scheduler/main.c

   1 /*
   2  * Main loop for the CUPS scheduler.
   3  *
   4  * Copyright 2007-2016 by Apple Inc.
   5  * Copyright 1997-2007 by Easy Software Products, all rights reserved.
   6  *
   7  * These coded instructions, statements, and computer programs are the
   8  * property of Apple Inc. and are protected by Federal copyright
   9  * law.  Distribution and use rights are outlined in the file "LICENSE.txt"
  10  * "LICENSE" which should have been included with this file.  If this
  11  * file is missing or damaged, see the license at "http://www.cups.org/".
  12  */
  13
  14 /*
  15  * Include necessary headers...
  16  */
  17
  18 #define _MAIN_C_
  19 #include "cupsd.h"
  20 #include <sys/resource.h>
  21 #ifdef HAVE_ASL_H
  22 #  include <asl.h>
  23 #elif defined(HAVE_SYSTEMD_SD_JOURNAL_H)
  24 #  define SD_JOURNAL_SUPPRESS_LOCATION
  25 #  include <systemd/sd-journal.h>
  26 #endif /* HAVE_ASL_H */
  27 #include <syslog.h>
  28 #include <grp.h>
  29
  30 #ifdef HAVE_LAUNCH_H
  31 #  include <launch.h>
  32 #  include <libgen.h>
  33 #  define CUPS_KEEPALIVE CUPS_CACHEDIR "/org.cups.cupsd"
  34                                         /* Name of the launchd KeepAlive file */
  35 #  ifdef HAVE_LAUNCH_ACTIVATE_SOCKET
  36 /* Update when we have a public header we can include */
  37 extern int launch_activate_socket(const char *name, int **fds, size_t *cnt);
  38 #  endif /* HAVE_LAUNCH_ACTIVATE_SOCKET */
  39 #endif /* HAVE_LAUNCH_H */
  40
  41 #ifdef HAVE_SYSTEMD
  42 #  include <systemd/sd-daemon.h>
  43 #  define CUPS_KEEPALIVE CUPS_CACHEDIR "/org.cups.cupsd"
  44                                         /* Name of the systemd path file */
  45 #endif /* HAVE_SYSTEMD */
  46
  47 #if defined(HAVE_MALLOC_H) && defined(HAVE_MALLINFO)
  48 #  include <malloc.h>
  49 #endif /* HAVE_MALLOC_H && HAVE_MALLINFO */
  50
  51 #ifdef HAVE_NOTIFY_H
  52 #  include <notify.h>
  53 #endif /* HAVE_NOTIFY_H */
  54
  55 #ifdef HAVE_DBUS
  56 #  include <dbus/dbus.h>
  57 #endif /* HAVE_DBUS */
  58
  59 #ifdef HAVE_SYS_PARAM_H
  60 #  include <sys/param.h>
  61 #endif /* HAVE_SYS_PARAM_H */
  62
  63
  64 /*
  65  * Local functions...
  66  */
  67
  68 static void             parent_handler(int sig);
  69 static void             process_children(void);
  70 static void             sigchld_handler(int sig);
  71 static void             sighup_handler(int sig);
  72 static void             sigterm_handler(int sig);
  73 static long             select_timeout(int fds);
  74 #if defined(HAVE_ONDEMAND)
  75 static void             service_checkin(void);
  76 static void             service_checkout(void);
  77 #endif /* HAVE_ONDEMAND */
  78 static void             usage(int status) __attribute__((noreturn));
  79
  80
  81 /*
  82  * Local globals...
  83  */
  84
  85 static int              parent_signal = 0;
  86                                         /* Set to signal number from child */
  87 static int              holdcount = 0;  /* Number of times "hold" was called */
  88 #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
  89 static sigset_t         holdmask;       /* Old POSIX signal mask */
  90 #endif /* HAVE_SIGACTION && !HAVE_SIGSET */
  91 static int              dead_children = 0;
  92                                         /* Dead children? */
  93 static int              stop_scheduler = 0;
  94                                         /* Should the scheduler stop? */
  95
  96
  97 /*
  98  * 'main()' - Main entry for the CUPS scheduler.
  99  */
 100
 101 int                                     /* O - Exit status */
 102 main(int  argc,                         /* I - Number of command-line args */
 103      char *argv[])                      /* I - Command-line arguments */
 104 {
 105   int                   i;              /* Looping var */
 106   char                  *opt;           /* Option character */
 107   int                   close_all = 1,  /* Close all file descriptors? */
 108                         disconnect = 1, /* Disconnect from controlling terminal? */
 109                         fg = 0,         /* Run in foreground? */
 110                         run_as_child = 0,
 111                                         /* Running as child process? */
 112                         print_profile = 0;
 113                                         /* Print the sandbox profile to stdout? */
 114   int                   fds;            /* Number of ready descriptors */
 115   cupsd_client_t        *con;           /* Current client */
 116   cupsd_job_t           *job;           /* Current job */
 117   cupsd_listener_t      *lis;           /* Current listener */
 118   time_t                current_time,   /* Current time */
 119                         activity,       /* Client activity timer */
 120                         senddoc_time,   /* Send-Document time */
 121                         expire_time,    /* Subscription expire time */
 122                         report_time,    /* Malloc/client/job report time */
 123                         event_time;     /* Last event notification time */
 124   long                  timeout;        /* Timeout for cupsdDoSelect() */
 125   struct rlimit         limit;          /* Runtime limit */
 126 #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
 127   struct sigaction      action;         /* Actions for POSIX signals */
 128 #endif /* HAVE_SIGACTION && !HAVE_SIGSET */
 129 #ifdef __APPLE__
 130   int                   use_sysman = 1; /* Use system management functions? */
 131 #else
 132   time_t                netif_time = 0; /* Time since last network update */
 133 #endif /* __APPLE__ */
 134 #if defined(HAVE_ONDEMAND)
 135   int                   service_idle_exit;
 136                                         /* Idle exit on select timeout? */
 137 #endif /* HAVE_ONDEMAND */
 138
 139
 140 #ifdef HAVE_GETEUID
 141  /*
 142   * Check for setuid invocation, which we do not support!
 143   */
 144
 145   if (getuid() != geteuid())
 146   {
 147     fputs("cupsd: Cannot run as a setuid program.\n", stderr);
 148     return (1);
 149   }
 150 #endif /* HAVE_GETEUID */
 151
 152  /*
 153   * Check for command-line arguments...
 154   */
 155
 156   fg = 0;
 157
 158 #ifdef HAVE_LAUNCHD
 159   if (getenv("CUPSD_LAUNCHD"))
 160   {
 161     OnDemand   = 1;
 162     fg         = 1;
 163     close_all  = 0;
 164     disconnect = 0;
 165   }
 166 #endif /* HAVE_LAUNCHD */
 167
 168   for (i = 1; i < argc; i ++)
 169     if (argv[i][0] == '-')
 170       for (opt = argv[i] + 1; *opt != '\0'; opt ++)
 171         switch (*opt)
 172         {
 173           case 'C' : /* Run as child with config file */
 174               run_as_child = 1;
 175               fg           = 1;
 176               close_all    = 0;
 177
 178           case 'c' : /* Configuration file */
 179               i ++;
 180               if (i >= argc)
 181               {
 182                 _cupsLangPuts(stderr, _("cupsd: Expected config filename "
 183                                         "after \"-c\" option."));
 184                 usage(1);
 185               }
 186
 187               if (argv[i][0] == '/')
 188               {
 189                /*
 190                 * Absolute directory...
 191                 */
 192
 193                 cupsdSetString(&ConfigurationFile, argv[i]);
 194               }
 195               else
 196               {
 197                /*
 198                 * Relative directory...
 199                 */
 200
 201                 char *current;          /* Current directory */
 202
 203                /*
 204                 * Allocate a buffer for the current working directory to
 205                 * reduce run-time stack usage; this approximates the
 206                 * behavior of some implementations of getcwd() when they
 207                 * are passed a NULL pointer.
 208                 */
 209
 210                 if ((current = malloc(1024)) == NULL)
 211                 {
 212                   _cupsLangPuts(stderr,
 213                                 _("cupsd: Unable to get current directory."));
 214                   return (1);
 215                 }
 216
 217                 if (!getcwd(current, 1024))
 218                 {
 219                   _cupsLangPuts(stderr,
 220                                 _("cupsd: Unable to get current directory."));
 221                   free(current);
 222                   return (1);
 223                 }
 224
 225                 cupsdSetStringf(&ConfigurationFile, "%s/%s", current, argv[i]);
 226                 free(current);
 227               }
 228               break;
 229
 230           case 'f' : /* Run in foreground... */
 231               fg         = 1;
 232               disconnect = 0;
 233               close_all  = 0;
 234               break;
 235
 236           case 'F' : /* Run in foreground, but disconnect from terminal... */
 237               fg        = 1;
 238               close_all = 0;
 239               break;
 240
 241           case 'h' : /* Show usage/help */
 242               usage(0);
 243               break;
 244
 245           case 'l' : /* Started by launchd/systemd... */
 246 #if defined(HAVE_ONDEMAND)
 247               OnDemand   = 1;
 248               fg         = 1;
 249               close_all  = 0;
 250               disconnect = 0;
 251 #else
 252               _cupsLangPuts(stderr, _("cupsd: On-demand support not compiled "
 253                                       "in, running in normal mode."));
 254               fg         = 0;
 255               disconnect = 1;
 256               close_all  = 1;
 257 #endif /* HAVE_ONDEMAND */
 258               break;
 259
 260           case 'p' : /* Stop immediately for profiling */
 261               fputs("cupsd: -p (startup profiling) is for internal testing "
 262                     "use only!\n", stderr);
 263               stop_scheduler = 1;
 264               fg             = 1;
 265               disconnect     = 0;
 266               close_all      = 0;
 267               break;
 268
 269           case 'P' : /* Disable security profiles */
 270               fputs("cupsd: -P (disable sandboxing) is for internal testing use only.\n", stderr);
 271               UseSandboxing = 0;
 272               break;
 273
 274           case 's' : /* Set cups-files.conf location */
 275               i ++;
 276               if (i >= argc)
 277               {
 278                 _cupsLangPuts(stderr, _("cupsd: Expected cups-files.conf "
 279                                         "filename after \"-s\" option."));
 280                 usage(1);
 281               }
 282
 283               if (argv[i][0] != '/')
 284               {
 285                /*
 286                 * Relative filename not allowed...
 287                 */
 288
 289                 _cupsLangPuts(stderr, _("cupsd: Relative cups-files.conf "
 290                                         "filename not allowed."));
 291                 usage(1);
 292               }
 293
 294               cupsdSetString(&CupsFilesFile, argv[i]);
 295               break;
 296
 297 #ifdef __APPLE__
 298           case 'S' : /* Disable system management functions */
 299               fputs("cupsd: -S (disable system management) for internal "
 300                     "testing use only!\n", stderr);
 301               use_sysman = 0;
 302               break;
 303 #endif /* __APPLE__ */
 304
 305           case 't' : /* Test the cupsd.conf file... */
 306               TestConfigFile = 1;
 307               fg             = 1;
 308               disconnect     = 0;
 309               close_all      = 0;
 310               break;
 311
 312           case 'T' : /* Print security profile */
 313               print_profile = 1;
 314               fg            = 1;
 315               disconnect    = 0;
 316               close_all     = 0;
 317               break;
 318
 319           default : /* Unknown option */
 320               _cupsLangPrintf(stderr, _("cupsd: Unknown option \"%c\" - "
 321                                         "aborting."), *opt);
 322               usage(1);
 323               break;
 324         }
 325     else
 326     {
 327       _cupsLangPrintf(stderr, _("cupsd: Unknown argument \"%s\" - aborting."),
 328                       argv[i]);
 329       usage(1);
 330     }
 331
 332   if (!ConfigurationFile)
 333     cupsdSetString(&ConfigurationFile, CUPS_SERVERROOT "/cupsd.conf");
 334
 335   if (!CupsFilesFile)
 336   {
 337     char        *filename,              /* Copy of cupsd.conf filename */
 338                 *slash;                 /* Final slash in cupsd.conf filename */
 339     size_t      len;                    /* Size of buffer */
 340
 341     len = strlen(ConfigurationFile) + 15;
 342     if ((filename = malloc(len)) == NULL)
 343     {
 344       _cupsLangPrintf(stderr,
 345                       _("cupsd: Unable to get path to "
 346                         "cups-files.conf file."));
 347       return (1);
 348     }
 349
 350     strlcpy(filename, ConfigurationFile, len);
 351     if ((slash = strrchr(filename, '/')) == NULL)
 352     {
 353       _cupsLangPrintf(stderr,
 354                       _("cupsd: Unable to get path to "
 355                         "cups-files.conf file."));
 356       return (1);
 357     }
 358
 359     strlcpy(slash, "/cups-files.conf", len - (size_t)(slash - filename));
 360     cupsdSetString(&CupsFilesFile, filename);
 361     free(filename);
 362   }
 363
 364   if (disconnect)
 365   {
 366    /*
 367     * Make sure we aren't tying up any filesystems...
 368     */
 369
 370     chdir("/");
 371
 372    /*
 373     * Disconnect from the controlling terminal...
 374     */
 375
 376     setsid();
 377   }
 378
 379   if (close_all)
 380   {
 381    /*
 382     * Close all open files...
 383     */
 384
 385     getrlimit(RLIMIT_NOFILE, &limit);
 386
 387     for (i = 0; i < (int)limit.rlim_cur && i < 1024; i ++)
 388       close(i);
 389
 390    /*
 391     * Redirect stdin/out/err to /dev/null...
 392     */
 393
 394     if ((i = open("/dev/null", O_RDONLY)) != 0)
 395     {
 396       dup2(i, 0);
 397       close(i);
 398     }
 399
 400     if ((i = open("/dev/null", O_WRONLY)) != 1)
 401     {
 402       dup2(i, 1);
 403       close(i);
 404     }
 405
 406     if ((i = open("/dev/null", O_WRONLY)) != 2)
 407     {
 408       dup2(i, 2);
 409       close(i);
 410     }
 411   }
 412   else
 413     LogStderr = cupsFileStderr();
 414
 415  /*
 416   * Run in the background as needed...
 417   */
 418
 419   if (!fg)
 420   {
 421    /*
 422     * Setup signal handlers for the parent...
 423     */
 424
 425 #ifdef HAVE_SIGSET /* Use System V signals over POSIX to avoid bugs */
 426     sigset(SIGUSR1, parent_handler);
 427     sigset(SIGCHLD, parent_handler);
 428
 429     sigset(SIGHUP, SIG_IGN);
 430 #elif defined(HAVE_SIGACTION)
 431     memset(&action, 0, sizeof(action));
 432     sigemptyset(&action.sa_mask);
 433     sigaddset(&action.sa_mask, SIGUSR1);
 434     action.sa_handler = parent_handler;
 435     sigaction(SIGUSR1, &action, NULL);
 436     sigaction(SIGCHLD, &action, NULL);
 437
 438     sigemptyset(&action.sa_mask);
 439     action.sa_handler = SIG_IGN;
 440     sigaction(SIGHUP, &action, NULL);
 441 #else
 442     signal(SIGUSR1, parent_handler);
 443     signal(SIGCLD, parent_handler);
 444
 445     signal(SIGHUP, SIG_IGN);
 446 #endif /* HAVE_SIGSET */
 447
 448     if (fork() > 0)
 449     {
 450      /*
 451       * OK, wait for the child to startup and send us SIGUSR1 or to crash
 452       * and the OS send us SIGCHLD...  We also need to ignore SIGHUP which
 453       * might be sent by the init script to restart the scheduler...
 454       */
 455
 456       for (; parent_signal == 0;)
 457         sleep(1);
 458
 459       if (parent_signal == SIGUSR1)
 460         return (0);
 461
 462       if (wait(&i) < 0)
 463       {
 464         perror("cupsd");
 465         return (1);
 466       }
 467       else if (WIFEXITED(i))
 468       {
 469         fprintf(stderr, "cupsd: Child exited with status %d\n",
 470                 WEXITSTATUS(i));
 471         return (2);
 472       }
 473       else
 474       {
 475         fprintf(stderr, "cupsd: Child exited on signal %d\n", WTERMSIG(i));
 476         return (3);
 477       }
 478     }
 479
 480 #if defined(__OpenBSD__) && OpenBSD < 201211
 481    /*
 482     * Call _thread_sys_closefrom() so the child process doesn't reset the
 483     * parent's file descriptors to be blocking.  This is a workaround for a
 484     * limitation of userland libpthread on older versions of OpenBSD.
 485     */
 486
 487     _thread_sys_closefrom(0);
 488 #endif /* __OpenBSD__ && OpenBSD < 201211 */
 489
 490    /*
 491     * Since many system libraries create fork-unsafe data on execution of a
 492     * program, we need to re-execute the background cupsd with the "-C" and "-s"
 493     * options to avoid problems.  Unfortunately, we also have to assume that
 494     * argv[0] contains the name of the cupsd executable - there is no portable
 495     * way to get the real pathname...
 496     */
 497
 498     execlp(argv[0], argv[0], "-C", ConfigurationFile, "-s", CupsFilesFile, (char *)0);
 499     exit(errno);
 500   }
 501
 502  /*
 503   * Set the timezone info...
 504   */
 505
 506   tzset();
 507
 508 #ifdef LC_TIME
 509   setlocale(LC_TIME, "");
 510 #endif /* LC_TIME */
 511
 512 #ifdef HAVE_DBUS_THREADS_INIT
 513  /*
 514   * Enable threading support for D-BUS...
 515   */
 516
 517   dbus_threads_init_default();
 518 #endif /* HAVE_DBUS_THREADS_INIT */
 519
 520  /*
 521   * Set the maximum number of files...
 522   */
 523
 524   getrlimit(RLIMIT_NOFILE, &limit);
 525
 526 #if !defined(HAVE_POLL) && !defined(HAVE_EPOLL) && !defined(HAVE_KQUEUE)
 527   if (limit.rlim_max > FD_SETSIZE)
 528     MaxFDs = FD_SETSIZE;
 529   else
 530 #endif /* !HAVE_POLL && !HAVE_EPOLL && !HAVE_KQUEUE */
 531 #ifdef RLIM_INFINITY
 532   if (limit.rlim_max == RLIM_INFINITY)
 533     MaxFDs = 16384;
 534   else
 535 #endif /* RLIM_INFINITY */
 536     MaxFDs = limit.rlim_max;
 537
 538   limit.rlim_cur = (rlim_t)MaxFDs;
 539
 540   setrlimit(RLIMIT_NOFILE, &limit);
 541
 542   cupsdStartSelect();
 543
 544  /*
 545   * Read configuration...
 546   */
 547
 548   if (!cupsdReadConfiguration())
 549     return (1);
 550   else if (TestConfigFile)
 551   {
 552     printf("\"%s\" is OK.\n", CupsFilesFile);
 553     printf("\"%s\" is OK.\n", ConfigurationFile);
 554     return (0);
 555   }
 556   else if (print_profile)
 557   {
 558     cups_file_t *fp;                    /* File pointer */
 559     const char  *profile = cupsdCreateProfile(42, 0);
 560                                         /* Profile */
 561     char        line[1024];             /* Line from file */
 562
 563
 564     if ((fp = cupsFileOpen(profile, "r")) == NULL)
 565     {
 566       printf("Unable to open profile file \"%s\": %s\n", profile ? profile : "(null)", strerror(errno));
 567       return (1);
 568     }
 569
 570     while (cupsFileGets(fp, line, sizeof(line)))
 571       puts(line);
 572
 573     cupsFileClose(fp);
 574
 575     return (0);
 576   }
 577
 578  /*
 579   * Clean out old temp files and printer cache data.
 580   */
 581
 582   if (!strncmp(TempDir, RequestRoot, strlen(RequestRoot)))
 583     cupsdCleanFiles(TempDir, NULL);
 584
 585   cupsdCleanFiles(CacheDir, "*.ipp");
 586
 587 #if defined(HAVE_ONDEMAND)
 588   if (OnDemand)
 589   {
 590    /*
 591     * If we were started on demand by launchd or systemd get the listen sockets
 592     * file descriptors...
 593     */
 594
 595     service_checkin();
 596     service_checkout();
 597   }
 598 #endif /* HAVE_ONDEMAND */
 599
 600  /*
 601   * Startup the server...
 602   */
 603
 604   httpInitialize();
 605
 606   cupsdStartServer();
 607
 608  /*
 609   * Catch hangup and child signals and ignore broken pipes...
 610   */
 611
 612 #ifdef HAVE_SIGSET /* Use System V signals over POSIX to avoid bugs */
 613   sigset(SIGCHLD, sigchld_handler);
 614   sigset(SIGHUP, sighup_handler);
 615   sigset(SIGPIPE, SIG_IGN);
 616   sigset(SIGTERM, sigterm_handler);
 617 #elif defined(HAVE_SIGACTION)
 618   memset(&action, 0, sizeof(action));
 619
 620   sigemptyset(&action.sa_mask);
 621   sigaddset(&action.sa_mask, SIGTERM);
 622   sigaddset(&action.sa_mask, SIGCHLD);
 623   action.sa_handler = sigchld_handler;
 624   sigaction(SIGCHLD, &action, NULL);
 625
 626   sigemptyset(&action.sa_mask);
 627   sigaddset(&action.sa_mask, SIGHUP);
 628   action.sa_handler = sighup_handler;
 629   sigaction(SIGHUP, &action, NULL);
 630
 631   sigemptyset(&action.sa_mask);
 632   action.sa_handler = SIG_IGN;
 633   sigaction(SIGPIPE, &action, NULL);
 634
 635   sigemptyset(&action.sa_mask);
 636   sigaddset(&action.sa_mask, SIGTERM);
 637   sigaddset(&action.sa_mask, SIGCHLD);
 638   action.sa_handler = sigterm_handler;
 639   sigaction(SIGTERM, &action, NULL);
 640 #else
 641   signal(SIGCLD, sigchld_handler);      /* No, SIGCLD isn't a typo... */
 642   signal(SIGHUP, sighup_handler);
 643   signal(SIGPIPE, SIG_IGN);
 644   signal(SIGTERM, sigterm_handler);
 645 #endif /* HAVE_SIGSET */
 646
 647  /*
 648   * Initialize authentication certificates...
 649   */
 650
 651   cupsdInitCerts();
 652
 653  /*
 654   * If we are running in the background, signal the parent process that
 655   * we are up and running...
 656   */
 657
 658   if (!fg || run_as_child)
 659   {
 660    /*
 661     * Send a signal to the parent process, but only if the parent is
 662     * not PID 1 (init).  This avoids accidentally shutting down the
 663     * system on OpenBSD if you CTRL-C the server before it is up...
 664     */
 665
 666     i = getppid();      /* Save parent PID to avoid race condition */
 667
 668     if (i != 1)
 669       kill(i, SIGUSR1);
 670   }
 671
 672 #ifdef __APPLE__
 673  /*
 674   * Start power management framework...
 675   */
 676
 677   if (use_sysman)
 678     cupsdStartSystemMonitor();
 679 #endif /* __APPLE__ */
 680
 681  /*
 682   * Send server-started event...
 683   */
 684
 685 #if defined(HAVE_ONDEMAND)
 686   if (OnDemand)
 687     cupsdAddEvent(CUPSD_EVENT_SERVER_STARTED, NULL, NULL, "Scheduler started on demand.");
 688   else
 689 #endif /* HAVE_ONDEMAND */
 690   if (fg)
 691     cupsdAddEvent(CUPSD_EVENT_SERVER_STARTED, NULL, NULL, "Scheduler started in foreground.");
 692   else
 693     cupsdAddEvent(CUPSD_EVENT_SERVER_STARTED, NULL, NULL, "Scheduler started in background.");
 694
 695  /*
 696   * Start any pending print jobs...
 697   */
 698
 699   cupsdCheckJobs();
 700
 701  /*
 702   * Loop forever...
 703   */
 704
 705   current_time  = time(NULL);
 706   event_time    = current_time;
 707   expire_time   = current_time;
 708   fds           = 1;
 709   report_time   = 0;
 710   senddoc_time  = current_time;
 711
 712   while (!stop_scheduler)
 713   {
 714    /*
 715     * Check if there are dead children to handle...
 716     */
 717
 718     if (dead_children)
 719       process_children();
 720
 721    /*
 722     * Check if we need to load the server configuration file...
 723     */
 724
 725     if (NeedReload)
 726     {
 727      /*
 728       * Close any idle clients...
 729       */
 730
 731       if (cupsArrayCount(Clients) > 0)
 732       {
 733         for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
 734              con;
 735              con = (cupsd_client_t *)cupsArrayNext(Clients))
 736           if (httpGetState(con->http) == HTTP_WAITING)
 737             cupsdCloseClient(con);
 738           else
 739             con->http->keep_alive = HTTP_KEEPALIVE_OFF;
 740
 741         cupsdPauseListening();
 742       }
 743
 744      /*
 745       * Restart if all clients are closed and all jobs finished, or
 746       * if the reload timeout has elapsed...
 747       */
 748
 749       if ((cupsArrayCount(Clients) == 0 &&
 750            (cupsArrayCount(PrintingJobs) == 0 || NeedReload != RELOAD_ALL)) ||
 751           (time(NULL) - ReloadTime) >= ReloadTimeout)
 752       {
 753        /*
 754         * Shutdown the server...
 755         */
 756
 757         DoingShutdown = 1;
 758
 759         cupsdStopServer();
 760
 761        /*
 762         * Read configuration...
 763         */
 764
 765         if (!cupsdReadConfiguration())
 766         {
 767 #ifdef HAVE_ASL_H
 768           asl_object_t  m;              /* Log message */
 769
 770           m = asl_new(ASL_TYPE_MSG);
 771           asl_set(m, ASL_KEY_FACILITY, "org.cups.cupsd");
 772           asl_log(NULL, m, ASL_LEVEL_ERR, "Unable to read configuration file \"%s\" - exiting.", ConfigurationFile);
 773           asl_release(m);
 774 #elif defined(HAVE_SYSTEMD_SD_JOURNAL_H)
 775           sd_journal_print(LOG_ERR, "Unable to read configuration file \"%s\" - exiting.", ConfigurationFile);
 776 #else
 777           syslog(LOG_LPR, "Unable to read configuration file \'%s\' - exiting.", ConfigurationFile);
 778 #endif /* HAVE_ASL_H */
 779
 780           break;
 781         }
 782
 783        /*
 784         * Startup the server...
 785         */
 786
 787         DoingShutdown = 0;
 788
 789         cupsdStartServer();
 790
 791        /*
 792         * Send a server-restarted event...
 793         */
 794
 795         cupsdAddEvent(CUPSD_EVENT_SERVER_RESTARTED, NULL, NULL,
 796                       "Scheduler restarted.");
 797       }
 798     }
 799
 800    /*
 801     * Check for available input or ready output.  If cupsdDoSelect()
 802     * returns 0 or -1, something bad happened and we should exit
 803     * immediately.
 804     *
 805     * Note that we at least have one listening socket open at all
 806     * times.
 807     */
 808
 809     if ((timeout = select_timeout(fds)) > 1 && LastEvent)
 810       timeout = 1;
 811
 812 #if defined(HAVE_ONDEMAND)
 813    /*
 814     * If no other work is scheduled and we're being controlled by
 815     * launchd then timeout after 'LaunchdTimeout' seconds of
 816     * inactivity...
 817     */
 818
 819     if (timeout == 86400 && OnDemand && IdleExitTimeout &&
 820         !cupsArrayCount(ActiveJobs) &&
 821 #  ifdef HAVE_SYSTEMD
 822         !WebInterface &&
 823 #  endif /* HAVE_SYSTEMD */
 824         (!Browsing || !BrowseLocalProtocols || !cupsArrayCount(Printers)))
 825     {
 826       timeout           = IdleExitTimeout;
 827       service_idle_exit = 1;
 828     }
 829     else
 830       service_idle_exit = 0;
 831 #endif  /* HAVE_ONDEMAND */
 832
 833     if ((fds = cupsdDoSelect(timeout)) < 0)
 834     {
 835      /*
 836       * Got an error from select!
 837       */
 838
 839 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
 840       cupsd_printer_t   *p;             /* Current printer */
 841 #endif /* HAVE_DNSSD || HAVE_AVAHI */
 842
 843
 844       if (errno == EINTR)               /* Just interrupted by a signal */
 845         continue;
 846
 847      /*
 848       * Log all sorts of debug info to help track down the problem.
 849       */
 850
 851       cupsdLogMessage(CUPSD_LOG_EMERG, "cupsdDoSelect() failed - %s!",
 852                       strerror(errno));
 853
 854       for (i = 0, con = (cupsd_client_t *)cupsArrayFirst(Clients);
 855            con;
 856            i ++, con = (cupsd_client_t *)cupsArrayNext(Clients))
 857         cupsdLogMessage(CUPSD_LOG_EMERG,
 858                         "Clients[%d] = %d, file = %d, state = %d",
 859                         i, con->number, con->file, httpGetState(con->http));
 860
 861       for (i = 0, lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
 862            lis;
 863            i ++, lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
 864         cupsdLogMessage(CUPSD_LOG_EMERG, "Listeners[%d] = %d", i, lis->fd);
 865
 866       cupsdLogMessage(CUPSD_LOG_EMERG, "CGIPipes[0] = %d", CGIPipes[0]);
 867
 868 #ifdef __APPLE__
 869       cupsdLogMessage(CUPSD_LOG_EMERG, "SysEventPipes[0] = %d",
 870                       SysEventPipes[0]);
 871 #endif /* __APPLE__ */
 872
 873       for (job = (cupsd_job_t *)cupsArrayFirst(ActiveJobs);
 874            job;
 875            job = (cupsd_job_t *)cupsArrayNext(ActiveJobs))
 876         cupsdLogMessage(CUPSD_LOG_EMERG, "Jobs[%d] = %d < [%d %d] > [%d %d]",
 877                         job->id,
 878                         job->status_buffer ? job->status_buffer->fd : -1,
 879                         job->print_pipes[0], job->print_pipes[1],
 880                         job->back_pipes[0], job->back_pipes[1]);
 881
 882 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
 883       for (p = (cupsd_printer_t *)cupsArrayFirst(Printers);
 884            p;
 885            p = (cupsd_printer_t *)cupsArrayNext(Printers))
 886         cupsdLogMessage(CUPSD_LOG_EMERG, "printer[%s] reg_name=\"%s\"", p->name,
 887                         p->reg_name ? p->reg_name : "(null)");
 888 #endif /* HAVE_DNSSD || HAVE_AVAHI */
 889
 890       break;
 891     }
 892
 893     current_time = time(NULL);
 894
 895    /*
 896     * Write dirty config/state files...
 897     */
 898
 899     if (DirtyCleanTime && current_time >= DirtyCleanTime)
 900       cupsdCleanDirty();
 901
 902 #ifdef __APPLE__
 903    /*
 904     * If we are going to sleep and still have pending jobs, stop them after
 905     * a period of time...
 906     */
 907
 908     if (SleepJobs > 0 && current_time >= SleepJobs &&
 909         cupsArrayCount(PrintingJobs) > 0)
 910     {
 911       SleepJobs = 0;
 912       cupsdStopAllJobs(CUPSD_JOB_DEFAULT, 5);
 913     }
 914 #endif /* __APPLE__ */
 915
 916 #ifndef __APPLE__
 917    /*
 918     * Update the network interfaces once a minute...
 919     */
 920
 921     if ((current_time - netif_time) >= 60)
 922     {
 923       netif_time  = current_time;
 924       NetIFUpdate = 1;
 925     }
 926 #endif /* !__APPLE__ */
 927
 928 #if defined(HAVE_ONDEMAND)
 929    /*
 930     * If no other work was scheduled and we're being controlled by launchd
 931     * then timeout after 'LaunchdTimeout' seconds of inactivity...
 932     */
 933
 934     if (!fds && service_idle_exit)
 935     {
 936       cupsdLogMessage(CUPSD_LOG_INFO,
 937                       "Printer sharing is off and there are no jobs pending, "
 938                       "will restart on demand.");
 939       stop_scheduler = 1;
 940       break;
 941     }
 942 #endif /* HAVE_ONDEMAND */
 943
 944    /*
 945     * Resume listening for new connections as needed...
 946     */
 947
 948     if (ListeningPaused && ListeningPaused <= current_time &&
 949         cupsArrayCount(Clients) < MaxClients)
 950       cupsdResumeListening();
 951
 952    /*
 953     * Expire subscriptions and unload completed jobs as needed...
 954     */
 955
 956     if (current_time > expire_time)
 957     {
 958       if (cupsArrayCount(Subscriptions) > 0)
 959         cupsdExpireSubscriptions(NULL, NULL);
 960
 961       cupsdUnloadCompletedJobs();
 962
 963       expire_time = current_time;
 964     }
 965
 966 #ifndef HAVE_AUTHORIZATION_H
 967    /*
 968     * Update the root certificate once every 5 minutes if we have client
 969     * connections...
 970     */
 971
 972     if ((current_time - RootCertTime) >= RootCertDuration && RootCertDuration &&
 973         !RunUser && cupsArrayCount(Clients))
 974     {
 975      /*
 976       * Update the root certificate...
 977       */
 978
 979       cupsdDeleteCert(0);
 980       cupsdAddCert(0, "root", cupsdDefaultAuthType());
 981     }
 982 #endif /* !HAVE_AUTHORIZATION_H */
 983
 984    /*
 985     * Check for new data on the client sockets...
 986     */
 987
 988     for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
 989          con;
 990          con = (cupsd_client_t *)cupsArrayNext(Clients))
 991     {
 992      /*
 993       * Process pending data in the input buffer...
 994       */
 995
 996       if (httpGetReady(con->http))
 997       {
 998         cupsdReadClient(con);
 999         continue;
1000       }
1001
1002      /*
1003       * Check the activity and close old clients...
1004       */
1005
1006       activity = current_time - Timeout;
1007       if (httpGetActivity(con->http) < activity && !con->pipe_pid)
1008       {
1009         cupsdLogMessage(CUPSD_LOG_DEBUG, "Closing client %d after %d seconds of inactivity.", con->number, Timeout);
1010
1011         cupsdCloseClient(con);
1012         continue;
1013       }
1014     }
1015
1016    /*
1017     * Update any pending multi-file documents...
1018     */
1019
1020     if ((current_time - senddoc_time) >= 10)
1021     {
1022       cupsdCheckJobs();
1023       senddoc_time = current_time;
1024     }
1025
1026    /*
1027     * Clean job history...
1028     */
1029
1030     if (JobHistoryUpdate && current_time >= JobHistoryUpdate)
1031       cupsdCleanJobs();
1032
1033    /*
1034     * Log statistics at most once a minute when in debug mode...
1035     */
1036
1037     if ((current_time - report_time) >= 60 && LogLevel >= CUPSD_LOG_DEBUG)
1038     {
1039       size_t            string_count,   /* String count */
1040                         alloc_bytes,    /* Allocated string bytes */
1041                         total_bytes;    /* Total string bytes */
1042 #ifdef HAVE_MALLINFO
1043       struct mallinfo   mem;            /* Malloc information */
1044
1045
1046       mem = mallinfo();
1047       cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: malloc-arena=%lu", mem.arena);
1048       cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: malloc-used=%lu",
1049                       mem.usmblks + mem.uordblks);
1050       cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: malloc-free=%lu",
1051                       mem.fsmblks + mem.fordblks);
1052 #endif /* HAVE_MALLINFO */
1053
1054       cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: clients=%d",
1055                       cupsArrayCount(Clients));
1056       cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: jobs=%d",
1057                       cupsArrayCount(Jobs));
1058       cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: jobs-active=%d",
1059                       cupsArrayCount(ActiveJobs));
1060       cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: printers=%d",
1061                       cupsArrayCount(Printers));
1062
1063       string_count = _cupsStrStatistics(&alloc_bytes, &total_bytes);
1064       cupsdLogMessage(CUPSD_LOG_DEBUG,
1065                       "Report: stringpool-string-count=" CUPS_LLFMT,
1066                       CUPS_LLCAST string_count);
1067       cupsdLogMessage(CUPSD_LOG_DEBUG,
1068                       "Report: stringpool-alloc-bytes=" CUPS_LLFMT,
1069                       CUPS_LLCAST alloc_bytes);
1070       cupsdLogMessage(CUPSD_LOG_DEBUG,
1071                       "Report: stringpool-total-bytes=" CUPS_LLFMT,
1072                       CUPS_LLCAST total_bytes);
1073
1074       report_time = current_time;
1075     }
1076
1077    /*
1078     * Handle OS-specific event notification for any events that have
1079     * accumulated.  Don't send these more than once a second...
1080     */
1081
1082     if (LastEvent && (current_time - event_time) >= 1)
1083     {
1084 #ifdef HAVE_NOTIFY_POST
1085       if (LastEvent & (CUPSD_EVENT_PRINTER_ADDED |
1086                        CUPSD_EVENT_PRINTER_DELETED |
1087                        CUPSD_EVENT_PRINTER_MODIFIED))
1088       {
1089         cupsdLogMessage(CUPSD_LOG_DEBUG2,
1090                         "notify_post(\"com.apple.printerListChange\")");
1091         notify_post("com.apple.printerListChange");
1092       }
1093
1094       if (LastEvent & CUPSD_EVENT_PRINTER_STATE_CHANGED)
1095       {
1096         cupsdLogMessage(CUPSD_LOG_DEBUG2,
1097                         "notify_post(\"com.apple.printerHistoryChange\")");
1098         notify_post("com.apple.printerHistoryChange");
1099       }
1100
1101       if (LastEvent & (CUPSD_EVENT_JOB_STATE_CHANGED |
1102                        CUPSD_EVENT_JOB_CONFIG_CHANGED |
1103                        CUPSD_EVENT_JOB_PROGRESS))
1104       {
1105         cupsdLogMessage(CUPSD_LOG_DEBUG2,
1106                         "notify_post(\"com.apple.jobChange\")");
1107         notify_post("com.apple.jobChange");
1108       }
1109 #endif /* HAVE_NOTIFY_POST */
1110
1111      /*
1112       * Reset the accumulated events...
1113       */
1114
1115       LastEvent  = CUPSD_EVENT_NONE;
1116       event_time = current_time;
1117     }
1118   }
1119
1120  /*
1121   * Log a message based on what happened...
1122   */
1123
1124   if (stop_scheduler)
1125   {
1126     cupsdLogMessage(CUPSD_LOG_INFO, "Scheduler shutting down normally.");
1127     cupsdAddEvent(CUPSD_EVENT_SERVER_STOPPED, NULL, NULL,
1128                   "Scheduler shutting down normally.");
1129   }
1130   else
1131   {
1132     cupsdLogMessage(CUPSD_LOG_ERROR,
1133                     "Scheduler shutting down due to program error.");
1134     cupsdAddEvent(CUPSD_EVENT_SERVER_STOPPED, NULL, NULL,
1135                   "Scheduler shutting down due to program error.");
1136   }
1137
1138  /*
1139   * Close all network clients...
1140   */
1141
1142   DoingShutdown = 1;
1143
1144   cupsdStopServer();
1145
1146 #if defined(HAVE_ONDEMAND)
1147  /*
1148   * Update the keep-alive file as needed...
1149   */
1150
1151   if (OnDemand)
1152     service_checkout();
1153 #endif /* HAVE_ONDEMAND */
1154
1155  /*
1156   * Stop all jobs...
1157   */
1158
1159   cupsdFreeAllJobs();
1160
1161 #ifdef __APPLE__
1162  /*
1163   * Stop monitoring system event monitoring...
1164   */
1165
1166   if (use_sysman)
1167     cupsdStopSystemMonitor();
1168 #endif /* __APPLE__ */
1169
1170   cupsdStopSelect();
1171
1172   return (!stop_scheduler);
1173 }
1174
1175
1176 /*
1177  * 'cupsdAddString()' - Copy and add a string to an array.
1178  */
1179
1180 int                                     /* O  - 1 on success, 0 on failure */
1181 cupsdAddString(cups_array_t **a,        /* IO - String array */
1182                const char   *s)         /* I  - String to copy and add */
1183 {
1184   if (!*a)
1185     *a = cupsArrayNew3((cups_array_func_t)strcmp, NULL,
1186                        (cups_ahash_func_t)NULL, 0,
1187                        (cups_acopy_func_t)strdup,
1188                        (cups_afree_func_t)free);
1189
1190   return (cupsArrayAdd(*a, (char *)s));
1191 }
1192
1193
1194 /*
1195  * 'cupsdCheckProcess()' - Tell the main loop to check for dead children.
1196  */
1197
1198 void
1199 cupsdCheckProcess(void)
1200 {
1201  /*
1202   * Flag that we have dead children...
1203   */
1204
1205   dead_children = 1;
1206 }
1207
1208
1209 /*
1210  * 'cupsdClearString()' - Clear a string.
1211  */
1212
1213 void
1214 cupsdClearString(char **s)              /* O - String value */
1215 {
1216   if (s && *s)
1217   {
1218     free(*s);
1219     *s = NULL;
1220   }
1221 }
1222
1223
1224 /*
1225  * 'cupsdFreeStrings()' - Free an array of strings.
1226  */
1227
1228 void
1229 cupsdFreeStrings(cups_array_t **a)      /* IO - String array */
1230 {
1231   if (*a)
1232   {
1233     cupsArrayDelete(*a);
1234     *a = NULL;
1235   }
1236 }
1237
1238
1239 /*
1240  * 'cupsdHoldSignals()' - Hold child and termination signals.
1241  */
1242
1243 void
1244 cupsdHoldSignals(void)
1245 {
1246 #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
1247   sigset_t              newmask;        /* New POSIX signal mask */
1248 #endif /* HAVE_SIGACTION && !HAVE_SIGSET */
1249
1250
1251   holdcount ++;
1252   if (holdcount > 1)
1253     return;
1254
1255 #ifdef HAVE_SIGSET
1256   sighold(SIGTERM);
1257   sighold(SIGCHLD);
1258 #elif defined(HAVE_SIGACTION)
1259   sigemptyset(&newmask);
1260   sigaddset(&newmask, SIGTERM);
1261   sigaddset(&newmask, SIGCHLD);
1262   sigprocmask(SIG_BLOCK, &newmask, &holdmask);
1263 #endif /* HAVE_SIGSET */
1264 }
1265
1266
1267 /*
1268  * 'cupsdReleaseSignals()' - Release signals for delivery.
1269  */
1270
1271 void
1272 cupsdReleaseSignals(void)
1273 {
1274   holdcount --;
1275   if (holdcount > 0)
1276     return;
1277
1278 #ifdef HAVE_SIGSET
1279   sigrelse(SIGTERM);
1280   sigrelse(SIGCHLD);
1281 #elif defined(HAVE_SIGACTION)
1282   sigprocmask(SIG_SETMASK, &holdmask, NULL);
1283 #endif /* HAVE_SIGSET */
1284 }
1285
1286
1287 /*
1288  * 'cupsdSetString()' - Set a string value.
1289  */
1290
1291 void
1292 cupsdSetString(char       **s,          /* O - New string */
1293                const char *v)           /* I - String value */
1294 {
1295   if (!s || *s == v)
1296     return;
1297
1298   if (*s)
1299     free(*s);
1300
1301   if (v)
1302     *s = strdup(v);
1303   else
1304     *s = NULL;
1305 }
1306
1307
1308 /*
1309  * 'cupsdSetStringf()' - Set a formatted string value.
1310  */
1311
1312 void
1313 cupsdSetStringf(char       **s,         /* O - New string */
1314                 const char *f,          /* I - Printf-style format string */
1315                 ...)                    /* I - Additional args as needed */
1316 {
1317   char          v[65536 + 64];          /* Formatting string value */
1318   va_list       ap;                     /* Argument pointer */
1319   char          *olds;                  /* Old string */
1320
1321
1322   if (!s)
1323     return;
1324
1325   olds = *s;
1326
1327   if (f)
1328   {
1329     va_start(ap, f);
1330     vsnprintf(v, sizeof(v), f, ap);
1331     va_end(ap);
1332
1333     *s = strdup(v);
1334   }
1335   else
1336     *s = NULL;
1337
1338   if (olds)
1339     free(olds);
1340 }
1341
1342
1343 /*
1344  * 'parent_handler()' - Catch USR1/CHLD signals...
1345  */
1346
1347 static void
1348 parent_handler(int sig)                 /* I - Signal */
1349 {
1350  /*
1351   * Store the signal we got from the OS and return...
1352   */
1353
1354   parent_signal = sig;
1355 }
1356
1357
1358 /*
1359  * 'process_children()' - Process all dead children...
1360  */
1361
1362 static void
1363 process_children(void)
1364 {
1365   int           status;                 /* Exit status of child */
1366   int           pid,                    /* Process ID of child */
1367                 job_id;                 /* Job ID of child */
1368   cupsd_job_t   *job;                   /* Current job */
1369   int           i;                      /* Looping var */
1370   char          name[1024];             /* Process name */
1371   const char    *type;                  /* Type of program */
1372
1373
1374   cupsdLogMessage(CUPSD_LOG_DEBUG2, "process_children()");
1375
1376  /*
1377   * Reset the dead_children flag...
1378   */
1379
1380   dead_children = 0;
1381
1382  /*
1383   * Collect the exit status of some children...
1384   */
1385
1386 #ifdef HAVE_WAITPID
1387   while ((pid = waitpid(-1, &status, WNOHANG)) > 0)
1388 #elif defined(HAVE_WAIT3)
1389   while ((pid = wait3(&status, WNOHANG, NULL)) > 0)
1390 #else
1391   if ((pid = wait(&status)) > 0)
1392 #endif /* HAVE_WAITPID */
1393   {
1394    /*
1395     * Collect the name of the process that finished...
1396     */
1397
1398     cupsdFinishProcess(pid, name, sizeof(name), &job_id);
1399
1400    /*
1401     * Delete certificates for CGI processes...
1402     */
1403
1404     if (pid)
1405       cupsdDeleteCert(pid);
1406
1407    /*
1408     * Handle completed job filters...
1409     */
1410
1411     if (job_id > 0)
1412       job = cupsdFindJob(job_id);
1413     else
1414       job  = NULL;
1415
1416     if (job)
1417     {
1418       for (i = 0; job->filters[i]; i ++)
1419         if (job->filters[i] == pid)
1420           break;
1421
1422       if (job->filters[i] || job->backend == pid)
1423       {
1424        /*
1425         * OK, this process has gone away; what's left?
1426         */
1427
1428         if (job->filters[i])
1429         {
1430           job->filters[i] = -pid;
1431           type            = "Filter";
1432         }
1433         else
1434         {
1435           job->backend = -pid;
1436           type         = "Backend";
1437         }
1438
1439         if (status && status != SIGTERM && status != SIGKILL &&
1440             status != SIGPIPE)
1441         {
1442          /*
1443           * An error occurred; save the exit status so we know to stop
1444           * the printer or cancel the job when all of the filters finish...
1445           *
1446           * A negative status indicates that the backend failed and the
1447           * printer needs to be stopped.
1448           *
1449           * In order to preserve the most serious status, we always log
1450           * when a process dies due to a signal (e.g. SIGABRT, SIGSEGV,
1451           * and SIGBUS) and prefer to log the backend exit status over a
1452           * filter's.
1453           */
1454
1455           int old_status = abs(job->status);
1456
1457           if (WIFSIGNALED(status) ||    /* This process crashed, or */
1458               !job->status ||           /* No process had a status, or */
1459               (!job->filters[i] && WIFEXITED(old_status)))
1460           {                             /* Backend and filter didn't crash */
1461             if (job->filters[i])
1462               job->status = status;     /* Filter failed */
1463             else
1464               job->status = -status;    /* Backend failed */
1465           }
1466
1467           if (job->state_value == IPP_JOB_PROCESSING &&
1468               job->status_level > CUPSD_LOG_ERROR &&
1469               (job->filters[i] || !WIFEXITED(status)))
1470           {
1471             char        message[1024];  /* New printer-state-message */
1472
1473
1474             job->status_level = CUPSD_LOG_ERROR;
1475
1476             snprintf(message, sizeof(message), "%s failed", type);
1477
1478             if (job->printer)
1479             {
1480               strlcpy(job->printer->state_message, message,
1481                        sizeof(job->printer->state_message));
1482             }
1483
1484             if (!job->attrs)
1485               cupsdLoadJob(job);
1486
1487             if (!job->printer_message && job->attrs)
1488             {
1489               if ((job->printer_message =
1490                        ippFindAttribute(job->attrs, "job-printer-state-message",
1491                                         IPP_TAG_TEXT)) == NULL)
1492                 job->printer_message = ippAddString(job->attrs, IPP_TAG_JOB,
1493                                                     IPP_TAG_TEXT,
1494                                                     "job-printer-state-message",
1495                                                     NULL, NULL);
1496             }
1497
1498             if (job->printer_message)
1499               ippSetString(job->attrs, &job->printer_message, 0, message);
1500           }
1501         }
1502
1503        /*
1504         * If this is not the last file in a job, see if all of the
1505         * filters are done, and if so move to the next file.
1506         */
1507
1508         if (job->state_value >= IPP_JOB_CANCELED)
1509         {
1510          /*
1511           * Remove the job from the active list if there are no processes still
1512           * running for it...
1513           */
1514
1515           for (i = 0; job->filters[i] < 0; i++);
1516
1517           if (!job->filters[i] && job->backend <= 0)
1518             cupsArrayRemove(ActiveJobs, job);
1519         }
1520         else if (job->current_file < job->num_files && job->printer)
1521         {
1522           for (i = 0; job->filters[i] < 0; i ++);
1523
1524           if (!job->filters[i] &&
1525               (!job->printer->pc || !job->printer->pc->single_file ||
1526                job->backend <= 0))
1527           {
1528            /*
1529             * Process the next file...
1530             */
1531
1532             cupsdContinueJob(job);
1533           }
1534         }
1535       }
1536     }
1537
1538    /*
1539     * Show the exit status as needed, ignoring SIGTERM and SIGKILL errors
1540     * since they come when we kill/end a process...
1541     */
1542
1543     if (status == SIGTERM || status == SIGKILL)
1544     {
1545       cupsdLogJob(job, CUPSD_LOG_DEBUG,
1546                   "PID %d (%s) was terminated normally with signal %d.", pid,
1547                   name, status);
1548     }
1549     else if (status == SIGPIPE)
1550     {
1551       cupsdLogJob(job, CUPSD_LOG_DEBUG,
1552                   "PID %d (%s) did not catch or ignore signal %d.", pid, name,
1553                   status);
1554     }
1555     else if (status)
1556     {
1557       if (WIFEXITED(status))
1558       {
1559         int code = WEXITSTATUS(status); /* Exit code */
1560
1561         if (code > 100)
1562           cupsdLogJob(job, CUPSD_LOG_DEBUG,
1563                       "PID %d (%s) stopped with status %d (%s)", pid, name,
1564                       code, strerror(code - 100));
1565         else
1566           cupsdLogJob(job, CUPSD_LOG_DEBUG,
1567                       "PID %d (%s) stopped with status %d.", pid, name, code);
1568       }
1569       else
1570         cupsdLogJob(job, CUPSD_LOG_DEBUG, "PID %d (%s) crashed on signal %d.",
1571                     pid, name, WTERMSIG(status));
1572
1573       if (LogLevel < CUPSD_LOG_DEBUG)
1574         cupsdLogJob(job, CUPSD_LOG_INFO,
1575                     "Hint: Try setting the LogLevel to \"debug\" to find out "
1576                     "more.");
1577     }
1578     else
1579       cupsdLogJob(job, CUPSD_LOG_DEBUG, "PID %d (%s) exited with no errors.",
1580                   pid, name);
1581   }
1582
1583  /*
1584   * If wait*() is interrupted by a signal, tell main() to call us again...
1585   */
1586
1587   if (pid < 0 && errno == EINTR)
1588     dead_children = 1;
1589 }
1590
1591
1592 /*
1593  * 'select_timeout()' - Calculate the select timeout value.
1594  *
1595  */
1596
1597 static long                             /* O - Number of seconds */
1598 select_timeout(int fds)                 /* I - Number of descriptors returned */
1599 {
1600   long                  timeout;        /* Timeout for select */
1601   time_t                now;            /* Current time */
1602   cupsd_client_t        *con;           /* Client information */
1603   cupsd_job_t           *job;           /* Job information */
1604   const char            *why;           /* Debugging aid */
1605
1606
1607   cupsdLogMessage(CUPSD_LOG_DEBUG2, "select_timeout: JobHistoryUpdate=%ld",
1608                   (long)JobHistoryUpdate);
1609
1610  /*
1611   * Check to see if any of the clients have pending data to be
1612   * processed; if so, the timeout should be 0...
1613   */
1614
1615   for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
1616        con;
1617        con = (cupsd_client_t *)cupsArrayNext(Clients))
1618     if (httpGetReady(con->http))
1619       return (0);
1620
1621  /*
1622   * If select has been active in the last second (fds > 0) or we have
1623   * many resources in use then don't bother trying to optimize the
1624   * timeout, just make it 1 second.
1625   */
1626
1627   if (fds > 0 || cupsArrayCount(Clients) > 50)
1628     return (1);
1629
1630  /*
1631   * Otherwise, check all of the possible events that we need to wake for...
1632   */
1633
1634   now     = time(NULL);
1635   timeout = now + 86400;                /* 86400 == 1 day */
1636   why     = "do nothing";
1637
1638 #ifdef __APPLE__
1639  /*
1640   * When going to sleep, wake up to cancel jobs that don't complete in time.
1641   */
1642
1643   if (SleepJobs > 0 && SleepJobs < timeout)
1644   {
1645     timeout = SleepJobs;
1646     why     = "cancel jobs before sleeping";
1647   }
1648 #endif /* __APPLE__ */
1649
1650  /*
1651   * Check whether we are accepting new connections...
1652   */
1653
1654   if (ListeningPaused > 0 && cupsArrayCount(Clients) < MaxClients &&
1655       ListeningPaused < timeout)
1656   {
1657     if (ListeningPaused <= now)
1658       timeout = now;
1659     else
1660       timeout = ListeningPaused;
1661
1662     why = "resume listening";
1663   }
1664
1665  /*
1666   * Check the activity and close old clients...
1667   */
1668
1669   for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
1670        con;
1671        con = (cupsd_client_t *)cupsArrayNext(Clients))
1672     if ((httpGetActivity(con->http) + Timeout) < timeout)
1673     {
1674       timeout = httpGetActivity(con->http) + Timeout;
1675       why     = "timeout a client connection";
1676     }
1677
1678  /*
1679   * Write out changes to configuration and state files...
1680   */
1681
1682   if (DirtyCleanTime && timeout > DirtyCleanTime)
1683   {
1684     timeout = DirtyCleanTime;
1685     why     = "write dirty config/state files";
1686   }
1687
1688  /*
1689   * Check for any job activity...
1690   */
1691
1692   if (JobHistoryUpdate && timeout > JobHistoryUpdate)
1693   {
1694     timeout = JobHistoryUpdate;
1695     why     = "update job history";
1696   }
1697
1698   for (job = (cupsd_job_t *)cupsArrayFirst(ActiveJobs);
1699        job;
1700        job = (cupsd_job_t *)cupsArrayNext(ActiveJobs))
1701   {
1702     if (job->cancel_time && job->cancel_time < timeout)
1703     {
1704       timeout = job->cancel_time;
1705       why     = "cancel stuck jobs";
1706     }
1707
1708     if (job->kill_time && job->kill_time < timeout)
1709     {
1710       timeout = job->kill_time;
1711       why     = "kill unresponsive jobs";
1712     }
1713
1714     if (job->state_value == IPP_JOB_HELD && job->hold_until < timeout)
1715     {
1716       timeout = job->hold_until;
1717       why     = "release held jobs";
1718     }
1719
1720     if (job->state_value == IPP_JOB_PENDING && timeout > (now + 10))
1721     {
1722       timeout = now + 10;
1723       why     = "start pending jobs";
1724       break;
1725     }
1726   }
1727
1728 #ifdef HAVE_MALLINFO
1729  /*
1730   * Log memory usage every minute...
1731   */
1732
1733   if (LogLevel >= CUPSD_LOG_DEBUG && (mallinfo_time + 60) < timeout)
1734   {
1735     timeout = mallinfo_time + 60;
1736     why     = "display memory usage";
1737   }
1738 #endif /* HAVE_MALLINFO */
1739
1740  /*
1741   * Adjust from absolute to relative time.  We add 1 second to the timeout since
1742   * events occur after the timeout expires, and limit the timeout to 86400
1743   * seconds (1 day) to avoid select() timeout limits present on some operating
1744   * systems...
1745   */
1746
1747   timeout = timeout - now + 1;
1748
1749   if (timeout < 1)
1750     timeout = 1;
1751   else if (timeout > 86400)
1752     timeout = 86400;
1753
1754  /*
1755   * Log and return the timeout value...
1756   */
1757
1758   cupsdLogMessage(CUPSD_LOG_DEBUG2, "select_timeout(%d): %ld seconds to %s",
1759                   fds, timeout, why);
1760
1761   return (timeout);
1762 }
1763
1764
1765 /*
1766  * 'sigchld_handler()' - Handle 'child' signals from old processes.
1767  */
1768
1769 static void
1770 sigchld_handler(int sig)                /* I - Signal number */
1771 {
1772   (void)sig;
1773
1774  /*
1775   * Flag that we have dead children...
1776   */
1777
1778   dead_children = 1;
1779
1780  /*
1781   * Reset the signal handler as needed...
1782   */
1783
1784 #if !defined(HAVE_SIGSET) && !defined(HAVE_SIGACTION)
1785   signal(SIGCLD, sigchld_handler);
1786 #endif /* !HAVE_SIGSET && !HAVE_SIGACTION */
1787 }
1788
1789
1790 /*
1791  * 'sighup_handler()' - Handle 'hangup' signals to reconfigure the scheduler.
1792  */
1793
1794 static void
1795 sighup_handler(int sig)                 /* I - Signal number */
1796 {
1797   (void)sig;
1798
1799   NeedReload = RELOAD_ALL;
1800   ReloadTime = time(NULL);
1801
1802 #if !defined(HAVE_SIGSET) && !defined(HAVE_SIGACTION)
1803   signal(SIGHUP, sighup_handler);
1804 #endif /* !HAVE_SIGSET && !HAVE_SIGACTION */
1805 }
1806
1807
1808 /*
1809  * 'sigterm_handler()' - Handle 'terminate' signals that stop the scheduler.
1810  */
1811
1812 static void
1813 sigterm_handler(int sig)                /* I - Signal number */
1814 {
1815   (void)sig;    /* remove compiler warnings... */
1816
1817  /*
1818   * Flag that we should stop and return...
1819   */
1820
1821   stop_scheduler = 1;
1822 }
1823
1824
1825 #if defined(HAVE_ONDEMAND)
1826 /*
1827  * 'service_checkin()' - Check-in with launchd and collect the listening fds.
1828  */
1829
1830 static void
1831 service_checkin(void)
1832 {
1833 #  ifdef HAVE_LAUNCH_ACTIVATE_SOCKET
1834   int                   error;          /* Check-in error, if any */
1835   size_t                i,              /* Looping var */
1836                         count;          /* Number of listeners */
1837   int                   *ld_sockets;    /* Listener sockets */
1838   cupsd_listener_t      *lis;           /* Listeners array */
1839   http_addr_t           addr;           /* Address variable */
1840   socklen_t             addrlen;        /* Length of address */
1841   char                  s[256];         /* String addresss */
1842
1843
1844   cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: pid=%d", (int)getpid());
1845
1846  /*
1847   * Check-in with launchd...
1848   */
1849
1850   if ((error = launch_activate_socket("Listeners", &ld_sockets, &count)) != 0)
1851   {
1852     cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Unable to get listener sockets: %s", strerror(error));
1853     exit(EXIT_FAILURE);
1854     return; /* anti-compiler-warning */
1855   }
1856
1857  /*
1858   * Try to match the launchd sockets to the cupsd listeners...
1859   */
1860
1861   cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: %d listeners.", (int)count);
1862
1863   for (i = 0; i < count; i ++)
1864   {
1865    /*
1866     * Get the launchd socket address...
1867     */
1868
1869     addrlen = sizeof(addr);
1870
1871     if (getsockname(ld_sockets[i], (struct sockaddr *)&addr, &addrlen))
1872     {
1873       cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Unable to get local address for listener #%d: %s", (int)i + 1, strerror(errno));
1874       continue;
1875     }
1876
1877     cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: Listener #%d at fd %d, \"%s\".", (int)i + 1, ld_sockets[i], httpAddrString(&addr, s, sizeof(s)));
1878
1879     for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
1880          lis;
1881          lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
1882       if (httpAddrEqual(&lis->address, &addr))
1883         break;
1884
1885    /*
1886     * Add a new listener if there's no match...
1887     */
1888
1889     if (lis)
1890     {
1891       cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: Matched existing listener #%d to %s.", (int)i + 1, httpAddrString(&(lis->address), s, sizeof(s)));
1892     }
1893     else
1894     {
1895       cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: Adding new listener #%d for %s.", (int)i + 1, httpAddrString(&addr, s, sizeof(s)));
1896
1897       if ((lis = calloc(1, sizeof(cupsd_listener_t))) == NULL)
1898       {
1899         cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Unable to allocate listener: %s", strerror(errno));
1900         exit(EXIT_FAILURE);
1901       }
1902
1903       cupsArrayAdd(Listeners, lis);
1904
1905       memcpy(&lis->address, &addr, sizeof(lis->address));
1906     }
1907
1908     lis->fd        = ld_sockets[i];
1909     lis->on_demand = 1;
1910
1911 #    ifdef HAVE_SSL
1912     if (httpAddrPort(&(lis->address)) == 443)
1913       lis->encryption = HTTP_ENCRYPT_ALWAYS;
1914 #    endif /* HAVE_SSL */
1915   }
1916
1917   free(ld_sockets);
1918
1919 #  elif defined(HAVE_LAUNCHD)
1920   size_t                i,              /* Looping var */
1921                         count;          /* Number of listeners */
1922   launch_data_t         ld_msg,         /* Launch data message */
1923                         ld_resp,        /* Launch data response */
1924                         ld_array,       /* Launch data array */
1925                         ld_sockets,     /* Launch data sockets dictionary */
1926                         tmp;            /* Launch data */
1927   cupsd_listener_t      *lis;           /* Listeners array */
1928   http_addr_t           addr;           /* Address variable */
1929   socklen_t             addrlen;        /* Length of address */
1930   int                   fd;             /* File descriptor */
1931   char                  s[256];         /* String addresss */
1932
1933
1934   cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: pid=%d", (int)getpid());
1935
1936  /*
1937   * Check-in with launchd...
1938   */
1939
1940   ld_msg = launch_data_new_string(LAUNCH_KEY_CHECKIN);
1941   if ((ld_resp = launch_msg(ld_msg)) == NULL)
1942   {
1943     cupsdLogMessage(CUPSD_LOG_ERROR,
1944                     "service_checkin: launch_msg(\"" LAUNCH_KEY_CHECKIN
1945                     "\") IPC failure");
1946     exit(EXIT_FAILURE);
1947     return; /* anti-compiler-warning */
1948   }
1949
1950   if (launch_data_get_type(ld_resp) == LAUNCH_DATA_ERRNO)
1951   {
1952     errno = launch_data_get_errno(ld_resp);
1953     cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Check-in failed: %s",
1954                     strerror(errno));
1955     exit(EXIT_FAILURE);
1956     return; /* anti-compiler-warning */
1957   }
1958
1959  /*
1960   * Get the sockets dictionary...
1961   */
1962
1963   if ((ld_sockets = launch_data_dict_lookup(ld_resp, LAUNCH_JOBKEY_SOCKETS))
1964           == NULL)
1965   {
1966     cupsdLogMessage(CUPSD_LOG_ERROR,
1967                     "service_checkin: No sockets found to answer requests on.");
1968     exit(EXIT_FAILURE);
1969     return; /* anti-compiler-warning */
1970   }
1971
1972  /*
1973   * Get the array of listener sockets...
1974   */
1975
1976   if ((ld_array = launch_data_dict_lookup(ld_sockets, "Listeners")) == NULL)
1977   {
1978     cupsdLogMessage(CUPSD_LOG_ERROR,
1979                     "service_checkin: No sockets found to answer requests on.");
1980     exit(EXIT_FAILURE);
1981     return; /* anti-compiler-warning */
1982   }
1983
1984  /*
1985   * Add listening fd(s) to the Listener array...
1986   */
1987
1988   if (launch_data_get_type(ld_array) == LAUNCH_DATA_ARRAY)
1989   {
1990     count = launch_data_array_get_count(ld_array);
1991
1992     cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: %d listeners.", (int)count);
1993
1994     for (i = 0; i < count; i ++)
1995     {
1996      /*
1997       * Get the launchd file descriptor and address...
1998       */
1999
2000       if ((tmp = launch_data_array_get_index(ld_array, i)) != NULL)
2001       {
2002         fd      = launch_data_get_fd(tmp);
2003         addrlen = sizeof(addr);
2004
2005         if (getsockname(fd, (struct sockaddr *)&addr, &addrlen))
2006         {
2007           cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Unable to get local address for listener #%d: %s", (int)i + 1, strerror(errno));
2008           continue;
2009         }
2010
2011         cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: Listener #%d at fd %d, \"%s\".", (int)i + 1, fd, httpAddrString(&addr, s, sizeof(s)));
2012
2013        /*
2014         * Try to match the launchd socket address to one of the listeners...
2015         */
2016
2017         for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
2018              lis;
2019              lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
2020           if (httpAddrEqual(&lis->address, &addr))
2021             break;
2022
2023        /*
2024         * Add a new listener If there's no match...
2025         */
2026
2027         if (lis)
2028         {
2029           cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: Matched existing listener #%d to %s.", (int)i + 1, httpAddrString(&(lis->address), s, sizeof(s)));
2030         }
2031         else
2032         {
2033           cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: Adding new listener #%d for %s.", (int)i + 1, httpAddrString(&addr, s, sizeof(s)));
2034
2035           if ((lis = calloc(1, sizeof(cupsd_listener_t))) == NULL)
2036           {
2037             cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Unable to allocate listener: %s.", strerror(errno));
2038             exit(EXIT_FAILURE);
2039           }
2040
2041           cupsArrayAdd(Listeners, lis);
2042
2043           memcpy(&lis->address, &addr, sizeof(lis->address));
2044         }
2045
2046         lis->fd        = fd;
2047         lis->on_demand = 1;
2048
2049 #    ifdef HAVE_SSL
2050         if (httpAddrPort(&(lis->address)) == 443)
2051           lis->encryption = HTTP_ENCRYPT_ALWAYS;
2052 #    endif /* HAVE_SSL */
2053       }
2054     }
2055   }
2056
2057   launch_data_free(ld_msg);
2058   launch_data_free(ld_resp);
2059
2060 #  else /* HAVE_SYSTEMD */
2061   int                   i,              /* Looping var */
2062                         count;          /* Number of listeners */
2063   cupsd_listener_t      *lis;           /* Listeners array */
2064   http_addr_t           addr;           /* Address variable */
2065   socklen_t             addrlen;        /* Length of address */
2066   char                  s[256];         /* String addresss */
2067
2068
2069   cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: pid=%d", (int)getpid());
2070
2071  /*
2072   * Check-in with systemd...
2073   */
2074
2075   if ((count = sd_listen_fds(0)) < 0)
2076   {
2077     cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Unable to get listener sockets: %s", strerror(-count));
2078     exit(EXIT_FAILURE);
2079     return; /* anti-compiler-warning */
2080   }
2081
2082  /*
2083   * Try to match the systemd sockets to the cupsd listeners...
2084   */
2085
2086   cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: %d listeners.", count);
2087
2088   for (i = 0; i < count; i ++)
2089   {
2090    /*
2091     * Get the launchd socket address...
2092     */
2093
2094     addrlen = sizeof(addr);
2095
2096     if (getsockname(SD_LISTEN_FDS_START + i, (struct sockaddr *)&addr, &addrlen))
2097     {
2098       cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Unable to get local address for listener #%d: %s", (int)i + 1, strerror(errno));
2099       continue;
2100     }
2101
2102     cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: Listener #%d at fd %d, \"%s\".", (int)i + 1, SD_LISTEN_FDS_START + i, httpAddrString(&addr, s, sizeof(s)));
2103
2104     for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
2105          lis;
2106          lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
2107       if (httpAddrEqual(&lis->address, &addr))
2108         break;
2109
2110    /*
2111     * Add a new listener if there's no match...
2112     */
2113
2114     if (lis)
2115     {
2116       cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: Matched existing listener #%d to %s.", (int)i + 1, httpAddrString(&(lis->address), s, sizeof(s)));
2117     }
2118     else
2119     {
2120       cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: Adding new listener #%d for %s.", (int)i + 1, httpAddrString(&addr, s, sizeof(s)));
2121
2122       if ((lis = calloc(1, sizeof(cupsd_listener_t))) == NULL)
2123       {
2124         cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Unable to allocate listener: %s", strerror(errno));
2125         exit(EXIT_FAILURE);
2126       }
2127
2128       cupsArrayAdd(Listeners, lis);
2129
2130       memcpy(&lis->address, &addr, sizeof(lis->address));
2131     }
2132
2133     lis->fd        = SD_LISTEN_FDS_START + i;
2134     lis->on_demand = 1;
2135
2136 #    ifdef HAVE_SSL
2137     if (httpAddrPort(&(lis->address)) == 443)
2138       lis->encryption = HTTP_ENCRYPT_ALWAYS;
2139 #    endif /* HAVE_SSL */
2140   }
2141 #  endif /* HAVE_LAUNCH_ACTIVATE_SOCKET */
2142 }
2143
2144
2145 /*
2146  * 'service_checkout()' - Update the CUPS_KEEPALIVE file as needed.
2147  */
2148
2149 static void
2150 service_checkout(void)
2151 {
2152   int   fd;                             /* File descriptor */
2153
2154
2155  /*
2156   * Create or remove the "keep-alive" file based on whether there are active
2157   * jobs or shared printers to advertise...
2158   */
2159
2160   if (cupsArrayCount(ActiveJobs) ||     /* Active jobs */
2161       WebInterface ||                   /* Web interface enabled */
2162       (Browsing && BrowseLocalProtocols && cupsArrayCount(Printers)))
2163                                         /* Printers being shared */
2164   {
2165     cupsdLogMessage(CUPSD_LOG_DEBUG, "Creating keep-alive file \"" CUPS_KEEPALIVE "\".");
2166
2167     if ((fd = open(CUPS_KEEPALIVE, O_RDONLY | O_CREAT | O_EXCL, S_IRUSR)) >= 0)
2168       close(fd);
2169   }
2170   else
2171   {
2172     cupsdLogMessage(CUPSD_LOG_DEBUG, "Removing keep-alive file \"" CUPS_KEEPALIVE "\".");
2173
2174     unlink(CUPS_KEEPALIVE);
2175   }
2176 }
2177 #endif /* HAVE_ONDEMAND */
2178
2179
2180 /*
2181  * 'usage()' - Show scheduler usage.
2182  */
2183
2184 static void
2185 usage(int status)                       /* O - Exit status */
2186 {
2187   FILE  *fp = status ? stderr : stdout; /* Output file */
2188
2189
2190   _cupsLangPuts(fp, _("Usage: cupsd [options]"));
2191   _cupsLangPuts(fp, _("Options:"));
2192   _cupsLangPuts(fp, _("  -c cupsd.conf           Set cupsd.conf file to use."));
2193   _cupsLangPuts(fp, _("  -f                      Run in the foreground."));
2194   _cupsLangPuts(fp, _("  -F                      Run in the foreground but detach from console."));
2195   _cupsLangPuts(fp, _("  -h                      Show this usage message."));
2196   _cupsLangPuts(fp, _("  -l                      Run cupsd on demand."));
2197   _cupsLangPuts(fp, _("  -s cups-files.conf      Set cups-files.conf file to use."));
2198   _cupsLangPuts(fp, _("  -t                      Test the configuration file."));
2199
2200   exit(status);
2201 }