Load cups into easysw/current.

[thirdparty/cups.git] / scheduler / job.c

/*
 * "$Id: job.c 4906 2006-01-10 20:53:28Z mike $"
 *
 *   Job management routines for the Common UNIX Printing System (CUPS).
 *
 *   Copyright 1997-2005 by Easy Software Products, all rights reserved.
 *
 *   These coded instructions, statements, and computer programs are the
 *   property of Easy Software Products and are protected by Federal
 *   copyright law.  Distribution and use rights are outlined in the file
 *   "LICENSE.txt" which should have been included with this file.  If this
 *   file is missing or damaged please contact Easy Software Products
 *   at:
 *
 *       Attn: CUPS Licensing Information
 *       Easy Software Products
 *       44141 Airport View Drive, Suite 204
 *       Hollywood, Maryland 20636 USA
 *
 *       Voice: (301) 373-9600
 *       EMail: cups-info@cups.org
 *         WWW: http://www.cups.org
 *
 * Contents:
 *
 *   cupsdAddJob()              - Add a new job to the job queue...
 *   cupsdCancelJob()           - Cancel the specified print job.
 *   cupsdCancelJobs()          - Cancel all jobs for the given destination/user...
 *   cupsdCheckJobs()           - Check the pending jobs and start any if the
 *                                destination is available.
 *   cupsdCleanJobs()           - Clean out old jobs.
 *   cupsdFreeAllJobs()         - Free all jobs from memory.
 *   cupsdFindJob()             - Find the specified job.
 *   cupsdGetPrinterJobCount()  - Get the number of pending, processing,
 *                                or held jobs in a printer or class.
 *   cupsdGetUserJobCount()     - Get the number of pending, processing,
 *                                or held jobs for a user.
 *   cupsdHoldJob()             - Hold the specified job.
 *   cupsdLoadAllJobs()         - Load all jobs from disk.
 *   cupsdMoveJob()             - Move the specified job to a different
 *                                destination.
 *   cupsdReleaseJob()          - Release the specified job.
 *   cupsdRestartJob()          - Restart the specified job.
 *   cupsdSaveJob()             - Save a job to disk.
 *   cupsdSetJobHoldUntil()     - Set the hold time for a job...
 *   cupsdSetJobPriority()      - Set the priority of a job, moving it up/down
 *                                in the list as needed.
 *   cupsdStartJob()            - Start a print job.
 *   cupsdStopAllJobs()         - Stop all print jobs.
 *   cupsdStopJob()             - Stop a print job.
 *   cupsdUpdateJob()           - Read a status update from a job's filters.
 *   compare_active_jobs()      - Compare the job IDs and priorities of two jobs.
 *   compare_jobs()             - Compare the job IDs of two jobs.
 *   ipp_length()               - Compute the size of the buffer needed to hold 
 *                                the textual IPP attributes.
 *   set_hold_until()           - Set the hold time and update job-hold-until attribute.
 */

/*
 * Include necessary headers...
 */

#include "cupsd.h"
#include <grp.h>
#include <cups/backend.h>
#include <cups/dir.h>


/*
 * Local globals...
 */

static mime_filter_t    gziptoany_filter =
                        {
                          NULL,         /* Source type */
                          NULL,         /* Destination type */
                          0,            /* Cost */
                          "gziptoany"   /* Filter program to run */
                        };


/*
 * Local functions...
 */

static int      compare_active_jobs(void *first, void *second, void *data);
static int      compare_jobs(void *first, void *second, void *data);
static int      ipp_length(ipp_t *ipp);
static void     set_time(cupsd_job_t *job, const char *name);
static void     set_hold_until(cupsd_job_t *job, time_t holdtime);


/*
 * 'cupsdAddJob()' - Add a new job to the job queue...
 */

cupsd_job_t *                           /* O - New job record */
cupsdAddJob(int        priority,        /* I - Job priority */
            const char *dest)           /* I - Job destination */
{
  cupsd_job_t   *job;                   /* New job record */


  job = calloc(sizeof(cupsd_job_t), 1);

  job->id             = NextJobId ++;
  job->priority       = priority;
  job->back_pipes[0]  = -1;
  job->back_pipes[1]  = -1;
  job->print_pipes[0] = -1;
  job->print_pipes[1] = -1;

  cupsdSetString(&job->dest, dest);

 /*
  * Add the new job to the "all jobs" and "active jobs" lists...
  */

  cupsArrayAdd(Jobs, job);
  cupsArrayAdd(ActiveJobs, job);

  return (job);
}


/*
 * 'cupsdCancelJob()' - Cancel the specified print job.
 */

void
cupsdCancelJob(cupsd_job_t *job,        /* I - Job to cancel */
               int         purge)       /* I - Purge jobs? */
{
  int           i;                      /* Looping var */
  char          filename[1024];         /* Job filename */


  cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdCancelJob: id = %d", job->id);

 /*
  * Remove the job from the active list...
  */

  cupsArrayRemove(ActiveJobs, job);

 /*
  * Stop any processes that are working on the current job...
  */

  if (job->state->values[0].integer == IPP_JOB_PROCESSING)
    cupsdStopJob(job, 0);

  cupsArrayRemove(ActiveJobs, job);

  job->state->values[0].integer = IPP_JOB_CANCELLED;

  set_time(job, "time-at-completed");

  cupsdExpireSubscriptions(NULL, job);

 /*
  * Remove any authentication data...
  */

  snprintf(filename, sizeof(filename), "%s/a%05d", RequestRoot,
           job->id);
  unlink(filename);

 /*
  * Remove the print file for good if we aren't preserving jobs or
  * files...
  */

  job->current_file = 0;

  if (!JobHistory || !JobFiles || purge ||
      (job->dtype & CUPS_PRINTER_REMOTE))
    for (i = 1; i <= job->num_files; i ++)
    {
      snprintf(filename, sizeof(filename), "%s/d%05d-%03d", RequestRoot,
               job->id, i);
      unlink(filename);
    }

  if (JobHistory && !purge && !(job->dtype & CUPS_PRINTER_REMOTE))
  {
   /*
    * Save job state info...
    */

    cupsdSaveJob(job);
  }
  else
  {
   /*
    * Remove the job info file...
    */

    snprintf(filename, sizeof(filename), "%s/c%05d", RequestRoot,
             job->id);
    unlink(filename);

   /*
    * Remove the job from the "all jobs" list...
    */

    cupsArrayRemove(Jobs, job);

   /*
    * Free all memory used...
    */

    if (job->attrs != NULL)
      ippDelete(job->attrs);

    if (job->num_files > 0)
    {
      free(job->compressions);
      free(job->filetypes);
    }

    cupsdClearString(&job->username);
    cupsdClearString(&job->dest);

    free(job);
  }
}


/*
 * 'cupsdCancelJobs()' - Cancel all jobs for the given destination/user...
 */

void
cupsdCancelJobs(const char *dest,       /* I - Destination to cancel */
                const char *username,   /* I - Username or NULL */
                int        purge)       /* I - Purge jobs? */
{
  cupsd_job_t   *job;                   /* Current job */


  for (job = (cupsd_job_t *)cupsArrayFirst(Jobs);
       job;
       job = (cupsd_job_t *)cupsArrayNext(Jobs))
    if ((dest == NULL || !strcmp(job->dest, dest)) &&
        (username == NULL || !strcmp(job->username, username)))
    {
     /*
      * Cancel all jobs matching this destination/user...
      */

      cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                    purge ? "Job purged." : "Job canceled.");

      cupsdCancelJob(job, purge);
    }

  cupsdCheckJobs();
}


/*
 * 'cupsdCheckJobs()' - Check the pending jobs and start any if the destination
 *                      is available.
 */

void
cupsdCheckJobs(void)
{
  cupsd_job_t           *job;           /* Current job in queue */
  cupsd_printer_t       *printer,       /* Printer destination */
                        *pclass;        /* Printer class destination */


  DEBUG_puts("cupsdCheckJobs()");

  for (job = (cupsd_job_t *)cupsArrayFirst(ActiveJobs);
       job;
       job = (cupsd_job_t *)cupsArrayNext(ActiveJobs))
  {
   /*
    * Start held jobs if they are ready...
    */

    if (job->state->values[0].integer == IPP_JOB_HELD &&
        job->hold_until &&
        job->hold_until < time(NULL))
      job->state->values[0].integer = IPP_JOB_PENDING;

   /*
    * Start pending jobs if the destination is available...
    */

    if (job->state->values[0].integer == IPP_JOB_PENDING && !NeedReload)
    {
      printer = cupsdFindDest(job->dest);
      pclass  = NULL;

      while (printer &&
             (printer->type & (CUPS_PRINTER_IMPLICIT | CUPS_PRINTER_CLASS)))
      {
       /*
        * If the class is remote, just pass it to the remote server...
        */

        pclass = printer;

        if (!(pclass->type & CUPS_PRINTER_REMOTE))
        {
          if (pclass->state != IPP_PRINTER_STOPPED)
            printer = cupsdFindAvailablePrinter(job->dest);
          else
            printer = NULL;
        }
      }

      if (!printer && !pclass)
      {
       /*
        * Whoa, the printer and/or class for this destination went away;
        * cancel the job...
        */

        cupsdLogMessage(CUPSD_LOG_WARN,
                        "Printer/class %s has gone away; cancelling job %d!",
                        job->dest, job->id);

        cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                      "Job canceled because the destination printer/class has gone away.");

        cupsdCancelJob(job, 1);
      }
      else if (printer)
      {
       /*
        * See if the printer is available or remote and not printing a job;
        * if so, start the job...
        */

        if (pclass)
        {
         /*
          * Add/update a job-actual-printer-uri attribute for this job
          * so that we know which printer actually printed the job...
          */

          ipp_attribute_t       *attr;  /* job-actual-printer-uri attribute */


          if ((attr = ippFindAttribute(job->attrs, "job-actual-printer-uri",
                                       IPP_TAG_URI)) != NULL)
            cupsdSetString(&attr->values[0].string.text, printer->uri);
          else
            ippAddString(job->attrs, IPP_TAG_JOB, IPP_TAG_URI,
                         "job-actual-printer-uri", NULL, printer->uri);
        }

        if (printer->state == IPP_PRINTER_IDLE ||       /* Printer is idle */
            ((printer->type & CUPS_PRINTER_REMOTE) &&   /* Printer is remote */
             !printer->job))                            /* and not printing a job */
          cupsdStartJob(job, printer);
      }
    }
  }
}


/*
 * 'cupsdCleanJobs()' - Clean out old jobs.
 */

void
cupsdCleanJobs(void)
{
  cupsd_job_t   *job;                   /* Current job */


  if (!MaxJobs)
    return;

  for (job = (cupsd_job_t *)cupsArrayFirst(Jobs);
       job && cupsArrayCount(Jobs) >= MaxJobs;
       job = (cupsd_job_t *)cupsArrayNext(Jobs))
    if (job->state->values[0].integer >= IPP_JOB_CANCELLED)
      cupsdCancelJob(job, 1);
}


/*
 * 'cupsdFinishJob()' - Finish a job.
 */

void
cupsdFinishJob(cupsd_job_t *job)        /* I - Job */
{
  int                   job_history;    /* Did cupsdCancelJob() keep the job? */
  cupsd_printer_t       *printer;       /* Current printer */


  cupsdLogMessage(CUPSD_LOG_DEBUG,
                  "cupsdFinishJob: job %d, file %d is complete.",
                  job->id, job->current_file - 1);

  cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFinishJob: job->status is %d",
                  job->status);

  if (job->status_buffer && job->current_file >= job->num_files)
  {
   /*
    * Close the pipe and clear the input bit.
    */

    cupsdLogMessage(CUPSD_LOG_DEBUG2,
                    "cupsdFinishJob: Removing fd %d from InputSet...",
                    job->status_buffer->fd);

    FD_CLR(job->status_buffer->fd, InputSet);

    cupsdLogMessage(CUPSD_LOG_DEBUG2,
                    "cupsdFinishJob: Closing status input pipe %d...",
                    job->status_buffer->fd);

    cupsdStatBufDelete(job->status_buffer);

    job->status_buffer = NULL;
  }

  if (job->status < 0)
  {
   /*
    * Backend had errors; stop it...
    */

    printer = job->printer;

    switch (-job->status)
    {
      default :
      case CUPS_BACKEND_FAILED :
         /*
          * Backend failure, use the error-policy to determine how to
          * act...
          */

          cupsdStopJob(job, 0);
          job->state->values[0].integer = IPP_JOB_PENDING;
          cupsdSaveJob(job);

         /*
          * If the job was queued to a class, try requeuing it...  For
          * faxes and retry-job queues, hold the current job for 5 minutes.
          */

          if (job->dtype & (CUPS_PRINTER_CLASS | CUPS_PRINTER_IMPLICIT))
            cupsdCheckJobs();
          else if ((printer->type & CUPS_PRINTER_FAX) ||
                   !strcmp(printer->error_policy, "retry-job"))
          {
           /*
            * See how many times we've tried to send the job; if more than
            * the limit, cancel the job.
            */

            job->tries ++;

            if (job->tries >= JobRetryLimit)
            {
             /*
              * Too many tries...
              */

              cupsdLogMessage(CUPSD_LOG_ERROR,
                              "Canceling job %d since it could not be sent after %d tries.",
                              job->id, JobRetryLimit);

              cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                            "Job canceled since it could not be sent after %d tries.",
                            JobRetryLimit);

              cupsdCancelJob(job, 0);
            }
            else
            {
             /*
              * Try again in N seconds...
              */

              set_hold_until(job, time(NULL) + JobRetryInterval);
            }
          }
          else if (!strcmp(printer->error_policy, "abort-job"))
            cupsdCancelJob(job, 0);
          break;

      case CUPS_BACKEND_CANCEL :
         /*
          * Cancel the job...
          */

          cupsdCancelJob(job, 0);
          break;

      case CUPS_BACKEND_HOLD :
         /*
          * Hold the job...
          */

          cupsdStopJob(job, 0);
          cupsdSetJobHoldUntil(job, "indefinite");
          cupsdSaveJob(job);
          break;

      case CUPS_BACKEND_STOP :
         /*
          * Stop the printer...
          */

          cupsdStopJob(job, 0);
          cupsdSaveJob(job);
          cupsdSetPrinterState(printer, IPP_PRINTER_STOPPED, 1);
          break;

      case CUPS_BACKEND_AUTH_REQUIRED :
          cupsdStopJob(job, 0);
          cupsdSetJobHoldUntil(job, "authenticated");
          cupsdSaveJob(job);

          cupsdAddEvent(CUPSD_EVENT_JOB_STOPPED, printer, job,
                        "Authentication is required for job %d.", job->id);
          break;
    }

   /*
    * Try printing another job...
    */

    cupsdCheckJobs();
  }
  else if (job->status > 0)
  {
   /*
    * Filter had errors; cancel it...
    */

    if (job->current_file < job->num_files)
      cupsdStartJob(job, job->printer);
    else
    {
      cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                    "Job aborted due to filter errors; please consult the "
                    "error_log file for details.");

      job_history = JobHistory && !(job->dtype & CUPS_PRINTER_REMOTE);

      cupsdCancelJob(job, 0);

      if (job_history)
      {
        job->state->values[0].integer = IPP_JOB_ABORTED;
        cupsdSaveJob(job);
      }

      cupsdCheckJobs();
    }
  }
  else
  {
   /*
    * Job printed successfully; cancel it...
    */

    if (job->current_file < job->num_files)
    {
      FilterLevel -= job->cost;
      cupsdStartJob(job, job->printer);
    }
    else
    {
      cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                    "Job completed successfully.");

      job_history = JobHistory && !(job->dtype & CUPS_PRINTER_REMOTE);

      cupsdCancelJob(job, 0);

      if (job_history)
      {
        job->state->values[0].integer = IPP_JOB_COMPLETED;
        cupsdSaveJob(job);
      }

      cupsdCheckJobs();
    }
  }
}


/*
 * 'cupsdFreeAllJobs()' - Free all jobs from memory.
 */

void
cupsdFreeAllJobs(void)
{
  cupsd_job_t   *job;                   /* Current job */


  cupsdHoldSignals();

  cupsdStopAllJobs();

  for (job = (cupsd_job_t *)cupsArrayFirst(Jobs);
       job;
       job = (cupsd_job_t *)cupsArrayNext(Jobs))
  {
    cupsArrayRemove(Jobs, job);
    cupsArrayRemove(ActiveJobs, job);

    ippDelete(job->attrs);

    if (job->num_files > 0)
    {
      free(job->compressions);
      free(job->filetypes);
    }

    free(job);
  }

  cupsdReleaseSignals();
}


/*
 * 'cupsdFindJob()' - Find the specified job.
 */

cupsd_job_t *                           /* O - Job data */
cupsdFindJob(int id)                    /* I - Job ID */
{
  cupsd_job_t   key;                    /* Search key */


  key.id = id;

  return ((cupsd_job_t *)cupsArrayFind(Jobs, &key));
}


/*
 * 'cupsdGetPrinterJobCount()' - Get the number of pending, processing,
 *                               or held jobs in a printer or class.
 */

int                                     /* O - Job count */
cupsdGetPrinterJobCount(
    const char *dest)                   /* I - Printer or class name */
{
  int           count;                  /* Job count */
  cupsd_job_t   *job;                   /* Current job */


  for (job = (cupsd_job_t *)cupsArrayFirst(ActiveJobs), count = 0;
       job;
       job = (cupsd_job_t *)cupsArrayNext(ActiveJobs))
    if (!strcasecmp(job->dest, dest))
      count ++;

  return (count);
}


/*
 * 'cupsdGetUserJobCount()' - Get the number of pending, processing,
 *                            or held jobs for a user.
 */

int                                     /* O - Job count */
cupsdGetUserJobCount(
    const char *username)               /* I - Username */
{
  int           count;                  /* Job count */
  cupsd_job_t   *job;                   /* Current job */


  for (job = (cupsd_job_t *)cupsArrayFirst(ActiveJobs), count = 0;
       job;
       job = (cupsd_job_t *)cupsArrayNext(ActiveJobs))
    if (!strcasecmp(job->username, username))
      count ++;

  return (count);
}


/*
 * 'cupsdHoldJob()' - Hold the specified job.
 */

void
cupsdHoldJob(cupsd_job_t *job)          /* I - Job data */
{
  cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdHoldJob: id = %d", job->id);

  if (job->state->values[0].integer == IPP_JOB_PROCESSING)
    cupsdStopJob(job, 0);

  DEBUG_puts("cupsdHoldJob: setting state to held...");

  job->state->values[0].integer = IPP_JOB_HELD;

  cupsdSaveJob(job);

  cupsdCheckJobs();
}


/*
 * 'cupsdLoadAllJobs()' - Load all jobs from disk.
 */

void
cupsdLoadAllJobs(void)
{
  cups_dir_t            *dir;           /* Directory */
  cups_dentry_t         *dent;          /* Directory entry */
  char                  filename[1024]; /* Full filename of job file */
  int                   fd;             /* File descriptor */
  cupsd_job_t           *job;           /* New job */
  int                   jobid,          /* Current job ID */
                        fileid;         /* Current file ID */
  ipp_attribute_t       *attr;          /* Job attribute */
  char                  method[HTTP_MAX_URI],
                                        /* Method portion of URI */
                        username[HTTP_MAX_URI],
                                        /* Username portion of URI */
                        host[HTTP_MAX_URI],
                                        /* Host portion of URI */
                        resource[HTTP_MAX_URI];
                                        /* Resource portion of URI */
  int                   port;           /* Port portion of URI */
  const char            *dest;          /* Destination */
  mime_type_t           **filetypes;    /* New filetypes array */
  int                   *compressions;  /* New compressions array */


 /*
  * First create the job lists...
  */

  if (!Jobs)
    Jobs = cupsArrayNew(compare_jobs, NULL);

  if (!ActiveJobs)
    ActiveJobs = cupsArrayNew(compare_active_jobs, NULL);

 /*
  * Then open the requests directory...
  */

  cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdLoadAllJobs: Scanning %s...",
                  RequestRoot);

  if ((dir = cupsDirOpen(RequestRoot)) == NULL)
  {
    cupsdLogMessage(CUPSD_LOG_ERROR,
                    "cupsdLoadAllJobs: Unable to open spool directory %s: %s",
                    RequestRoot, strerror(errno));
    return;
  }

 /*
  * Read all the c##### files...
  */

  while ((dent = cupsDirRead(dir)) != NULL)
    if (strlen(dent->filename) >= 6 && dent->filename[0] == 'c')
    {
     /*
      * Allocate memory for the job...
      */

      if ((job = calloc(sizeof(cupsd_job_t), 1)) == NULL)
      {
        cupsdLogMessage(CUPSD_LOG_ERROR,
                        "cupsdLoadAllJobs: Ran out of memory for jobs!");
        cupsDirClose(dir);
        return;
      }

      if ((job->attrs = ippNew()) == NULL)
      {
        free(job);
        cupsdLogMessage(CUPSD_LOG_ERROR,
                        "cupsdLoadAllJobs: Ran out of memory for job attributes!");
        cupsDirClose(dir);
        return;
      }

     /*
      * Assign the job ID...
      */

      job->id             = atoi(dent->filename + 1);
      job->back_pipes[0]  = -1;
      job->back_pipes[1]  = -1;
      job->print_pipes[0] = -1;
      job->print_pipes[1] = -1;

      cupsdLogMessage(CUPSD_LOG_DEBUG,
                      "cupsdLoadAllJobs: Loading attributes for job %d...",
                      job->id);

      if (job->id >= NextJobId)
        NextJobId = job->id + 1;

     /*
      * Load the job control file...
      */

      snprintf(filename, sizeof(filename), "%s/%s", RequestRoot, dent->filename);
      if ((fd = open(filename, O_RDONLY)) < 0)
      {
        cupsdLogMessage(CUPSD_LOG_ERROR,
                        "cupsdLoadAllJobs: Unable to open job control file \"%s\" - %s!",
                        filename, strerror(errno));
        ippDelete(job->attrs);
        free(job);
        unlink(filename);
        continue;
      }
      else
      {
        if (ippReadFile(fd, job->attrs) != IPP_DATA)
        {
          cupsdLogMessage(CUPSD_LOG_ERROR,
                          "cupsdLoadAllJobs: Unable to read job control file \"%s\"!",
                          filename);
          close(fd);
          ippDelete(job->attrs);
          free(job);
          unlink(filename);
          continue;
        }

        close(fd);
      }

      if ((job->state = ippFindAttribute(job->attrs, "job-state", IPP_TAG_ENUM)) == NULL)
      {
        cupsdLogMessage(CUPSD_LOG_ERROR,
                        "cupsdLoadAllJobs: Missing or bad job-state attribute in control file \"%s\"!",
                        filename);
        ippDelete(job->attrs);
        free(job);
        unlink(filename);
        continue;
      }

      if ((attr = ippFindAttribute(job->attrs, "job-printer-uri", IPP_TAG_URI)) == NULL)
      {
        cupsdLogMessage(CUPSD_LOG_ERROR,
                        "cupsdLoadAllJobs: No job-printer-uri attribute in control file \"%s\"!",
                        filename);
        ippDelete(job->attrs);
        free(job);
        unlink(filename);
        continue;
      }

      httpSeparateURI(attr->values[0].string.text, method, sizeof(method),
                      username, sizeof(username), host, sizeof(host), &port,
                      resource, sizeof(resource));

      if ((dest = cupsdValidateDest(host, resource, &(job->dtype),
                                    NULL)) == NULL)
      {
        cupsdLogMessage(CUPSD_LOG_ERROR,
                        "cupsdLoadAllJobs: Unable to queue job for destination \"%s\"!",
                        attr->values[0].string.text);
        ippDelete(job->attrs);
        free(job);
        unlink(filename);
        continue;
      }

      cupsdSetString(&job->dest, dest);

      job->sheets     = ippFindAttribute(job->attrs, "job-media-sheets-completed",
                                         IPP_TAG_INTEGER);
      job->job_sheets = ippFindAttribute(job->attrs, "job-sheets", IPP_TAG_NAME);

      if ((attr = ippFindAttribute(job->attrs, "job-priority", IPP_TAG_INTEGER)) == NULL)
      {
        cupsdLogMessage(CUPSD_LOG_ERROR,
                        "cupsdLoadAllJobs: Missing or bad job-priority attribute in control file \"%s\"!",
                        filename);
        ippDelete(job->attrs);
        free(job);
        unlink(filename);
        continue;
      }
      job->priority = attr->values[0].integer;

      if ((attr = ippFindAttribute(job->attrs, "job-originating-user-name", IPP_TAG_NAME)) == NULL)
      {
        cupsdLogMessage(CUPSD_LOG_ERROR,
                        "cupsdLoadAllJobs: Missing or bad job-originating-user-name attribute in control file \"%s\"!",
                        filename);
        ippDelete(job->attrs);
        free(job);
        unlink(filename);
        continue;
      }
      cupsdSetString(&job->username, attr->values[0].string.text);

     /*
      * Insert the job into the array, sorting by job priority and ID...
      */

      cupsArrayAdd(Jobs, job);
      if (job->state->values[0].integer < IPP_JOB_STOPPED)
        cupsArrayAdd(ActiveJobs,job);

     /*
      * Set the job hold-until time and state...
      */

      if (job->state->values[0].integer == IPP_JOB_HELD)
      {
        if ((attr = ippFindAttribute(job->attrs, "job-hold-until", IPP_TAG_KEYWORD)) == NULL)
          attr = ippFindAttribute(job->attrs, "job-hold-until", IPP_TAG_NAME);

        if (attr == NULL)
          job->state->values[0].integer = IPP_JOB_PENDING;
        else
          cupsdSetJobHoldUntil(job, attr->values[0].string.text);
      }
      else if (job->state->values[0].integer == IPP_JOB_PROCESSING)
        job->state->values[0].integer = IPP_JOB_PENDING;
    }

 /*
  * Read all the d##### files...
  */

  cupsDirRewind(dir);

  while ((dent = cupsDirRead(dir)) != NULL)
    if (strlen(dent->filename) > 7 && dent->filename[0] == 'd' &&
        strchr(dent->filename, '-'))
    {
     /*
      * Find the job...
      */

      jobid  = atoi(dent->filename + 1);
      fileid = atoi(strchr(dent->filename, '-') + 1);

      cupsdLogMessage(CUPSD_LOG_DEBUG,
                      "cupsdLoadAllJobs: Auto-typing document file %s...",
                      dent->filename);

      snprintf(filename, sizeof(filename), "%s/%s", RequestRoot, dent->filename);

      if ((job = cupsdFindJob(jobid)) == NULL)
      {
        cupsdLogMessage(CUPSD_LOG_ERROR,
                        "cupsdLoadAllJobs: Orphaned print file \"%s\"!",
                        filename);
        unlink(filename);
        continue;
      }

      if (fileid > job->num_files)
      {
        if (job->num_files == 0)
        {
          compressions = (int *)calloc(fileid, sizeof(int));
          filetypes    = (mime_type_t **)calloc(fileid, sizeof(mime_type_t *));
        }
        else
        {
          compressions = (int *)realloc(job->compressions,
                                        sizeof(int) * fileid);
          filetypes    = (mime_type_t **)realloc(job->filetypes,
                                                 sizeof(mime_type_t *) * fileid);
        }

        if (compressions == NULL || filetypes == NULL)
        {
          cupsdLogMessage(CUPSD_LOG_ERROR, "cupsdLoadAllJobs: Ran out of memory for job file types!");
          continue;
        }

        job->compressions = compressions;
        job->filetypes    = filetypes;
        job->num_files    = fileid;
      }

      job->filetypes[fileid - 1] = mimeFileType(MimeDatabase, filename,
                                                job->compressions + fileid - 1);

      if (job->filetypes[fileid - 1] == NULL)
        job->filetypes[fileid - 1] = mimeType(MimeDatabase, "application",
                                              "vnd.cups-raw");
    }

  cupsDirClose(dir);

 /*
  * Clean out old jobs as needed...
  */

  cupsdCleanJobs();
}


/*
 * 'cupsdMoveJob()' - Move the specified job to a different destination.
 */

void
cupsdMoveJob(cupsd_job_t *job,          /* I - Job */
             const char  *dest)         /* I - Destination */
{
  ipp_attribute_t       *attr;          /* job-printer-uri attribute */
  cupsd_printer_t       *p;             /* Destination printer or class */


 /*
  * Find the printer...
  */

  if ((p = cupsdFindDest(dest)) == NULL)
    return;

 /*
  * Don't move completed jobs...
  */

  if (job->state->values[0].integer >= IPP_JOB_PROCESSING)
    return;

 /*
  * Change the destination information...
  */

  cupsdSetString(&job->dest, dest);
  job->dtype = p->type & (CUPS_PRINTER_CLASS | CUPS_PRINTER_REMOTE |
                          CUPS_PRINTER_IMPLICIT);

  if ((attr = ippFindAttribute(job->attrs, "job-printer-uri", IPP_TAG_URI)) != NULL)
    cupsdSetString(&(attr->values[0].string.text), p->uri);

  cupsdSaveJob(job);
}


/*
 * 'cupsdReleaseJob()' - Release the specified job.
 */

void
cupsdReleaseJob(cupsd_job_t *job)       /* I - Job */
{
  cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdReleaseJob: id = %d", job->id);

  if (job->state->values[0].integer == IPP_JOB_HELD)
  {
    DEBUG_puts("cupsdReleaseJob: setting state to pending...");

    job->state->values[0].integer = IPP_JOB_PENDING;
    cupsdSaveJob(job);
    cupsdCheckJobs();
  }
}


/*
 * 'cupsdRestartJob()' - Restart the specified job.
 */

void
cupsdRestartJob(cupsd_job_t *job)       /* I - Job */
{
  cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdRestartJob: id = %d", job->id);

  if (job->state->values[0].integer == IPP_JOB_STOPPED || JobFiles)
  {
    job->tries = 0;
    job->state->values[0].integer = IPP_JOB_PENDING;
    cupsdSaveJob(job);
    cupsdCheckJobs();
  }
}


/*
 * 'cupsdSaveJob()' - Save a job to disk.
 */

void
cupsdSaveJob(cupsd_job_t *job)          /* I - Job */
{
  char          filename[1024];         /* Job control filename */
  int           fd;                     /* File descriptor */


  snprintf(filename, sizeof(filename), "%s/c%05d", RequestRoot, job->id);

  if ((fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0)
  {
    cupsdLogMessage(CUPSD_LOG_ERROR,
                    "cupsdSaveJob: Unable to create job control file \"%s\" - %s.",
                    filename, strerror(errno));
    return;
  }

  fchmod(fd, 0600);
  fchown(fd, RunUser, Group);

  ippWriteFile(fd, job->attrs);

  cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdSaveJob: Closing file %d...", fd);

  close(fd);
}


/*
 * 'cupsdSetJobHoldUntil()' - Set the hold time for a job...
 */

void
cupsdSetJobHoldUntil(cupsd_job_t *job,  /* I - Job */
                     const char  *when) /* I - When to resume */
{
  time_t        curtime;                /* Current time */
  struct tm     *curdate;               /* Current date */
  int           hour;                   /* Hold hour */
  int           minute;                 /* Hold minute */
  int           second;                 /* Hold second */


  cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdSetJobHoldUntil(%d, \"%s\")",
                  job->id, when);

  second = 0;

  if (!strcmp(when, "indefinite") || !strcmp(when, "authenticated"))
  {
   /*
    * Hold indefinitely...
    */

    job->hold_until = 0;
  }
  else if (!strcmp(when, "day-time"))
  {
   /*
    * Hold to 6am the next morning unless local time is < 6pm.
    */

    curtime = time(NULL);
    curdate = localtime(&curtime);

    if (curdate->tm_hour < 18)
      job->hold_until = curtime;
    else
      job->hold_until = curtime +
                        ((29 - curdate->tm_hour) * 60 + 59 -
                         curdate->tm_min) * 60 + 60 - curdate->tm_sec;
  }
  else if (!strcmp(when, "evening") || strcmp(when, "night"))
  {
   /*
    * Hold to 6pm unless local time is > 6pm or < 6am.
    */

    curtime = time(NULL);
    curdate = localtime(&curtime);

    if (curdate->tm_hour < 6 || curdate->tm_hour >= 18)
      job->hold_until = curtime;
    else
      job->hold_until = curtime +
                        ((17 - curdate->tm_hour) * 60 + 59 -
                         curdate->tm_min) * 60 + 60 - curdate->tm_sec;
  }  
  else if (!strcmp(when, "second-shift"))
  {
   /*
    * Hold to 4pm unless local time is > 4pm.
    */

    curtime = time(NULL);
    curdate = localtime(&curtime);

    if (curdate->tm_hour >= 16)
      job->hold_until = curtime;
    else
      job->hold_until = curtime +
                        ((15 - curdate->tm_hour) * 60 + 59 -
                         curdate->tm_min) * 60 + 60 - curdate->tm_sec;
  }  
  else if (!strcmp(when, "third-shift"))
  {
   /*
    * Hold to 12am unless local time is < 8am.
    */

    curtime = time(NULL);
    curdate = localtime(&curtime);

    if (curdate->tm_hour < 8)
      job->hold_until = curtime;
    else
      job->hold_until = curtime +
                        ((23 - curdate->tm_hour) * 60 + 59 -
                         curdate->tm_min) * 60 + 60 - curdate->tm_sec;
  }  
  else if (!strcmp(when, "weekend"))
  {
   /*
    * Hold to weekend unless we are in the weekend.
    */

    curtime = time(NULL);
    curdate = localtime(&curtime);

    if (curdate->tm_wday || curdate->tm_wday == 6)
      job->hold_until = curtime;
    else
      job->hold_until = curtime +
                        (((5 - curdate->tm_wday) * 24 +
                          (17 - curdate->tm_hour)) * 60 + 59 -
                           curdate->tm_min) * 60 + 60 - curdate->tm_sec;
  }
  else if (sscanf(when, "%d:%d:%d", &hour, &minute, &second) >= 2)
  {
   /*
    * Hold to specified GMT time (HH:MM or HH:MM:SS)...
    */

    curtime = time(NULL);
    curdate = gmtime(&curtime);

    job->hold_until = curtime +
                      ((hour - curdate->tm_hour) * 60 + minute -
                       curdate->tm_min) * 60 + second - curdate->tm_sec;

   /*
    * Hold until next day as needed...
    */

    if (job->hold_until < curtime)
      job->hold_until += 24 * 60 * 60 * 60;
  }

  cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdSetJobHoldUntil: hold_until = %d",
                  (int)job->hold_until);
}


/*
 * 'cupsdSetJobPriority()' - Set the priority of a job, moving it up/down in
 *                           the list as needed.
 */

void
cupsdSetJobPriority(
    cupsd_job_t *job,                   /* I - Job ID */
    int         priority)               /* I - New priority (0 to 100) */
{
  ipp_attribute_t       *attr;          /* Job attribute */


 /*
  * Don't change completed jobs...
  */

  if (job->state->values[0].integer >= IPP_JOB_PROCESSING)
    return;

 /*
  * Set the new priority and re-add the job into the active list...
  */

  cupsArrayRemove(ActiveJobs, job);

  job->priority = priority;

  if ((attr = ippFindAttribute(job->attrs, "job-priority", IPP_TAG_INTEGER)) != NULL)
    attr->values[0].integer = priority;
  else
    ippAddInteger(job->attrs, IPP_TAG_JOB, IPP_TAG_INTEGER, "job-priority",
                  priority);

  cupsArrayAdd(ActiveJobs, job);

  cupsdSaveJob(job);
}


/*
 * 'cupsdStartJob()' - Start a print job.
 */

void
cupsdStartJob(cupsd_job_t     *job,     /* I - Job ID */
              cupsd_printer_t *printer) /* I - Printer to print job */
{
  int                   i;              /* Looping var */
  int                   slot;           /* Pipe slot */
  int                   num_filters;    /* Number of filters for job */
  mime_filter_t         *filters;       /* Filters for job */
  char                  method[255],    /* Method for output */
                        *optptr,        /* Pointer to options */
                        *valptr;        /* Pointer in value string */
  ipp_attribute_t       *attr;          /* Current attribute */
  int                   pid;            /* Process ID of new filter process */
  int                   banner_page;    /* 1 if banner page, 0 otherwise */
  int                   statusfds[2],   /* Pipes used between the filters and scheduler */
                        filterfds[2][2];/* Pipes used between the filters */
  int                   envc;           /* Number of environment variables */
  char                  *argv[8],       /* Filter command-line arguments */
                        sani_uri[1024], /* Sanitized DEVICE_URI env var */
                        filename[1024], /* Job filename */
                        command[1024],  /* Full path to filter/backend command */
                        jobid[255],     /* Job ID string */
                        title[IPP_MAX_NAME],
                                        /* Job title string */
                        copies[255],    /* # copies string */
                        *envp[100],     /* Environment variables */
                        charset[255],   /* CHARSET environment variable */
                        class_name[255],/* CLASS environment variable */
                        classification[1024],
                                        /* CLASSIFICATION environment variable */
                        content_type[1024],
                                        /* CONTENT_TYPE environment variable */
                        device_uri[1024],
                                        /* DEVICE_URI environment variable */
                        lang[255],      /* LANG environment variable */
                        ppd[1024],      /* PPD environment variable */
                        printer_name[255],
                                        /* PRINTER environment variable */
                        rip_max_cache[255];
                                        /* RIP_MAX_CACHE environment variable */
  static char           *options = NULL;/* Full list of options */
  static int            optlength = 0;  /* Length of option buffer */


  cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdStartJob() id = %d, file = %d/%d",
                  job->id, job->current_file, job->num_files);

  if (job->num_files == 0)
  {
    cupsdLogMessage(CUPSD_LOG_ERROR, "Job ID %d has no files!  Cancelling it!",
                    job->id);

    cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                  "Job canceled because it has no files.");

    cupsdCancelJob(job, 0);
    return;
  }

 /*
  * Figure out what filters are required to convert from
  * the source to the destination type...
  */

  num_filters   = 0;
  job->cost = 0;

  if (printer->raw)
  {
   /*
    * Remote jobs and raw queues go directly to the printer without
    * filtering...
    */

    cupsdLogMessage(CUPSD_LOG_DEBUG,
                    "cupsdStartJob: Sending job to queue tagged as raw...");

    filters = NULL;
  }
  else
  {
   /*
    * Local jobs get filtered...
    */

    filters = mimeFilter(MimeDatabase, job->filetypes[job->current_file],
                         printer->filetype, &num_filters, MAX_FILTERS - 1);

    if (num_filters == 0)
    {
      cupsdLogMessage(CUPSD_LOG_ERROR,
                      "Unable to convert file %d to printable format for job %d!",
                      job->current_file, job->id);
      cupsdLogMessage(CUPSD_LOG_INFO,
                      "Hint: Do you have ESP Ghostscript installed?");

      if (LogLevel < CUPSD_LOG_DEBUG)
        cupsdLogMessage(CUPSD_LOG_INFO,
                        "Hint: Try setting the LogLevel to \"debug\".");

      job->current_file ++;

      if (job->current_file == job->num_files)
      {
        cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                      "Job canceled because it has no files that can be printed.");

        cupsdCancelJob(job, 0);
      }

      return;
    }

   /*
    * Remove NULL ("-") filters...
    */

    for (i = 0; i < num_filters;)
      if (strcmp(filters[i].filter, "-") == 0)
      {
        num_filters --;
        if (i < num_filters)
          memcpy(filters + i, filters + i + 1,
                 (num_filters - i) * sizeof(mime_filter_t));
      }
      else
        i ++;

    if (num_filters == 0)
    {
      free(filters);
      filters = NULL;
    }
    else
    {
     /*
      * Compute filter cost...
      */

      for (i = 0; i < num_filters; i ++)
        job->cost += filters[i].cost;
    }
  }

 /*
  * See if the filter cost is too high...
  */

  if ((FilterLevel + job->cost) > FilterLimit && FilterLevel > 0 &&
      FilterLimit > 0)
  {
   /*
    * Don't print this job quite yet...
    */

    if (filters != NULL)
      free(filters);

    cupsdLogMessage(CUPSD_LOG_INFO,
                    "Holding job %d because filter limit has been reached.",
                    job->id);
    cupsdLogMessage(CUPSD_LOG_DEBUG,
                    "cupsdStartJob: id=%d, file=%d, cost=%d, level=%d, limit=%d",
                    job->id, job->current_file, job->cost, FilterLevel,
                    FilterLimit);
    return;
  }

  FilterLevel += job->cost;

 /*
  * Add decompression filters, if any...
  */

  if (job->compressions[job->current_file])
  {
   /*
    * Add gziptoany filter to the front of the list...
    */

    mime_filter_t       *temp_filters;

    if (num_filters == 0)
      temp_filters = malloc(sizeof(mime_filter_t));
    else
      temp_filters = realloc(filters,
                             sizeof(mime_filter_t) * (num_filters + 1));

    if (temp_filters == NULL)
    {
      cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to add decompression filter - %s",
                      strerror(errno));

      if (filters != NULL)
        free(filters);

      job->current_file ++;

      if (job->current_file == job->num_files)
      {
        cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                      "Job canceled because the print file could not be decompressed.");

        cupsdCancelJob(job, 0);
      }

      return;
    }

    filters = temp_filters;
    memmove(filters + 1, filters, num_filters * sizeof(mime_filter_t));
    *filters = gziptoany_filter;
    num_filters ++;
  }

 /*
  * Add port monitor, if any...
  */

  if (printer->port_monitor)
  {
   /*
    * Add port monitor to the end of the list...
    */

    mime_filter_t       *temp_filters;

    if (num_filters == 0)
      temp_filters = malloc(sizeof(mime_filter_t));
    else
      temp_filters = realloc(filters,
                             sizeof(mime_filter_t) * (num_filters + 1));

    if (temp_filters == NULL)
    {
      cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to add port monitor - %s",
                      strerror(errno));

      if (filters != NULL)
        free(filters);

      job->current_file ++;

      if (job->current_file == job->num_files)
      {
        cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                      "Job canceled because the port monitor could not be added.");

        cupsdCancelJob(job, 0);
      }

      return;
    }

    filters = temp_filters;
    memset(filters + num_filters, 0, sizeof(mime_filter_t));
    snprintf(filters[num_filters].filter, sizeof(filters[num_filters].filter),
             "%s/monitor/%s", ServerBin, printer->port_monitor);
    num_filters ++;
  }

 /*
  * Update the printer and job state to "processing"...
  */

  job->state->values[0].integer = IPP_JOB_PROCESSING;
  job->status  = 0;
  job->printer = printer;
  printer->job = job;
  cupsdSetPrinterState(printer, IPP_PRINTER_PROCESSING, 0);

  if (job->current_file == 0)
  {
    set_time(job, "time-at-processing");
    cupsdOpenPipe(job->back_pipes);
  }

 /*
  * Determine if we are printing a banner page or not...
  */

  if (job->job_sheets == NULL)
  {
    cupsdLogMessage(CUPSD_LOG_DEBUG, "No job-sheets attribute.");
    if ((job->job_sheets =
         ippFindAttribute(job->attrs, "job-sheets", IPP_TAG_ZERO)) != NULL)
      cupsdLogMessage(CUPSD_LOG_DEBUG,
                      "... but someone added one without setting job_sheets!");
  }
  else if (job->job_sheets->num_values == 1)
    cupsdLogMessage(CUPSD_LOG_DEBUG, "job-sheets=%s",
               job->job_sheets->values[0].string.text);
  else
    cupsdLogMessage(CUPSD_LOG_DEBUG, "job-sheets=%s,%s",
               job->job_sheets->values[0].string.text,
               job->job_sheets->values[1].string.text);

  if (printer->type & (CUPS_PRINTER_REMOTE | CUPS_PRINTER_IMPLICIT))
    banner_page = 0;
  else if (job->job_sheets == NULL)
    banner_page = 0;
  else if (strcasecmp(job->job_sheets->values[0].string.text, "none") != 0 &&
           job->current_file == 0)
    banner_page = 1;
  else if (job->job_sheets->num_values > 1 &&
           strcasecmp(job->job_sheets->values[1].string.text, "none") != 0 &&
           job->current_file == (job->num_files - 1))
    banner_page = 1;
  else
    banner_page = 0;

  cupsdLogMessage(CUPSD_LOG_DEBUG, "banner_page = %d", banner_page);

 /*
  * Building the options string is harder than it needs to be, but
  * for the moment we need to pass strings for command-line args and
  * not IPP attribute pointers... :)
  *
  * First allocate/reallocate the option buffer as needed...
  */

  i = ipp_length(job->attrs);

  if (i > optlength)
  {
    if (optlength == 0)
      optptr = malloc(i);
    else
      optptr = realloc(options, i);

    if (optptr == NULL)
    {
      cupsdLogMessage(CUPSD_LOG_CRIT,
                      "cupsdStartJob: Unable to allocate %d bytes for option buffer for job %d!",
                      i, job->id);

      if (filters != NULL)
        free(filters);

      FilterLevel -= job->cost;

      cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                    "Job canceled because the server ran out of memory.");

      cupsdCancelJob(job, 0);
      return;
    }

    options   = optptr;
    optlength = i;
  }

 /*
  * Now loop through the attributes and convert them to the textual
  * representation used by the filters...
  */

  optptr  = options;
  *optptr = '\0';

  snprintf(title, sizeof(title), "%s-%d", printer->name, job->id);
  strcpy(copies, "1");

  for (attr = job->attrs->attrs; attr != NULL; attr = attr->next)
  {
    if (strcmp(attr->name, "copies") == 0 &&
        attr->value_tag == IPP_TAG_INTEGER)
    {
     /*
      * Don't use the # copies attribute if we are printing the job sheets...
      */

      if (!banner_page)
        sprintf(copies, "%d", attr->values[0].integer);
    }
    else if (strcmp(attr->name, "job-name") == 0 &&
             (attr->value_tag == IPP_TAG_NAME ||
              attr->value_tag == IPP_TAG_NAMELANG))
      strlcpy(title, attr->values[0].string.text, sizeof(title));
    else if (attr->group_tag == IPP_TAG_JOB)
    {
     /*
      * Filter out other unwanted attributes...
      */

      if (attr->value_tag == IPP_TAG_MIMETYPE ||
          attr->value_tag == IPP_TAG_NAMELANG ||
          attr->value_tag == IPP_TAG_TEXTLANG ||
          attr->value_tag == IPP_TAG_URI ||
          attr->value_tag == IPP_TAG_URISCHEME ||
          attr->value_tag == IPP_TAG_BEGIN_COLLECTION) /* Not yet supported */
        continue;

      if (strncmp(attr->name, "time-", 5) == 0)
        continue;

      if (strncmp(attr->name, "job-", 4) == 0 &&
          !(printer->type & CUPS_PRINTER_REMOTE))
        continue;

      if (strncmp(attr->name, "job-", 4) == 0 &&
          strcmp(attr->name, "job-billing") != 0 &&
          strcmp(attr->name, "job-sheets") != 0 &&
          strcmp(attr->name, "job-hold-until") != 0 &&
          strcmp(attr->name, "job-priority") != 0)
        continue;

      if ((strcmp(attr->name, "page-label") == 0 ||
           strcmp(attr->name, "page-border") == 0 ||
           strncmp(attr->name, "number-up", 9) == 0 ||
           strcmp(attr->name, "page-set") == 0) &&
          banner_page)
        continue;

     /*
      * Otherwise add them to the list...
      */

      if (optptr > options)
        strlcat(optptr, " ", optlength - (optptr - options));

      if (attr->value_tag != IPP_TAG_BOOLEAN)
      {
        strlcat(optptr, attr->name, optlength - (optptr - options));
        strlcat(optptr, "=", optlength - (optptr - options));
      }

      for (i = 0; i < attr->num_values; i ++)
      {
        if (i)
          strlcat(optptr, ",", optlength - (optptr - options));

        optptr += strlen(optptr);

        switch (attr->value_tag)
        {
          case IPP_TAG_INTEGER :
          case IPP_TAG_ENUM :
              snprintf(optptr, optlength - (optptr - options),
                       "%d", attr->values[i].integer);
              break;

          case IPP_TAG_BOOLEAN :
              if (!attr->values[i].boolean)
                strlcat(optptr, "no", optlength - (optptr - options));

          case IPP_TAG_NOVALUE :
              strlcat(optptr, attr->name,
                      optlength - (optptr - options));
              break;

          case IPP_TAG_RANGE :
              if (attr->values[i].range.lower == attr->values[i].range.upper)
                snprintf(optptr, optlength - (optptr - options) - 1,
                         "%d", attr->values[i].range.lower);
              else
                snprintf(optptr, optlength - (optptr - options) - 1,
                         "%d-%d", attr->values[i].range.lower,
                         attr->values[i].range.upper);
              break;

          case IPP_TAG_RESOLUTION :
              snprintf(optptr, optlength - (optptr - options) - 1,
                       "%dx%d%s", attr->values[i].resolution.xres,
                       attr->values[i].resolution.yres,
                       attr->values[i].resolution.units == IPP_RES_PER_INCH ?
                           "dpi" : "dpc");
              break;

          case IPP_TAG_STRING :
          case IPP_TAG_TEXT :
          case IPP_TAG_NAME :
          case IPP_TAG_KEYWORD :
          case IPP_TAG_CHARSET :
          case IPP_TAG_LANGUAGE :
              for (valptr = attr->values[i].string.text; *valptr;)
              {
                if (strchr(" \t\n\\\'\"", *valptr))
                  *optptr++ = '\\';
                *optptr++ = *valptr++;
              }

              *optptr = '\0';
              break;

          default :
              break; /* anti-compiler-warning-code */
        }
      }

      optptr += strlen(optptr);
    }
  }

 /*
  * Build the command-line arguments for the filters.  Each filter
  * has 6 or 7 arguments:
  *
  *     argv[0] = printer
  *     argv[1] = job ID
  *     argv[2] = username
  *     argv[3] = title
  *     argv[4] = # copies
  *     argv[5] = options
  *     argv[6] = filename (optional; normally stdin)
  *
  * This allows legacy printer drivers that use the old System V
  * printing interface to be used by CUPS.
  */

  sprintf(jobid, "%d", job->id);
  snprintf(filename, sizeof(filename), "%s/d%05d-%03d", RequestRoot,
           job->id, job->current_file + 1);

  argv[0] = printer->name;
  argv[1] = jobid;
  argv[2] = job->username;
  argv[3] = title;
  argv[4] = copies;
  argv[5] = options;
  argv[6] = filename;
  argv[7] = NULL;

  cupsdLogMessage(CUPSD_LOG_DEBUG,
                  "cupsdStartJob: argv = \"%s\",\"%s\",\"%s\",\"%s\",\"%s\",\"%s\",\"%s\"",
                  argv[0], argv[1], argv[2], argv[3], argv[4], argv[5], argv[6]);

 /*
  * Create environment variable strings for the filters...
  */

  attr = ippFindAttribute(job->attrs, "attributes-natural-language",
                          IPP_TAG_LANGUAGE);

  switch (strlen(attr->values[0].string.text))
  {
    default :
       /*
        * This is an unknown or badly formatted language code; use
        * the POSIX locale...
        */

        strcpy(lang, "LANG=C");
        break;

    case 2 :
       /*
        * Just the language code (ll)...
        */

        snprintf(lang, sizeof(lang), "LANG=%s",
                 attr->values[0].string.text);
        break;

    case 5 :
       /*
        * Language and country code (ll-cc)...
        */

        snprintf(lang, sizeof(lang), "LANG=%c%c_%c%c",
                 attr->values[0].string.text[0],
                 attr->values[0].string.text[1],
                 toupper(attr->values[0].string.text[3] & 255),
                 toupper(attr->values[0].string.text[4] & 255));
        break;
  }

  attr = ippFindAttribute(job->attrs, "document-format",
                          IPP_TAG_MIMETYPE);
  if (attr != NULL &&
      (optptr = strstr(attr->values[0].string.text, "charset=")) != NULL)
    snprintf(charset, sizeof(charset), "CHARSET=%s", optptr + 8);
  else
  {
    attr = ippFindAttribute(job->attrs, "attributes-charset",
                            IPP_TAG_CHARSET);
    snprintf(charset, sizeof(charset), "CHARSET=%s",
             attr->values[0].string.text);
  }

  snprintf(content_type, sizeof(content_type), "CONTENT_TYPE=%s/%s",
           job->filetypes[job->current_file]->super,
           job->filetypes[job->current_file]->type);
  snprintf(device_uri, sizeof(device_uri), "DEVICE_URI=%s", printer->device_uri);
  cupsdSanitizeURI(printer->device_uri, sani_uri, sizeof(sani_uri));
  snprintf(ppd, sizeof(ppd), "PPD=%s/ppd/%s.ppd", ServerRoot, printer->name);
  snprintf(printer_name, sizeof(printer_name), "PRINTER=%s", printer->name);
  snprintf(rip_max_cache, sizeof(rip_max_cache), "RIP_MAX_CACHE=%s", RIPCache);

  envc = cupsdLoadEnv(envp, (int)(sizeof(envp) / sizeof(envp[0])));

  envp[envc ++] = charset;
  envp[envc ++] = lang;
  envp[envc ++] = ppd;
  envp[envc ++] = rip_max_cache;
  envp[envc ++] = content_type;
  envp[envc ++] = device_uri;
  envp[envc ++] = printer_name;

  if (Classification && !banner_page)
  {
    if ((attr = ippFindAttribute(job->attrs, "job-sheets",
                                 IPP_TAG_NAME)) == NULL)
      snprintf(classification, sizeof(classification), "CLASSIFICATION=%s",
               Classification);
    else if (attr->num_values > 1 &&
             strcmp(attr->values[1].string.text, "none") != 0)
      snprintf(classification, sizeof(classification), "CLASSIFICATION=%s",
               attr->values[1].string.text);
    else
      snprintf(classification, sizeof(classification), "CLASSIFICATION=%s",
               attr->values[0].string.text);

    envp[envc ++] = classification;
  }

  if (job->dtype & (CUPS_PRINTER_CLASS | CUPS_PRINTER_IMPLICIT))
  {
    snprintf(class_name, sizeof(class_name), "CLASS=%s", job->dest);
    envp[envc ++] = class_name;
  }

  envp[envc] = NULL;

  for (i = 0; i < envc; i ++)
    if (strncmp(envp[i], "DEVICE_URI=", 11))
      cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdStartJob: envp[%d]=\"%s\"",
                      i, envp[i]);
    else
      cupsdLogMessage(CUPSD_LOG_DEBUG,
                      "cupsdStartJob: envp[%d]=\"DEVICE_URI=%s\"", i, sani_uri);

  job->current_file ++;

 /*
  * Now create processes for all of the filters...
  */

  if (cupsdOpenPipe(statusfds))
  {
    cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to create job status pipes - %s.",
                    strerror(errno));
    snprintf(printer->state_message, sizeof(printer->state_message),
             "Unable to create status pipes - %s.", strerror(errno));

    cupsdAddPrinterHistory(printer);

    if (filters != NULL)
      free(filters);

    cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                  "Job canceled because the server could not create the job status pipes.");

    cupsdCancelJob(job, 0);
    return;
  }

  cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdStartJob: statusfds = [ %d %d ]",
                  statusfds[0], statusfds[1]);

#ifdef FD_CLOEXEC
  fcntl(statusfds[0], F_SETFD, FD_CLOEXEC);
  fcntl(statusfds[1], F_SETFD, FD_CLOEXEC);
#endif /* FD_CLOEXEC */

  job->status_buffer = cupsdStatBufNew(statusfds[0], "[Job %d]",
                                           job->id);
  job->status        = 0;
  memset(job->filters, 0, sizeof(job->filters));

  filterfds[1][0] = open("/dev/null", O_RDONLY);
  filterfds[1][1] = -1;

  if (filterfds[1][0] < 0)
  {
    cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to open \"/dev/null\" - %s.",
                    strerror(errno));
    snprintf(printer->state_message, sizeof(printer->state_message),
             "Unable to open \"/dev/null\" - %s.", strerror(errno));

    cupsdAddPrinterHistory(printer);

    if (filters != NULL)
      free(filters);

    cupsdClosePipe(statusfds);
    cupsdCancelJob(job, 0);
    return;
  }

  fcntl(filterfds[1][0], F_SETFD, fcntl(filterfds[1][0], F_GETFD) | FD_CLOEXEC);

  cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdStartJob: filterfds[%d] = [ %d %d ]",
                  1, filterfds[1][0], filterfds[1][1]);

  for (i = 0, slot = 0; i < num_filters; i ++)
  {
    if (filters[i].filter[0] != '/')
      snprintf(command, sizeof(command), "%s/filter/%s", ServerBin,
               filters[i].filter);
    else
      strlcpy(command, filters[i].filter, sizeof(command));

    if (i < (num_filters - 1))
    {
      if (cupsdOpenPipe(filterfds[slot]))
      {
        cupsdLogMessage(CUPSD_LOG_ERROR,
                        "Unable to create job filter pipes - %s.",
                        strerror(errno));
        snprintf(printer->state_message, sizeof(printer->state_message),
                "Unable to create filter pipes - %s.", strerror(errno));
        cupsdAddPrinterHistory(printer);

        if (filters != NULL)
          free(filters);

        cupsdClosePipe(statusfds);
        cupsdClosePipe(filterfds[!slot]);

        cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                      "Job canceled because the server could not create the filter pipes.");

        cupsdCancelJob(job, 0);
        return;
      }
    }
    else
    {
      if (job->current_file == 1)
      {
        if (strncmp(printer->device_uri, "file:", 5) != 0)
        {
          if (cupsdOpenPipe(job->print_pipes))
          {
            cupsdLogMessage(CUPSD_LOG_ERROR,
                            "Unable to create job backend pipes - %s.",
                            strerror(errno));
            snprintf(printer->state_message, sizeof(printer->state_message),
                    "Unable to create backend pipes - %s.", strerror(errno));
            cupsdAddPrinterHistory(printer);

            if (filters != NULL)
              free(filters);

            cupsdClosePipe(statusfds);
            cupsdClosePipe(filterfds[!slot]);

            cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                          "Job canceled because the server could not create the backend pipes.");

            cupsdCancelJob(job, 0);
            return;
          }
        }
        else
        {
          job->print_pipes[0] = -1;
          if (!strncmp(printer->device_uri, "file:/dev/", 10) &&
              strcmp(printer->device_uri, "file:/dev/null"))
            job->print_pipes[1] = open(printer->device_uri + 5,
                                       O_WRONLY | O_EXCL);
          else if (!strncmp(printer->device_uri, "file:///dev/", 12) &&
                   strcmp(printer->device_uri, "file:///dev/null"))
            job->print_pipes[1] = open(printer->device_uri + 7,
                                       O_WRONLY | O_EXCL);
          else
            job->print_pipes[1] = open(printer->device_uri + 5,
                                       O_WRONLY | O_CREAT | O_TRUNC, 0600);

          if (job->print_pipes[1] < 0)
          {
            cupsdLogMessage(CUPSD_LOG_ERROR,
                            "Unable to open output file \"%s\" - %s.",
                            printer->device_uri, strerror(errno));
            snprintf(printer->state_message, sizeof(printer->state_message),
                     "Unable to open output file \"%s\" - %s.",
                     printer->device_uri, strerror(errno));

            cupsdAddPrinterHistory(printer);

            if (filters != NULL)
              free(filters);

            cupsdClosePipe(statusfds);
            cupsdClosePipe(filterfds[!slot]);

            cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                          "Job canceled because the server could not open the output file.");

            cupsdCancelJob(job, 0);
            return;
          }

          fcntl(job->print_pipes[1], F_SETFD,
                fcntl(job->print_pipes[1], F_GETFD) | FD_CLOEXEC);
        }

        cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartJob: print_pipes = [ %d %d ]",
                   job->print_pipes[0], job->print_pipes[1]);
      }

      filterfds[slot][0] = job->print_pipes[0];
      filterfds[slot][1] = job->print_pipes[1];
    }

    cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdStartJob: filter = \"%s\"", command);
    cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdStartJob: filterfds[%d] = [ %d %d ]",
                    slot, filterfds[slot][0], filterfds[slot][1]);

    pid = cupsdStartProcess(command, argv, envp, filterfds[!slot][0],
                            filterfds[slot][1], statusfds[1],
                            job->back_pipes[0], 0, job->filters + i);

    cupsdLogMessage(CUPSD_LOG_DEBUG2,
                    "cupsdStartJob: Closing filter pipes for slot %d [ %d %d ]...",
                    !slot, filterfds[!slot][0], filterfds[!slot][1]);

    cupsdClosePipe(filterfds[!slot]);

    if (pid == 0)
    {
      cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to start filter \"%s\" - %s.",
                      filters[i].filter, strerror(errno));
      snprintf(printer->state_message, sizeof(printer->state_message),
               "Unable to start filter \"%s\" - %s.",
               filters[i].filter, strerror(errno));

      cupsdAddPrinterHistory(printer);

      if (filters != NULL)
        free(filters);

      cupsdAddPrinterHistory(printer);

      cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                    "Job canceled because the server could not execute a filter.");

      cupsdCancelJob(job, 0);
      return;
    }

    cupsdLogMessage(CUPSD_LOG_INFO, "Started filter %s (PID %d) for job %d.",
                    command, pid, job->id);

    argv[6] = NULL;
    slot    = !slot;
  }

  if (filters != NULL)
    free(filters);

 /*
  * Finally, pipe the final output into a backend process if needed...
  */

  if (strncmp(printer->device_uri, "file:", 5) != 0)
  {
    if (job->current_file == 1)
    {
      sscanf(printer->device_uri, "%254[^:]", method);
      snprintf(command, sizeof(command), "%s/backend/%s", ServerBin, method);

      argv[0] = sani_uri;

      filterfds[slot][0] = -1;
      filterfds[slot][1] = open("/dev/null", O_WRONLY);

      if (filterfds[slot][1] < 0)
      {
        cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to open \"/dev/null\" - %s.",
                        strerror(errno));
        snprintf(printer->state_message, sizeof(printer->state_message),
                 "Unable to open \"/dev/null\" - %s.", strerror(errno));

        cupsdAddPrinterHistory(printer);

        if (filters != NULL)
          free(filters);

        cupsdClosePipe(statusfds);

        cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                      "Job canceled because the server could not open a file.");

        cupsdCancelJob(job, 0);
        return;
      }

      fcntl(filterfds[slot][1], F_SETFD,
            fcntl(filterfds[slot][1], F_GETFD) | FD_CLOEXEC);

      cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdStartJob: backend = \"%s\"",
                      command);
      cupsdLogMessage(CUPSD_LOG_DEBUG,
                      "cupsdStartJob: filterfds[%d] = [ %d %d ]",
                      slot, filterfds[slot][0], filterfds[slot][1]);

      pid = cupsdStartProcess(command, argv, envp, filterfds[!slot][0],
                              filterfds[slot][1], statusfds[1],
                              job->back_pipes[1], 1,
                              &(job->backend));

      if (pid == 0)
      {
        cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to start backend \"%s\" - %s.",
                        method, strerror(errno));
        snprintf(printer->state_message, sizeof(printer->state_message),
                 "Unable to start backend \"%s\" - %s.", method, strerror(errno));

        cupsdLogMessage(CUPSD_LOG_DEBUG2,
                        "cupsdStartJob: Closing print pipes [ %d %d ]...",
                        job->print_pipes[0], job->print_pipes[1]);

        cupsdClosePipe(job->print_pipes);

        cupsdLogMessage(CUPSD_LOG_DEBUG2,
                        "cupsdStartJob: Closing back pipes [ %d %d ]...",
                        job->back_pipes[0], job->back_pipes[1]);

        cupsdClosePipe(job->back_pipes);

        cupsdAddEvent(CUPSD_EVENT_JOB_COMPLETED, job->printer, job,
                      "Job canceled because the server could not execute the backend.");

        cupsdCancelJob(job, 0);
        return;
      }
      else
      {
        cupsdLogMessage(CUPSD_LOG_INFO,
                        "Started backend %s (PID %d) for job %d.",
                        command, pid, job->id);
      }
    }

    if (job->current_file == job->num_files)
    {
      cupsdLogMessage(CUPSD_LOG_DEBUG2,
                      "cupsdStartJob: Closing print pipes [ %d %d ]...",
                      job->print_pipes[0], job->print_pipes[1]);

      cupsdClosePipe(job->print_pipes);

      cupsdLogMessage(CUPSD_LOG_DEBUG2,
                      "cupsdStartJob: Closing back pipes [ %d %d ]...",
                      job->back_pipes[0], job->back_pipes[1]);

      cupsdClosePipe(job->back_pipes);
    }
  }
  else
  {
    filterfds[slot][0] = -1;
    filterfds[slot][1] = -1;

    if (job->current_file == job->num_files)
    {
      cupsdLogMessage(CUPSD_LOG_DEBUG2,
                      "cupsdStartJob: Closing print pipes [ %d %d ]...",
                      job->print_pipes[0], job->print_pipes[1]);

      cupsdClosePipe(job->print_pipes);
    }
  }

  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "cupsdStartJob: Closing filter pipes for slot %d [ %d %d ]...",
                  slot, filterfds[slot][0], filterfds[slot][1]);

  cupsdClosePipe(filterfds[slot]);

  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "cupsdStartJob: Closing status output pipe %d...",
                  statusfds[1]);

  close(statusfds[1]);

  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "cupsdStartJob: Adding fd %d to InputSet...",
                  job->status_buffer->fd);

  FD_SET(job->status_buffer->fd, InputSet);
}


/*
 * 'cupsdStopAllJobs()' - Stop all print jobs.
 */

void
cupsdStopAllJobs(void)
{
  cupsd_job_t   *job;                   /* Current job */


  DEBUG_puts("cupsdStopAllJobs()");

  for (job = (cupsd_job_t *)cupsArrayFirst(ActiveJobs);
       job;
       job = (cupsd_job_t *)cupsArrayNext(ActiveJobs))
    if (job->state->values[0].integer == IPP_JOB_PROCESSING)
    {
      cupsdStopJob(job, 1);
      job->state->values[0].integer = IPP_JOB_PENDING;
    }
}


/*
 * 'cupsdStopJob()' - Stop a print job.
 */

void
cupsdStopJob(cupsd_job_t *job,          /* I - Job */
             int         force)         /* I - 1 = Force all filters to stop */
{
  int   i;                              /* Looping var */


  cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdStopJob: id = %d, force = %d",
                  job->id, force);

  if (job->state->values[0].integer != IPP_JOB_PROCESSING)
    return;

  FilterLevel -= job->cost;

  if (job->status < 0 &&
      !(job->dtype & (CUPS_PRINTER_CLASS | CUPS_PRINTER_IMPLICIT)) &&
      !(job->printer->type & CUPS_PRINTER_FAX) &&
      !strcmp(job->printer->error_policy, "stop-printer"))
    cupsdSetPrinterState(job->printer, IPP_PRINTER_STOPPED, 1);
  else if (job->printer->state != IPP_PRINTER_STOPPED)
    cupsdSetPrinterState(job->printer, IPP_PRINTER_IDLE, 0);

  cupsdLogMessage(CUPSD_LOG_DEBUG, "cupsdStopJob: printer state is %d",
                  job->printer->state);

  job->state->values[0].integer = IPP_JOB_STOPPED;
  job->printer->job = NULL;
  job->printer      = NULL;

  job->current_file --;

  for (i = 0; job->filters[i]; i ++)
    if (job->filters[i] > 0)
    {
      cupsdEndProcess(job->filters[i], force);
      job->filters[i] = 0;
    }

  if (job->backend > 0)
  {
    cupsdEndProcess(job->backend, force);
    job->backend = 0;
  }

  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "cupsdStopJob: Closing print pipes [ %d %d ]...",
                  job->print_pipes[0], job->print_pipes[1]);

  cupsdClosePipe(job->print_pipes);

  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "cupsdStopJob: Closing back pipes [ %d %d ]...",
                  job->back_pipes[0], job->back_pipes[1]);

  cupsdClosePipe(job->back_pipes);

  if (job->status_buffer)
  {
   /*
    * Close the pipe and clear the input bit.
    */

    cupsdLogMessage(CUPSD_LOG_DEBUG2,
                    "cupsdStopJob: Removing fd %d from InputSet...",
                    job->status_buffer->fd);

    FD_CLR(job->status_buffer->fd, InputSet);

    cupsdLogMessage(CUPSD_LOG_DEBUG2,
                    "cupsdStopJob: Closing status input pipe %d...",
                    job->status_buffer->fd);

    cupsdStatBufDelete(job->status_buffer);

    job->status_buffer = NULL;
  }
}


/*
 * 'cupsdUpdateJob()' - Read a status update from a job's filters.
 */

void
cupsdUpdateJob(cupsd_job_t *job)        /* I - Job to check */
{
  int           i;                      /* Looping var */
  int           copies;                 /* Number of copies printed */
  char          message[1024],          /* Message text */
                *ptr;                   /* Pointer update... */
  int           loglevel;               /* Log level for message */


  while ((ptr = cupsdStatBufUpdate(job->status_buffer, &loglevel,
                                   message, sizeof(message))) != NULL)
  {
   /*
    * Process page and printer state messages as needed...
    */

    if (loglevel == CUPSD_LOG_PAGE)
    {
     /*
      * Page message; send the message to the page_log file and update the
      * job sheet count...
      */

      if (job->sheets != NULL)
      {
        if (!strncasecmp(message, "total ", 6))
        {
         /*
          * Got a total count of pages from a backend or filter...
          */

          copies = atoi(message + 6);
          copies -= job->sheets->values[0].integer; /* Just track the delta */
        }
        else if (!sscanf(message, "%*d%d", &copies))
          copies = 1;
          
        job->sheets->values[0].integer += copies;

        if (job->printer->page_limit)
          cupsdUpdateQuota(job->printer, job->username, copies, 0);
      }

      cupsdLogPage(job, message);

      cupsdAddEvent(CUPSD_EVENT_JOB_PROGRESS, job->printer, job,
                    "Printed %d page(s).", job->sheets->values[0].integer);
    }
    else if (loglevel == CUPSD_LOG_STATE)
      cupsdSetPrinterReasons(job->printer, message);
    else if (loglevel == CUPSD_LOG_ATTR)
    {
     /*
      * Set attribute(s)...
      */

      /**** TODO ****/
    }

    if (!strchr(job->status_buffer->buffer, '\n'))
      break;
  }

  if (ptr == NULL)
  {
   /*
    * See if all of the filters and the backend have returned their
    * exit statuses.
    */

    for (i = 0; job->filters[i] < 0; i ++);

    if (job->filters[i])
      return;

    if (job->current_file >= job->num_files && job->backend > 0)
      return;

   /*
    * Handle the end of job stuff...
    */

    cupsdFinishJob(job);
  }
}


/*
 * 'compare_active_jobs()' - Compare the job IDs and priorities of two jobs.
 */

static int                              /* O - Difference */
compare_active_jobs(void *first,        /* I - First job */
                    void *second,       /* I - Second job */
                    void *data)         /* I - App data (not used) */
{
  int   diff;                           /* Difference */


  if ((diff = ((cupsd_job_t *)first)->priority - ((cupsd_job_t *)second)->priority) != 0)
    return (diff);
  else
    return (((cupsd_job_t *)first)->id - ((cupsd_job_t *)second)->id);
}


/*
 * 'compare_jobs()' - Compare the job IDs of two jobs.
 */

static int                              /* O - Difference */
compare_jobs(void *first,               /* I - First job */
             void *second,              /* I - Second job */
             void *data)                /* I - App data (not used) */
{
  return (((cupsd_job_t *)first)->id - ((cupsd_job_t *)second)->id);
}


/*
 * 'ipp_length()' - Compute the size of the buffer needed to hold 
 *                  the textual IPP attributes.
 */

int                                     /* O - Size of buffer to hold IPP attributes */
ipp_length(ipp_t *ipp)                  /* I - IPP request */
{
  int                   bytes;          /* Number of bytes */
  int                   i;              /* Looping var */
  ipp_attribute_t       *attr;          /* Current attribute */


 /*
  * Loop through all attributes...
  */

  bytes = 0;

  for (attr = ipp->attrs; attr != NULL; attr = attr->next)
  {
   /*
    * Skip attributes that won't be sent to filters...
    */

    if (attr->value_tag == IPP_TAG_MIMETYPE ||
        attr->value_tag == IPP_TAG_NAMELANG ||
        attr->value_tag == IPP_TAG_TEXTLANG ||
        attr->value_tag == IPP_TAG_URI ||
        attr->value_tag == IPP_TAG_URISCHEME)
      continue;

    if (strncmp(attr->name, "time-", 5) == 0)
      continue;

   /*
    * Add space for a leading space and commas between each value.
    * For the first attribute, the leading space isn't used, so the
    * extra byte can be used as the nul terminator...
    */

    bytes ++;                           /* " " separator */
    bytes += attr->num_values;          /* "," separators */

   /*
    * Boolean attributes appear as "foo,nofoo,foo,nofoo", while
    * other attributes appear as "foo=value1,value2,...,valueN".
    */

    if (attr->value_tag != IPP_TAG_BOOLEAN)
      bytes += strlen(attr->name);
    else
      bytes += attr->num_values * strlen(attr->name);

   /*
    * Now add the size required for each value in the attribute...
    */

    switch (attr->value_tag)
    {
      case IPP_TAG_INTEGER :
      case IPP_TAG_ENUM :
         /*
          * Minimum value of a signed integer is -2147483647, or 11 digits.
          */

          bytes += attr->num_values * 11;
          break;

      case IPP_TAG_BOOLEAN :
         /*
          * Add two bytes for each false ("no") value...
          */

          for (i = 0; i < attr->num_values; i ++)
            if (!attr->values[i].boolean)
              bytes += 2;
          break;

      case IPP_TAG_RANGE :
         /*
          * A range is two signed integers separated by a hyphen, or
          * 23 characters max.
          */

          bytes += attr->num_values * 23;
          break;

      case IPP_TAG_RESOLUTION :
         /*
          * A resolution is two signed integers separated by an "x" and
          * suffixed by the units, or 26 characters max.
          */

          bytes += attr->num_values * 26;
          break;

      case IPP_TAG_STRING :
      case IPP_TAG_TEXT :
      case IPP_TAG_NAME :
      case IPP_TAG_KEYWORD :
      case IPP_TAG_CHARSET :
      case IPP_TAG_LANGUAGE :
         /*
          * Strings can contain characters that need quoting.  We need
          * at least 2 * len + 2 characters to cover the quotes and
          * any backslashes in the string.
          */

          for (i = 0; i < attr->num_values; i ++)
            bytes += 2 * strlen(attr->values[i].string.text) + 2;
          break;

       default :
          break; /* anti-compiler-warning-code */
    }
  }

  return (bytes);
}


/*
 * 'set_time()' - Set one of the "time-at-xyz" attributes...
 */

static void
set_time(cupsd_job_t *job,              /* I - Job to update */
         const char  *name)             /* I - Name of attribute */
{
  ipp_attribute_t       *attr;          /* Time attribute */


  if ((attr = ippFindAttribute(job->attrs, name, IPP_TAG_ZERO)) != NULL)
  {
    attr->value_tag         = IPP_TAG_INTEGER;
    attr->values[0].integer = time(NULL);
  }
}


/*
 * 'set_hold_until()' - Set the hold time and update job-hold-until attribute...
 */

static void 
set_hold_until(cupsd_job_t *job,        /* I - Job to update */
               time_t      holdtime)    /* I - Hold until time */
{
  ipp_attribute_t       *attr;          /* job-hold-until attribute */
  struct tm             *holddate;      /* Hold date */
  char                  holdstr[64];    /* Hold time */


 /*
  * Set the hold_until value and hold the job...
  */

  cupsdLogMessage(CUPSD_LOG_DEBUG, "set_hold_until: hold_until = %d", (int)holdtime);

  job->state->values[0].integer = IPP_JOB_HELD;
  job->hold_until               = holdtime;

 /*
  * Update the job-hold-until attribute with a string representing GMT
  * time (HH:MM:SS)...
  */

  holddate = gmtime(&holdtime);
  snprintf(holdstr, sizeof(holdstr), "%d:%d:%d", holddate->tm_hour, 
           holddate->tm_min, holddate->tm_sec);

  if ((attr = ippFindAttribute(job->attrs, "job-hold-until", IPP_TAG_KEYWORD)) == NULL)
    attr = ippFindAttribute(job->attrs, "job-hold-until", IPP_TAG_NAME);

 /*
  * Either add the attribute or update the value of the existing one
  */

  if (attr == NULL)
    attr = ippAddString(job->attrs, IPP_TAG_JOB, IPP_TAG_KEYWORD,
                        "job-hold-until", NULL, holdstr);
  else
    cupsdSetString(&attr->values[0].string.text, holdstr);

  cupsdSaveJob(job);
}


/*
 * End of "$Id: job.c 4906 2006-01-10 20:53:28Z mike $".
 */