classes.c

/*
 * Printer class routines for the CUPS scheduler.
 *
 * Copyright 2007-2017 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...
 */

#include "cupsd.h"


/*
 * 'cupsdAddClass()' - Add a class to the system.
 */

cupsd_printer_t *			/* O - New class */
cupsdAddClass(const char *name)		/* I - Name of class */
{
  cupsd_printer_t	*c;		/* New class */
  char			uri[1024];	/* Class URI */


 /*
  * Add the printer and set the type to "class"...
  */

  if ((c = cupsdAddPrinter(name)) != NULL)
  {
   /*
    * Change from a printer to a class...
    */

    c->type = CUPS_PRINTER_CLASS;

    httpAssembleURIf(HTTP_URI_CODING_ALL, uri, sizeof(uri), "ipp", NULL,
		     ServerName, RemotePort, "/classes/%s", name);
    cupsdSetString(&c->uri, uri);

    cupsdSetString(&c->error_policy, "retry-current-job");
  }

  return (c);
}


/*
 * 'cupsdAddPrinterToClass()' - Add a printer to a class...
 */

void
cupsdAddPrinterToClass(
    cupsd_printer_t *c,			/* I - Class to add to */
    cupsd_printer_t *p)			/* I - Printer to add */
{
  int			i;		/* Looping var */
  cupsd_printer_t	**temp;		/* Pointer to printer array */


 /*
  * See if this printer is already a member of the class...
  */

  for (i = 0; i < c->num_printers; i ++)
    if (c->printers[i] == p)
      return;

 /*
  * Allocate memory as needed...
  */

  if (c->num_printers == 0)
    temp = malloc(sizeof(cupsd_printer_t *));
  else
    temp = realloc(c->printers, sizeof(cupsd_printer_t *) * (size_t)(c->num_printers + 1));

  if (temp == NULL)
  {
    cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to add printer %s to class %s!",
                    p->name, c->name);
    return;
  }

 /*
  * Add the printer to the end of the array and update the number of printers.
  */

  c->printers = temp;
  temp        += c->num_printers;
  c->num_printers ++;

  *temp = p;
}


/*
 * 'cupsdDeletePrinterFromClass()' - Delete a printer from a class.
 */

int					/* O - 1 if class changed, 0 otherwise */
cupsdDeletePrinterFromClass(
    cupsd_printer_t *c,			/* I - Class to delete from */
    cupsd_printer_t *p)			/* I - Printer to delete */
{
  int	i;				/* Looping var */


 /*
  * See if the printer is in the class...
  */

  for (i = 0; i < c->num_printers; i ++)
    if (p == c->printers[i])
      break;

 /*
  * If it is, remove it from the list...
  */

  if (i < c->num_printers)
  {
   /*
    * Yes, remove the printer...
    */

    c->num_printers --;
    if (i < c->num_printers)
      memmove(c->printers + i, c->printers + i + 1,
              (size_t)(c->num_printers - i) * sizeof(cupsd_printer_t *));
  }
  else
    return (0);

 /*
  * Update the IPP attributes (have to do this for member-names)...
  */

  cupsdSetPrinterAttrs(c);

  return (1);
}


/*
 * 'cupsdDeletePrinterFromClasses()' - Delete a printer from all classes.
 */

int					/* O - 1 if class changed, 0 otherwise */
cupsdDeletePrinterFromClasses(
    cupsd_printer_t *p)			/* I - Printer to delete */
{
  int			changed = 0;	/* Any class changed? */
  cupsd_printer_t	*c;		/* Pointer to current class */


 /*
  * Loop through the printer/class list and remove the printer
  * from each class listed...
  */

  for (c = (cupsd_printer_t *)cupsArrayFirst(Printers);
       c;
       c = (cupsd_printer_t *)cupsArrayNext(Printers))
    if (c->type & CUPS_PRINTER_CLASS)
      changed |= cupsdDeletePrinterFromClass(c, p);

  return (changed);
}


/*
 * 'cupsdFindAvailablePrinter()' - Find an available printer in a class.
 */

cupsd_printer_t *			/* O - Available printer or NULL */
cupsdFindAvailablePrinter(
    const char *name)			/* I - Class to check */
{
  int			i;		/* Looping var */
  cupsd_printer_t	*c;		/* Printer class */


 /*
  * Find the class...
  */

  if ((c = cupsdFindClass(name)) == NULL)
  {
    cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to find class \"%s\"!", name);
    return (NULL);
  }

  if (c->num_printers == 0)
    return (NULL);

 /*
  * Make sure that the last printer is also a valid index into the printer
  * array.  If not, reset the last printer to 0...
  */

  if (c->last_printer >= c->num_printers)
    c->last_printer = 0;

 /*
  * Loop through the printers in the class and return the first idle
  * printer...  We keep track of the last printer that we used so that
  * a "round robin" type of scheduling is realized (otherwise the first
  * server might be saturated with print jobs...)
  *
  * Thanks to Joel Fredrikson for helping us get this right!
  */

  for (i = c->last_printer + 1; ; i ++)
  {
    if (i >= c->num_printers)
      i = 0;

    if (c->printers[i]->accepting &&
        (c->printers[i]->state == IPP_PRINTER_IDLE ||
         ((c->printers[i]->type & CUPS_PRINTER_REMOTE) && !c->printers[i]->job)))
    {
      c->last_printer = i;
      return (c->printers[i]);
    }

    if (i == c->last_printer)
      break;
  }

  return (NULL);
}


/*
 * 'cupsdFindClass()' - Find the named class.
 */

cupsd_printer_t *			/* O - Matching class or NULL */
cupsdFindClass(const char *name)	/* I - Name of class */
{
  cupsd_printer_t	*c;		/* Current class/printer */


  if ((c = cupsdFindDest(name)) != NULL && (c->type & CUPS_PRINTER_CLASS))
    return (c);
  else
    return (NULL);
}


/*
 * 'cupsdLoadAllClasses()' - Load classes from the classes.conf file.
 */

void
cupsdLoadAllClasses(void)
{
  int			i;		/* Looping var */
  cups_file_t		*fp;		/* classes.conf file */
  int			linenum;	/* Current line number */
  char			line[4096],	/* Line from file */
			*value,		/* Pointer to value */
			*valueptr;	/* Pointer into value */
  cupsd_printer_t	*p,		/* Current printer class */
			*temp;		/* Temporary pointer to printer */


 /*
  * Open the classes.conf file...
  */

  snprintf(line, sizeof(line), "%s/classes.conf", ServerRoot);
  if ((fp = cupsdOpenConfFile(line)) == NULL)
    return;

 /*
  * Read class configurations until we hit EOF...
  */

  linenum = 0;
  p       = NULL;

  while (cupsFileGetConf(fp, line, sizeof(line), &value, &linenum))
  {
   /*
    * Decode the directive...
    */

    if (!_cups_strcasecmp(line, "<Class") ||
        !_cups_strcasecmp(line, "<DefaultClass"))
    {
     /*
      * <Class name> or <DefaultClass name>
      */

      if (p == NULL && value)
      {
        cupsdLogMessage(CUPSD_LOG_DEBUG, "Loading class %s...", value);

       /*
        * Since prior classes may have implicitly defined this class,
	* see if it already exists...
	*/

        if ((p = cupsdFindDest(value)) != NULL)
	{
	  p->type = CUPS_PRINTER_CLASS;
	  cupsdSetStringf(&p->uri, "ipp://%s:%d/classes/%s", ServerName,
	                  LocalPort, value);
	  cupsdSetString(&p->error_policy, "retry-job");
	}
	else
          p = cupsdAddClass(value);

	p->accepting = 1;
	p->state     = IPP_PRINTER_IDLE;

        if (!_cups_strcasecmp(line, "<DefaultClass"))
	  DefaultPrinter = p;
      }
      else
        cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Syntax error on line %d of classes.conf.", linenum);
    }
    else if (!_cups_strcasecmp(line, "</Class>") || !_cups_strcasecmp(line, "</DefaultClass>"))
    {
      if (p != NULL)
      {
        cupsdSetPrinterAttrs(p);
        p = NULL;
      }
      else
        cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Syntax error on line %d of classes.conf.", linenum);
    }
    else if (!p)
    {
      cupsdLogMessage(CUPSD_LOG_ERROR,
                      "Syntax error on line %d of classes.conf.", linenum);
    }
    else if (!_cups_strcasecmp(line, "PrinterId"))
    {
      if (value && (i = atoi(value)) > 0)
        p->printer_id = i;
      else
        cupsdLogMessage(CUPSD_LOG_ERROR, "Bad PrinterId on line %d of classes.conf.", linenum);
    }
    else if (!_cups_strcasecmp(line, "UUID"))
    {
      if (value && !strncmp(value, "urn:uuid:", 9))
        cupsdSetString(&(p->uuid), value);
      else
        cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Bad UUID on line %d of classes.conf.", linenum);
    }
    else if (!_cups_strcasecmp(line, "AuthInfoRequired"))
    {
      if (!cupsdSetAuthInfoRequired(p, value, NULL))
	cupsdLogMessage(CUPSD_LOG_ERROR,
			"Bad AuthInfoRequired on line %d of classes.conf.",
			linenum);
    }
    else if (!_cups_strcasecmp(line, "Info"))
    {
      if (value)
        cupsdSetString(&p->info, value);
    }
    else if (!_cups_strcasecmp(line, "Location"))
    {
      if (value)
        cupsdSetString(&p->location, value);
    }
    else if (!_cups_strcasecmp(line, "Option") && value)
    {
     /*
      * Option name value
      */

      for (valueptr = value; *valueptr && !isspace(*valueptr & 255); valueptr ++);

      if (!*valueptr)
        cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Syntax error on line %d of classes.conf.", linenum);
      else
      {
        for (; *valueptr && isspace(*valueptr & 255); *valueptr++ = '\0');

        p->num_options = cupsAddOption(value, valueptr, p->num_options,
	                               &(p->options));
      }
    }
    else if (!_cups_strcasecmp(line, "Printer"))
    {
      if (!value)
      {
	cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Syntax error on line %d of classes.conf.", linenum);
        continue;
      }
      else if ((temp = cupsdFindPrinter(value)) == NULL)
      {
	cupsdLogMessage(CUPSD_LOG_WARN,
	                "Unknown printer %s on line %d of classes.conf.",
	                value, linenum);

       /*
	* Add the missing remote printer...
	*/

	if ((temp = cupsdAddPrinter(value)) != NULL)
	{
	  cupsdSetString(&temp->make_model, "Remote Printer on unknown");

          temp->state = IPP_PRINTER_STOPPED;
	  temp->type  |= CUPS_PRINTER_REMOTE;

	  cupsdSetString(&temp->location, "Location Unknown");
	  cupsdSetString(&temp->info, "No Information Available");
	  temp->hostname[0] = '\0';

	  cupsdSetPrinterAttrs(temp);
	}
      }

      if (temp)
        cupsdAddPrinterToClass(p, temp);
    }
    else if (!_cups_strcasecmp(line, "State"))
    {
     /*
      * Set the initial queue state...
      */

      if (!_cups_strcasecmp(value, "idle"))
        p->state = IPP_PRINTER_IDLE;
      else if (!_cups_strcasecmp(value, "stopped"))
      {
        p->state = IPP_PRINTER_STOPPED;

        for (i = 0 ; i < p->num_reasons; i ++)
	  if (!strcmp("paused", p->reasons[i]))
	    break;

        if (i >= p->num_reasons &&
	    p->num_reasons < (int)(sizeof(p->reasons) / sizeof(p->reasons[0])))
	{
	  p->reasons[p->num_reasons] = _cupsStrAlloc("paused");
	  p->num_reasons ++;
	}
      }
      else
	cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Syntax error on line %d of classes.conf.",
	                linenum);
    }
    else if (!_cups_strcasecmp(line, "StateMessage"))
    {
     /*
      * Set the initial queue state message...
      */

      if (value)
	strlcpy(p->state_message, value, sizeof(p->state_message));
    }
    else if (!_cups_strcasecmp(line, "StateTime"))
    {
     /*
      * Set the state time...
      */

      if (value)
        p->state_time = atoi(value);
    }
    else if (!_cups_strcasecmp(line, "Accepting"))
    {
     /*
      * Set the initial accepting state...
      */

      if (value &&
          (!_cups_strcasecmp(value, "yes") ||
           !_cups_strcasecmp(value, "on") ||
           !_cups_strcasecmp(value, "true")))
        p->accepting = 1;
      else if (value &&
               (!_cups_strcasecmp(value, "no") ||
        	!_cups_strcasecmp(value, "off") ||
        	!_cups_strcasecmp(value, "false")))
        p->accepting = 0;
      else
	cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Syntax error on line %d of classes.conf.",
	                linenum);
    }
    else if (!_cups_strcasecmp(line, "Shared"))
    {
     /*
      * Set the initial shared state...
      */

      if (value &&
          (!_cups_strcasecmp(value, "yes") ||
           !_cups_strcasecmp(value, "on") ||
           !_cups_strcasecmp(value, "true")))
        p->shared = 1;
      else if (value &&
               (!_cups_strcasecmp(value, "no") ||
        	!_cups_strcasecmp(value, "off") ||
        	!_cups_strcasecmp(value, "false")))
        p->shared = 0;
      else
	cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Syntax error on line %d of classes.conf.",
	                linenum);
    }
    else if (!_cups_strcasecmp(line, "JobSheets"))
    {
     /*
      * Set the initial job sheets...
      */

      if (value)
      {
	for (valueptr = value;
	     *valueptr && !isspace(*valueptr & 255);
	     valueptr ++);

	if (*valueptr)
          *valueptr++ = '\0';

	cupsdSetString(&p->job_sheets[0], value);

	while (isspace(*valueptr & 255))
          valueptr ++;

	if (*valueptr)
	{
          for (value = valueptr;
	       *valueptr && !isspace(*valueptr & 255);
	       valueptr ++);

	  if (*valueptr)
            *valueptr = '\0';

	  cupsdSetString(&p->job_sheets[1], value);
	}
      }
      else
	cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Syntax error on line %d of classes.conf.", linenum);
    }
    else if (!_cups_strcasecmp(line, "AllowUser"))
    {
      if (value)
      {
        p->deny_users = 0;
        cupsdAddString(&(p->users), value);
      }
      else
	cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Syntax error on line %d of classes.conf.", linenum);
    }
    else if (!_cups_strcasecmp(line, "DenyUser"))
    {
      if (value)
      {
        p->deny_users = 1;
        cupsdAddString(&(p->users), value);
      }
      else
	cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Syntax error on line %d of classes.conf.", linenum);
    }
    else if (!_cups_strcasecmp(line, "QuotaPeriod"))
    {
      if (value)
        p->quota_period = atoi(value);
      else
	cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Syntax error on line %d of classes.conf.", linenum);
    }
    else if (!_cups_strcasecmp(line, "PageLimit"))
    {
      if (value)
        p->page_limit = atoi(value);
      else
	cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Syntax error on line %d of classes.conf.", linenum);
    }
    else if (!_cups_strcasecmp(line, "KLimit"))
    {
      if (value)
        p->k_limit = atoi(value);
      else
	cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Syntax error on line %d of classes.conf.", linenum);
    }
    else if (!_cups_strcasecmp(line, "OpPolicy"))
    {
      if (value)
      {
        cupsd_policy_t *pol;		/* Policy */


        if ((pol = cupsdFindPolicy(value)) != NULL)
	{
          cupsdSetString(&p->op_policy, value);
	  p->op_policy_ptr = pol;
	}
	else
	  cupsdLogMessage(CUPSD_LOG_ERROR,
	                  "Bad policy \"%s\" on line %d of classes.conf",
			  value, linenum);
      }
      else
	cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Syntax error on line %d of classes.conf.", linenum);
    }
    else if (!_cups_strcasecmp(line, "ErrorPolicy"))
    {
      if (value)
      {
        if (strcmp(value, "retry-current-job") && strcmp(value, "retry-job"))
	  cupsdLogMessage(CUPSD_LOG_WARN,
	                  "ErrorPolicy %s ignored on line %d of classes.conf",
			  value, linenum);
      }
      else
	cupsdLogMessage(CUPSD_LOG_ERROR,
	                "Syntax error on line %d of classes.conf.", linenum);
    }
    else
    {
     /*
      * Something else we don't understand...
      */

      cupsdLogMessage(CUPSD_LOG_ERROR,
                      "Unknown configuration directive %s on line %d of classes.conf.",
	              line, linenum);
    }
  }

  cupsFileClose(fp);
}


/*
 * 'cupsdSaveAllClasses()' - Save classes to the classes.conf file.
 */

void
cupsdSaveAllClasses(void)
{
  cups_file_t		*fp;		/* classes.conf file */
  char			filename[1024],	/* classes.conf filename */
			value[2048],	/* Value string */
			*name;		/* Current user name */
  cupsd_printer_t	*pclass;	/* Current printer class */
  int			i;		/* Looping var */
  cups_option_t		*option;	/* Current option */


 /*
  * Create the classes.conf file...
  */

  snprintf(filename, sizeof(filename), "%s/classes.conf", ServerRoot);

  if ((fp = cupsdCreateConfFile(filename, ConfigFilePerm)) == NULL)
    return;

  cupsdLogMessage(CUPSD_LOG_INFO, "Saving classes.conf...");

 /*
  * Write a small header to the file...
  */

  cupsFilePuts(fp, "# Class configuration file for " CUPS_SVERSION "\n");
  cupsFilePrintf(fp, "# Written by cupsd\n");
  cupsFilePuts(fp, "# DO NOT EDIT THIS FILE WHEN CUPSD IS RUNNING\n");

 /*
  * Write each local class known to the system...
  */

  for (pclass = (cupsd_printer_t *)cupsArrayFirst(Printers);
       pclass;
       pclass = (cupsd_printer_t *)cupsArrayNext(Printers))
  {
   /*
    * Skip remote destinations and regular printers...
    */

    if ((pclass->type & CUPS_PRINTER_REMOTE) ||
        !(pclass->type & CUPS_PRINTER_CLASS))
      continue;

   /*
    * Write printers as needed...
    */

    if (pclass == DefaultPrinter)
      cupsFilePrintf(fp, "<DefaultClass %s>\n", pclass->name);
    else
      cupsFilePrintf(fp, "<Class %s>\n", pclass->name);

    if (pclass->printer_id)
      cupsFilePrintf(fp, "PrinterId %d\n", pclass->printer_id);

    cupsFilePrintf(fp, "UUID %s\n", pclass->uuid);

    if (pclass->num_auth_info_required > 0)
    {
      switch (pclass->num_auth_info_required)
      {
        case 1 :
            strlcpy(value, pclass->auth_info_required[0], sizeof(value));
	    break;

        case 2 :
            snprintf(value, sizeof(value), "%s,%s",
	             pclass->auth_info_required[0],
		     pclass->auth_info_required[1]);
	    break;

        case 3 :
	default :
            snprintf(value, sizeof(value), "%s,%s,%s",
	             pclass->auth_info_required[0],
		     pclass->auth_info_required[1],
		     pclass->auth_info_required[2]);
	    break;
      }

      cupsFilePutConf(fp, "AuthInfoRequired", value);
    }

    if (pclass->info)
      cupsFilePutConf(fp, "Info", pclass->info);

    if (pclass->location)
      cupsFilePutConf(fp, "Location", pclass->location);

    if (pclass->state == IPP_PRINTER_STOPPED)
      cupsFilePuts(fp, "State Stopped\n");
    else
      cupsFilePuts(fp, "State Idle\n");

    cupsFilePrintf(fp, "StateTime %d\n", (int)pclass->state_time);

    if (pclass->accepting)
      cupsFilePuts(fp, "Accepting Yes\n");
    else
      cupsFilePuts(fp, "Accepting No\n");

    if (pclass->shared)
      cupsFilePuts(fp, "Shared Yes\n");
    else
      cupsFilePuts(fp, "Shared No\n");

    snprintf(value, sizeof(value), "%s %s", pclass->job_sheets[0],
             pclass->job_sheets[1]);
    cupsFilePutConf(fp, "JobSheets", value);

    for (i = 0; i < pclass->num_printers; i ++)
      cupsFilePrintf(fp, "Printer %s\n", pclass->printers[i]->name);

    cupsFilePrintf(fp, "QuotaPeriod %d\n", pclass->quota_period);
    cupsFilePrintf(fp, "PageLimit %d\n", pclass->page_limit);
    cupsFilePrintf(fp, "KLimit %d\n", pclass->k_limit);

    for (name = (char *)cupsArrayFirst(pclass->users);
         name;
	 name = (char *)cupsArrayNext(pclass->users))
      cupsFilePutConf(fp, pclass->deny_users ? "DenyUser" : "AllowUser", name);

     if (pclass->op_policy)
      cupsFilePutConf(fp, "OpPolicy", pclass->op_policy);
    if (pclass->error_policy)
      cupsFilePutConf(fp, "ErrorPolicy", pclass->error_policy);

    for (i = pclass->num_options, option = pclass->options;
         i > 0;
	 i --, option ++)
    {
      snprintf(value, sizeof(value), "%s %s", option->name, option->value);
      cupsFilePutConf(fp, "Option", value);
    }

    if (pclass == DefaultPrinter)
      cupsFilePuts(fp, "</DefaultClass>\n");
    else
      cupsFilePuts(fp, "</Class>\n");
  }

  cupsdCloseCreatedConfFile(fp, filename);
}