopower) {
 526                         execle(_PATH_HALT, "halt", "-l", "-p", nosync,
 527                                 (char *)NULL, empty_environ);
 528                         syslog(LOG_ERR, "shutdown: can't exec %s: %m.",
 529                                 _PATH_HALT);
 530                         warn(_PATH_HALT);
 531                 }
 532                 (void)kill(1, SIGTERM);         /* to single-user */
 533         }
 534 #endif /* __APPLE__ */
 535 #endif
 536         finish(0);
 537 }
 538
 539 #define ATOI2(p)        (p[0] - '0') * 10 + (p[1] - '0'); p += 2;
 540
 541 void
 542 getoffset(char *timearg)
 543 {
 544         struct tm *lt;
 545         char *p;
 546         time_t now;
 547         int this_year;
 548
 549         (void)time(&now);
 550
 551         if (!strcasecmp(timearg, "now")) {              /* now */
 552                 offset = 0;
 553                 shuttime = now;
 554                 return;
 555         }
 556
 557         if (*timearg == '+') {                          /* +minutes */
 558                 if (!isdigit(*++timearg))
 559                         badtime();
 560                 if ((offset = atoi(timearg) * 60) < 0)
 561                         badtime();
 562                 shuttime = now + offset;
 563                 return;
 564         }
 565
 566         /* handle hh:mm by getting rid of the colon */
 567         for (p = timearg; *p; ++p)
 568                 if (!isascii(*p) || !isdigit(*p)) {
 569                         if (*p == ':' && strlen(p) == 3) {
 570                                 p[0] = p[1];
 571                                 p[1] = p[2];
 572                                 p[2] = '\0';
 573                         }
 574                         else
 575                                 badtime();
 576                 }
 577
 578         unsetenv("TZ");                                 /* OUR timezone */
 579         lt = localtime(&now);                           /* current time val */
 580
 581         switch(strlen(timearg)) {
 582         case 10:
 583                 this_year = lt->tm_year;
 584                 lt->tm_year = ATOI2(timearg);
 585                 /*
 586                  * check if the specified year is in the next century.
 587                  * allow for one year of user error as many people will
 588                  * enter n - 1 at the start of year n.
 589                  */
 590                 if (lt->tm_year < (this_year % 100) - 1)
 591                         lt->tm_year += 100;
 592                 /* adjust for the year 2000 and beyond */
 593                 lt->tm_year += (this_year - (this_year % 100));
 594                 /* FALLTHROUGH */
 595         case 8:
 596                 lt->tm_mon = ATOI2(timearg);
 597                 if (--lt->tm_mon < 0 || lt->tm_mon > 11)
 598                         badtime();
 599                 /* FALLTHROUGH */
 600         case 6:
 601                 lt->tm_mday = ATOI2(timearg);
 602                 if (lt->tm_mday < 1 || lt->tm_mday > 31)
 603                         badtime();
 604                 /* FALLTHROUGH */
 605         case 4:
 606                 lt->tm_hour = ATOI2(timearg);
 607                 if (lt->tm_hour < 0 || lt->tm_hour > 23)
 608                         badtime();
 609                 lt->tm_min = ATOI2(timearg);
 610                 if (lt->tm_min < 0 || lt->tm_min > 59)
 611                         badtime();
 612                 lt->tm_sec = 0;
 613                 if ((shuttime = mktime(lt)) == -1)
 614                         badtime();
 615                 if ((offset = shuttime - now) < 0)
 616                         errx(1, "that time is already past.");
 617                 break;
 618         default:
 619                 badtime();
 620         }
 621 }
 622
 623 #define NOMSG   "\n\nNO LOGINS: System going down at "
 624 void
 625 nolog(void)
 626 {
 627         int logfd;
 628         char *ct;
 629
 630         (void)unlink(_PATH_NOLOGIN);    /* in case linked to another file */
 631         (void)signal(SIGINT, finish);
 632         (void)signal(SIGHUP, finish);
 633         (void)signal(SIGQUIT, finish);
 634         (void)signal(SIGTERM, finish);
 635         if ((logfd = open(_PATH_NOLOGIN, O_WRONLY|O_CREAT|O_TRUNC,
 636             0664)) >= 0) {
 637                 (void)write(logfd, NOMSG, sizeof(NOMSG) - 1);
 638                 ct = ctime(&shuttime);
 639                 (void)write(logfd, ct + 11, 5);
 640                 (void)write(logfd, "\n\n", 2);
 641                 (void)write(logfd, mbuf, strlen(mbuf));
 642                 (void)close(logfd);
 643         }
 644 }
 645
 646 void
 647 finish(int signo __unused)
 648 {
 649         if (!killflg)
 650                 (void)unlink(_PATH_NOLOGIN);
 651         exit(0);
 652 }
 653
 654 void
 655 badtime(void)
 656 {
 657         errx(1, "bad time format");
 658 }
 659
 660 void
 661 usage(const char *cp)
 662 {
 663         if (cp != NULL)
 664                 warnx("%s", cp);
 665         (void)fprintf(stderr,
 666 #ifdef __APPLE__
 667             "usage: shutdown [-] [-h [-u] [-n] | -r [-n] | -s | -k]"
 668 #else
 669             "usage: shutdown [-] [-h | -p | -r | -k] [-o [-n]]"
 670 #endif
 671             " time [warning-message ...]\n");
 672         exit(1);
 673 }
 674
 675 #ifdef __APPLE__
 676 /*
 677  * The following tokens are included in the audit record for shutdown
 678  * header
 679  * subject
 680  * return
 681  */
 682 int
 683 audit_shutdown(int exitstatus)
 684 {
 685         int aufd;
 686         token_t *tok;
 687         long au_cond;
 688
 689         /* If we are not auditing, don't cut an audit record; just return */
 690         if (auditon(A_GETCOND, &au_cond, sizeof(long)) < 0) {
 691                 fprintf(stderr, "shutdown: Could not determine audit condition\n");
 692                 return 0;
 693         }
 694         if (au_cond == AUC_NOAUDIT)
 695                 return 0;
 696
 697         if((aufd = au_open()) == -1) {
 698                 fprintf(stderr, "shutdown: Audit Error: au_open() failed\n");
 699                 exit(1);
 700         }
 701
 702         /* The subject that performed the operation */
 703         if((tok = au_to_me()) == NULL) {
 704                 fprintf(stderr, "shutdown: Audit Error: au_to_me() failed\n");
 705                 exit(1);
 706         }
 707         au_write(aufd, tok);
 708
 709         /* success and failure status */
 710         if((tok = au_to_return32(exitstatus, errno)) == NULL) {
 711                 fprintf(stderr, "shutdown: Audit Error: au_to_return32() failed\n");
 712                 exit(1);
 713         }
 714         au_write(aufd, tok);
 715
 716         if(au_close(aufd, 1, AUE_shutdown) == -1) {
 717                 fprintf(stderr, "shutdown: Audit Error: au_close() failed\n");
 718                 exit(1);
 719         }
 720         return 1;
 721 }
 722
 723
 724 // XX copied from reboot.tproj/reboot.c; it would be nice to share the code
 725
 726 #define WAITFORLOCK 1
 727 /*
 728  * contact kextd to lock for reboot
 729  */
 730 int
 731 reserve_reboot(void)
 732 {
 733     int rval = ELAST + 1;
 734     kern_return_t macherr = KERN_FAILURE;
 735     mach_port_t kxport, tport = MACH_PORT_NULL, myport = MACH_PORT_NULL;
 736     int busyStatus = ELAST + 1;
 737     mountpoint_t busyVol;
 738
 739     macherr = bootstrap_look_up2(bootstrap_port, KEXTD_SERVER_NAME, &kxport, 0, BOOTSTRAP_PRIVILEGED_SERVER);
 740     if (macherr)  goto finish;
 741
 742     // allocate a port to pass to kextd (in case we die)
 743     tport = mach_task_self();
 744     if (tport == MACH_PORT_NULL)  goto finish;
 745     macherr = mach_port_allocate(tport, MACH_PORT_RIGHT_RECEIVE, &myport);
 746     if (macherr)  goto finish;
 747
 748     // try to lock for reboot
 749     macherr = kextmanager_lock_reboot(kxport, myport, !WAITFORLOCK, busyVol,
 750                                       &busyStatus);
 751     if (macherr)  goto finish;
 752
 753     if (busyStatus == EBUSY) {
 754         warnx("%s is busy updating; waiting for lock", busyVol);
 755         macherr = kextmanager_lock_reboot(kxport, myport, WAITFORLOCK,
 756                                           busyVol, &busyStatus);
 757         if (macherr)    goto finish;
 758     }
 759
 760     if (busyStatus == EALREADY) {
 761         // reboot already in progress
 762         rval = 0;
 763     } else {
 764         rval = busyStatus;
 765     }
 766
 767 finish:
 768     // in general, we want to err on the side of allowing the reboot
 769     if (macherr) {
 770         if (macherr != BOOTSTRAP_UNKNOWN_SERVICE)
 771             warnx("WARNING: couldn't lock kext manager for reboot: %s",
 772                     mach_error_string(macherr));
 773         rval = 0;
 774     }
 775     // unless we got the lock, clean up our port
 776     if (busyStatus != 0 && myport != MACH_PORT_NULL)
 777         mach_port_mod_refs(tport, myport, MACH_PORT_RIGHT_RECEIVE, -1);
 778
 779     return rval;
 780 }
 781 #endif /* __APPLE__ */