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gerrit-public.fairphone.software / platform / external / libcups / fcc9599fea31bd0d51d33510240f77a7b41a4ca5 / . / scheduler / main.c
blob: d5fdf971a8acee0ac51bf9e5f353828c4ae3f2bc [file] [log] [blame]
/*
* Main loop for the CUPS scheduler.
*
* Copyright © 2007-2019 by Apple Inc.
* Copyright © 1997-2007 by Easy Software Products, all rights reserved.
*
* Licensed under Apache License v2.0. See the file "LICENSE" for more
* information.
*/
/*
* Include necessary headers...
*/
#define _MAIN_C_
#include "cupsd.h"
#include <sys/resource.h>
#ifdef __APPLE__
# include <xpc/xpc.h>
# include <pthread/qos.h>
#endif /* __APPLE__ */
#ifdef HAVE_ASL_H
# include <asl.h>
#elif defined(HAVE_SYSTEMD_SD_JOURNAL_H)
# define SD_JOURNAL_SUPPRESS_LOCATION
# include <systemd/sd-journal.h>
#endif /* HAVE_ASL_H */
#include <syslog.h>
#include <grp.h>
#ifdef HAVE_LAUNCH_H
# include <launch.h>
#endif /* HAVE_LAUNCH_H */
#ifdef HAVE_SYSTEMD
# include <systemd/sd-daemon.h>
#endif /* HAVE_SYSTEMD */
#ifdef HAVE_ONDEMAND
# define CUPS_KEEPALIVE CUPS_CACHEDIR "/org.cups.cupsd"
/* Name of the KeepAlive file */
#endif /* HAVE_ONDEMAND */
#if defined(HAVE_MALLOC_H) && defined(HAVE_MALLINFO)
# include <malloc.h>
#endif /* HAVE_MALLOC_H && HAVE_MALLINFO */
#ifdef HAVE_NOTIFY_H
# include <notify.h>
#endif /* HAVE_NOTIFY_H */
#ifdef HAVE_DBUS
# include <dbus/dbus.h>
#endif /* HAVE_DBUS */
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif /* HAVE_SYS_PARAM_H */
/*
* Local functions...
*/
static void parent_handler(int sig);
static void process_children(void);
static void sigchld_handler(int sig);
static void sighup_handler(int sig);
static void sigterm_handler(int sig);
static long select_timeout(int fds);
static void service_checkin(void);
static void service_checkout(int shutdown);
static void usage(int status) _CUPS_NORETURN;
/*
* Local globals...
*/
static int parent_signal = 0;
/* Set to signal number from child */
static int holdcount = 0; /* Number of times "hold" was called */
#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
static sigset_t holdmask; /* Old POSIX signal mask */
#endif /* HAVE_SIGACTION && !HAVE_SIGSET */
static int dead_children = 0;
/* Dead children? */
static int stop_scheduler = 0;
/* Should the scheduler stop? */
static time_t local_timeout = 0;
/* Next local printer timeout */
/*
* 'main()' - Main entry for the CUPS scheduler.
*/
int /* O - Exit status */
main(int argc, /* I - Number of command-line args */
char *argv[]) /* I - Command-line arguments */
{
int i; /* Looping var */
char *opt; /* Option character */
int close_all = 1, /* Close all file descriptors? */
disconnect = 1, /* Disconnect from controlling terminal? */
fg = 0, /* Run in foreground? */
run_as_child = 0,
/* Running as child process? */
print_profile = 0;
/* Print the sandbox profile to stdout? */
int fds; /* Number of ready descriptors */
cupsd_client_t *con; /* Current client */
cupsd_job_t *job; /* Current job */
cupsd_listener_t *lis; /* Current listener */
time_t current_time, /* Current time */
activity, /* Client activity timer */
senddoc_time, /* Send-Document time */
expire_time, /* Subscription expire time */
report_time, /* Malloc/client/job report time */
event_time; /* Last event notification time */
long timeout; /* Timeout for cupsdDoSelect() */
struct rlimit limit; /* Runtime limit */
#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
struct sigaction action; /* Actions for POSIX signals */
#endif /* HAVE_SIGACTION && !HAVE_SIGSET */
#ifdef __APPLE__
int use_sysman = 1; /* Use system management functions? */
#else
time_t netif_time = 0; /* Time since last network update */
#endif /* __APPLE__ */
#if defined(HAVE_ONDEMAND)
int service_idle_exit = 0;
/* Idle exit on select timeout? */
#endif /* HAVE_ONDEMAND */
#ifdef HAVE_GETEUID
/*
* Check for setuid invocation, which we do not support!
*/
if (getuid() != geteuid())
{
fputs("cupsd: Cannot run as a setuid program.\n", stderr);
return (1);
}
#endif /* HAVE_GETEUID */
/*
* Check for command-line arguments...
*/
fg = 0;
for (i = 1; i < argc; i ++)
{
if (!strcmp(argv[i], "--help"))
usage(0);
else if (argv[i][0] == '-')
{
for (opt = argv[i] + 1; *opt != '\0'; opt ++)
{
switch (*opt)
{
case 'C' : /* Run as child with config file */
run_as_child = 1;
fg = 1;
close_all = 0;
case 'c' : /* Configuration file */
i ++;
if (i >= argc)
{
_cupsLangPuts(stderr, _("cupsd: Expected config filename "
"after \"-c\" option."));
usage(1);
}
if (argv[i][0] == '/')
{
/*
* Absolute directory...
*/
cupsdSetString(&ConfigurationFile, argv[i]);
}
else
{
/*
* Relative directory...
*/
char *current; /* Current directory */
/*
* Allocate a buffer for the current working directory to
* reduce run-time stack usage; this approximates the
* behavior of some implementations of getcwd() when they
* are passed a NULL pointer.
*/
if ((current = malloc(1024)) == NULL)
{
_cupsLangPuts(stderr,
_("cupsd: Unable to get current directory."));
return (1);
}
if (!getcwd(current, 1024))
{
_cupsLangPuts(stderr,
_("cupsd: Unable to get current directory."));
free(current);
return (1);
}
cupsdSetStringf(&ConfigurationFile, "%s/%s", current, argv[i]);
free(current);
}
break;
case 'f' : /* Run in foreground... */
fg = 1;
disconnect = 0;
close_all = 0;
break;
case 'F' : /* Run in foreground, but disconnect from terminal... */
fg = 1;
close_all = 0;
break;
case 'h' : /* Show usage/help */
usage(0);
break;
case 'l' : /* Started by launchd/systemd/upstart... */
#ifdef HAVE_ONDEMAND
OnDemand = 1;
fg = 1;
close_all = 0;
disconnect = 0;
#else
_cupsLangPuts(stderr, _("cupsd: On-demand support not compiled "
"in, running in normal mode."));
fg = 0;
disconnect = 1;
close_all = 1;
#endif /* HAVE_ONDEMAND */
break;
case 'p' : /* Stop immediately for profiling */
fputs("cupsd: -p (startup profiling) is for internal testing "
"use only!\n", stderr);
stop_scheduler = 1;
fg = 1;
disconnect = 0;
close_all = 0;
break;
case 'P' : /* Disable security profiles */
fputs("cupsd: -P (disable sandboxing) is for internal testing use only.\n", stderr);
UseSandboxing = 0;
break;
case 's' : /* Set cups-files.conf location */
i ++;
if (i >= argc)
{
_cupsLangPuts(stderr, _("cupsd: Expected cups-files.conf "
"filename after \"-s\" option."));
usage(1);
}
if (argv[i][0] != '/')
{
/*
* Relative filename not allowed...
*/
_cupsLangPuts(stderr, _("cupsd: Relative cups-files.conf "
"filename not allowed."));
usage(1);
}
cupsdSetString(&CupsFilesFile, argv[i]);
break;
#ifdef __APPLE__
case 'S' : /* Disable system management functions */
fputs("cupsd: -S (disable system management) for internal "
"testing use only!\n", stderr);
use_sysman = 0;
break;
#endif /* __APPLE__ */
case 't' : /* Test the cupsd.conf file... */
TestConfigFile = 1;
fg = 1;
disconnect = 0;
close_all = 0;
break;
case 'T' : /* Print security profile */
print_profile = 1;
fg = 1;
disconnect = 0;
close_all = 0;
break;
default : /* Unknown option */
_cupsLangPrintf(stderr, _("cupsd: Unknown option \"%c\" - "
"aborting."), *opt);
usage(1);
break;
}
}
}
else
{
_cupsLangPrintf(stderr, _("cupsd: Unknown argument \"%s\" - aborting."),
argv[i]);
usage(1);
}
}
if (!ConfigurationFile)
cupsdSetString(&ConfigurationFile, CUPS_SERVERROOT "/cupsd.conf");
if (!CupsFilesFile)
{
char *filename, /* Copy of cupsd.conf filename */
*slash; /* Final slash in cupsd.conf filename */
size_t len; /* Size of buffer */
len = strlen(ConfigurationFile) + 15;
if ((filename = malloc(len)) == NULL)
{
_cupsLangPrintf(stderr,
_("cupsd: Unable to get path to "
"cups-files.conf file."));
return (1);
}
strlcpy(filename, ConfigurationFile, len);
if ((slash = strrchr(filename, '/')) == NULL)
{
free(filename);
_cupsLangPrintf(stderr,
_("cupsd: Unable to get path to "
"cups-files.conf file."));
return (1);
}
strlcpy(slash, "/cups-files.conf", len - (size_t)(slash - filename));
cupsdSetString(&CupsFilesFile, filename);
free(filename);
}
if (disconnect)
{
/*
* Make sure we aren't tying up any filesystems...
*/
chdir("/");
/*
* Disconnect from the controlling terminal...
*/
setsid();
}
if (close_all)
{
/*
* Close all open files...
*/
getrlimit(RLIMIT_NOFILE, &limit);
for (i = 0; i < (int)limit.rlim_cur && i < 1024; i ++)
close(i);
/*
* Redirect stdin/out/err to /dev/null...
*/
if ((i = open("/dev/null", O_RDONLY)) != 0)
{
dup2(i, 0);
close(i);
}
if ((i = open("/dev/null", O_WRONLY)) != 1)
{
dup2(i, 1);
close(i);
}
if ((i = open("/dev/null", O_WRONLY)) != 2)
{
dup2(i, 2);
close(i);
}
}
else
LogStderr = cupsFileStderr();
/*
* Run in the background as needed...
*/
if (!fg)
{
/*
* Setup signal handlers for the parent...
*/
#ifdef HAVE_SIGSET /* Use System V signals over POSIX to avoid bugs */
sigset(SIGUSR1, parent_handler);
sigset(SIGCHLD, parent_handler);
sigset(SIGHUP, SIG_IGN);
#elif defined(HAVE_SIGACTION)
memset(&action, 0, sizeof(action));
sigemptyset(&action.sa_mask);
sigaddset(&action.sa_mask, SIGUSR1);
action.sa_handler = parent_handler;
sigaction(SIGUSR1, &action, NULL);
sigaction(SIGCHLD, &action, NULL);
sigemptyset(&action.sa_mask);
action.sa_handler = SIG_IGN;
sigaction(SIGHUP, &action, NULL);
#else
signal(SIGUSR1, parent_handler);
signal(SIGCLD, parent_handler);
signal(SIGHUP, SIG_IGN);
#endif /* HAVE_SIGSET */
if (fork() > 0)
{
/*
* OK, wait for the child to startup and send us SIGUSR1 or to crash
* and the OS send us SIGCHLD... We also need to ignore SIGHUP which
* might be sent by the init script to restart the scheduler...
*/
for (; parent_signal == 0;)
sleep(1);
if (parent_signal == SIGUSR1)
return (0);
if (wait(&i) < 0)
{
perror("cupsd");
return (1);
}
else if (WIFEXITED(i))
{
fprintf(stderr, "cupsd: Child exited with status %d\n",
WEXITSTATUS(i));
return (2);
}
else
{
fprintf(stderr, "cupsd: Child exited on signal %d\n", WTERMSIG(i));
return (3);
}
}
#if defined(__OpenBSD__) && OpenBSD < 201211
/*
* Call _thread_sys_closefrom() so the child process doesn't reset the
* parent's file descriptors to be blocking. This is a workaround for a
* limitation of userland libpthread on older versions of OpenBSD.
*/
_thread_sys_closefrom(0);
#endif /* __OpenBSD__ && OpenBSD < 201211 */
/*
* Since many system libraries create fork-unsafe data on execution of a
* program, we need to re-execute the background cupsd with the "-C" and "-s"
* options to avoid problems. Unfortunately, we also have to assume that
* argv[0] contains the name of the cupsd executable - there is no portable
* way to get the real pathname...
*/
execlp(argv[0], argv[0], "-C", ConfigurationFile, "-s", CupsFilesFile, (char *)0);
exit(errno);
}
/*
* Let the system know we are busy while we bring up cupsd...
*/
cupsdSetBusyState(1);
/*
* Set the timezone info...
*/
tzset();
#ifdef LC_TIME
setlocale(LC_TIME, "");
#endif /* LC_TIME */
#ifdef HAVE_DBUS_THREADS_INIT
/*
* Enable threading support for D-BUS...
*/
dbus_threads_init_default();
#endif /* HAVE_DBUS_THREADS_INIT */
/*
* Set the maximum number of files...
*/
getrlimit(RLIMIT_NOFILE, &limit);
#if !defined(HAVE_POLL) && !defined(HAVE_EPOLL) && !defined(HAVE_KQUEUE)
if (limit.rlim_max > FD_SETSIZE)
MaxFDs = FD_SETSIZE;
else
#endif /* !HAVE_POLL && !HAVE_EPOLL && !HAVE_KQUEUE */
#ifdef RLIM_INFINITY
if (limit.rlim_max == RLIM_INFINITY)
MaxFDs = 16384;
else
#endif /* RLIM_INFINITY */
MaxFDs = limit.rlim_max;
limit.rlim_cur = (rlim_t)MaxFDs;
setrlimit(RLIMIT_NOFILE, &limit);
cupsdStartSelect();
/*
* Read configuration...
*/
if (!cupsdReadConfiguration())
return (1);
else if (TestConfigFile)
{
printf("\"%s\" is OK.\n", CupsFilesFile);
printf("\"%s\" is OK.\n", ConfigurationFile);
return (0);
}
else if (print_profile)
{
cups_file_t *fp; /* File pointer */
const char *profile = cupsdCreateProfile(42, 0);
/* Profile */
char line[1024]; /* Line from file */
if ((fp = cupsFileOpen(profile, "r")) == NULL)
{
printf("Unable to open profile file \"%s\": %s\n", profile ? profile : "(null)", strerror(errno));
return (1);
}
while (cupsFileGets(fp, line, sizeof(line)))
puts(line);
cupsFileClose(fp);
return (0);
}
/*
* Clean out old temp files and printer cache data.
*/
if (!strncmp(TempDir, RequestRoot, strlen(RequestRoot)))
cupsdCleanFiles(TempDir, NULL);
cupsdCleanFiles(CacheDir, "*.ipp");
/*
* If we were started on demand by launchd or systemd get the listen sockets
* file descriptors...
*/
service_checkin();
service_checkout(0);
/*
* Startup the server...
*/
httpInitialize();
cupsdStartServer();
/*
* Catch hangup and child signals and ignore broken pipes...
*/
#ifdef HAVE_SIGSET /* Use System V signals over POSIX to avoid bugs */
sigset(SIGCHLD, sigchld_handler);
sigset(SIGHUP, sighup_handler);
sigset(SIGPIPE, SIG_IGN);
sigset(SIGTERM, sigterm_handler);
#elif defined(HAVE_SIGACTION)
memset(&action, 0, sizeof(action));
sigemptyset(&action.sa_mask);
sigaddset(&action.sa_mask, SIGTERM);
sigaddset(&action.sa_mask, SIGCHLD);
action.sa_handler = sigchld_handler;
sigaction(SIGCHLD, &action, NULL);
sigemptyset(&action.sa_mask);
sigaddset(&action.sa_mask, SIGHUP);
action.sa_handler = sighup_handler;
sigaction(SIGHUP, &action, NULL);
sigemptyset(&action.sa_mask);
action.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &action, NULL);
sigemptyset(&action.sa_mask);
sigaddset(&action.sa_mask, SIGTERM);
sigaddset(&action.sa_mask, SIGCHLD);
action.sa_handler = sigterm_handler;
sigaction(SIGTERM, &action, NULL);
#else
signal(SIGCLD, sigchld_handler); /* No, SIGCLD isn't a typo... */
signal(SIGHUP, sighup_handler);
signal(SIGPIPE, SIG_IGN);
signal(SIGTERM, sigterm_handler);
#endif /* HAVE_SIGSET */
/*
* Initialize authentication certificates...
*/
cupsdInitCerts();
/*
* If we are running in the background, signal the parent process that
* we are up and running...
*/
if (!fg || run_as_child)
{
/*
* Send a signal to the parent process, but only if the parent is
* not PID 1 (init). This avoids accidentally shutting down the
* system on OpenBSD if you CTRL-C the server before it is up...
*/
i = getppid(); /* Save parent PID to avoid race condition */
if (i != 1)
kill(i, SIGUSR1);
}
#ifdef __APPLE__
/*
* Start power management framework...
*/
if (use_sysman)
cupsdStartSystemMonitor();
#endif /* __APPLE__ */
/*
* Send server-started event...
*/
#ifdef HAVE_ONDEMAND
if (OnDemand)
cupsdAddEvent(CUPSD_EVENT_SERVER_STARTED, NULL, NULL, "Scheduler started on demand.");
else
#endif /* HAVE_ONDEMAND */
if (fg)
cupsdAddEvent(CUPSD_EVENT_SERVER_STARTED, NULL, NULL, "Scheduler started in foreground.");
else
cupsdAddEvent(CUPSD_EVENT_SERVER_STARTED, NULL, NULL, "Scheduler started in background.");
cupsdSetBusyState(0);
/*
* Start any pending print jobs...
*/
cupsdCheckJobs();
/*
* Loop forever...
*/
current_time = time(NULL);
event_time = current_time;
expire_time = current_time;
local_timeout = 0;
fds = 1;
report_time = 0;
senddoc_time = current_time;
while (!stop_scheduler)
{
/*
* Check if there are dead children to handle...
*/
if (dead_children)
process_children();
/*
* Check if we need to load the server configuration file...
*/
if (NeedReload)
{
/*
* Close any idle clients...
*/
if (cupsArrayCount(Clients) > 0)
{
for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
con;
con = (cupsd_client_t *)cupsArrayNext(Clients))
if (httpGetState(con->http) == HTTP_WAITING)
cupsdCloseClient(con);
else
con->http->keep_alive = HTTP_KEEPALIVE_OFF;
cupsdPauseListening();
}
/*
* Restart if all clients are closed and all jobs finished, or
* if the reload timeout has elapsed...
*/
if ((cupsArrayCount(Clients) == 0 &&
(cupsArrayCount(PrintingJobs) == 0 || NeedReload != RELOAD_ALL)) ||
(time(NULL) - ReloadTime) >= ReloadTimeout)
{
/*
* Shutdown the server...
*/
#ifdef HAVE_ONDEMAND
if (OnDemand)
{
# ifndef HAVE_SYSTEMD /* Issue #5640: systemd doesn't actually support launch-on-demand services, need to fake it */
stop_scheduler = 1;
# endif /* HAVE_SYSTEMD */
break;
}
#endif /* HAVE_ONDEMAND */
DoingShutdown = 1;
cupsdStopServer();
/*
* Read configuration...
*/
if (!cupsdReadConfiguration())
{
#ifdef HAVE_SYSTEMD_SD_JOURNAL_H
sd_journal_print(LOG_ERR, "Unable to read configuration file \"%s\" - exiting.", ConfigurationFile);
#else
syslog(LOG_LPR, "Unable to read configuration file \'%s\' - exiting.", ConfigurationFile);
#endif /* HAVE_SYSTEMD_SD_JOURNAL_H */
break;
}
/*
* Startup the server...
*/
DoingShutdown = 0;
cupsdStartServer();
/*
* Send a server-restarted event...
*/
cupsdAddEvent(CUPSD_EVENT_SERVER_RESTARTED, NULL, NULL,
"Scheduler restarted.");
}
}
/*
* Check for available input or ready output. If cupsdDoSelect()
* returns 0 or -1, something bad happened and we should exit
* immediately.
*
* Note that we at least have one listening socket open at all
* times.
*/
if ((timeout = select_timeout(fds)) > 1 && LastEvent)
timeout = 1;
#ifdef HAVE_ONDEMAND
/*
* If no other work is scheduled and we're being controlled by launchd,
* systemd, etc. then timeout after 'IdleExitTimeout' seconds of
* inactivity...
*/
if (timeout == 86400 && OnDemand && IdleExitTimeout &&
# ifdef HAVE_SYSTEMD
!WebInterface &&
# endif /* HAVE_SYSTEMD */
!cupsArrayCount(ActiveJobs))
{
cupsd_printer_t *p = NULL; /* Current printer */
if (Browsing && BrowseLocalProtocols)
{
for (p = (cupsd_printer_t *)cupsArrayFirst(Printers); p; p = (cupsd_printer_t *)cupsArrayNext(Printers))
if (p->shared)
break;
}
if (!p)
{
timeout = IdleExitTimeout;
service_idle_exit = 1;
}
}
else
service_idle_exit = 0;
#endif /* HAVE_ONDEMAND */
if ((fds = cupsdDoSelect(timeout)) < 0)
{
/*
* Got an error from select!
*/
#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
cupsd_printer_t *p; /* Current printer */
#endif /* HAVE_DNSSD || HAVE_AVAHI */
if (errno == EINTR) /* Just interrupted by a signal */
continue;
/*
* Log all sorts of debug info to help track down the problem.
*/
cupsdLogMessage(CUPSD_LOG_EMERG, "cupsdDoSelect() failed - %s!",
strerror(errno));
for (i = 0, con = (cupsd_client_t *)cupsArrayFirst(Clients);
con;
i ++, con = (cupsd_client_t *)cupsArrayNext(Clients))
cupsdLogMessage(CUPSD_LOG_EMERG,
"Clients[%d] = %d, file = %d, state = %d",
i, con->number, con->file, httpGetState(con->http));
for (i = 0, lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
lis;
i ++, lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
cupsdLogMessage(CUPSD_LOG_EMERG, "Listeners[%d] = %d", i, lis->fd);
cupsdLogMessage(CUPSD_LOG_EMERG, "CGIPipes[0] = %d", CGIPipes[0]);
#ifdef __APPLE__
cupsdLogMessage(CUPSD_LOG_EMERG, "SysEventPipes[0] = %d",
SysEventPipes[0]);
#endif /* __APPLE__ */
for (job = (cupsd_job_t *)cupsArrayFirst(ActiveJobs);
job;
job = (cupsd_job_t *)cupsArrayNext(ActiveJobs))
cupsdLogMessage(CUPSD_LOG_EMERG, "Jobs[%d] = %d < [%d %d] > [%d %d]",
job->id,
job->status_buffer ? job->status_buffer->fd : -1,
job->print_pipes[0], job->print_pipes[1],
job->back_pipes[0], job->back_pipes[1]);
#if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
for (p = (cupsd_printer_t *)cupsArrayFirst(Printers);
p;
p = (cupsd_printer_t *)cupsArrayNext(Printers))
cupsdLogMessage(CUPSD_LOG_EMERG, "printer[%s] reg_name=\"%s\"", p->name,
p->reg_name ? p->reg_name : "(null)");
#endif /* HAVE_DNSSD || HAVE_AVAHI */
break;
}
current_time = time(NULL);
/*
* Write dirty config/state files...
*/
if (DirtyCleanTime && current_time >= DirtyCleanTime)
cupsdCleanDirty();
#ifdef __APPLE__
/*
* If we are going to sleep and still have pending jobs, stop them after
* a period of time...
*/
if (SleepJobs > 0 && current_time >= SleepJobs &&
cupsArrayCount(PrintingJobs) > 0)
{
SleepJobs = 0;
cupsdStopAllJobs(CUPSD_JOB_DEFAULT, 5);
}
#endif /* __APPLE__ */
#ifndef __APPLE__
/*
* Update the network interfaces once a minute...
*/
if ((current_time - netif_time) >= 60)
{
netif_time = current_time;
NetIFUpdate = 1;
}
#endif /* !__APPLE__ */
#ifdef HAVE_ONDEMAND
/*
* If no other work was scheduled and we're being controlled by launchd,
* systemd, or upstart then timeout after 'LaunchdTimeout' seconds of
* inactivity...
*/
if (!fds && service_idle_exit)
{
cupsdLogMessage(CUPSD_LOG_INFO,
"Printer sharing is off and there are no jobs pending, "
"will restart on demand.");
stop_scheduler = 1;
break;
}
#endif /* HAVE_ONDEMAND */
/*
* Resume listening for new connections as needed...
*/
if (ListeningPaused && ListeningPaused <= current_time &&
cupsArrayCount(Clients) < MaxClients)
cupsdResumeListening();
/*
* Expire subscriptions and unload completed jobs as needed...
*/
if (current_time > expire_time)
{
cupsdExpireSubscriptions(NULL, NULL);
cupsdUnloadCompletedJobs();
expire_time = current_time;
}
/*
* Delete stale local printers...
*/
if (current_time >= local_timeout)
{
cupsdDeleteTemporaryPrinters(0);
local_timeout = 0;
}
#ifndef HAVE_AUTHORIZATION_H
/*
* Update the root certificate once every 5 minutes if we have client
* connections...
*/
if ((current_time - RootCertTime) >= RootCertDuration && RootCertDuration &&
!RunUser && cupsArrayCount(Clients))
{
/*
* Update the root certificate...
*/
cupsdDeleteCert(0);
cupsdAddCert(0, "root", cupsdDefaultAuthType());
}
#endif /* !HAVE_AUTHORIZATION_H */
/*
* Clean job history...
*/
if (JobHistoryUpdate && current_time >= JobHistoryUpdate)
cupsdCleanJobs();
/*
* Update any pending multi-file documents...
*/
if ((current_time - senddoc_time) >= 10)
{
cupsdCheckJobs();
senddoc_time = current_time;
}
/*
* Check for new data on the client sockets...
*/
for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
con;
con = (cupsd_client_t *)cupsArrayNext(Clients))
{
/*
* Process pending data in the input buffer...
*/
if (httpGetReady(con->http))
{
cupsdReadClient(con);
continue;
}
/*
* Check the activity and close old clients...
*/
activity = current_time - Timeout;
if (httpGetActivity(con->http) < activity && !con->pipe_pid)
{
cupsdLogMessage(CUPSD_LOG_DEBUG, "Closing client %d after %d seconds of inactivity.", con->number, Timeout);
cupsdCloseClient(con);
continue;
}
}
/*
* Log statistics at most once a minute when in debug mode...
*/
if ((current_time - report_time) >= 60 && LogLevel >= CUPSD_LOG_DEBUG)
{
size_t string_count, /* String count */
alloc_bytes, /* Allocated string bytes */
total_bytes; /* Total string bytes */
#ifdef HAVE_MALLINFO
struct mallinfo mem; /* Malloc information */
mem = mallinfo();
cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: malloc-arena=%lu", mem.arena);
cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: malloc-used=%lu",
mem.usmblks + mem.uordblks);
cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: malloc-free=%lu",
mem.fsmblks + mem.fordblks);
#endif /* HAVE_MALLINFO */
cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: clients=%d",
cupsArrayCount(Clients));
cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: jobs=%d",
cupsArrayCount(Jobs));
cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: jobs-active=%d",
cupsArrayCount(ActiveJobs));
cupsdLogMessage(CUPSD_LOG_DEBUG, "Report: printers=%d",
cupsArrayCount(Printers));
string_count = _cupsStrStatistics(&alloc_bytes, &total_bytes);
cupsdLogMessage(CUPSD_LOG_DEBUG,
"Report: stringpool-string-count=" CUPS_LLFMT,
CUPS_LLCAST string_count);
cupsdLogMessage(CUPSD_LOG_DEBUG,
"Report: stringpool-alloc-bytes=" CUPS_LLFMT,
CUPS_LLCAST alloc_bytes);
cupsdLogMessage(CUPSD_LOG_DEBUG,
"Report: stringpool-total-bytes=" CUPS_LLFMT,
CUPS_LLCAST total_bytes);
report_time = current_time;
}
/*
* Handle OS-specific event notification for any events that have
* accumulated. Don't send these more than once a second...
*/
if (LastEvent && (current_time - event_time) >= 1)
{
#ifdef HAVE_NOTIFY_POST
if (LastEvent & (CUPSD_EVENT_PRINTER_ADDED |
CUPSD_EVENT_PRINTER_DELETED |
CUPSD_EVENT_PRINTER_MODIFIED))
{
cupsdLogMessage(CUPSD_LOG_DEBUG2,
"notify_post(\"com.apple.printerListChange\")");
notify_post("com.apple.printerListChange");
}
if (LastEvent & CUPSD_EVENT_PRINTER_STATE_CHANGED)
{
cupsdLogMessage(CUPSD_LOG_DEBUG2,
"notify_post(\"com.apple.printerHistoryChange\")");
notify_post("com.apple.printerHistoryChange");
}
if (LastEvent & (CUPSD_EVENT_JOB_STATE_CHANGED |
CUPSD_EVENT_JOB_CONFIG_CHANGED |
CUPSD_EVENT_JOB_PROGRESS))
{
cupsdLogMessage(CUPSD_LOG_DEBUG2,
"notify_post(\"com.apple.jobChange\")");
notify_post("com.apple.jobChange");
}
#endif /* HAVE_NOTIFY_POST */
/*
* Reset the accumulated events...
*/
LastEvent = CUPSD_EVENT_NONE;
event_time = current_time;
}
}
/*
* Log a message based on what happened...
*/
if (stop_scheduler)
{
cupsdLogMessage(CUPSD_LOG_INFO, "Scheduler shutting down normally.");
cupsdAddEvent(CUPSD_EVENT_SERVER_STOPPED, NULL, NULL,
"Scheduler shutting down normally.");
}
else
{
cupsdLogMessage(CUPSD_LOG_ERROR,
"Scheduler shutting down due to program error.");
cupsdAddEvent(CUPSD_EVENT_SERVER_STOPPED, NULL, NULL,
"Scheduler shutting down due to program error.");
}
/*
* Close all network clients...
*/
DoingShutdown = 1;
cupsdStopServer();
/*
* Update the KeepAlive/PID file as needed...
*/
service_checkout(1);
/*
* Stop all jobs...
*/
cupsdFreeAllJobs();
/*
* Delete all temporary printers...
*/
cupsdDeleteTemporaryPrinters(1);
#ifdef __APPLE__
/*
* Stop monitoring system event monitoring...
*/
if (use_sysman)
cupsdStopSystemMonitor();
#endif /* __APPLE__ */
cupsdStopSelect();
return (!stop_scheduler);
}
/*
* 'cupsdAddString()' - Copy and add a string to an array.
*/
int /* O - 1 on success, 0 on failure */
cupsdAddString(cups_array_t **a, /* IO - String array */
const char *s) /* I - String to copy and add */
{
if (!*a)
*a = cupsArrayNew3((cups_array_func_t)strcmp, NULL,
(cups_ahash_func_t)NULL, 0,
(cups_acopy_func_t)strdup,
(cups_afree_func_t)free);
return (cupsArrayAdd(*a, (char *)s));
}
/*
* 'cupsdCheckProcess()' - Tell the main loop to check for dead children.
*/
void
cupsdCheckProcess(void)
{
/*
* Flag that we have dead children...
*/
dead_children = 1;
}
/*
* 'cupsdClearString()' - Clear a string.
*/
void
cupsdClearString(char **s) /* O - String value */
{
if (s && *s)
{
free(*s);
*s = NULL;
}
}
/*
* 'cupsdFreeStrings()' - Free an array of strings.
*/
void
cupsdFreeStrings(cups_array_t **a) /* IO - String array */
{
if (*a)
{
cupsArrayDelete(*a);
*a = NULL;
}
}
/*
* 'cupsdHoldSignals()' - Hold child and termination signals.
*/
void
cupsdHoldSignals(void)
{
#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
sigset_t newmask; /* New POSIX signal mask */
#endif /* HAVE_SIGACTION && !HAVE_SIGSET */
holdcount ++;
if (holdcount > 1)
return;
#ifdef HAVE_SIGSET
sighold(SIGTERM);
sighold(SIGCHLD);
#elif defined(HAVE_SIGACTION)
sigemptyset(&newmask);
sigaddset(&newmask, SIGTERM);
sigaddset(&newmask, SIGCHLD);
sigprocmask(SIG_BLOCK, &newmask, &holdmask);
#endif /* HAVE_SIGSET */
}
/*
* 'cupsdReleaseSignals()' - Release signals for delivery.
*/
void
cupsdReleaseSignals(void)
{
holdcount --;
if (holdcount > 0)
return;
#ifdef HAVE_SIGSET
sigrelse(SIGTERM);
sigrelse(SIGCHLD);
#elif defined(HAVE_SIGACTION)
sigprocmask(SIG_SETMASK, &holdmask, NULL);
#endif /* HAVE_SIGSET */
}
/*
* 'cupsdSetString()' - Set a string value.
*/
void
cupsdSetString(char **s, /* O - New string */
const char *v) /* I - String value */
{
if (!s || *s == v)
return;
if (*s)
free(*s);
if (v)
*s = strdup(v);
else
*s = NULL;
}
/*
* 'cupsdSetStringf()' - Set a formatted string value.
*/
void
cupsdSetStringf(char **s, /* O - New string */
const char *f, /* I - Printf-style format string */
...) /* I - Additional args as needed */
{
char v[65536 + 64]; /* Formatting string value */
va_list ap; /* Argument pointer */
char *olds; /* Old string */
if (!s)
return;
olds = *s;
if (f)
{
va_start(ap, f);
vsnprintf(v, sizeof(v), f, ap);
va_end(ap);
*s = strdup(v);
}
else
*s = NULL;
if (olds)
free(olds);
}
/*
* 'parent_handler()' - Catch USR1/CHLD signals...
*/
static void
parent_handler(int sig) /* I - Signal */
{
/*
* Store the signal we got from the OS and return...
*/
parent_signal = sig;
}
/*
* 'process_children()' - Process all dead children...
*/
static void
process_children(void)
{
int status; /* Exit status of child */
int pid, /* Process ID of child */
job_id; /* Job ID of child */
cupsd_job_t *job; /* Current job */
int i; /* Looping var */
char name[1024]; /* Process name */
const char *type; /* Type of program */
cupsdLogMessage(CUPSD_LOG_DEBUG2, "process_children()");
/*
* Reset the dead_children flag...
*/
dead_children = 0;
/*
* Collect the exit status of some children...
*/
#ifdef HAVE_WAITPID
while ((pid = waitpid(-1, &status, WNOHANG)) > 0)
#elif defined(HAVE_WAIT3)
while ((pid = wait3(&status, WNOHANG, NULL)) > 0)
#else
if ((pid = wait(&status)) > 0)
#endif /* HAVE_WAITPID */
{
/*
* Collect the name of the process that finished...
*/
cupsdFinishProcess(pid, name, sizeof(name), &job_id);
/*
* Delete certificates for CGI processes...
*/
if (pid)
cupsdDeleteCert(pid);
/*
* Handle completed job filters...
*/
if (job_id > 0)
job = cupsdFindJob(job_id);
else
job = NULL;
if (job)
{
for (i = 0; job->filters[i]; i ++)
if (job->filters[i] == pid)
break;
if (job->filters[i] || job->backend == pid)
{
/*
* OK, this process has gone away; what's left?
*/
if (job->filters[i])
{
job->filters[i] = -pid;
type = "Filter";
}
else
{
job->backend = -pid;
type = "Backend";
}
if (status && status != SIGTERM && status != SIGKILL &&
status != SIGPIPE)
{
/*
* An error occurred; save the exit status so we know to stop
* the printer or cancel the job when all of the filters finish...
*
* A negative status indicates that the backend failed and the
* printer needs to be stopped.
*
* In order to preserve the most serious status, we always log
* when a process dies due to a signal (e.g. SIGABRT, SIGSEGV,
* and SIGBUS) and prefer to log the backend exit status over a
* filter's.
*/
int old_status = abs(job->status);
if (WIFSIGNALED(status) || /* This process crashed, or */
!job->status || /* No process had a status, or */
(!job->filters[i] && WIFEXITED(old_status)))
{ /* Backend and filter didn't crash */
if (job->filters[i])
{
job->status = status; /* Filter failed */
}
else
{
job->status = -status; /* Backend failed */
if (job->current_file < job->num_files)
cupsdSetJobState(job, IPP_JOB_ABORTED, CUPSD_JOB_FORCE, "Canceling multi-file job due to backend failure.");
}
}
if (job->state_value == IPP_JOB_PROCESSING &&
job->status_level > CUPSD_LOG_ERROR &&
(job->filters[i] || !WIFEXITED(status)))
{
char message[1024]; /* New printer-state-message */
job->status_level = CUPSD_LOG_ERROR;
snprintf(message, sizeof(message), "%s failed", type);
if (job->printer)
{
strlcpy(job->printer->state_message, message,
sizeof(job->printer->state_message));
}
if (!job->attrs)
cupsdLoadJob(job);
if (!job->printer_message && job->attrs)
{
if ((job->printer_message =
ippFindAttribute(job->attrs, "job-printer-state-message",
IPP_TAG_TEXT)) == NULL)
job->printer_message = ippAddString(job->attrs, IPP_TAG_JOB,
IPP_TAG_TEXT,
"job-printer-state-message",
NULL, NULL);
}
if (job->printer_message)
ippSetString(job->attrs, &job->printer_message, 0, message);
}
}
/*
* If this is not the last file in a job, see if all of the
* filters are done, and if so move to the next file.
*/
if (job->state_value >= IPP_JOB_CANCELED)
{
/*
* Remove the job from the active list if there are no processes still
* running for it...
*/
for (i = 0; job->filters[i] < 0; i++);
if (!job->filters[i] && job->backend <= 0)
cupsArrayRemove(ActiveJobs, job);
}
else if (job->current_file < job->num_files && job->printer)
{
for (i = 0; job->filters[i] < 0; i ++);
if (!job->filters[i] &&
(!job->printer->pc || !job->printer->pc->single_file ||
job->backend <= 0))
{
/*
* Process the next file...
*/
cupsdContinueJob(job);
}
}
}
}
/*
* Show the exit status as needed, ignoring SIGTERM and SIGKILL errors
* since they come when we kill/end a process...
*/
if (status == SIGTERM || status == SIGKILL)
{
cupsdLogJob(job, CUPSD_LOG_DEBUG,
"PID %d (%s) was terminated normally with signal %d.", pid,
name, status);
}
else if (status == SIGPIPE)
{
cupsdLogJob(job, CUPSD_LOG_DEBUG,
"PID %d (%s) did not catch or ignore signal %d.", pid, name,
status);
}
else if (status)
{
if (WIFEXITED(status))
{
int code = WEXITSTATUS(status); /* Exit code */
if (code > 100)
cupsdLogJob(job, CUPSD_LOG_DEBUG,
"PID %d (%s) stopped with status %d (%s)", pid, name,
code, strerror(code - 100));
else
cupsdLogJob(job, CUPSD_LOG_DEBUG,
"PID %d (%s) stopped with status %d.", pid, name, code);
}
else
cupsdLogJob(job, CUPSD_LOG_DEBUG, "PID %d (%s) crashed on signal %d.",
pid, name, WTERMSIG(status));
if (LogLevel < CUPSD_LOG_DEBUG)
cupsdLogJob(job, CUPSD_LOG_INFO,
"Hint: Try setting the LogLevel to \"debug\" to find out "
"more.");
}
else
cupsdLogJob(job, CUPSD_LOG_DEBUG, "PID %d (%s) exited with no errors.",
pid, name);
}
/*
* If wait*() is interrupted by a signal, tell main() to call us again...
*/
if (pid < 0 && errno == EINTR)
dead_children = 1;
}
/*
* 'select_timeout()' - Calculate the select timeout value.
*
*/
static long /* O - Number of seconds */
select_timeout(int fds) /* I - Number of descriptors returned */
{
long timeout; /* Timeout for select */
time_t now; /* Current time */
cupsd_client_t *con; /* Client information */
cupsd_job_t *job; /* Job information */
const char *why; /* Debugging aid */
cupsdLogMessage(CUPSD_LOG_DEBUG2, "select_timeout: JobHistoryUpdate=%ld",
(long)JobHistoryUpdate);
/*
* Check to see if any of the clients have pending data to be
* processed; if so, the timeout should be 0...
*/
for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
con;
con = (cupsd_client_t *)cupsArrayNext(Clients))
if (httpGetReady(con->http))
return (0);
/*
* If select has been active in the last second (fds > 0) or we have
* many resources in use then don't bother trying to optimize the
* timeout, just make it 1 second.
*/
if (fds > 0 || cupsArrayCount(Clients) > 50)
return (1);
/*
* Otherwise, check all of the possible events that we need to wake for...
*/
now = time(NULL);
timeout = now + 86400; /* 86400 == 1 day */
why = "do nothing";
#ifdef __APPLE__
/*
* When going to sleep, wake up to abort jobs that don't complete in time.
*/
if (SleepJobs > 0 && SleepJobs < timeout)
{
timeout = SleepJobs;
why = "abort jobs before sleeping";
}
#endif /* __APPLE__ */
/*
* Check whether we are accepting new connections...
*/
if (ListeningPaused > 0 && cupsArrayCount(Clients) < MaxClients &&
ListeningPaused < timeout)
{
if (ListeningPaused <= now)
timeout = now;
else
timeout = ListeningPaused;
why = "resume listening";
}
/*
* Check the activity and close old clients...
*/
for (con = (cupsd_client_t *)cupsArrayFirst(Clients);
con;
con = (cupsd_client_t *)cupsArrayNext(Clients))
if ((httpGetActivity(con->http) + Timeout) < timeout)
{
timeout = httpGetActivity(con->http) + Timeout;
why = "timeout a client connection";
}
/*
* Write out changes to configuration and state files...
*/
if (DirtyCleanTime && timeout > DirtyCleanTime)
{
timeout = DirtyCleanTime;
why = "write dirty config/state files";
}
/*
* Check for any job activity...
*/
for (job = (cupsd_job_t *)cupsArrayFirst(ActiveJobs);
job;
job = (cupsd_job_t *)cupsArrayNext(ActiveJobs))
{
if (job->cancel_time && job->cancel_time < timeout)
{
timeout = job->cancel_time;
why = "cancel stuck jobs";
}
if (job->kill_time && job->kill_time < timeout)
{
timeout = job->kill_time;
why = "kill unresponsive jobs";
}
if (job->state_value == IPP_JOB_HELD && job->hold_until < timeout)
{
timeout = job->hold_until;
why = "release held jobs";
}
if (job->state_value == IPP_JOB_PENDING && timeout > (now + 10))
{
timeout = now + 10;
why = "start pending jobs";
break;
}
}
/*
* Adjust from absolute to relative time. We add 1 second to the timeout since
* events occur after the timeout expires, and limit the timeout to 86400
* seconds (1 day) to avoid select() timeout limits present on some operating
* systems...
*/
timeout = timeout - now + 1;
if (timeout < 1)
timeout = 1;
else if (timeout > 86400)
timeout = 86400;
/*
* Log and return the timeout value...
*/
cupsdLogMessage(CUPSD_LOG_DEBUG2, "select_timeout(%d): %ld seconds to %s",
fds, timeout, why);
return (timeout);
}
/*
* 'sigchld_handler()' - Handle 'child' signals from old processes.
*/
static void
sigchld_handler(int sig) /* I - Signal number */
{
(void)sig;
/*
* Flag that we have dead children...
*/
dead_children = 1;
/*
* Reset the signal handler as needed...
*/
#if !defined(HAVE_SIGSET) && !defined(HAVE_SIGACTION)
signal(SIGCLD, sigchld_handler);
#endif /* !HAVE_SIGSET && !HAVE_SIGACTION */
}
/*
* 'sighup_handler()' - Handle 'hangup' signals to reconfigure the scheduler.
*/
static void
sighup_handler(int sig) /* I - Signal number */
{
(void)sig;
NeedReload = RELOAD_ALL;
ReloadTime = time(NULL);
#if !defined(HAVE_SIGSET) && !defined(HAVE_SIGACTION)
signal(SIGHUP, sighup_handler);
#endif /* !HAVE_SIGSET && !HAVE_SIGACTION */
}
/*
* 'sigterm_handler()' - Handle 'terminate' signals that stop the scheduler.
*/
static void
sigterm_handler(int sig) /* I - Signal number */
{
(void)sig; /* remove compiler warnings... */
/*
* Flag that we should stop and return...
*/
stop_scheduler = 1;
}
#ifdef HAVE_ONDEMAND
/*
* 'service_add_listener()' - Bind an open fd as a Listener.
*/
static void
service_add_listener(int fd, /* I - Socket file descriptor */
int idx) /* I - Listener number, for logging */
{
cupsd_listener_t *lis; /* Listeners array */
http_addr_t addr; /* Address variable */
socklen_t addrlen; /* Length of address */
char s[256]; /* String addresss */
addrlen = sizeof(addr);
if (getsockname(fd, (struct sockaddr *)&addr, &addrlen))
{
cupsdLogMessage(CUPSD_LOG_ERROR, "service_add_listener: Unable to get local address for listener #%d: %s", idx + 1, strerror(errno));
return;
}
cupsdLogMessage(CUPSD_LOG_DEBUG, "service_add_listener: Listener #%d at fd %d, \"%s\".", idx + 1, fd, httpAddrString(&addr, s, sizeof(s)));
/*
* Try to match the on-demand socket address to one of the listeners...
*/
for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
lis;
lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
if (httpAddrEqual(&lis->address, &addr))
break;
/*
* Add a new listener If there's no match...
*/
if (lis)
{
cupsdLogMessage(CUPSD_LOG_DEBUG, "service_add_listener: Matched existing listener #%d to %s.", idx + 1, httpAddrString(&(lis->address), s, sizeof(s)));
}
else
{
cupsdLogMessage(CUPSD_LOG_DEBUG, "service_add_listener: Adding new listener #%d for %s.", idx + 1, httpAddrString(&addr, s, sizeof(s)));
if ((lis = calloc(1, sizeof(cupsd_listener_t))) == NULL)
{
cupsdLogMessage(CUPSD_LOG_ERROR, "service_add_listener: Unable to allocate listener: %s.", strerror(errno));
exit(EXIT_FAILURE);
return;
}
cupsArrayAdd(Listeners, lis);
memcpy(&lis->address, &addr, sizeof(lis->address));
}
lis->fd = fd;
lis->on_demand = 1;
# ifdef HAVE_SSL
if (httpAddrPort(&(lis->address)) == 443)
lis->encryption = HTTP_ENCRYPT_ALWAYS;
# endif /* HAVE_SSL */
}
#endif /* HAVE_ONDEMAND */
/*
* 'service_checkin()' - Check-in with launchd and collect the listening fds.
*/
static void
service_checkin(void)
{
cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: pid=%d", (int)getpid());
#ifdef HAVE_LAUNCHD
if (OnDemand)
{
int error; /* Check-in error, if any */
size_t i, /* Looping var */
count; /* Number of listeners */
int *ld_sockets; /* Listener sockets */
# ifdef __APPLE__
/*
* Force "user initiated" priority for the main thread...
*/
pthread_set_qos_class_self_np(QOS_CLASS_USER_INITIATED, 0);
# endif /* __APPLE__ */
/*
* Check-in with launchd...
*/
if ((error = launch_activate_socket("Listeners", &ld_sockets, &count)) != 0)
{
cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Unable to get listener sockets: %s", strerror(error));
exit(EXIT_FAILURE);
return; /* anti-compiler-warning */
}
/*
* Try to match the launchd sockets to the cupsd listeners...
*/
cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: %d listeners.", (int)count);
for (i = 0; i < count; i ++)
service_add_listener(ld_sockets[i], (int)i);
free(ld_sockets);
# ifdef __APPLE__
xpc_transaction_begin();
# endif /* __APPLE__ */
}
#elif defined(HAVE_SYSTEMD)
if (OnDemand)
{
int i, /* Looping var */
count; /* Number of listeners */
/*
* Check-in with systemd...
*/
if ((count = sd_listen_fds(0)) < 0)
{
cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Unable to get listener sockets: %s", strerror(-count));
exit(EXIT_FAILURE);
return; /* anti-compiler-warning */
}
/*
* Try to match the systemd sockets to the cupsd listeners...
*/
cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: %d listeners.", count);
for (i = 0; i < count; i ++)
service_add_listener(SD_LISTEN_FDS_START + i, i);
}
#elif defined(HAVE_UPSTART)
if (OnDemand)
{
const char *e; /* Environment var */
int fd; /* File descriptor */
if (!(e = getenv("UPSTART_EVENTS")))
{
cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: We did not get started via Upstart.");
exit(EXIT_FAILURE);
return;
}
if (strcasecmp(e, "socket"))
{
cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: We did not get triggered via an Upstart socket event.");
exit(EXIT_FAILURE);
return;
}
if ((e = getenv("UPSTART_FDS")) == NULL)
{
cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Unable to get listener sockets from UPSTART_FDS.");
exit(EXIT_FAILURE);
return;
}
cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: UPSTART_FDS=%s", e);
fd = (int)strtol(e, NULL, 10);
if (fd < 0)
{
cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Could not parse UPSTART_FDS: %s", strerror(errno));
exit(EXIT_FAILURE);
return;
}
/*
* Upstart only supportst a single on-demand socket file descriptor...
*/
service_add_listener(fd, 0);
}
#endif /* HAVE_LAUNCHD */
}
/*
* 'service_checkout()' - Update the KeepAlive/PID file as needed.
*/
static void
service_checkout(int shutdown) /* I - Shutting down? */
{
cups_file_t *fp; /* File */
char pidfile[1024]; /* PID/KeepAlive file */
/*
* When running on-demand, use the KeepAlive file, otherwise write a PID file
* to StateDir...
*/
#ifdef HAVE_ONDEMAND
if (OnDemand)
{
int shared_printers = 0; /* Do we have shared printers? */
strlcpy(pidfile, CUPS_KEEPALIVE, sizeof(pidfile));
/*
* If printer sharing is on see if there are any actual shared printers...
*/
if (Browsing && BrowseLocalProtocols)
{
cupsd_printer_t *p = NULL; /* Current printer */
for (p = (cupsd_printer_t *)cupsArrayFirst(Printers); p; p = (cupsd_printer_t *)cupsArrayNext(Printers))
{
if (p->shared)
break;
}
shared_printers = (p != NULL);
}
if (cupsArrayCount(ActiveJobs) || /* Active jobs */
WebInterface || /* Web interface enabled */
NeedReload || /* Doing a reload */
shared_printers) /* Printers being shared */
{
/*
* Create or remove the "keep-alive" file based on whether there are active
* jobs or shared printers to advertise...
*/
shutdown = 0;
}
}
else
#endif /* HAVE_ONDEMAND */
snprintf(pidfile, sizeof(pidfile), "%s/cupsd.pid", StateDir);
if (shutdown)
{
cupsdLogMessage(CUPSD_LOG_DEBUG, "Removing KeepAlive/PID file \"%s\".", pidfile);
unlink(pidfile);
}
else
{
cupsdLogMessage(CUPSD_LOG_DEBUG, "Creating KeepAlive/PID file \"%s\".", pidfile);
if ((fp = cupsFileOpen(pidfile, "w")) != NULL)
{
/*
* Save the PID in the file...
*/
cupsFilePrintf(fp, "%d\n", (int)getpid());
cupsFileClose(fp);
}
else
cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to create KeepAlive/PID file \"%s\": %s", pidfile, strerror(errno));
}
# ifdef __APPLE__
if (OnDemand && shutdown)
xpc_transaction_end();
# endif /* __APPLE__ */
}
/*
* 'usage()' - Show scheduler usage.
*/
static void
usage(int status) /* O - Exit status */
{
FILE *fp = status ? stderr : stdout; /* Output file */
_cupsLangPuts(fp, _("Usage: cupsd [options]"));
_cupsLangPuts(fp, _("Options:"));
_cupsLangPuts(fp, _("-c cupsd.conf Set cupsd.conf file to use."));
_cupsLangPuts(fp, _("-f Run in the foreground."));
_cupsLangPuts(fp, _("-F Run in the foreground but detach from console."));
_cupsLangPuts(fp, _("-h Show this usage message."));
#ifdef HAVE_ONDEMAND
_cupsLangPuts(fp, _("-l Run cupsd on demand."));
#endif /* HAVE_ONDEMAND */
_cupsLangPuts(fp, _("-s cups-files.conf Set cups-files.conf file to use."));
_cupsLangPuts(fp, _("-t Test the configuration file."));
exit(status);
}