scheduler/main.c

   1 /*
   2  * "$Id$"
   3  *
   4  * Main loop for the CUPS scheduler.
   5  *
   6  * Copyright 2007-2014 by Apple Inc.
   7  * Copyright 1997-2007 by Easy Software Products, all rights reserved.
   8  *
   9  * These coded instructions, statements, and computer programs are the
  10  * property of Apple Inc. and are protected by Federal copyright
  11  * law.  Distribution and use rights are outlined in the file "LICENSE.txt"
  12  * "LICENSE" which should have been included with this file.  If this
  13  * file is missing or damaged, see the license at "http://www.cups.org/".
  14  */
  15
  16 /*
  17  * Include necessary headers...
  18  */
  19
  20 #define _MAIN_C_
  21 #include "cupsd.h"
  22 #include <sys/resource.h>
  23 #include <syslog.h>
  24 #include <grp.h>
  25
  26 #ifdef HAVE_LAUNCH_H
  27 #  include <launch.h>
  28 #  include <libgen.h>
  29 #  define CUPS_KEEPALIVE CUPS_CACHEDIR "/org.cups.cupsd"
  30                                         /* Name of the launchd KeepAlive file */
  31 #  ifdef HAVE_LAUNCH_ACTIVATE_SOCKET
  32 /* Update when we have a public header we can include */
  33 extern int launch_activate_socket(const char *name, int **fds, size_t *cnt);
  34 #  endif /* HAVE_LAUNCH_ACTIVATE_SOCKET */
  35 #endif /* HAVE_LAUNCH_H */
  36
  37 #if defined(HAVE_MALLOC_H) && defined(HAVE_MALLINFO)
  38 #  include <malloc.h>
  39 #endif /* HAVE_MALLOC_H && HAVE_MALLINFO */
  40
  41 #ifdef HAVE_NOTIFY_H
  42 #  include <notify.h>
  43 #endif /* HAVE_NOTIFY_H */
  44
  45 #ifdef HAVE_SYS_PARAM_H
  46 #  include <sys/param.h>
  47 #endif /* HAVE_SYS_PARAM_H */
  48
  49
  50 /*
  51  * Local functions...
  52  */
  53
  54 #ifdef HAVE_LAUNCHD
  55 static void             launchd_checkin(void);
  56 static void             launchd_checkout(void);
  57 #endif /* HAVE_LAUNCHD */
  58 static void             parent_handler(int sig);
  59 static void             process_children(void);
  60 static void             sigchld_handler(int sig);
  61 static void             sighup_handler(int sig);
  62 static void             sigterm_handler(int sig);
  63 static long             select_timeout(int fds);
  64 static void             usage(int status) __attribute__((noreturn));
  65
  66
  67 /*
  68  * Local globals...
  69  */
  70
  71 static int              parent_signal = 0;
  72                                         /* Set to signal number from child */
  73 static int              holdcount = 0;  /* Number of times "hold" was called */
  74 #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
  75 static sigset_t         holdmask;       /* Old POSIX signal mask */
  76 #endif /* HAVE_SIGACTION && !HAVE_SIGSET */
  77 static int              dead_children = 0;
  78                                         /* Dead children? */
  79 static int              stop_scheduler = 0;
  80                                         /* Should the scheduler stop? */
  81
  82
  83 /*
  84  * 'main()' - Main entry for the CUPS scheduler.
  85  */
  86
  87 int                                     /* O - Exit status */
  88 main(int  argc,                         /* I - Number of command-line args */
  89      char *argv[])                      /* I - Command-line arguments */
  90 {
  91   int                   i;              /* Looping var */
  92   char                  *opt;           /* Option character */
  93   int                   fg;             /* Run in the foreground */
  94   int                   fds;            /* Number of ready descriptors */
  95   cupsd_client_t        *con;           /* Current client */
  96   cupsd_job_t           *job;           /* Current job */
  97   cupsd_listener_t      *lis;           /* Current listener */
  98   time_t                current_time,   /* Current time */
  99                         activity,       /* Client activity timer */
 100                         senddoc_time,   /* Send-Document time */
 101                         expire_time,    /* Subscription expire time */
 102                         report_time,    /* Malloc/client/job report time */
 103                         event_time;     /* Last event notification time */
 104   long                  timeout;        /* Timeout for cupsdDoSelect() */
 105   struct rlimit         limit;          /* Runtime limit */
 106 #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
 107   struct sigaction      action;         /* Actions for POSIX signals */
 108 #endif /* HAVE_SIGACTION && !HAVE_SIGSET */
 109   int                   run_as_child = 0;
 110                                         /* Needed for background fork/exec */
 111 #ifdef __APPLE__
 112   int                   use_sysman = !getuid();
 113                                         /* Use system management functions? */
 114 #else
 115   time_t                netif_time = 0; /* Time since last network update */
 116 #endif /* __APPLE__ */
 117 #if HAVE_LAUNCHD
 118   int                   launchd_idle_exit;
 119                                         /* Idle exit on select timeout? */
 120 #endif  /* HAVE_LAUNCHD */
 121
 122
 123 #ifdef HAVE_GETEUID
 124  /*
 125   * Check for setuid invocation, which we do not support!
 126   */
 127
 128   if (getuid() != geteuid())
 129   {
 130     fputs("cupsd: Cannot run as a setuid program\n", stderr);
 131     return (1);
 132   }
 133 #endif /* HAVE_GETEUID */
 134
 135  /*
 136   * Check for command-line arguments...
 137   */
 138
 139   fg = 0;
 140
 141 #ifdef HAVE_LAUNCHD
 142   if (getenv("CUPSD_LAUNCHD"))
 143   {
 144     Launchd = 1;
 145     fg      = 1;
 146   }
 147 #endif /* HAVE_LAUNCHD */
 148
 149   for (i = 1; i < argc; i ++)
 150     if (argv[i][0] == '-')
 151       for (opt = argv[i] + 1; *opt != '\0'; opt ++)
 152         switch (*opt)
 153         {
 154           case 'C' : /* Run as child with config file */
 155               run_as_child = 1;
 156               fg           = -1;
 157
 158           case 'c' : /* Configuration file */
 159               i ++;
 160               if (i >= argc)
 161               {
 162                 _cupsLangPuts(stderr, _("cupsd: Expected config filename "
 163                                         "after \"-c\" option."));
 164                 usage(1);
 165               }
 166
 167               if (argv[i][0] == '/')
 168               {
 169                /*
 170                 * Absolute directory...
 171                 */
 172
 173                 cupsdSetString(&ConfigurationFile, argv[i]);
 174               }
 175               else
 176               {
 177                /*
 178                 * Relative directory...
 179                 */
 180
 181                 char *current;          /* Current directory */
 182
 183                /*
 184                 * Allocate a buffer for the current working directory to
 185                 * reduce run-time stack usage; this approximates the
 186                 * behavior of some implementations of getcwd() when they
 187                 * are passed a NULL pointer.
 188                 */
 189
 190                 if ((current = malloc(1024)) == NULL)
 191                 {
 192                   _cupsLangPuts(stderr,
 193                                 _("cupsd: Unable to get current directory."));
 194                   return (1);
 195                 }
 196
 197                 if (!getcwd(current, 1024))
 198                 {
 199                   _cupsLangPuts(stderr,
 200                                 _("cupsd: Unable to get current directory."));
 201                   free(current);
 202                   return (1);
 203                 }
 204
 205                 cupsdSetStringf(&ConfigurationFile, "%s/%s", current, argv[i]);
 206                 free(current);
 207               }
 208               break;
 209
 210           case 'f' : /* Run in foreground... */
 211               fg = 1;
 212               break;
 213
 214           case 'F' : /* Run in foreground, but disconnect from terminal... */
 215               fg = -1;
 216               break;
 217
 218           case 'h' : /* Show usage/help */
 219               usage(0);
 220               break;
 221
 222           case 'l' : /* Started by launchd... */
 223 #ifdef HAVE_LAUNCHD
 224               Launchd = 1;
 225               fg      = 1;
 226 #else
 227               _cupsLangPuts(stderr, _("cupsd: launchd(8) support not compiled "
 228                                       "in, running in normal mode."));
 229               fg = 0;
 230 #endif /* HAVE_LAUNCHD */
 231               break;
 232
 233           case 'p' : /* Stop immediately for profiling */
 234               fputs("cupsd: -p (startup profiling) is for internal testing "
 235                     "use only!\n", stderr);
 236               stop_scheduler = 1;
 237               fg             = 1;
 238               break;
 239
 240           case 'P' : /* Disable security profiles */
 241               fputs("cupsd: -P (disable sandboxing) is for internal testing use only.\n", stderr);
 242               UseSandboxing = 0;
 243               break;
 244
 245           case 's' : /* Set cups-files.conf location */
 246               i ++;
 247               if (i >= argc)
 248               {
 249                 _cupsLangPuts(stderr, _("cupsd: Expected cups-files.conf "
 250                                         "filename after \"-s\" option."));
 251                 usage(1);
 252               }
 253
 254               if (argv[i][0] != '/')
 255               {
 256                /*
 257                 * Relative filename not allowed...
 258                 */
 259
 260                 _cupsLangPuts(stderr, _("cupsd: Relative cups-files.conf "
 261                                         "filename not allowed."));
 262                 usage(1);
 263               }
 264
 265               cupsdSetString(&CupsFilesFile, argv[i]);
 266               break;
 267
 268 #ifdef __APPLE__
 269           case 'S' : /* Disable system management functions */
 270               fputs("cupsd: -S (disable system management) for internal "
 271                     "testing use only!\n", stderr);
 272               use_sysman = 0;
 273               break;
 274 #endif /* __APPLE__ */
 275
 276           case 't' : /* Test the cupsd.conf file... */
 277               TestConfigFile = 1;
 278               fg             = 1;
 279               break;
 280
 281           default : /* Unknown option */
 282               _cupsLangPrintf(stderr, _("cupsd: Unknown option \"%c\" - "
 283                                         "aborting."), *opt);
 284               usage(1);
 285               break;
 286         }
 287     else
 288     {
 289       _cupsLangPrintf(stderr, _("cupsd: Unknown argument \"%s\" - aborting."),
 290                       argv[i]);
 291       usage(1);
 292     }
 293
 294   if (!ConfigurationFile)
 295     cupsdSetString(&ConfigurationFile, CUPS_SERVERROOT "/cupsd.conf");
 296
 297   if (!CupsFilesFile)
 298   {
 299     char        *filename,              /* Copy of cupsd.conf filename */
 300                 *slash;                 /* Final slash in cupsd.conf filename */
 301     size_t      len;                    /* Size of buffer */
 302
 303     len = strlen(ConfigurationFile) + 15;
 304     if ((filename = malloc(len)) == NULL)
 305     {
 306       _cupsLangPrintf(stderr,
 307                       _("cupsd: Unable to get path to "
 308                         "cups-files.conf file."));
 309       return (1);
 310     }
 311
 312     strlcpy(filename, ConfigurationFile, len);
 313     if ((slash = strrchr(filename, '/')) == NULL)
 314     {
 315       _cupsLangPrintf(stderr,
 316                       _("cupsd: Unable to get path to "
 317                         "cups-files.conf file."));
 318       return (1);
 319     }
 320
 321     strlcpy(slash, "/cups-files.conf", len - (size_t)(slash - filename));
 322     cupsdSetString(&CupsFilesFile, filename);
 323     free(filename);
 324   }
 325
 326  /*
 327   * If the user hasn't specified "-f", run in the background...
 328   */
 329
 330   if (!fg)
 331   {
 332    /*
 333     * Setup signal handlers for the parent...
 334     */
 335
 336 #ifdef HAVE_SIGSET /* Use System V signals over POSIX to avoid bugs */
 337     sigset(SIGUSR1, parent_handler);
 338     sigset(SIGCHLD, parent_handler);
 339
 340     sigset(SIGHUP, SIG_IGN);
 341 #elif defined(HAVE_SIGACTION)
 342     memset(&action, 0, sizeof(action));
 343     sigemptyset(&action.sa_mask);
 344     sigaddset(&action.sa_mask, SIGUSR1);
 345     action.sa_handler = parent_handler;
 346     sigaction(SIGUSR1, &action, NULL);
 347     sigaction(SIGCHLD, &action, NULL);
 348
 349     sigemptyset(&action.sa_mask);
 350     action.sa_handler = SIG_IGN;
 351     sigaction(SIGHUP, &action, NULL);
 352 #else
 353     signal(SIGUSR1, parent_handler);
 354     signal(SIGCLD, parent_handler);
 355
 356     signal(SIGHUP, SIG_IGN);
 357 #endif /* HAVE_SIGSET */
 358
 359     if (fork() > 0)
 360     {
 361      /*
 362       * OK, wait for the child to startup and send us SIGUSR1 or to crash
 363       * and the OS send us SIGCHLD...  We also need to ignore SIGHUP which
 364       * might be sent by the init script to restart the scheduler...
 365       */
 366
 367       for (; parent_signal == 0;)
 368         sleep(1);
 369
 370       if (parent_signal == SIGUSR1)
 371         return (0);
 372
 373       if (wait(&i) < 0)
 374       {
 375         perror("cupsd");
 376         return (1);
 377       }
 378       else if (WIFEXITED(i))
 379       {
 380         fprintf(stderr, "cupsd: Child exited with status %d\n",
 381                 WEXITSTATUS(i));
 382         return (2);
 383       }
 384       else
 385       {
 386         fprintf(stderr, "cupsd: Child exited on signal %d\n", WTERMSIG(i));
 387         return (3);
 388       }
 389     }
 390
 391 #if defined(__OpenBSD__) && OpenBSD < 201211
 392    /*
 393     * Call _thread_sys_closefrom() so the child process doesn't reset the
 394     * parent's file descriptors to be blocking.  This is a workaround for a
 395     * limitation of userland libpthread on older versions of OpenBSD.
 396     */
 397
 398     _thread_sys_closefrom(0);
 399 #endif /* __OpenBSD__ && OpenBSD < 201211 */
 400
 401    /*
 402     * Since CoreFoundation and DBUS both create fork-unsafe data on execution of
 403     * a program, and since this kind of really unfriendly behavior seems to be
 404     * more common these days in system libraries, we need to re-execute the
 405     * background cupsd with the "-C" option to avoid problems.  Unfortunately,
 406     * we also have to assume that argv[0] contains the name of the cupsd
 407     * executable - there is no portable way to get the real pathname...
 408     */
 409
 410     execlp(argv[0], argv[0], "-C", ConfigurationFile, (char *)0);
 411     exit(errno);
 412   }
 413
 414   if (fg < 1)
 415   {
 416    /*
 417     * Make sure we aren't tying up any filesystems...
 418     */
 419
 420     chdir("/");
 421
 422 #ifndef DEBUG
 423    /*
 424     * Disable core dumps...
 425     */
 426
 427     getrlimit(RLIMIT_CORE, &limit);
 428     limit.rlim_cur = 0;
 429     setrlimit(RLIMIT_CORE, &limit);
 430
 431    /*
 432     * Disconnect from the controlling terminal...
 433     */
 434
 435     setsid();
 436
 437    /*
 438     * Close all open files...
 439     */
 440
 441     getrlimit(RLIMIT_NOFILE, &limit);
 442
 443     for (i = 0; i < limit.rlim_cur && i < 1024; i ++)
 444       close(i);
 445
 446    /*
 447     * Redirect stdin/out/err to /dev/null...
 448     */
 449
 450     if ((i = open("/dev/null", O_RDONLY)) != 0)
 451     {
 452       dup2(i, 0);
 453       close(i);
 454     }
 455
 456     if ((i = open("/dev/null", O_WRONLY)) != 1)
 457     {
 458       dup2(i, 1);
 459       close(i);
 460     }
 461
 462     if ((i = open("/dev/null", O_WRONLY)) != 2)
 463     {
 464       dup2(i, 2);
 465       close(i);
 466     }
 467 #endif /* DEBUG */
 468   }
 469
 470  /*
 471   * Set the timezone info...
 472   */
 473
 474   tzset();
 475
 476 #ifdef LC_TIME
 477   setlocale(LC_TIME, "");
 478 #endif /* LC_TIME */
 479
 480 #ifdef HAVE_DBUS_THREADS_INIT
 481  /*
 482   * Enable threading support for D-BUS...
 483   */
 484
 485   dbus_threads_init();
 486 #endif /* HAVE_DBUS_THREADS_INIT */
 487
 488  /*
 489   * Set the maximum number of files...
 490   */
 491
 492   getrlimit(RLIMIT_NOFILE, &limit);
 493
 494 #if !defined(HAVE_POLL) && !defined(HAVE_EPOLL) && !defined(HAVE_KQUEUE)
 495   if (limit.rlim_max > FD_SETSIZE)
 496     MaxFDs = FD_SETSIZE;
 497   else
 498 #endif /* !HAVE_POLL && !HAVE_EPOLL && !HAVE_KQUEUE */
 499 #ifdef RLIM_INFINITY
 500   if (limit.rlim_max == RLIM_INFINITY)
 501     MaxFDs = 16384;
 502   else
 503 #endif /* RLIM_INFINITY */
 504     MaxFDs = limit.rlim_max;
 505
 506   limit.rlim_cur = (rlim_t)MaxFDs;
 507
 508   setrlimit(RLIMIT_NOFILE, &limit);
 509
 510   cupsdStartSelect();
 511
 512  /*
 513   * Read configuration...
 514   */
 515
 516   if (!cupsdReadConfiguration())
 517     return (1);
 518   else if (TestConfigFile)
 519   {
 520     printf("\"%s\" is OK.\n", CupsFilesFile);
 521     printf("\"%s\" is OK.\n", ConfigurationFile);
 522     return (0);
 523   }
 524
 525  /*
 526   * Clean out old temp files and printer cache data.
 527   */
 528
 529   if (!strncmp(TempDir, RequestRoot, strlen(RequestRoot)))
 530     cupsdCleanFiles(TempDir, NULL);
 531
 532   cupsdCleanFiles(CacheDir, "*.ipp");
 533
 534 #if HAVE_LAUNCHD
 535   if (Launchd)
 536   {
 537    /*
 538     * If we were started by launchd get the listen sockets file descriptors...
 539     */
 540
 541     launchd_checkin();
 542     launchd_checkout();
 543   }
 544 #endif /* HAVE_LAUNCHD */
 545
 546  /*
 547   * Startup the server...
 548   */
 549
 550   httpInitialize();
 551
 552   cupsdStartServer();
 553
 554  /*
 555   * Catch hangup and child signals and ignore broken pipes...
 556   */
 557
 558 #ifdef HAVE_SIGSET /* Use System V signals over POSIX to avoid bugs */
 559   sigset(SIGCHLD, sigchld_handler);
 560   sigset(SIGHUP, sighup_handler);
 561   sigset(SIGPIPE, SIG_IGN);
 562   sigset(SIGTERM, sigterm_handler);
 563 #elif defined(HAVE_SIGACTION)
 564   memset(&action, 0, sizeof(action));
 565
 566   sigemptyset(&action.sa_mask);
 567   sigaddset(&action.sa_mask, SIGTERM);
 568   sigaddset(&action.sa_mask, SIGCHLD);
 569   action.sa_handler = sigchld_handler;
 570   sigaction(SIGCHLD, &action, NULL);
 571
 572   sigemptyset(&action.sa_mask);
 573   sigaddset(&action.sa_mask, SIGHUP);
 574   action.sa_handler = sighup_handler;
 575   sigaction(SIGHUP, &action, NULL);
 576
 577   sigemptyset(&action.sa_mask);
 578   action.sa_handler = SIG_IGN;
 579   sigaction(SIGPIPE, &action, NULL);
 580
 581   sigemptyset(&action.sa_mask);
 582   sigaddset(&action.sa_mask, SIGTERM);
 583   sigaddset(&action.sa_mask, SIGCHLD);
 584   action.sa_handler = sigterm_handler;
 585   sigaction(SIGTERM, &action, NULL);
 586 #else
 587   signal(SIGCLD, sigchld_handler);      /* No, SIGCLD isn't a typo... */
 588   signal(SIGHUP, sighup_handler);
 589   signal(SIGPIPE, SIG_IGN);
 590   signal(SIGTERM, sigterm_handler);
 591 #endif /* HAVE_SIGSET */
 592
 593  /*
 594   * Initialize authentication certificates...
 595   */
 596
 597   cupsdInitCerts();
 598
 599  /*
 600   * If we are running in the background, signal the parent process that
 601   * we are up and running...
 602   */
 603
 604   if (!fg || run_as_child)
 605   {
 606    /*
 607     * Send a signal to the parent process, but only if the parent is
 608     * not PID 1 (init).  This avoids accidentally shutting down the
 609     * system on OpenBSD if you CTRL-C the server before it is up...
 610     */
 611
 612     i = getppid();      /* Save parent PID to avoid race condition */
 613
 614     if (i != 1)
 615       kill(i, SIGUSR1);
 616   }
 617
 618 #ifdef __APPLE__
 619  /*
 620   * Start power management framework...
 621   */
 622
 623   if (use_sysman)
 624     cupsdStartSystemMonitor();
 625 #endif /* __APPLE__ */
 626
 627  /*
 628   * Send server-started event...
 629   */
 630
 631 #ifdef HAVE_LAUNCHD
 632   if (Launchd)
 633     cupsdAddEvent(CUPSD_EVENT_SERVER_STARTED, NULL, NULL,
 634                   "Scheduler started via launchd.");
 635   else
 636 #endif /* HAVE_LAUNCHD */
 637   if (fg)
 638     cupsdAddEvent(CUPSD_EVENT_SERVER_STARTED, NULL, NULL,
 639                   "Scheduler started in foreground.");
 640   else
 641     cupsdAddEvent(CUPSD_EVENT_SERVER_STARTED, NULL, NULL,
 642                   "Scheduler started in background.");
 643
 644  /*
 645   * Start any pending print jobs...
 646   */
 647
 648   cupsdCheckJobs();
 649
 650  /*
 651   * Loop forever...
 652   */
 653
 654   current_time  = time(NULL);
 655   event_time    = current_time;
 656   expire_time   = current_time;
 657   fds           = 1;
 658   report_time   = 0;
 659   senddoc_time  = current_time;
 660
 661   while (!stop_scheduler)
 662   {
 663    /*
 664     * Check if there are dead children to handle...
 665     */
 666
 667     if (dead_children)
 668       process_children();
 669
 670    /*
 671     * Check if we need to load the server configuration file...
 672     */
 673
 674     if (NeedReload)
 675     {
 676      /*
 677       * Close any idle clients...
 678       */
 679
 680       if (cupsArrayCount(Clients) > 0)
 681       {
 682         for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
 683              con;
 684              con = (cupsd_client_t *)cupsArrayNext(Clients))
 685           if (httpGetState(con->http) == HTTP_WAITING)
 686             cupsdCloseClient(con);
 687           else
 688             con->http->keep_alive = HTTP_KEEPALIVE_OFF;
 689
 690         cupsdPauseListening();
 691       }
 692
 693      /*
 694       * Restart if all clients are closed and all jobs finished, or
 695       * if the reload timeout has elapsed...
 696       */
 697
 698       if ((cupsArrayCount(Clients) == 0 &&
 699            (cupsArrayCount(PrintingJobs) == 0 || NeedReload != RELOAD_ALL)) ||
 700           (time(NULL) - ReloadTime) >= ReloadTimeout)
 701       {
 702        /*
 703         * Shutdown the server...
 704         */
 705
 706         DoingShutdown = 1;
 707
 708         cupsdStopServer();
 709
 710        /*
 711         * Read configuration...
 712         */
 713
 714         if (!cupsdReadConfiguration())
 715         {
 716           syslog(LOG_LPR, "Unable to read configuration file \'%s\' - exiting!",
 717                  ConfigurationFile);
 718           break;
 719         }
 720
 721 #if HAVE_LAUNCHD
 722         if (Launchd)
 723         {
 724          /*
 725           * If we were started by launchd, get the listen socket file
 726           * descriptors...
 727           */
 728
 729           launchd_checkin();
 730           launchd_checkout();
 731         }
 732 #endif /* HAVE_LAUNCHD */
 733
 734        /*
 735         * Startup the server...
 736         */
 737
 738         DoingShutdown = 0;
 739
 740         cupsdStartServer();
 741
 742        /*
 743         * Send a server-restarted event...
 744         */
 745
 746         cupsdAddEvent(CUPSD_EVENT_SERVER_RESTARTED, NULL, NULL,
 747                       "Scheduler restarted.");
 748       }
 749     }
 750
 751    /*
 752     * Check for available input or ready output.  If cupsdDoSelect()
 753     * returns 0 or -1, something bad happened and we should exit
 754     * immediately.
 755     *
 756     * Note that we at least have one listening socket open at all
 757     * times.
 758     */
 759
 760     if ((timeout = select_timeout(fds)) > 1 && LastEvent)
 761       timeout = 1;
 762
 763 #if HAVE_LAUNCHD
 764    /*
 765     * If no other work is scheduled and we're being controlled by
 766     * launchd then timeout after 'LaunchdTimeout' seconds of
 767     * inactivity...
 768     */
 769
 770     if (timeout == 86400 && Launchd && LaunchdTimeout &&
 771         !cupsArrayCount(ActiveJobs) &&
 772         (!Browsing || !BrowseLocalProtocols || !cupsArrayCount(Printers)))
 773     {
 774       timeout           = LaunchdTimeout;
 775       launchd_idle_exit = 1;
 776     }
 777     else
 778       launchd_idle_exit = 0;
 779 #endif  /* HAVE_LAUNCHD */
 780
 781     if ((fds = cupsdDoSelect(timeout)) < 0)
 782     {
 783      /*
 784       * Got an error from select!
 785       */
 786
 787 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
 788       cupsd_printer_t   *p;             /* Current printer */
 789 #endif /* HAVE_DNSSD || HAVE_AVAHI */
 790
 791
 792       if (errno == EINTR)               /* Just interrupted by a signal */
 793         continue;
 794
 795      /*
 796       * Log all sorts of debug info to help track down the problem.
 797       */
 798
 799       cupsdLogMessage(CUPSD_LOG_EMERG, "cupsdDoSelect() failed - %s!",
 800                       strerror(errno));
 801
 802       for (i = 0, con = (cupsd_client_t *)cupsArrayFirst(Clients);
 803            con;
 804            i ++, con = (cupsd_client_t *)cupsArrayNext(Clients))
 805         cupsdLogMessage(CUPSD_LOG_EMERG,
 806                         "Clients[%d] = %d, file = %d, state = %d",
 807                         i, con->number, con->file, httpGetState(con->http));
 808
 809       for (i = 0, lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
 810            lis;
 811            i ++, lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
 812         cupsdLogMessage(CUPSD_LOG_EMERG, "Listeners[%d] = %d", i, lis->fd);
 813
 814       cupsdLogMessage(CUPSD_LOG_EMERG, "CGIPipes[0] = %d", CGIPipes[0]);
 815
 816 #ifdef __APPLE__
 817       cupsdLogMessage(CUPSD_LOG_EMERG, "SysEventPipes[0] = %d",
 818                       SysEventPipes[0]);
 819 #endif /* __APPLE__ */
 820
 821       for (job = (cupsd_job_t *)cupsArrayFirst(ActiveJobs);
 822            job;
 823            job = (cupsd_job_t *)cupsArrayNext(ActiveJobs))
 824         cupsdLogMessage(CUPSD_LOG_EMERG, "Jobs[%d] = %d < [%d %d] > [%d %d]",
 825                         job->id,
 826                         job->status_buffer ? job->status_buffer->fd : -1,
 827                         job->print_pipes[0], job->print_pipes[1],
 828                         job->back_pipes[0], job->back_pipes[1]);
 829
 830 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
 831       for (p = (cupsd_printer_t *)cupsArrayFirst(Printers);
 832            p;
 833            p = (cupsd_printer_t *)cupsArrayNext(Printers))
 834         cupsdLogMessage(CUPSD_LOG_EMERG, "printer[%s] reg_name=\"%s\"", p->name,
 835                         p->reg_name ? p->reg_name : "(null)");
 836 #endif /* HAVE_DNSSD || HAVE_AVAHI */
 837
 838       break;
 839     }
 840
 841     current_time = time(NULL);
 842
 843    /*
 844     * Write dirty config/state files...
 845     */
 846
 847     if (DirtyCleanTime && current_time >= DirtyCleanTime)
 848       cupsdCleanDirty();
 849
 850 #ifdef __APPLE__
 851    /*
 852     * If we are going to sleep and still have pending jobs, stop them after
 853     * a period of time...
 854     */
 855
 856     if (SleepJobs > 0 && current_time >= SleepJobs &&
 857         cupsArrayCount(PrintingJobs) > 0)
 858     {
 859       SleepJobs = 0;
 860       cupsdStopAllJobs(CUPSD_JOB_DEFAULT, 5);
 861     }
 862 #endif /* __APPLE__ */
 863
 864 #ifndef __APPLE__
 865    /*
 866     * Update the network interfaces once a minute...
 867     */
 868
 869     if ((current_time - netif_time) >= 60)
 870     {
 871       netif_time  = current_time;
 872       NetIFUpdate = 1;
 873     }
 874 #endif /* !__APPLE__ */
 875
 876 #if HAVE_LAUNCHD
 877    /*
 878     * If no other work was scheduled and we're being controlled by launchd
 879     * then timeout after 'LaunchdTimeout' seconds of inactivity...
 880     */
 881
 882     if (!fds && launchd_idle_exit)
 883     {
 884       cupsdLogMessage(CUPSD_LOG_INFO,
 885                       "Printer sharing is off and there are no jobs pending, "
 886                       "will restart on demand.");
 887       stop_scheduler = 1;
 888       break;
 889     }
 890 #endif /* HAVE_LAUNCHD */
 891
 892    /*
 893     * Resume listening for new connections as needed...
 894     */
 895
 896     if (ListeningPaused && ListeningPaused <= current_time &&
 897         cupsArrayCount(Clients) < MaxClients)
 898       cupsdResumeListening();
 899
 900    /*
 901     * Expire subscriptions and unload completed jobs as needed...
 902     */
 903
 904     if (current_time > expire_time)
 905     {
 906       if (cupsArrayCount(Subscriptions) > 0)
 907         cupsdExpireSubscriptions(NULL, NULL);
 908
 909       cupsdUnloadCompletedJobs();
 910
 911       expire_time = current_time;
 912     }
 913
 914 #ifndef HAVE_AUTHORIZATION_H
 915    /*
 916     * Update the root certificate once every 5 minutes if we have client
 917     * connections...
 918     */
 919
 920     if ((current_time - RootCertTime) >= RootCertDuration && RootCertDuration &&
 921         !RunUser && cupsArrayCount(Clients))
 922     {
 923      /*
 924       * Update the root certificate...
 925       */
 926
 927       cupsdDeleteCert(0);
 928       cupsdAddCert(0, "root", cupsdDefaultAuthType());
 929     }
 930 #endif /* !HAVE_AUTHORIZATION_H */
 931
 932    /*
 933     * Check for new data on the client sockets...
 934     */
 935
 936     for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
 937          con;
 938          con = (cupsd_client_t *)cupsArrayNext(Clients))
 939     {
 940      /*
 941       * Process pending data in the input buffer...
 942       */
 943
 944       // TODO: Use httpGetReady()
 945       if (con->http->used)
 946       {
 947         cupsdReadClient(con);
 948         continue;
 949       }
 950
 951      /*
 952       * Check the activity and close old clients...
 953       */
 954
 955       // TODO: Use httpGetActivity()
 956       activity = current_time - Timeout;
 957       if (con->http->activity < activity && !con->pipe_pid)
 958       {
 959         cupsdLogMessage(CUPSD_LOG_DEBUG,
 960                         "Closing client %d after %d seconds of inactivity...",
 961                         con->number, Timeout);
 962
 963         cupsdCloseClient(con);
 964         continue;
 965       }
 966     }
 967
 968    /*
 969     * Update any pending multi-file documents...
 970     */
 971
 972     if ((current_time - senddoc_time) >= 10)
 973     {
 974       cupsdCheckJobs();
 975       senddoc_time = current_time;
 976     }
 977
 978    /*
 979     * Clean job history...
 980     */
 981
 982     if (JobHistoryUpdate && current_time >= JobHistoryUpdate)
 983       cupsdCleanJobs();
 984
 985    /*
 986     * Log statistics at most once a minute when in debug mode...
 987     */
 988
 989     if ((current_time - report_time) >= 60 && LogLevel >= CUPSD_LOG_DEBUG)
 990     {
 991       size_t            string_count,   /* String count */
 992                         alloc_bytes,    /* Allocated string bytes */
 993                         total_bytes;    /* Total string bytes */
 994 #ifdef HAVE_MALLINFO
 995       struct mallinfo   mem;            /* Malloc information */
 996
 997
 998       mem = mallinfo();
 999       cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: malloc-arena=%lu", mem.arena);
1000       cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: malloc-used=%lu",
1001                       mem.usmblks + mem.uordblks);
1002       cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: malloc-free=%lu",
1003                       mem.fsmblks + mem.fordblks);
1004 #endif /* HAVE_MALLINFO */
1005
1006       cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: clients=%d",
1007                       cupsArrayCount(Clients));
1008       cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: jobs=%d",
1009                       cupsArrayCount(Jobs));
1010       cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: jobs-active=%d",
1011                       cupsArrayCount(ActiveJobs));
1012       cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: printers=%d",
1013                       cupsArrayCount(Printers));
1014
1015       string_count = _cupsStrStatistics(&alloc_bytes, &total_bytes);
1016       cupsdLogMessage(CUPSD_LOG_DEBUG,
1017                       "Report: stringpool-string-count=" CUPS_LLFMT,
1018                       CUPS_LLCAST string_count);
1019       cupsdLogMessage(CUPSD_LOG_DEBUG,
1020                       "Report: stringpool-alloc-bytes=" CUPS_LLFMT,
1021                       CUPS_LLCAST alloc_bytes);
1022       cupsdLogMessage(CUPSD_LOG_DEBUG,
1023                       "Report: stringpool-total-bytes=" CUPS_LLFMT,
1024                       CUPS_LLCAST total_bytes);
1025
1026       report_time = current_time;
1027     }
1028
1029    /*
1030     * Handle OS-specific event notification for any events that have
1031     * accumulated.  Don't send these more than once a second...
1032     */
1033
1034     if (LastEvent && (current_time - event_time) >= 1)
1035     {
1036 #ifdef HAVE_NOTIFY_POST
1037       if (LastEvent & (CUPSD_EVENT_PRINTER_ADDED |
1038                        CUPSD_EVENT_PRINTER_DELETED |
1039                        CUPSD_EVENT_PRINTER_MODIFIED))
1040       {
1041         cupsdLogMessage(CUPSD_LOG_DEBUG2,
1042                         "notify_post(\"com.apple.printerListChange\")");
1043         notify_post("com.apple.printerListChange");
1044       }
1045
1046       if (LastEvent & CUPSD_EVENT_PRINTER_STATE_CHANGED)
1047       {
1048         cupsdLogMessage(CUPSD_LOG_DEBUG2,
1049                         "notify_post(\"com.apple.printerHistoryChange\")");
1050         notify_post("com.apple.printerHistoryChange");
1051       }
1052
1053       if (LastEvent & (CUPSD_EVENT_JOB_STATE_CHANGED |
1054                        CUPSD_EVENT_JOB_CONFIG_CHANGED |
1055                        CUPSD_EVENT_JOB_PROGRESS))
1056       {
1057         cupsdLogMessage(CUPSD_LOG_DEBUG2,
1058                         "notify_post(\"com.apple.jobChange\")");
1059         notify_post("com.apple.jobChange");
1060       }
1061 #endif /* HAVE_NOTIFY_POST */
1062
1063      /*
1064       * Reset the accumulated events...
1065       */
1066
1067       LastEvent  = CUPSD_EVENT_NONE;
1068       event_time = current_time;
1069     }
1070   }
1071
1072  /*
1073   * Log a message based on what happened...
1074   */
1075
1076   if (stop_scheduler)
1077   {
1078     cupsdLogMessage(CUPSD_LOG_INFO, "Scheduler shutting down normally.");
1079     cupsdAddEvent(CUPSD_EVENT_SERVER_STOPPED, NULL, NULL,
1080                   "Scheduler shutting down normally.");
1081   }
1082   else
1083   {
1084     cupsdLogMessage(CUPSD_LOG_ERROR,
1085                     "Scheduler shutting down due to program error.");
1086     cupsdAddEvent(CUPSD_EVENT_SERVER_STOPPED, NULL, NULL,
1087                   "Scheduler shutting down due to program error.");
1088   }
1089
1090  /*
1091   * Close all network clients...
1092   */
1093
1094   DoingShutdown = 1;
1095
1096   cupsdStopServer();
1097
1098 #ifdef HAVE_LAUNCHD
1099  /*
1100   * Update the launchd KeepAlive file as needed...
1101   */
1102
1103   if (Launchd)
1104     launchd_checkout();
1105 #endif /* HAVE_LAUNCHD */
1106
1107  /*
1108   * Stop all jobs...
1109   */
1110
1111   cupsdFreeAllJobs();
1112
1113 #ifdef __APPLE__
1114  /*
1115   * Stop monitoring system event monitoring...
1116   */
1117
1118   if (use_sysman)
1119     cupsdStopSystemMonitor();
1120 #endif /* __APPLE__ */
1121
1122   cupsdStopSelect();
1123
1124   return (!stop_scheduler);
1125 }
1126
1127
1128 /*
1129  * 'cupsdAddString()' - Copy and add a string to an array.
1130  */
1131
1132 int                                     /* O  - 1 on success, 0 on failure */
1133 cupsdAddString(cups_array_t **a,        /* IO - String array */
1134                const char   *s)         /* I  - String to copy and add */
1135 {
1136   if (!*a)
1137     *a = cupsArrayNew3((cups_array_func_t)strcmp, NULL,
1138                        (cups_ahash_func_t)NULL, 0,
1139                        (cups_acopy_func_t)_cupsStrAlloc,
1140                        (cups_afree_func_t)_cupsStrFree);
1141
1142   return (cupsArrayAdd(*a, (char *)s));
1143 }
1144
1145
1146 /*
1147  * 'cupsdCheckProcess()' - Tell the main loop to check for dead children.
1148  */
1149
1150 void
1151 cupsdCheckProcess(void)
1152 {
1153  /*
1154   * Flag that we have dead children...
1155   */
1156
1157   dead_children = 1;
1158 }
1159
1160
1161 /*
1162  * 'cupsdClearString()' - Clear a string.
1163  */
1164
1165 void
1166 cupsdClearString(char **s)              /* O - String value */
1167 {
1168   if (s && *s)
1169   {
1170     _cupsStrFree(*s);
1171     *s = NULL;
1172   }
1173 }
1174
1175
1176 /*
1177  * 'cupsdFreeStrings()' - Free an array of strings.
1178  */
1179
1180 void
1181 cupsdFreeStrings(cups_array_t **a)      /* IO - String array */
1182 {
1183   if (*a)
1184   {
1185     cupsArrayDelete(*a);
1186     *a = NULL;
1187   }
1188 }
1189
1190
1191 /*
1192  * 'cupsdHoldSignals()' - Hold child and termination signals.
1193  */
1194
1195 void
1196 cupsdHoldSignals(void)
1197 {
1198 #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
1199   sigset_t              newmask;        /* New POSIX signal mask */
1200 #endif /* HAVE_SIGACTION && !HAVE_SIGSET */
1201
1202
1203   holdcount ++;
1204   if (holdcount > 1)
1205     return;
1206
1207 #ifdef HAVE_SIGSET
1208   sighold(SIGTERM);
1209   sighold(SIGCHLD);
1210 #elif defined(HAVE_SIGACTION)
1211   sigemptyset(&newmask);
1212   sigaddset(&newmask, SIGTERM);
1213   sigaddset(&newmask, SIGCHLD);
1214   sigprocmask(SIG_BLOCK, &newmask, &holdmask);
1215 #endif /* HAVE_SIGSET */
1216 }
1217
1218
1219 /*
1220  * 'cupsdReleaseSignals()' - Release signals for delivery.
1221  */
1222
1223 void
1224 cupsdReleaseSignals(void)
1225 {
1226   holdcount --;
1227   if (holdcount > 0)
1228     return;
1229
1230 #ifdef HAVE_SIGSET
1231   sigrelse(SIGTERM);
1232   sigrelse(SIGCHLD);
1233 #elif defined(HAVE_SIGACTION)
1234   sigprocmask(SIG_SETMASK, &holdmask, NULL);
1235 #endif /* HAVE_SIGSET */
1236 }
1237
1238
1239 /*
1240  * 'cupsdSetString()' - Set a string value.
1241  */
1242
1243 void
1244 cupsdSetString(char       **s,          /* O - New string */
1245                const char *v)           /* I - String value */
1246 {
1247   if (!s || *s == v)
1248     return;
1249
1250   if (*s)
1251     _cupsStrFree(*s);
1252
1253   if (v)
1254     *s = _cupsStrAlloc(v);
1255   else
1256     *s = NULL;
1257 }
1258
1259
1260 /*
1261  * 'cupsdSetStringf()' - Set a formatted string value.
1262  */
1263
1264 void
1265 cupsdSetStringf(char       **s,         /* O - New string */
1266                 const char *f,          /* I - Printf-style format string */
1267                 ...)                    /* I - Additional args as needed */
1268 {
1269   char          v[65536 + 64];          /* Formatting string value */
1270   va_list       ap;                     /* Argument pointer */
1271   char          *olds;                  /* Old string */
1272
1273
1274   if (!s)
1275     return;
1276
1277   olds = *s;
1278
1279   if (f)
1280   {
1281     va_start(ap, f);
1282     vsnprintf(v, sizeof(v), f, ap);
1283     va_end(ap);
1284
1285     *s = _cupsStrAlloc(v);
1286   }
1287   else
1288     *s = NULL;
1289
1290   if (olds)
1291     _cupsStrFree(olds);
1292 }
1293
1294
1295 #ifdef HAVE_LAUNCHD
1296 /*
1297  * 'launchd_checkin()' - Check-in with launchd and collect the listening fds.
1298  */
1299
1300 static void
1301 launchd_checkin(void)
1302 {
1303 #  ifdef HAVE_LAUNCH_ACTIVATE_SOCKET
1304   int                   error;          /* Check-in error, if any */
1305   size_t                i,              /* Looping var */
1306                         count;          /* Number of listeners */
1307   int                   *ld_sockets;    /* Listener sockets */
1308   cupsd_listener_t      *lis;           /* Listeners array */
1309   http_addr_t           addr;           /* Address variable */
1310   socklen_t             addrlen;        /* Length of address */
1311   char                  s[256];         /* String addresss */
1312
1313
1314   cupsdLogMessage(CUPSD_LOG_DEBUG, "launchd_checkin: pid=%d", (int)getpid());
1315
1316  /*
1317   * Check-in with launchd...
1318   */
1319
1320   if ((error = launch_activate_socket("Listeners", &ld_sockets, &count)) != 0)
1321   {
1322     cupsdLogMessage(CUPSD_LOG_ERROR, "launchd_checkin: Unable to get listener sockets: %s", strerror(error));
1323     exit(EXIT_FAILURE);
1324     return; /* anti-compiler-warning */
1325   }
1326
1327  /*
1328   * Try to match the launchd sockets to the cupsd listeners...
1329   */
1330
1331   cupsdLogMessage(CUPSD_LOG_DEBUG, "launchd_checkin: %d listeners.", (int)count);
1332
1333   for (i = 0; i < count; i ++)
1334   {
1335    /*
1336     * Get the launchd socket address...
1337     */
1338
1339     addrlen = sizeof(addr);
1340
1341     if (getsockname(ld_sockets[i], (struct sockaddr *)&addr, &addrlen))
1342     {
1343       cupsdLogMessage(CUPSD_LOG_ERROR, "launchd_checkin: Unable to get local address for listener #%d: %s", (int)i + 1, strerror(errno));
1344       continue;
1345     }
1346
1347     cupsdLogMessage(CUPSD_LOG_DEBUG, "launchd_checkin: Listener #%d at fd %d, \"%s\".", (int)i + 1, ld_sockets[i], httpAddrString(&addr, s, sizeof(s)));
1348
1349     for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
1350          lis;
1351          lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
1352       if (httpAddrEqual(&lis->address, &addr))
1353         break;
1354
1355    /*
1356     * Add a new listener if there's no match...
1357     */
1358
1359     if (lis)
1360     {
1361       cupsdLogMessage(CUPSD_LOG_DEBUG, "launchd_checkin: Matched existing listener #%d to %s.", (int)i + 1, httpAddrString(&(lis->address), s, sizeof(s)));
1362     }
1363     else
1364     {
1365       cupsdLogMessage(CUPSD_LOG_DEBUG, "launchd_checkin: Adding new listener #%d for %s.", (int)i + 1, httpAddrString(&addr, s, sizeof(s)));
1366
1367       if ((lis = calloc(1, sizeof(cupsd_listener_t))) == NULL)
1368       {
1369         cupsdLogMessage(CUPSD_LOG_ERROR, "launchd_checkin: Unable to allocate listener: %s", strerror(errno));
1370         exit(EXIT_FAILURE);
1371       }
1372
1373       cupsArrayAdd(Listeners, lis);
1374
1375       memcpy(&lis->address, &addr, sizeof(lis->address));
1376     }
1377
1378     lis->fd = ld_sockets[i];
1379
1380 #    ifdef HAVE_SSL
1381     if (httpAddrPort(&(lis->address)) == 443)
1382       lis->encryption = HTTP_ENCRYPT_ALWAYS;
1383 #    endif /* HAVE_SSL */
1384   }
1385
1386 #  else
1387   size_t                i,              /* Looping var */
1388                         count;          /* Number of listeners */
1389   launch_data_t         ld_msg,         /* Launch data message */
1390                         ld_resp,        /* Launch data response */
1391                         ld_array,       /* Launch data array */
1392                         ld_sockets,     /* Launch data sockets dictionary */
1393                         tmp;            /* Launch data */
1394   cupsd_listener_t      *lis;           /* Listeners array */
1395   http_addr_t           addr;           /* Address variable */
1396   socklen_t             addrlen;        /* Length of address */
1397   int                   fd;             /* File descriptor */
1398   char                  s[256];         /* String addresss */
1399
1400
1401   cupsdLogMessage(CUPSD_LOG_DEBUG, "launchd_checkin: pid=%d", (int)getpid());
1402
1403  /*
1404   * Check-in with launchd...
1405   */
1406
1407   ld_msg = launch_data_new_string(LAUNCH_KEY_CHECKIN);
1408   if ((ld_resp = launch_msg(ld_msg)) == NULL)
1409   {
1410     cupsdLogMessage(CUPSD_LOG_ERROR,
1411                     "launchd_checkin: launch_msg(\"" LAUNCH_KEY_CHECKIN
1412                     "\") IPC failure");
1413     exit(EXIT_FAILURE);
1414     return; /* anti-compiler-warning */
1415   }
1416
1417   if (launch_data_get_type(ld_resp) == LAUNCH_DATA_ERRNO)
1418   {
1419     errno = launch_data_get_errno(ld_resp);
1420     cupsdLogMessage(CUPSD_LOG_ERROR, "launchd_checkin: Check-in failed: %s",
1421                     strerror(errno));
1422     exit(EXIT_FAILURE);
1423     return; /* anti-compiler-warning */
1424   }
1425
1426  /*
1427   * Get the sockets dictionary...
1428   */
1429
1430   if ((ld_sockets = launch_data_dict_lookup(ld_resp, LAUNCH_JOBKEY_SOCKETS))
1431           == NULL)
1432   {
1433     cupsdLogMessage(CUPSD_LOG_ERROR,
1434                     "launchd_checkin: No sockets found to answer requests on.");
1435     exit(EXIT_FAILURE);
1436     return; /* anti-compiler-warning */
1437   }
1438
1439  /*
1440   * Get the array of listener sockets...
1441   */
1442
1443   if ((ld_array = launch_data_dict_lookup(ld_sockets, "Listeners")) == NULL)
1444   {
1445     cupsdLogMessage(CUPSD_LOG_ERROR,
1446                     "launchd_checkin: No sockets found to answer requests on.");
1447     exit(EXIT_FAILURE);
1448     return; /* anti-compiler-warning */
1449   }
1450
1451  /*
1452   * Add listening fd(s) to the Listener array...
1453   */
1454
1455   if (launch_data_get_type(ld_array) == LAUNCH_DATA_ARRAY)
1456   {
1457     count = launch_data_array_get_count(ld_array);
1458
1459     cupsdLogMessage(CUPSD_LOG_DEBUG, "launchd_checkin: %d listeners.", (int)count);
1460
1461     for (i = 0; i < count; i ++)
1462     {
1463      /*
1464       * Get the launchd file descriptor and address...
1465       */
1466
1467       if ((tmp = launch_data_array_get_index(ld_array, i)) != NULL)
1468       {
1469         fd      = launch_data_get_fd(tmp);
1470         addrlen = sizeof(addr);
1471
1472         if (getsockname(fd, (struct sockaddr *)&addr, &addrlen))
1473         {
1474           cupsdLogMessage(CUPSD_LOG_ERROR, "launchd_checkin: Unable to get local address for listener #%d: %s", (int)i + 1, strerror(errno));
1475           continue;
1476         }
1477
1478         cupsdLogMessage(CUPSD_LOG_DEBUG, "launchd_checkin: Listener #%d at fd %d, \"%s\".", (int)i + 1, fd, httpAddrString(&addr, s, sizeof(s)));
1479
1480        /*
1481         * Try to match the launchd socket address to one of the listeners...
1482         */
1483
1484         for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
1485              lis;
1486              lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
1487           if (httpAddrEqual(&lis->address, &addr))
1488             break;
1489
1490        /*
1491         * Add a new listener If there's no match...
1492         */
1493
1494         if (lis)
1495         {
1496           cupsdLogMessage(CUPSD_LOG_DEBUG, "launchd_checkin: Matched existing listener #%d to %s.", (int)i + 1, httpAddrString(&(lis->address), s, sizeof(s)));
1497         }
1498         else
1499         {
1500           cupsdLogMessage(CUPSD_LOG_DEBUG, "launchd_checkin: Adding new listener #%d for %s.", (int)i + 1, httpAddrString(&addr, s, sizeof(s)));
1501
1502           if ((lis = calloc(1, sizeof(cupsd_listener_t))) == NULL)
1503           {
1504             cupsdLogMessage(CUPSD_LOG_ERROR, "launchd_checkin: Unable to allocate listener: %s.", strerror(errno));
1505             exit(EXIT_FAILURE);
1506           }
1507
1508           cupsArrayAdd(Listeners, lis);
1509
1510           memcpy(&lis->address, &addr, sizeof(lis->address));
1511         }
1512
1513         lis->fd = fd;
1514
1515 #    ifdef HAVE_SSL
1516         if (httpAddrPort(&(lis->address)) == 443)
1517           lis->encryption = HTTP_ENCRYPT_ALWAYS;
1518 #    endif /* HAVE_SSL */
1519       }
1520     }
1521   }
1522
1523   launch_data_free(ld_msg);
1524   launch_data_free(ld_resp);
1525 #  endif /* HAVE_LAUNCH_ACTIVATE_SOCKET */
1526 }
1527
1528
1529 /*
1530  * 'launchd_checkout()' - Update the launchd KeepAlive file as needed.
1531  */
1532
1533 static void
1534 launchd_checkout(void)
1535 {
1536   int   fd;                             /* File descriptor */
1537
1538
1539  /*
1540   * Create or remove the launchd KeepAlive file based on whether
1541   * there are active jobs, polling, browsing for remote printers or
1542   * shared printers to advertise...
1543   */
1544
1545   if (cupsArrayCount(ActiveJobs) ||
1546       (Browsing && BrowseLocalProtocols && cupsArrayCount(Printers)))
1547   {
1548     cupsdLogMessage(CUPSD_LOG_DEBUG,
1549                     "Creating launchd keepalive file \"" CUPS_KEEPALIVE
1550                     "\"...");
1551
1552     if ((fd = open(CUPS_KEEPALIVE, O_RDONLY | O_CREAT | O_EXCL, S_IRUSR)) >= 0)
1553       close(fd);
1554   }
1555   else
1556   {
1557     cupsdLogMessage(CUPSD_LOG_DEBUG,
1558                     "Removing launchd keepalive file \"" CUPS_KEEPALIVE
1559                     "\"...");
1560
1561     unlink(CUPS_KEEPALIVE);
1562   }
1563 }
1564 #endif /* HAVE_LAUNCHD */
1565
1566
1567 /*
1568  * 'parent_handler()' - Catch USR1/CHLD signals...
1569  */
1570
1571 static void
1572 parent_handler(int sig)                 /* I - Signal */
1573 {
1574  /*
1575   * Store the signal we got from the OS and return...
1576   */
1577
1578   parent_signal = sig;
1579 }
1580
1581
1582 /*
1583  * 'process_children()' - Process all dead children...
1584  */
1585
1586 static void
1587 process_children(void)
1588 {
1589   int           status;                 /* Exit status of child */
1590   int           pid,                    /* Process ID of child */
1591                 job_id;                 /* Job ID of child */
1592   cupsd_job_t   *job;                   /* Current job */
1593   int           i;                      /* Looping var */
1594   char          name[1024];             /* Process name */
1595   const char    *type;                  /* Type of program */
1596
1597
1598   cupsdLogMessage(CUPSD_LOG_DEBUG2, "process_children()");
1599
1600  /*
1601   * Reset the dead_children flag...
1602   */
1603
1604   dead_children = 0;
1605
1606  /*
1607   * Collect the exit status of some children...
1608   */
1609
1610 #ifdef HAVE_WAITPID
1611   while ((pid = waitpid(-1, &status, WNOHANG)) > 0)
1612 #elif defined(HAVE_WAIT3)
1613   while ((pid = wait3(&status, WNOHANG, NULL)) > 0)
1614 #else
1615   if ((pid = wait(&status)) > 0)
1616 #endif /* HAVE_WAITPID */
1617   {
1618    /*
1619     * Collect the name of the process that finished...
1620     */
1621
1622     cupsdFinishProcess(pid, name, sizeof(name), &job_id);
1623
1624    /*
1625     * Delete certificates for CGI processes...
1626     */
1627
1628     if (pid)
1629       cupsdDeleteCert(pid);
1630
1631    /*
1632     * Handle completed job filters...
1633     */
1634
1635     if (job_id > 0)
1636       job = cupsdFindJob(job_id);
1637     else
1638       job  = NULL;
1639
1640     if (job)
1641     {
1642       for (i = 0; job->filters[i]; i ++)
1643         if (job->filters[i] == pid)
1644           break;
1645
1646       if (job->filters[i] || job->backend == pid)
1647       {
1648        /*
1649         * OK, this process has gone away; what's left?
1650         */
1651
1652         if (job->filters[i])
1653         {
1654           job->filters[i] = -pid;
1655           type            = "Filter";
1656         }
1657         else
1658         {
1659           job->backend = -pid;
1660           type         = "Backend";
1661         }
1662
1663         if (status && status != SIGTERM && status != SIGKILL &&
1664             status != SIGPIPE)
1665         {
1666          /*
1667           * An error occurred; save the exit status so we know to stop
1668           * the printer or cancel the job when all of the filters finish...
1669           *
1670           * A negative status indicates that the backend failed and the
1671           * printer needs to be stopped.
1672           *
1673           * In order to preserve the most serious status, we always log
1674           * when a process dies due to a signal (e.g. SIGABRT, SIGSEGV,
1675           * and SIGBUS) and prefer to log the backend exit status over a
1676           * filter's.
1677           */
1678
1679           int old_status = abs(job->status);
1680
1681           if (WIFSIGNALED(status) ||    /* This process crashed, or */
1682               !job->status ||           /* No process had a status, or */
1683               (!job->filters[i] && WIFEXITED(old_status)))
1684           {                             /* Backend and filter didn't crash */
1685             if (job->filters[i])
1686               job->status = status;     /* Filter failed */
1687             else
1688               job->status = -status;    /* Backend failed */
1689           }
1690
1691           if (job->state_value == IPP_JOB_PROCESSING &&
1692               job->status_level > CUPSD_LOG_ERROR &&
1693               (job->filters[i] || !WIFEXITED(status)))
1694           {
1695             char        message[1024];  /* New printer-state-message */
1696
1697
1698             job->status_level = CUPSD_LOG_ERROR;
1699
1700             snprintf(message, sizeof(message), "%s failed", type);
1701
1702             if (job->printer)
1703             {
1704               strlcpy(job->printer->state_message, message,
1705                        sizeof(job->printer->state_message));
1706             }
1707
1708             if (!job->attrs)
1709               cupsdLoadJob(job);
1710
1711             if (!job->printer_message && job->attrs)
1712             {
1713               if ((job->printer_message =
1714                        ippFindAttribute(job->attrs, "job-printer-state-message",
1715                                         IPP_TAG_TEXT)) == NULL)
1716                 job->printer_message = ippAddString(job->attrs, IPP_TAG_JOB,
1717                                                     IPP_TAG_TEXT,
1718                                                     "job-printer-state-message",
1719                                                     NULL, NULL);
1720             }
1721
1722             if (job->printer_message)
1723               cupsdSetString(&(job->printer_message->values[0].string.text),
1724                              message);
1725           }
1726         }
1727
1728        /*
1729         * If this is not the last file in a job, see if all of the
1730         * filters are done, and if so move to the next file.
1731         */
1732
1733         if (job->current_file < job->num_files && job->printer)
1734         {
1735           for (i = 0; job->filters[i] < 0; i ++);
1736
1737           if (!job->filters[i] &&
1738               (!job->printer->pc || !job->printer->pc->single_file ||
1739                job->backend <= 0))
1740           {
1741            /*
1742             * Process the next file...
1743             */
1744
1745             cupsdContinueJob(job);
1746           }
1747         }
1748         else if (job->state_value >= IPP_JOB_CANCELED)
1749         {
1750          /*
1751           * Remove the job from the active list if there are no processes still
1752           * running for it...
1753           */
1754
1755           for (i = 0; job->filters[i] < 0; i++);
1756
1757           if (!job->filters[i] && job->backend <= 0)
1758             cupsArrayRemove(ActiveJobs, job);
1759         }
1760       }
1761     }
1762
1763    /*
1764     * Show the exit status as needed, ignoring SIGTERM and SIGKILL errors
1765     * since they come when we kill/end a process...
1766     */
1767
1768     if (status == SIGTERM || status == SIGKILL)
1769     {
1770       cupsdLogJob(job, CUPSD_LOG_DEBUG,
1771                   "PID %d (%s) was terminated normally with signal %d.", pid,
1772                   name, status);
1773     }
1774     else if (status == SIGPIPE)
1775     {
1776       cupsdLogJob(job, CUPSD_LOG_DEBUG,
1777                   "PID %d (%s) did not catch or ignore signal %d.", pid, name,
1778                   status);
1779     }
1780     else if (status)
1781     {
1782       if (WIFEXITED(status))
1783       {
1784         int code = WEXITSTATUS(status); /* Exit code */
1785
1786         if (code > 100)
1787           cupsdLogJob(job, CUPSD_LOG_DEBUG,
1788                       "PID %d (%s) stopped with status %d (%s)", pid, name,
1789                       code, strerror(code - 100));
1790         else
1791           cupsdLogJob(job, CUPSD_LOG_DEBUG,
1792                       "PID %d (%s) stopped with status %d.", pid, name, code);
1793       }
1794       else
1795         cupsdLogJob(job, CUPSD_LOG_DEBUG, "PID %d (%s) crashed on signal %d.",
1796                     pid, name, WTERMSIG(status));
1797
1798       if (LogLevel < CUPSD_LOG_DEBUG)
1799         cupsdLogJob(job, CUPSD_LOG_INFO,
1800                     "Hint: Try setting the LogLevel to \"debug\" to find out "
1801                     "more.");
1802     }
1803     else
1804       cupsdLogJob(job, CUPSD_LOG_DEBUG, "PID %d (%s) exited with no errors.",
1805                   pid, name);
1806   }
1807
1808  /*
1809   * If wait*() is interrupted by a signal, tell main() to call us again...
1810   */
1811
1812   if (pid < 0 && errno == EINTR)
1813     dead_children = 1;
1814 }
1815
1816
1817 /*
1818  * 'select_timeout()' - Calculate the select timeout value.
1819  *
1820  */
1821
1822 static long                             /* O - Number of seconds */
1823 select_timeout(int fds)                 /* I - Number of descriptors returned */
1824 {
1825   long                  timeout;        /* Timeout for select */
1826   time_t                now;            /* Current time */
1827   cupsd_client_t        *con;           /* Client information */
1828   cupsd_job_t           *job;           /* Job information */
1829   cupsd_subscription_t  *sub;           /* Subscription information */
1830   const char            *why;           /* Debugging aid */
1831
1832
1833   cupsdLogMessage(CUPSD_LOG_DEBUG2, "select_timeout: JobHistoryUpdate=%ld",
1834                   (long)JobHistoryUpdate);
1835
1836  /*
1837   * Check to see if any of the clients have pending data to be
1838   * processed; if so, the timeout should be 0...
1839   */
1840
1841   // TODO: Use httpGetReady()
1842   for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
1843        con;
1844        con = (cupsd_client_t *)cupsArrayNext(Clients))
1845     if (con->http->used > 0)
1846       return (0);
1847
1848  /*
1849   * If select has been active in the last second (fds > 0) or we have
1850   * many resources in use then don't bother trying to optimize the
1851   * timeout, just make it 1 second.
1852   */
1853
1854   if (fds > 0 || cupsArrayCount(Clients) > 50)
1855     return (1);
1856
1857  /*
1858   * Otherwise, check all of the possible events that we need to wake for...
1859   */
1860
1861   now     = time(NULL);
1862   timeout = now + 86400;                /* 86400 == 1 day */
1863   why     = "do nothing";
1864
1865 #ifdef __APPLE__
1866  /*
1867   * When going to sleep, wake up to cancel jobs that don't complete in time.
1868   */
1869
1870   if (SleepJobs > 0 && SleepJobs < timeout)
1871   {
1872     timeout = SleepJobs;
1873     why     = "cancel jobs before sleeping";
1874   }
1875 #endif /* __APPLE__ */
1876
1877  /*
1878   * Check whether we are accepting new connections...
1879   */
1880
1881   if (ListeningPaused > 0 && cupsArrayCount(Clients) < MaxClients &&
1882       ListeningPaused < timeout)
1883   {
1884     if (ListeningPaused <= now)
1885       timeout = now;
1886     else
1887       timeout = ListeningPaused;
1888
1889     why = "resume listening";
1890   }
1891
1892  /*
1893   * Check the activity and close old clients...
1894   */
1895
1896   // TODO: Use httpGetActivity()
1897   for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
1898        con;
1899        con = (cupsd_client_t *)cupsArrayNext(Clients))
1900     if ((con->http->activity + Timeout) < timeout)
1901     {
1902       timeout = con->http->activity + Timeout;
1903       why     = "timeout a client connection";
1904     }
1905
1906  /*
1907   * Write out changes to configuration and state files...
1908   */
1909
1910   if (DirtyCleanTime && timeout > DirtyCleanTime)
1911   {
1912     timeout = DirtyCleanTime;
1913     why     = "write dirty config/state files";
1914   }
1915
1916  /*
1917   * Check for any job activity...
1918   */
1919
1920   if (JobHistoryUpdate && timeout > JobHistoryUpdate)
1921   {
1922     timeout = JobHistoryUpdate;
1923     why     = "update job history";
1924   }
1925
1926   for (job = (cupsd_job_t *)cupsArrayFirst(ActiveJobs);
1927        job;
1928        job = (cupsd_job_t *)cupsArrayNext(ActiveJobs))
1929   {
1930     if (job->cancel_time && job->cancel_time < timeout)
1931     {
1932       timeout = job->cancel_time;
1933       why     = "cancel stuck jobs";
1934     }
1935
1936     if (job->kill_time && job->kill_time < timeout)
1937     {
1938       timeout = job->kill_time;
1939       why     = "kill unresponsive jobs";
1940     }
1941
1942     if (job->state_value == IPP_JOB_HELD && job->hold_until < timeout)
1943     {
1944       timeout = job->hold_until;
1945       why     = "release held jobs";
1946     }
1947
1948     if (job->state_value == IPP_JOB_PENDING && timeout > (now + 10))
1949     {
1950       timeout = now + 10;
1951       why     = "start pending jobs";
1952       break;
1953     }
1954   }
1955
1956 #ifdef HAVE_MALLINFO
1957  /*
1958   * Log memory usage every minute...
1959   */
1960
1961   if (LogLevel >= CUPSD_LOG_DEBUG && (mallinfo_time + 60) < timeout)
1962   {
1963     timeout = mallinfo_time + 60;
1964     why     = "display memory usage";
1965   }
1966 #endif /* HAVE_MALLINFO */
1967
1968  /*
1969   * Expire subscriptions as needed...
1970   */
1971
1972   for (sub = (cupsd_subscription_t *)cupsArrayFirst(Subscriptions);
1973        sub;
1974        sub = (cupsd_subscription_t *)cupsArrayNext(Subscriptions))
1975     if (!sub->job && sub->expire && sub->expire < timeout)
1976     {
1977       timeout = sub->expire;
1978       why     = "expire subscription";
1979     }
1980
1981  /*
1982   * Adjust from absolute to relative time.  We add 1 second to the timeout since
1983   * events occur after the timeout expires, and limit the timeout to 86400
1984   * seconds (1 day) to avoid select() timeout limits present on some operating
1985   * systems...
1986   */
1987
1988   timeout = timeout - now + 1;
1989
1990   if (timeout < 1)
1991     timeout = 1;
1992   else if (timeout > 86400)
1993     timeout = 86400;
1994
1995  /*
1996   * Log and return the timeout value...
1997   */
1998
1999   cupsdLogMessage(CUPSD_LOG_DEBUG2, "select_timeout(%d): %ld seconds to %s",
2000                   fds, timeout, why);
2001
2002   return (timeout);
2003 }
2004
2005
2006 /*
2007  * 'sigchld_handler()' - Handle 'child' signals from old processes.
2008  */
2009
2010 static void
2011 sigchld_handler(int sig)                /* I - Signal number */
2012 {
2013   (void)sig;
2014
2015  /*
2016   * Flag that we have dead children...
2017   */
2018
2019   dead_children = 1;
2020
2021  /*
2022   * Reset the signal handler as needed...
2023   */
2024
2025 #if !defined(HAVE_SIGSET) && !defined(HAVE_SIGACTION)
2026   signal(SIGCLD, sigchld_handler);
2027 #endif /* !HAVE_SIGSET && !HAVE_SIGACTION */
2028 }
2029
2030
2031 /*
2032  * 'sighup_handler()' - Handle 'hangup' signals to reconfigure the scheduler.
2033  */
2034
2035 static void
2036 sighup_handler(int sig)                 /* I - Signal number */
2037 {
2038   (void)sig;
2039
2040   NeedReload = RELOAD_ALL;
2041   ReloadTime = time(NULL);
2042
2043 #if !defined(HAVE_SIGSET) && !defined(HAVE_SIGACTION)
2044   signal(SIGHUP, sighup_handler);
2045 #endif /* !HAVE_SIGSET && !HAVE_SIGACTION */
2046 }
2047
2048
2049 /*
2050  * 'sigterm_handler()' - Handle 'terminate' signals that stop the scheduler.
2051  */
2052
2053 static void
2054 sigterm_handler(int sig)                /* I - Signal number */
2055 {
2056   (void)sig;    /* remove compiler warnings... */
2057
2058  /*
2059   * Flag that we should stop and return...
2060   */
2061
2062   stop_scheduler = 1;
2063 }
2064
2065
2066 /*
2067  * 'usage()' - Show scheduler usage.
2068  */
2069
2070 static void
2071 usage(int status)                       /* O - Exit status */
2072 {
2073   FILE  *fp = status ? stderr : stdout; /* Output file */
2074
2075
2076   _cupsLangPuts(fp, _("Usage: cupsd [options]"));
2077   _cupsLangPuts(fp, _("Options:"));
2078   _cupsLangPuts(fp, _("  -c cupsd.conf           Set cupsd.conf file to use."));
2079   _cupsLangPuts(fp, _("  -f                      Run in the foreground."));
2080   _cupsLangPuts(fp, _("  -F                      Run in the foreground but "
2081                       "detach from console."));
2082   _cupsLangPuts(fp, _("  -h                      Show this usage message."));
2083   _cupsLangPuts(fp, _("  -l                      Run cupsd from launchd(8)."));
2084   _cupsLangPuts(fp, _("  -t                      Test the configuration "
2085                       "file."));
2086
2087   exit(status);
2088 }
2089
2090
2091 /*
2092  * End of "$Id$".
2093  */