2 * Main loop for the CUPS scheduler.
4 * Copyright © 2007-2019 by Apple Inc.
5 * Copyright © 1997-2007 by Easy Software Products, all rights reserved.
7 * Licensed under Apache License v2.0. See the file "LICENSE" for more
12 * Include necessary headers...
17 #include <sys/resource.h>
20 # include <pthread/qos.h>
21 #endif /* __APPLE__ */
24 #elif defined(HAVE_SYSTEMD_SD_JOURNAL_H)
25 # define SD_JOURNAL_SUPPRESS_LOCATION
26 # include <systemd/sd-journal.h>
27 #endif /* HAVE_ASL_H */
33 #endif /* HAVE_LAUNCH_H */
36 # include <systemd/sd-daemon.h>
37 #endif /* HAVE_SYSTEMD */
40 # define CUPS_KEEPALIVE CUPS_CACHEDIR "/org.cups.cupsd"
41 /* Name of the KeepAlive file */
42 #endif /* HAVE_ONDEMAND */
44 #if defined(HAVE_MALLOC_H) && defined(HAVE_MALLINFO)
46 #endif /* HAVE_MALLOC_H && HAVE_MALLINFO */
50 #endif /* HAVE_NOTIFY_H */
53 # include <dbus/dbus.h>
54 #endif /* HAVE_DBUS */
56 #ifdef HAVE_SYS_PARAM_H
57 # include <sys/param.h>
58 #endif /* HAVE_SYS_PARAM_H */
65 static void parent_handler(int sig
);
66 static void process_children(void);
67 static void sigchld_handler(int sig
);
68 static void sighup_handler(int sig
);
69 static void sigterm_handler(int sig
);
70 static long select_timeout(int fds
);
71 static void service_checkin(void);
72 static void service_checkout(int shutdown
);
73 static void usage(int status
) _CUPS_NORETURN
;
80 static int parent_signal
= 0;
81 /* Set to signal number from child */
82 static int holdcount
= 0; /* Number of times "hold" was called */
83 #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
84 static sigset_t holdmask
; /* Old POSIX signal mask */
85 #endif /* HAVE_SIGACTION && !HAVE_SIGSET */
86 static int dead_children
= 0;
88 static int stop_scheduler
= 0;
89 /* Should the scheduler stop? */
90 static time_t local_timeout
= 0;
91 /* Next local printer timeout */
95 * 'main()' - Main entry for the CUPS scheduler.
98 int /* O - Exit status */
99 main(int argc
, /* I - Number of command-line args */
100 char *argv
[]) /* I - Command-line arguments */
102 int i
; /* Looping var */
103 char *opt
; /* Option character */
104 int close_all
= 1, /* Close all file descriptors? */
105 disconnect
= 1, /* Disconnect from controlling terminal? */
106 fg
= 0, /* Run in foreground? */
108 /* Running as child process? */
110 /* Print the sandbox profile to stdout? */
111 int fds
; /* Number of ready descriptors */
112 cupsd_client_t
*con
; /* Current client */
113 cupsd_job_t
*job
; /* Current job */
114 cupsd_listener_t
*lis
; /* Current listener */
115 time_t current_time
, /* Current time */
116 activity
, /* Client activity timer */
117 senddoc_time
, /* Send-Document time */
118 expire_time
, /* Subscription expire time */
119 report_time
, /* Malloc/client/job report time */
120 event_time
; /* Last event notification time */
121 long timeout
; /* Timeout for cupsdDoSelect() */
122 struct rlimit limit
; /* Runtime limit */
123 #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
124 struct sigaction action
; /* Actions for POSIX signals */
125 #endif /* HAVE_SIGACTION && !HAVE_SIGSET */
127 int use_sysman
= 1; /* Use system management functions? */
129 time_t netif_time
= 0; /* Time since last network update */
130 #endif /* __APPLE__ */
131 #if defined(HAVE_ONDEMAND)
132 int service_idle_exit
= 0;
133 /* Idle exit on select timeout? */
134 #endif /* HAVE_ONDEMAND */
139 * Check for setuid invocation, which we do not support!
142 if (getuid() != geteuid())
144 fputs("cupsd: Cannot run as a setuid program.\n", stderr
);
147 #endif /* HAVE_GETEUID */
150 * Check for command-line arguments...
155 for (i
= 1; i
< argc
; i
++)
157 if (!strcmp(argv
[i
], "--help"))
159 else if (argv
[i
][0] == '-')
161 for (opt
= argv
[i
] + 1; *opt
!= '\0'; opt
++)
165 case 'C' : /* Run as child with config file */
170 case 'c' : /* Configuration file */
174 _cupsLangPuts(stderr
, _("cupsd: Expected config filename "
175 "after \"-c\" option."));
179 if (argv
[i
][0] == '/')
182 * Absolute directory...
185 cupsdSetString(&ConfigurationFile
, argv
[i
]);
190 * Relative directory...
193 char *current
; /* Current directory */
196 * Allocate a buffer for the current working directory to
197 * reduce run-time stack usage; this approximates the
198 * behavior of some implementations of getcwd() when they
199 * are passed a NULL pointer.
202 if ((current
= malloc(1024)) == NULL
)
204 _cupsLangPuts(stderr
,
205 _("cupsd: Unable to get current directory."));
209 if (!getcwd(current
, 1024))
211 _cupsLangPuts(stderr
,
212 _("cupsd: Unable to get current directory."));
217 cupsdSetStringf(&ConfigurationFile
, "%s/%s", current
, argv
[i
]);
222 case 'f' : /* Run in foreground... */
228 case 'F' : /* Run in foreground, but disconnect from terminal... */
233 case 'h' : /* Show usage/help */
237 case 'l' : /* Started by launchd/systemd/upstart... */
244 _cupsLangPuts(stderr
, _("cupsd: On-demand support not compiled "
245 "in, running in normal mode."));
249 #endif /* HAVE_ONDEMAND */
252 case 'p' : /* Stop immediately for profiling */
253 fputs("cupsd: -p (startup profiling) is for internal testing "
254 "use only!\n", stderr
);
261 case 'P' : /* Disable security profiles */
262 fputs("cupsd: -P (disable sandboxing) is for internal testing use only.\n", stderr
);
266 case 's' : /* Set cups-files.conf location */
270 _cupsLangPuts(stderr
, _("cupsd: Expected cups-files.conf "
271 "filename after \"-s\" option."));
275 if (argv
[i
][0] != '/')
278 * Relative filename not allowed...
281 _cupsLangPuts(stderr
, _("cupsd: Relative cups-files.conf "
282 "filename not allowed."));
286 cupsdSetString(&CupsFilesFile
, argv
[i
]);
290 case 'S' : /* Disable system management functions */
291 fputs("cupsd: -S (disable system management) for internal "
292 "testing use only!\n", stderr
);
295 #endif /* __APPLE__ */
297 case 't' : /* Test the cupsd.conf file... */
304 case 'T' : /* Print security profile */
311 default : /* Unknown option */
312 _cupsLangPrintf(stderr
, _("cupsd: Unknown option \"%c\" - "
321 _cupsLangPrintf(stderr
, _("cupsd: Unknown argument \"%s\" - aborting."),
327 if (!ConfigurationFile
)
328 cupsdSetString(&ConfigurationFile
, CUPS_SERVERROOT
"/cupsd.conf");
332 char *filename
, /* Copy of cupsd.conf filename */
333 *slash
; /* Final slash in cupsd.conf filename */
334 size_t len
; /* Size of buffer */
336 len
= strlen(ConfigurationFile
) + 15;
337 if ((filename
= malloc(len
)) == NULL
)
339 _cupsLangPrintf(stderr
,
340 _("cupsd: Unable to get path to "
341 "cups-files.conf file."));
345 strlcpy(filename
, ConfigurationFile
, len
);
346 if ((slash
= strrchr(filename
, '/')) == NULL
)
349 _cupsLangPrintf(stderr
,
350 _("cupsd: Unable to get path to "
351 "cups-files.conf file."));
355 strlcpy(slash
, "/cups-files.conf", len
- (size_t)(slash
- filename
));
356 cupsdSetString(&CupsFilesFile
, filename
);
363 * Make sure we aren't tying up any filesystems...
369 * Disconnect from the controlling terminal...
378 * Close all open files...
381 getrlimit(RLIMIT_NOFILE
, &limit
);
383 for (i
= 0; i
< (int)limit
.rlim_cur
&& i
< 1024; i
++)
387 * Redirect stdin/out/err to /dev/null...
390 if ((i
= open("/dev/null", O_RDONLY
)) != 0)
396 if ((i
= open("/dev/null", O_WRONLY
)) != 1)
402 if ((i
= open("/dev/null", O_WRONLY
)) != 2)
409 LogStderr
= cupsFileStderr();
412 * Run in the background as needed...
418 * Setup signal handlers for the parent...
421 #ifdef HAVE_SIGSET /* Use System V signals over POSIX to avoid bugs */
422 sigset(SIGUSR1
, parent_handler
);
423 sigset(SIGCHLD
, parent_handler
);
425 sigset(SIGHUP
, SIG_IGN
);
426 #elif defined(HAVE_SIGACTION)
427 memset(&action
, 0, sizeof(action
));
428 sigemptyset(&action
.sa_mask
);
429 sigaddset(&action
.sa_mask
, SIGUSR1
);
430 action
.sa_handler
= parent_handler
;
431 sigaction(SIGUSR1
, &action
, NULL
);
432 sigaction(SIGCHLD
, &action
, NULL
);
434 sigemptyset(&action
.sa_mask
);
435 action
.sa_handler
= SIG_IGN
;
436 sigaction(SIGHUP
, &action
, NULL
);
438 signal(SIGUSR1
, parent_handler
);
439 signal(SIGCLD
, parent_handler
);
441 signal(SIGHUP
, SIG_IGN
);
442 #endif /* HAVE_SIGSET */
447 * OK, wait for the child to startup and send us SIGUSR1 or to crash
448 * and the OS send us SIGCHLD... We also need to ignore SIGHUP which
449 * might be sent by the init script to restart the scheduler...
452 for (; parent_signal
== 0;)
455 if (parent_signal
== SIGUSR1
)
463 else if (WIFEXITED(i
))
465 fprintf(stderr
, "cupsd: Child exited with status %d\n",
471 fprintf(stderr
, "cupsd: Child exited on signal %d\n", WTERMSIG(i
));
476 #if defined(__OpenBSD__) && OpenBSD < 201211
478 * Call _thread_sys_closefrom() so the child process doesn't reset the
479 * parent's file descriptors to be blocking. This is a workaround for a
480 * limitation of userland libpthread on older versions of OpenBSD.
483 _thread_sys_closefrom(0);
484 #endif /* __OpenBSD__ && OpenBSD < 201211 */
487 * Since many system libraries create fork-unsafe data on execution of a
488 * program, we need to re-execute the background cupsd with the "-C" and "-s"
489 * options to avoid problems. Unfortunately, we also have to assume that
490 * argv[0] contains the name of the cupsd executable - there is no portable
491 * way to get the real pathname...
494 execlp(argv
[0], argv
[0], "-C", ConfigurationFile
, "-s", CupsFilesFile
, (char *)0);
499 * Let the system know we are busy while we bring up cupsd...
502 cupsdSetBusyState(1);
505 * Set the timezone info...
511 setlocale(LC_TIME
, "");
514 #ifdef HAVE_DBUS_THREADS_INIT
516 * Enable threading support for D-BUS...
519 dbus_threads_init_default();
520 #endif /* HAVE_DBUS_THREADS_INIT */
523 * Set the maximum number of files...
526 getrlimit(RLIMIT_NOFILE
, &limit
);
528 #if !defined(HAVE_POLL) && !defined(HAVE_EPOLL) && !defined(HAVE_KQUEUE)
529 if (limit
.rlim_max
> FD_SETSIZE
)
532 #endif /* !HAVE_POLL && !HAVE_EPOLL && !HAVE_KQUEUE */
534 if (limit
.rlim_max
== RLIM_INFINITY
)
537 #endif /* RLIM_INFINITY */
538 MaxFDs
= limit
.rlim_max
;
540 limit
.rlim_cur
= (rlim_t
)MaxFDs
;
542 setrlimit(RLIMIT_NOFILE
, &limit
);
547 * Read configuration...
550 if (!cupsdReadConfiguration())
552 else if (TestConfigFile
)
554 printf("\"%s\" is OK.\n", CupsFilesFile
);
555 printf("\"%s\" is OK.\n", ConfigurationFile
);
558 else if (print_profile
)
560 cups_file_t
*fp
; /* File pointer */
561 const char *profile
= cupsdCreateProfile(42, 0);
563 char line
[1024]; /* Line from file */
566 if ((fp
= cupsFileOpen(profile
, "r")) == NULL
)
568 printf("Unable to open profile file \"%s\": %s\n", profile
? profile
: "(null)", strerror(errno
));
572 while (cupsFileGets(fp
, line
, sizeof(line
)))
581 * Clean out old temp files and printer cache data.
584 if (!strncmp(TempDir
, RequestRoot
, strlen(RequestRoot
)))
585 cupsdCleanFiles(TempDir
, NULL
);
587 cupsdCleanFiles(CacheDir
, "*.ipp");
590 * If we were started on demand by launchd or systemd get the listen sockets
591 * file descriptors...
598 * Startup the server...
606 * Catch hangup and child signals and ignore broken pipes...
609 #ifdef HAVE_SIGSET /* Use System V signals over POSIX to avoid bugs */
610 sigset(SIGCHLD
, sigchld_handler
);
611 sigset(SIGHUP
, sighup_handler
);
612 sigset(SIGPIPE
, SIG_IGN
);
613 sigset(SIGTERM
, sigterm_handler
);
614 #elif defined(HAVE_SIGACTION)
615 memset(&action
, 0, sizeof(action
));
617 sigemptyset(&action
.sa_mask
);
618 sigaddset(&action
.sa_mask
, SIGTERM
);
619 sigaddset(&action
.sa_mask
, SIGCHLD
);
620 action
.sa_handler
= sigchld_handler
;
621 sigaction(SIGCHLD
, &action
, NULL
);
623 sigemptyset(&action
.sa_mask
);
624 sigaddset(&action
.sa_mask
, SIGHUP
);
625 action
.sa_handler
= sighup_handler
;
626 sigaction(SIGHUP
, &action
, NULL
);
628 sigemptyset(&action
.sa_mask
);
629 action
.sa_handler
= SIG_IGN
;
630 sigaction(SIGPIPE
, &action
, NULL
);
632 sigemptyset(&action
.sa_mask
);
633 sigaddset(&action
.sa_mask
, SIGTERM
);
634 sigaddset(&action
.sa_mask
, SIGCHLD
);
635 action
.sa_handler
= sigterm_handler
;
636 sigaction(SIGTERM
, &action
, NULL
);
638 signal(SIGCLD
, sigchld_handler
); /* No, SIGCLD isn't a typo... */
639 signal(SIGHUP
, sighup_handler
);
640 signal(SIGPIPE
, SIG_IGN
);
641 signal(SIGTERM
, sigterm_handler
);
642 #endif /* HAVE_SIGSET */
645 * Initialize authentication certificates...
651 * If we are running in the background, signal the parent process that
652 * we are up and running...
655 if (!fg
|| run_as_child
)
658 * Send a signal to the parent process, but only if the parent is
659 * not PID 1 (init). This avoids accidentally shutting down the
660 * system on OpenBSD if you CTRL-C the server before it is up...
663 i
= getppid(); /* Save parent PID to avoid race condition */
671 * Start power management framework...
675 cupsdStartSystemMonitor();
676 #endif /* __APPLE__ */
679 * Send server-started event...
684 cupsdAddEvent(CUPSD_EVENT_SERVER_STARTED
, NULL
, NULL
, "Scheduler started on demand.");
686 #endif /* HAVE_ONDEMAND */
688 cupsdAddEvent(CUPSD_EVENT_SERVER_STARTED
, NULL
, NULL
, "Scheduler started in foreground.");
690 cupsdAddEvent(CUPSD_EVENT_SERVER_STARTED
, NULL
, NULL
, "Scheduler started in background.");
692 cupsdSetBusyState(0);
695 * Start any pending print jobs...
704 current_time
= time(NULL
);
705 event_time
= current_time
;
706 expire_time
= current_time
;
710 senddoc_time
= current_time
;
712 while (!stop_scheduler
)
715 * Check if there are dead children to handle...
722 * Check if we need to load the server configuration file...
728 * Close any idle clients...
731 if (cupsArrayCount(Clients
) > 0)
733 for (con
= (cupsd_client_t
*)cupsArrayFirst(Clients
);
735 con
= (cupsd_client_t
*)cupsArrayNext(Clients
))
736 if (httpGetState(con
->http
) == HTTP_WAITING
)
737 cupsdCloseClient(con
);
739 con
->http
->keep_alive
= HTTP_KEEPALIVE_OFF
;
741 cupsdPauseListening();
745 * Restart if all clients are closed and all jobs finished, or
746 * if the reload timeout has elapsed...
749 if ((cupsArrayCount(Clients
) == 0 &&
750 (cupsArrayCount(PrintingJobs
) == 0 || NeedReload
!= RELOAD_ALL
)) ||
751 (time(NULL
) - ReloadTime
) >= ReloadTimeout
)
754 * Shutdown the server...
760 # ifndef HAVE_SYSTEMD /* Issue #5640: systemd doesn't actually support launch-on-demand services, need to fake it */
762 # endif /* HAVE_SYSTEMD */
765 #endif /* HAVE_ONDEMAND */
772 * Read configuration...
775 if (!cupsdReadConfiguration())
777 #ifdef HAVE_SYSTEMD_SD_JOURNAL_H
778 sd_journal_print(LOG_ERR
, "Unable to read configuration file \"%s\" - exiting.", ConfigurationFile
);
780 syslog(LOG_LPR
, "Unable to read configuration file \'%s\' - exiting.", ConfigurationFile
);
781 #endif /* HAVE_SYSTEMD_SD_JOURNAL_H */
787 * Startup the server...
795 * Send a server-restarted event...
798 cupsdAddEvent(CUPSD_EVENT_SERVER_RESTARTED
, NULL
, NULL
,
799 "Scheduler restarted.");
804 * Check for available input or ready output. If cupsdDoSelect()
805 * returns 0 or -1, something bad happened and we should exit
808 * Note that we at least have one listening socket open at all
812 if ((timeout
= select_timeout(fds
)) > 1 && LastEvent
)
817 * If no other work is scheduled and we're being controlled by launchd,
818 * systemd, etc. then timeout after 'IdleExitTimeout' seconds of
822 if (timeout
== 86400 && OnDemand
&& IdleExitTimeout
&&
825 # endif /* HAVE_SYSTEMD */
826 !cupsArrayCount(ActiveJobs
))
828 cupsd_printer_t
*p
= NULL
; /* Current printer */
830 if (Browsing
&& BrowseLocalProtocols
)
832 for (p
= (cupsd_printer_t
*)cupsArrayFirst(Printers
); p
; p
= (cupsd_printer_t
*)cupsArrayNext(Printers
))
839 timeout
= IdleExitTimeout
;
840 service_idle_exit
= 1;
844 service_idle_exit
= 0;
845 #endif /* HAVE_ONDEMAND */
847 if ((fds
= cupsdDoSelect(timeout
)) < 0)
850 * Got an error from select!
853 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
854 cupsd_printer_t
*p
; /* Current printer */
855 #endif /* HAVE_DNSSD || HAVE_AVAHI */
857 if (errno
== EINTR
) /* Just interrupted by a signal */
861 * Log all sorts of debug info to help track down the problem.
864 cupsdLogMessage(CUPSD_LOG_EMERG
, "cupsdDoSelect() failed - %s!",
867 for (i
= 0, con
= (cupsd_client_t
*)cupsArrayFirst(Clients
);
869 i
++, con
= (cupsd_client_t
*)cupsArrayNext(Clients
))
870 cupsdLogMessage(CUPSD_LOG_EMERG
,
871 "Clients[%d] = %d, file = %d, state = %d",
872 i
, con
->number
, con
->file
, httpGetState(con
->http
));
874 for (i
= 0, lis
= (cupsd_listener_t
*)cupsArrayFirst(Listeners
);
876 i
++, lis
= (cupsd_listener_t
*)cupsArrayNext(Listeners
))
877 cupsdLogMessage(CUPSD_LOG_EMERG
, "Listeners[%d] = %d", i
, lis
->fd
);
879 cupsdLogMessage(CUPSD_LOG_EMERG
, "CGIPipes[0] = %d", CGIPipes
[0]);
882 cupsdLogMessage(CUPSD_LOG_EMERG
, "SysEventPipes[0] = %d",
884 #endif /* __APPLE__ */
886 for (job
= (cupsd_job_t
*)cupsArrayFirst(ActiveJobs
);
888 job
= (cupsd_job_t
*)cupsArrayNext(ActiveJobs
))
889 cupsdLogMessage(CUPSD_LOG_EMERG
, "Jobs[%d] = %d < [%d %d] > [%d %d]",
891 job
->status_buffer
? job
->status_buffer
->fd
: -1,
892 job
->print_pipes
[0], job
->print_pipes
[1],
893 job
->back_pipes
[0], job
->back_pipes
[1]);
895 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
896 for (p
= (cupsd_printer_t
*)cupsArrayFirst(Printers
);
898 p
= (cupsd_printer_t
*)cupsArrayNext(Printers
))
899 cupsdLogMessage(CUPSD_LOG_EMERG
, "printer[%s] reg_name=\"%s\"", p
->name
,
900 p
->reg_name
? p
->reg_name
: "(null)");
901 #endif /* HAVE_DNSSD || HAVE_AVAHI */
906 current_time
= time(NULL
);
909 * Write dirty config/state files...
912 if (DirtyCleanTime
&& current_time
>= DirtyCleanTime
)
917 * If we are going to sleep and still have pending jobs, stop them after
918 * a period of time...
921 if (SleepJobs
> 0 && current_time
>= SleepJobs
&&
922 cupsArrayCount(PrintingJobs
) > 0)
925 cupsdStopAllJobs(CUPSD_JOB_DEFAULT
, 5);
927 #endif /* __APPLE__ */
931 * Update the network interfaces once a minute...
934 if ((current_time
- netif_time
) >= 60)
936 netif_time
= current_time
;
939 #endif /* !__APPLE__ */
943 * If no other work was scheduled and we're being controlled by launchd,
944 * systemd, or upstart then timeout after 'LaunchdTimeout' seconds of
948 if (!fds
&& service_idle_exit
)
950 cupsdLogMessage(CUPSD_LOG_INFO
,
951 "Printer sharing is off and there are no jobs pending, "
952 "will restart on demand.");
956 #endif /* HAVE_ONDEMAND */
959 * Resume listening for new connections as needed...
962 if (ListeningPaused
&& ListeningPaused
<= current_time
&&
963 cupsArrayCount(Clients
) < MaxClients
)
964 cupsdResumeListening();
967 * Expire subscriptions and unload completed jobs as needed...
970 if (current_time
> expire_time
)
972 cupsdExpireSubscriptions(NULL
, NULL
);
974 cupsdUnloadCompletedJobs();
976 expire_time
= current_time
;
980 * Delete stale local printers...
983 if (current_time
>= local_timeout
)
985 cupsdDeleteTemporaryPrinters(0);
989 #ifndef HAVE_AUTHORIZATION_H
991 * Update the root certificate once every 5 minutes if we have client
995 if ((current_time
- RootCertTime
) >= RootCertDuration
&& RootCertDuration
&&
996 !RunUser
&& cupsArrayCount(Clients
))
999 * Update the root certificate...
1003 cupsdAddCert(0, "root", cupsdDefaultAuthType());
1005 #endif /* !HAVE_AUTHORIZATION_H */
1008 * Clean job history...
1011 if (JobHistoryUpdate
&& current_time
>= JobHistoryUpdate
)
1015 * Update any pending multi-file documents...
1018 if ((current_time
- senddoc_time
) >= 10)
1021 senddoc_time
= current_time
;
1025 * Check for new data on the client sockets...
1028 for (con
= (cupsd_client_t
*)cupsArrayFirst(Clients
);
1030 con
= (cupsd_client_t
*)cupsArrayNext(Clients
))
1033 * Process pending data in the input buffer...
1036 if (httpGetReady(con
->http
))
1038 cupsdReadClient(con
);
1043 * Check the activity and close old clients...
1046 activity
= current_time
- Timeout
;
1047 if (httpGetActivity(con
->http
) < activity
&& !con
->pipe_pid
)
1049 cupsdLogMessage(CUPSD_LOG_DEBUG
, "Closing client %d after %d seconds of inactivity.", con
->number
, Timeout
);
1051 cupsdCloseClient(con
);
1057 * Log statistics at most once a minute when in debug mode...
1060 if ((current_time
- report_time
) >= 60 && LogLevel
>= CUPSD_LOG_DEBUG
)
1062 size_t string_count
, /* String count */
1063 alloc_bytes
, /* Allocated string bytes */
1064 total_bytes
; /* Total string bytes */
1065 #ifdef HAVE_MALLINFO
1066 struct mallinfo mem
; /* Malloc information */
1070 cupsdLogMessage(CUPSD_LOG_DEBUG
, "Report: malloc-arena=%lu", mem
.arena
);
1071 cupsdLogMessage(CUPSD_LOG_DEBUG
, "Report: malloc-used=%lu",
1072 mem
.usmblks
+ mem
.uordblks
);
1073 cupsdLogMessage(CUPSD_LOG_DEBUG
, "Report: malloc-free=%lu",
1074 mem
.fsmblks
+ mem
.fordblks
);
1075 #endif /* HAVE_MALLINFO */
1077 cupsdLogMessage(CUPSD_LOG_DEBUG
, "Report: clients=%d",
1078 cupsArrayCount(Clients
));
1079 cupsdLogMessage(CUPSD_LOG_DEBUG
, "Report: jobs=%d",
1080 cupsArrayCount(Jobs
));
1081 cupsdLogMessage(CUPSD_LOG_DEBUG
, "Report: jobs-active=%d",
1082 cupsArrayCount(ActiveJobs
));
1083 cupsdLogMessage(CUPSD_LOG_DEBUG
, "Report: printers=%d",
1084 cupsArrayCount(Printers
));
1086 string_count
= _cupsStrStatistics(&alloc_bytes
, &total_bytes
);
1087 cupsdLogMessage(CUPSD_LOG_DEBUG
,
1088 "Report: stringpool-string-count=" CUPS_LLFMT
,
1089 CUPS_LLCAST string_count
);
1090 cupsdLogMessage(CUPSD_LOG_DEBUG
,
1091 "Report: stringpool-alloc-bytes=" CUPS_LLFMT
,
1092 CUPS_LLCAST alloc_bytes
);
1093 cupsdLogMessage(CUPSD_LOG_DEBUG
,
1094 "Report: stringpool-total-bytes=" CUPS_LLFMT
,
1095 CUPS_LLCAST total_bytes
);
1097 report_time
= current_time
;
1101 * Handle OS-specific event notification for any events that have
1102 * accumulated. Don't send these more than once a second...
1105 if (LastEvent
&& (current_time
- event_time
) >= 1)
1107 #ifdef HAVE_NOTIFY_POST
1108 if (LastEvent
& (CUPSD_EVENT_PRINTER_ADDED
|
1109 CUPSD_EVENT_PRINTER_DELETED
|
1110 CUPSD_EVENT_PRINTER_MODIFIED
))
1112 cupsdLogMessage(CUPSD_LOG_DEBUG2
,
1113 "notify_post(\"com.apple.printerListChange\")");
1114 notify_post("com.apple.printerListChange");
1117 if (LastEvent
& CUPSD_EVENT_PRINTER_STATE_CHANGED
)
1119 cupsdLogMessage(CUPSD_LOG_DEBUG2
,
1120 "notify_post(\"com.apple.printerHistoryChange\")");
1121 notify_post("com.apple.printerHistoryChange");
1124 if (LastEvent
& (CUPSD_EVENT_JOB_STATE_CHANGED
|
1125 CUPSD_EVENT_JOB_CONFIG_CHANGED
|
1126 CUPSD_EVENT_JOB_PROGRESS
))
1128 cupsdLogMessage(CUPSD_LOG_DEBUG2
,
1129 "notify_post(\"com.apple.jobChange\")");
1130 notify_post("com.apple.jobChange");
1132 #endif /* HAVE_NOTIFY_POST */
1135 * Reset the accumulated events...
1138 LastEvent
= CUPSD_EVENT_NONE
;
1139 event_time
= current_time
;
1144 * Log a message based on what happened...
1149 cupsdLogMessage(CUPSD_LOG_INFO
, "Scheduler shutting down normally.");
1150 cupsdAddEvent(CUPSD_EVENT_SERVER_STOPPED
, NULL
, NULL
,
1151 "Scheduler shutting down normally.");
1155 cupsdLogMessage(CUPSD_LOG_ERROR
,
1156 "Scheduler shutting down due to program error.");
1157 cupsdAddEvent(CUPSD_EVENT_SERVER_STOPPED
, NULL
, NULL
,
1158 "Scheduler shutting down due to program error.");
1162 * Close all network clients...
1170 * Update the KeepAlive/PID file as needed...
1173 service_checkout(1);
1182 * Delete all temporary printers...
1185 cupsdDeleteTemporaryPrinters(1);
1189 * Stop monitoring system event monitoring...
1193 cupsdStopSystemMonitor();
1194 #endif /* __APPLE__ */
1198 return (!stop_scheduler
);
1203 * 'cupsdAddString()' - Copy and add a string to an array.
1206 int /* O - 1 on success, 0 on failure */
1207 cupsdAddString(cups_array_t
**a
, /* IO - String array */
1208 const char *s
) /* I - String to copy and add */
1211 *a
= cupsArrayNew3((cups_array_func_t
)strcmp
, NULL
,
1212 (cups_ahash_func_t
)NULL
, 0,
1213 (cups_acopy_func_t
)strdup
,
1214 (cups_afree_func_t
)free
);
1216 return (cupsArrayAdd(*a
, (char *)s
));
1221 * 'cupsdCheckProcess()' - Tell the main loop to check for dead children.
1225 cupsdCheckProcess(void)
1228 * Flag that we have dead children...
1236 * 'cupsdClearString()' - Clear a string.
1240 cupsdClearString(char **s
) /* O - String value */
1251 * 'cupsdFreeStrings()' - Free an array of strings.
1255 cupsdFreeStrings(cups_array_t
**a
) /* IO - String array */
1259 cupsArrayDelete(*a
);
1266 * 'cupsdHoldSignals()' - Hold child and termination signals.
1270 cupsdHoldSignals(void)
1272 #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
1273 sigset_t newmask
; /* New POSIX signal mask */
1274 #endif /* HAVE_SIGACTION && !HAVE_SIGSET */
1284 #elif defined(HAVE_SIGACTION)
1285 sigemptyset(&newmask
);
1286 sigaddset(&newmask
, SIGTERM
);
1287 sigaddset(&newmask
, SIGCHLD
);
1288 sigprocmask(SIG_BLOCK
, &newmask
, &holdmask
);
1289 #endif /* HAVE_SIGSET */
1294 * 'cupsdReleaseSignals()' - Release signals for delivery.
1298 cupsdReleaseSignals(void)
1307 #elif defined(HAVE_SIGACTION)
1308 sigprocmask(SIG_SETMASK
, &holdmask
, NULL
);
1309 #endif /* HAVE_SIGSET */
1314 * 'cupsdSetString()' - Set a string value.
1318 cupsdSetString(char **s
, /* O - New string */
1319 const char *v
) /* I - String value */
1335 * 'cupsdSetStringf()' - Set a formatted string value.
1339 cupsdSetStringf(char **s
, /* O - New string */
1340 const char *f
, /* I - Printf-style format string */
1341 ...) /* I - Additional args as needed */
1343 char v
[65536 + 64]; /* Formatting string value */
1344 va_list ap
; /* Argument pointer */
1345 char *olds
; /* Old string */
1356 vsnprintf(v
, sizeof(v
), f
, ap
);
1370 * 'parent_handler()' - Catch USR1/CHLD signals...
1374 parent_handler(int sig
) /* I - Signal */
1377 * Store the signal we got from the OS and return...
1380 parent_signal
= sig
;
1385 * 'process_children()' - Process all dead children...
1389 process_children(void)
1391 int status
; /* Exit status of child */
1392 int pid
, /* Process ID of child */
1393 job_id
; /* Job ID of child */
1394 cupsd_job_t
*job
; /* Current job */
1395 int i
; /* Looping var */
1396 char name
[1024]; /* Process name */
1397 const char *type
; /* Type of program */
1400 cupsdLogMessage(CUPSD_LOG_DEBUG2
, "process_children()");
1403 * Reset the dead_children flag...
1409 * Collect the exit status of some children...
1413 while ((pid
= waitpid(-1, &status
, WNOHANG
)) > 0)
1414 #elif defined(HAVE_WAIT3)
1415 while ((pid
= wait3(&status
, WNOHANG
, NULL
)) > 0)
1417 if ((pid
= wait(&status
)) > 0)
1418 #endif /* HAVE_WAITPID */
1421 * Collect the name of the process that finished...
1424 cupsdFinishProcess(pid
, name
, sizeof(name
), &job_id
);
1427 * Delete certificates for CGI processes...
1431 cupsdDeleteCert(pid
);
1434 * Handle completed job filters...
1438 job
= cupsdFindJob(job_id
);
1444 for (i
= 0; job
->filters
[i
]; i
++)
1445 if (job
->filters
[i
] == pid
)
1448 if (job
->filters
[i
] || job
->backend
== pid
)
1451 * OK, this process has gone away; what's left?
1454 if (job
->filters
[i
])
1456 job
->filters
[i
] = -pid
;
1461 job
->backend
= -pid
;
1465 if (status
&& status
!= SIGTERM
&& status
!= SIGKILL
&&
1469 * An error occurred; save the exit status so we know to stop
1470 * the printer or cancel the job when all of the filters finish...
1472 * A negative status indicates that the backend failed and the
1473 * printer needs to be stopped.
1475 * In order to preserve the most serious status, we always log
1476 * when a process dies due to a signal (e.g. SIGABRT, SIGSEGV,
1477 * and SIGBUS) and prefer to log the backend exit status over a
1481 int old_status
= abs(job
->status
);
1483 if (WIFSIGNALED(status
) || /* This process crashed, or */
1484 !job
->status
|| /* No process had a status, or */
1485 (!job
->filters
[i
] && WIFEXITED(old_status
)))
1486 { /* Backend and filter didn't crash */
1487 if (job
->filters
[i
])
1489 job
->status
= status
; /* Filter failed */
1493 job
->status
= -status
; /* Backend failed */
1495 if (job
->current_file
< job
->num_files
)
1496 cupsdSetJobState(job
, IPP_JOB_ABORTED
, CUPSD_JOB_FORCE
, "Canceling multi-file job due to backend failure.");
1500 if (job
->state_value
== IPP_JOB_PROCESSING
&&
1501 job
->status_level
> CUPSD_LOG_ERROR
&&
1502 (job
->filters
[i
] || !WIFEXITED(status
)))
1504 char message
[1024]; /* New printer-state-message */
1507 job
->status_level
= CUPSD_LOG_ERROR
;
1509 snprintf(message
, sizeof(message
), "%s failed", type
);
1513 strlcpy(job
->printer
->state_message
, message
,
1514 sizeof(job
->printer
->state_message
));
1520 if (!job
->printer_message
&& job
->attrs
)
1522 if ((job
->printer_message
=
1523 ippFindAttribute(job
->attrs
, "job-printer-state-message",
1524 IPP_TAG_TEXT
)) == NULL
)
1525 job
->printer_message
= ippAddString(job
->attrs
, IPP_TAG_JOB
,
1527 "job-printer-state-message",
1531 if (job
->printer_message
)
1532 ippSetString(job
->attrs
, &job
->printer_message
, 0, message
);
1537 * If this is not the last file in a job, see if all of the
1538 * filters are done, and if so move to the next file.
1541 if (job
->state_value
>= IPP_JOB_CANCELED
)
1544 * Remove the job from the active list if there are no processes still
1548 for (i
= 0; job
->filters
[i
] < 0; i
++);
1550 if (!job
->filters
[i
] && job
->backend
<= 0)
1551 cupsArrayRemove(ActiveJobs
, job
);
1553 else if (job
->current_file
< job
->num_files
&& job
->printer
)
1555 for (i
= 0; job
->filters
[i
] < 0; i
++);
1557 if (!job
->filters
[i
] &&
1558 (!job
->printer
->pc
|| !job
->printer
->pc
->single_file
||
1562 * Process the next file...
1565 cupsdContinueJob(job
);
1572 * Show the exit status as needed, ignoring SIGTERM and SIGKILL errors
1573 * since they come when we kill/end a process...
1576 if (status
== SIGTERM
|| status
== SIGKILL
)
1578 cupsdLogJob(job
, CUPSD_LOG_DEBUG
,
1579 "PID %d (%s) was terminated normally with signal %d.", pid
,
1582 else if (status
== SIGPIPE
)
1584 cupsdLogJob(job
, CUPSD_LOG_DEBUG
,
1585 "PID %d (%s) did not catch or ignore signal %d.", pid
, name
,
1590 if (WIFEXITED(status
))
1592 int code
= WEXITSTATUS(status
); /* Exit code */
1595 cupsdLogJob(job
, CUPSD_LOG_DEBUG
,
1596 "PID %d (%s) stopped with status %d (%s)", pid
, name
,
1597 code
, strerror(code
- 100));
1599 cupsdLogJob(job
, CUPSD_LOG_DEBUG
,
1600 "PID %d (%s) stopped with status %d.", pid
, name
, code
);
1603 cupsdLogJob(job
, CUPSD_LOG_DEBUG
, "PID %d (%s) crashed on signal %d.",
1604 pid
, name
, WTERMSIG(status
));
1606 if (LogLevel
< CUPSD_LOG_DEBUG
)
1607 cupsdLogJob(job
, CUPSD_LOG_INFO
,
1608 "Hint: Try setting the LogLevel to \"debug\" to find out "
1612 cupsdLogJob(job
, CUPSD_LOG_DEBUG
, "PID %d (%s) exited with no errors.",
1617 * If wait*() is interrupted by a signal, tell main() to call us again...
1620 if (pid
< 0 && errno
== EINTR
)
1626 * 'select_timeout()' - Calculate the select timeout value.
1630 static long /* O - Number of seconds */
1631 select_timeout(int fds
) /* I - Number of descriptors returned */
1633 long timeout
; /* Timeout for select */
1634 time_t now
; /* Current time */
1635 cupsd_client_t
*con
; /* Client information */
1636 cupsd_job_t
*job
; /* Job information */
1637 const char *why
; /* Debugging aid */
1640 cupsdLogMessage(CUPSD_LOG_DEBUG2
, "select_timeout: JobHistoryUpdate=%ld",
1641 (long)JobHistoryUpdate
);
1644 * Check to see if any of the clients have pending data to be
1645 * processed; if so, the timeout should be 0...
1648 for (con
= (cupsd_client_t
*)cupsArrayFirst(Clients
);
1650 con
= (cupsd_client_t
*)cupsArrayNext(Clients
))
1651 if (httpGetReady(con
->http
))
1655 * If select has been active in the last second (fds > 0) or we have
1656 * many resources in use then don't bother trying to optimize the
1657 * timeout, just make it 1 second.
1660 if (fds
> 0 || cupsArrayCount(Clients
) > 50)
1664 * Otherwise, check all of the possible events that we need to wake for...
1668 timeout
= now
+ 86400; /* 86400 == 1 day */
1673 * When going to sleep, wake up to abort jobs that don't complete in time.
1676 if (SleepJobs
> 0 && SleepJobs
< timeout
)
1678 timeout
= SleepJobs
;
1679 why
= "abort jobs before sleeping";
1681 #endif /* __APPLE__ */
1684 * Check whether we are accepting new connections...
1687 if (ListeningPaused
> 0 && cupsArrayCount(Clients
) < MaxClients
&&
1688 ListeningPaused
< timeout
)
1690 if (ListeningPaused
<= now
)
1693 timeout
= ListeningPaused
;
1695 why
= "resume listening";
1699 * Check the activity and close old clients...
1702 for (con
= (cupsd_client_t
*)cupsArrayFirst(Clients
);
1704 con
= (cupsd_client_t
*)cupsArrayNext(Clients
))
1705 if ((httpGetActivity(con
->http
) + Timeout
) < timeout
)
1707 timeout
= httpGetActivity(con
->http
) + Timeout
;
1708 why
= "timeout a client connection";
1712 * Write out changes to configuration and state files...
1715 if (DirtyCleanTime
&& timeout
> DirtyCleanTime
)
1717 timeout
= DirtyCleanTime
;
1718 why
= "write dirty config/state files";
1722 * Check for any job activity...
1725 for (job
= (cupsd_job_t
*)cupsArrayFirst(ActiveJobs
);
1727 job
= (cupsd_job_t
*)cupsArrayNext(ActiveJobs
))
1729 if (job
->cancel_time
&& job
->cancel_time
< timeout
)
1731 timeout
= job
->cancel_time
;
1732 why
= "cancel stuck jobs";
1735 if (job
->kill_time
&& job
->kill_time
< timeout
)
1737 timeout
= job
->kill_time
;
1738 why
= "kill unresponsive jobs";
1741 if (job
->state_value
== IPP_JOB_HELD
&& job
->hold_until
< timeout
)
1743 timeout
= job
->hold_until
;
1744 why
= "release held jobs";
1747 if (job
->state_value
== IPP_JOB_PENDING
&& timeout
> (now
+ 10))
1750 why
= "start pending jobs";
1756 * Adjust from absolute to relative time. We add 1 second to the timeout since
1757 * events occur after the timeout expires, and limit the timeout to 86400
1758 * seconds (1 day) to avoid select() timeout limits present on some operating
1762 timeout
= timeout
- now
+ 1;
1766 else if (timeout
> 86400)
1770 * Log and return the timeout value...
1773 cupsdLogMessage(CUPSD_LOG_DEBUG2
, "select_timeout(%d): %ld seconds to %s",
1781 * 'sigchld_handler()' - Handle 'child' signals from old processes.
1785 sigchld_handler(int sig
) /* I - Signal number */
1790 * Flag that we have dead children...
1796 * Reset the signal handler as needed...
1799 #if !defined(HAVE_SIGSET) && !defined(HAVE_SIGACTION)
1800 signal(SIGCLD
, sigchld_handler
);
1801 #endif /* !HAVE_SIGSET && !HAVE_SIGACTION */
1806 * 'sighup_handler()' - Handle 'hangup' signals to reconfigure the scheduler.
1810 sighup_handler(int sig
) /* I - Signal number */
1814 NeedReload
= RELOAD_ALL
;
1815 ReloadTime
= time(NULL
);
1817 #if !defined(HAVE_SIGSET) && !defined(HAVE_SIGACTION)
1818 signal(SIGHUP
, sighup_handler
);
1819 #endif /* !HAVE_SIGSET && !HAVE_SIGACTION */
1824 * 'sigterm_handler()' - Handle 'terminate' signals that stop the scheduler.
1828 sigterm_handler(int sig
) /* I - Signal number */
1830 (void)sig
; /* remove compiler warnings... */
1833 * Flag that we should stop and return...
1840 #ifdef HAVE_ONDEMAND
1842 * 'service_add_listener()' - Bind an open fd as a Listener.
1846 service_add_listener(int fd
, /* I - Socket file descriptor */
1847 int idx
) /* I - Listener number, for logging */
1849 cupsd_listener_t
*lis
; /* Listeners array */
1850 http_addr_t addr
; /* Address variable */
1851 socklen_t addrlen
; /* Length of address */
1852 char s
[256]; /* String addresss */
1855 addrlen
= sizeof(addr
);
1857 if (getsockname(fd
, (struct sockaddr
*)&addr
, &addrlen
))
1859 cupsdLogMessage(CUPSD_LOG_ERROR
, "service_add_listener: Unable to get local address for listener #%d: %s", idx
+ 1, strerror(errno
));
1863 cupsdLogMessage(CUPSD_LOG_DEBUG
, "service_add_listener: Listener #%d at fd %d, \"%s\".", idx
+ 1, fd
, httpAddrString(&addr
, s
, sizeof(s
)));
1866 * Try to match the on-demand socket address to one of the listeners...
1869 for (lis
= (cupsd_listener_t
*)cupsArrayFirst(Listeners
);
1871 lis
= (cupsd_listener_t
*)cupsArrayNext(Listeners
))
1872 if (httpAddrEqual(&lis
->address
, &addr
))
1876 * Add a new listener If there's no match...
1881 cupsdLogMessage(CUPSD_LOG_DEBUG
, "service_add_listener: Matched existing listener #%d to %s.", idx
+ 1, httpAddrString(&(lis
->address
), s
, sizeof(s
)));
1885 cupsdLogMessage(CUPSD_LOG_DEBUG
, "service_add_listener: Adding new listener #%d for %s.", idx
+ 1, httpAddrString(&addr
, s
, sizeof(s
)));
1887 if ((lis
= calloc(1, sizeof(cupsd_listener_t
))) == NULL
)
1889 cupsdLogMessage(CUPSD_LOG_ERROR
, "service_add_listener: Unable to allocate listener: %s.", strerror(errno
));
1894 cupsArrayAdd(Listeners
, lis
);
1896 memcpy(&lis
->address
, &addr
, sizeof(lis
->address
));
1903 if (httpAddrPort(&(lis
->address
)) == 443)
1904 lis
->encryption
= HTTP_ENCRYPT_ALWAYS
;
1905 # endif /* HAVE_SSL */
1907 #endif /* HAVE_ONDEMAND */
1911 * 'service_checkin()' - Check-in with launchd and collect the listening fds.
1915 service_checkin(void)
1917 cupsdLogMessage(CUPSD_LOG_DEBUG
, "service_checkin: pid=%d", (int)getpid());
1922 int error
; /* Check-in error, if any */
1923 size_t i
, /* Looping var */
1924 count
; /* Number of listeners */
1925 int *ld_sockets
; /* Listener sockets */
1929 * Force "user initiated" priority for the main thread...
1932 pthread_set_qos_class_self_np(QOS_CLASS_USER_INITIATED
, 0);
1933 # endif /* __APPLE__ */
1936 * Check-in with launchd...
1939 if ((error
= launch_activate_socket("Listeners", &ld_sockets
, &count
)) != 0)
1941 cupsdLogMessage(CUPSD_LOG_ERROR
, "service_checkin: Unable to get listener sockets: %s", strerror(error
));
1943 return; /* anti-compiler-warning */
1947 * Try to match the launchd sockets to the cupsd listeners...
1950 cupsdLogMessage(CUPSD_LOG_DEBUG
, "service_checkin: %d listeners.", (int)count
);
1952 for (i
= 0; i
< count
; i
++)
1953 service_add_listener(ld_sockets
[i
], (int)i
);
1958 xpc_transaction_begin();
1959 # endif /* __APPLE__ */
1962 #elif defined(HAVE_SYSTEMD)
1965 int i
, /* Looping var */
1966 count
; /* Number of listeners */
1969 * Check-in with systemd...
1972 if ((count
= sd_listen_fds(0)) < 0)
1974 cupsdLogMessage(CUPSD_LOG_ERROR
, "service_checkin: Unable to get listener sockets: %s", strerror(-count
));
1976 return; /* anti-compiler-warning */
1980 * Try to match the systemd sockets to the cupsd listeners...
1983 cupsdLogMessage(CUPSD_LOG_DEBUG
, "service_checkin: %d listeners.", count
);
1985 for (i
= 0; i
< count
; i
++)
1986 service_add_listener(SD_LISTEN_FDS_START
+ i
, i
);
1989 #elif defined(HAVE_UPSTART)
1992 const char *e
; /* Environment var */
1993 int fd
; /* File descriptor */
1996 if (!(e
= getenv("UPSTART_EVENTS")))
1998 cupsdLogMessage(CUPSD_LOG_ERROR
, "service_checkin: We did not get started via Upstart.");
2003 if (strcasecmp(e
, "socket"))
2005 cupsdLogMessage(CUPSD_LOG_ERROR
, "service_checkin: We did not get triggered via an Upstart socket event.");
2010 if ((e
= getenv("UPSTART_FDS")) == NULL
)
2012 cupsdLogMessage(CUPSD_LOG_ERROR
, "service_checkin: Unable to get listener sockets from UPSTART_FDS.");
2017 cupsdLogMessage(CUPSD_LOG_DEBUG
, "service_checkin: UPSTART_FDS=%s", e
);
2019 fd
= (int)strtol(e
, NULL
, 10);
2022 cupsdLogMessage(CUPSD_LOG_ERROR
, "service_checkin: Could not parse UPSTART_FDS: %s", strerror(errno
));
2028 * Upstart only supportst a single on-demand socket file descriptor...
2031 service_add_listener(fd
, 0);
2033 #endif /* HAVE_LAUNCHD */
2038 * 'service_checkout()' - Update the KeepAlive/PID file as needed.
2042 service_checkout(int shutdown
) /* I - Shutting down? */
2044 cups_file_t
*fp
; /* File */
2045 char pidfile
[1024]; /* PID/KeepAlive file */
2049 * When running on-demand, use the KeepAlive file, otherwise write a PID file
2053 #ifdef HAVE_ONDEMAND
2056 int shared_printers
= 0; /* Do we have shared printers? */
2058 strlcpy(pidfile
, CUPS_KEEPALIVE
, sizeof(pidfile
));
2061 * If printer sharing is on see if there are any actual shared printers...
2064 if (Browsing
&& BrowseLocalProtocols
)
2066 cupsd_printer_t
*p
= NULL
; /* Current printer */
2068 for (p
= (cupsd_printer_t
*)cupsArrayFirst(Printers
); p
; p
= (cupsd_printer_t
*)cupsArrayNext(Printers
))
2074 shared_printers
= (p
!= NULL
);
2077 if (cupsArrayCount(ActiveJobs
) || /* Active jobs */
2078 WebInterface
|| /* Web interface enabled */
2079 NeedReload
|| /* Doing a reload */
2080 shared_printers
) /* Printers being shared */
2083 * Create or remove the "keep-alive" file based on whether there are active
2084 * jobs or shared printers to advertise...
2091 #endif /* HAVE_ONDEMAND */
2092 snprintf(pidfile
, sizeof(pidfile
), "%s/cupsd.pid", StateDir
);
2096 cupsdLogMessage(CUPSD_LOG_DEBUG
, "Removing KeepAlive/PID file \"%s\".", pidfile
);
2102 cupsdLogMessage(CUPSD_LOG_DEBUG
, "Creating KeepAlive/PID file \"%s\".", pidfile
);
2104 if ((fp
= cupsFileOpen(pidfile
, "w")) != NULL
)
2107 * Save the PID in the file...
2110 cupsFilePrintf(fp
, "%d\n", (int)getpid());
2114 cupsdLogMessage(CUPSD_LOG_ERROR
, "Unable to create KeepAlive/PID file \"%s\": %s", pidfile
, strerror(errno
));
2118 if (OnDemand
&& shutdown
)
2119 xpc_transaction_end();
2120 # endif /* __APPLE__ */
2125 * 'usage()' - Show scheduler usage.
2129 usage(int status
) /* O - Exit status */
2131 FILE *fp
= status
? stderr
: stdout
; /* Output file */
2134 _cupsLangPuts(fp
, _("Usage: cupsd [options]"));
2135 _cupsLangPuts(fp
, _("Options:"));
2136 _cupsLangPuts(fp
, _("-c cupsd.conf Set cupsd.conf file to use."));
2137 _cupsLangPuts(fp
, _("-f Run in the foreground."));
2138 _cupsLangPuts(fp
, _("-F Run in the foreground but detach from console."));
2139 _cupsLangPuts(fp
, _("-h Show this usage message."));
2140 #ifdef HAVE_ONDEMAND
2141 _cupsLangPuts(fp
, _("-l Run cupsd on demand."));
2142 #endif /* HAVE_ONDEMAND */
2143 _cupsLangPuts(fp
, _("-s cups-files.conf Set cups-files.conf file to use."));
2144 _cupsLangPuts(fp
, _("-t Test the configuration file."));