aosp12/external/libcups/cups/adminutil.c

/*
 * Administration utility API definitions for CUPS.
 *
 * Copyright © 2007-2019 by Apple Inc.
 * Copyright © 2001-2007 by Easy Software Products.
 *
 * Licensed under Apache License v2.0.  See the file "LICENSE" for more
 * information.
 */

/*
 * Include necessary headers...
 */

#include "cups-private.h"
#include "debug-internal.h"
#include "ppd.h"
#include "adminutil.h"
#include <fcntl.h>
#include <sys/stat.h>
#ifndef _WIN32
#  include <unistd.h>
#  include <sys/wait.h>
#endif /* !_WIN32 */


/*
 * Local functions...
 */

static http_status_t	get_cupsd_conf(http_t *http, _cups_globals_t *cg,
			               time_t last_update, char *name,
				       size_t namelen, int *remote);
static void		invalidate_cupsd_cache(_cups_globals_t *cg);


/*
 * 'cupsAdminCreateWindowsPPD()' - Create the Windows PPD file for a printer.
 *
 * @deprecated@
 */

char *					/* O - PPD file or NULL */
cupsAdminCreateWindowsPPD(
    http_t     *http,			/* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
    const char *dest,			/* I - Printer or class */
    char       *buffer,			/* I - Filename buffer */
    int        bufsize)			/* I - Size of filename buffer */
{
  (void)http;
  (void)dest;
  (void)bufsize;

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

  return (NULL);
}


/*
 * 'cupsAdminExportSamba()' - Export a printer to Samba.
 *
 * @deprecated@
 */

int					/* O - 1 on success, 0 on failure */
cupsAdminExportSamba(
    const char *dest,			/* I - Destination to export */
    const char *ppd,			/* I - PPD file */
    const char *samba_server,		/* I - Samba server */
    const char *samba_user,		/* I - Samba username */
    const char *samba_password,		/* I - Samba password */
    FILE       *logfile)		/* I - Log file, if any */
{
  (void)dest;
  (void)ppd;
  (void)samba_server;
  (void)samba_user;
  (void)samba_password;
  (void)logfile;

  return (0);
}


/*
 * 'cupsAdminGetServerSettings()' - Get settings from the server.
 *
 * The returned settings should be freed with cupsFreeOptions() when
 * you are done with them.
 *
 * @since CUPS 1.3/macOS 10.5@
 */

int					/* O - 1 on success, 0 on failure */
cupsAdminGetServerSettings(
    http_t        *http,		/* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
    int           *num_settings,	/* O - Number of settings */
    cups_option_t **settings)		/* O - Settings */
{
  int		i;			/* Looping var */
  cups_file_t	*cupsd;			/* cupsd.conf file */
  char		cupsdconf[1024];	/* cupsd.conf filename */
  int		remote;			/* Remote cupsd.conf file? */
  http_status_t	status;			/* Status of getting cupsd.conf */
  char		line[1024],		/* Line from cupsd.conf file */
		*value;			/* Value on line */
  cups_option_t	*setting;		/* Current setting */
  _cups_globals_t *cg = _cupsGlobals();	/* Global data */


 /*
  * Range check input...
  */

  if (!http)
  {
   /*
    * See if we are connected to the same server...
    */

    if (cg->http)
    {
     /*
      * Compare the connection hostname, port, and encryption settings to
      * the cached defaults; these were initialized the first time we
      * connected...
      */

      if (strcmp(cg->http->hostname, cg->server) ||
          cg->ipp_port != httpAddrPort(cg->http->hostaddr) ||
	  (cg->http->encryption != cg->encryption &&
	   cg->http->encryption == HTTP_ENCRYPTION_NEVER))
      {
       /*
	* Need to close the current connection because something has changed...
	*/

	httpClose(cg->http);
	cg->http = NULL;
      }
    }

   /*
    * (Re)connect as needed...
    */

    if (!cg->http)
    {
      if ((cg->http = httpConnect2(cupsServer(), ippPort(), NULL, AF_UNSPEC,
                                   cupsEncryption(), 1, 0, NULL)) == NULL)
      {
	if (errno)
	  _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE, NULL, 0);
	else
	  _cupsSetError(IPP_STATUS_ERROR_SERVICE_UNAVAILABLE,
			_("Unable to connect to host."), 1);

	if (num_settings)
	  *num_settings = 0;

	if (settings)
	  *settings = NULL;

	return (0);
      }
    }

    http = cg->http;
  }

  if (!http || !num_settings || !settings)
  {
    _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0);

    if (num_settings)
      *num_settings = 0;

    if (settings)
      *settings = NULL;

    return (0);
  }

  *num_settings = 0;
  *settings     = NULL;

 /*
  * Get the cupsd.conf file...
  */

  if ((status = get_cupsd_conf(http, cg, cg->cupsd_update, cupsdconf,
                               sizeof(cupsdconf), &remote)) == HTTP_STATUS_OK)
  {
    if ((cupsd = cupsFileOpen(cupsdconf, "r")) == NULL)
    {
      char	message[1024];		/* Message string */


      snprintf(message, sizeof(message),
               _cupsLangString(cupsLangDefault(), _("Open of %s failed: %s")),
               cupsdconf, strerror(errno));
      _cupsSetError(IPP_STATUS_ERROR_INTERNAL, message, 0);
    }
  }
  else
    cupsd = NULL;

  if (cupsd)
  {
   /*
    * Read the file, keeping track of what settings are enabled...
    */

    int		remote_access = 0,	/* Remote access allowed? */
		remote_admin = 0,	/* Remote administration allowed? */
		remote_any = 0,		/* Remote access from anywhere allowed? */
		browsing = 1,		/* Browsing enabled? */
		cancel_policy = 1,	/* Cancel-job policy set? */
		debug_logging = 0;	/* LogLevel debug set? */
    int		linenum = 0,		/* Line number in file */
		in_location = 0,	/* In a location section? */
		in_policy = 0,		/* In a policy section? */
		in_cancel_job = 0,	/* In a cancel-job section? */
		in_admin_location = 0;	/* In the /admin location? */


    invalidate_cupsd_cache(cg);

    cg->cupsd_update = time(NULL);
    httpGetHostname(http, cg->cupsd_hostname, sizeof(cg->cupsd_hostname));

    while (cupsFileGetConf(cupsd, line, sizeof(line), &value, &linenum))
    {
      if (!value && strncmp(line, "</", 2))
        value = line + strlen(line);

      if ((!_cups_strcasecmp(line, "Port") || !_cups_strcasecmp(line, "Listen")) && value)
      {
	char	*port;			/* Pointer to port number, if any */


	if ((port = strrchr(value, ':')) != NULL)
	  *port = '\0';
	else if (isdigit(*value & 255))
	{
	 /*
	  * Listen on a port number implies remote access...
	  */

	  remote_access = 1;
	  continue;
	}

	if (_cups_strcasecmp(value, "localhost") && strcmp(value, "127.0.0.1")
#ifdef AF_LOCAL
            && *value != '/'
#endif /* AF_LOCAL */
#ifdef AF_INET6
            && strcmp(value, "[::1]")
#endif /* AF_INET6 */
	    )
	  remote_access = 1;
      }
      else if (!_cups_strcasecmp(line, "Browsing"))
      {
	browsing = !_cups_strcasecmp(value, "yes") ||
	           !_cups_strcasecmp(value, "on") ||
	           !_cups_strcasecmp(value, "true");
      }
      else if (!_cups_strcasecmp(line, "LogLevel"))
      {
	debug_logging = !_cups_strncasecmp(value, "debug", 5);
      }
      else if (!_cups_strcasecmp(line, "<Policy") &&
               !_cups_strcasecmp(value, "default"))
      {
	in_policy = 1;
      }
      else if (!_cups_strcasecmp(line, "</Policy>"))
      {
	in_policy = 0;
      }
      else if (!_cups_strcasecmp(line, "<Limit") && in_policy && value)
      {
       /*
	* See if the policy limit is for the Cancel-Job operation...
	*/

	char	*valptr;		/* Pointer into value */


	while (*value)
	{
	  for (valptr = value; *valptr && !_cups_isspace(*valptr); valptr ++);

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

          if (!_cups_strcasecmp(value, "cancel-job") ||
              !_cups_strcasecmp(value, "all"))
	  {
	    in_cancel_job = 1;
	    break;
	  }

          for (value = valptr; _cups_isspace(*value); value ++);
	}
      }
      else if (!_cups_strcasecmp(line, "</Limit>"))
      {
	in_cancel_job = 0;
      }
      else if (!_cups_strcasecmp(line, "Require") && in_cancel_job)
      {
	cancel_policy = 0;
      }
      else if (!_cups_strcasecmp(line, "<Location") && value)
      {
        in_admin_location = !_cups_strcasecmp(value, "/admin");
	in_location       = 1;
      }
      else if (!_cups_strcasecmp(line, "</Location>"))
      {
	in_admin_location = 0;
	in_location       = 0;
      }
      else if (!_cups_strcasecmp(line, "Allow") && value &&
               _cups_strcasecmp(value, "localhost") &&
               _cups_strcasecmp(value, "127.0.0.1")
#ifdef AF_LOCAL
	       && *value != '/'
#endif /* AF_LOCAL */
#ifdef AF_INET6
	       && strcmp(value, "::1")
#endif /* AF_INET6 */
	       )
      {
        if (in_admin_location)
	  remote_admin = 1;
        else if (!_cups_strcasecmp(value, "all"))
	  remote_any = 1;
      }
      else if (line[0] != '<' && !in_location && !in_policy &&
	       _cups_strcasecmp(line, "Allow") &&
               _cups_strcasecmp(line, "AuthType") &&
	       _cups_strcasecmp(line, "Deny") &&
	       _cups_strcasecmp(line, "Order") &&
	       _cups_strcasecmp(line, "Require") &&
	       _cups_strcasecmp(line, "Satisfy"))
        cg->cupsd_num_settings = cupsAddOption(line, value,
	                                       cg->cupsd_num_settings,
					       &(cg->cupsd_settings));
    }

    cupsFileClose(cupsd);

    cg->cupsd_num_settings = cupsAddOption(CUPS_SERVER_DEBUG_LOGGING,
                                           debug_logging ? "1" : "0",
					   cg->cupsd_num_settings,
					   &(cg->cupsd_settings));

    cg->cupsd_num_settings = cupsAddOption(CUPS_SERVER_REMOTE_ADMIN,
                                           (remote_access && remote_admin) ?
					       "1" : "0",
					   cg->cupsd_num_settings,
					   &(cg->cupsd_settings));

    cg->cupsd_num_settings = cupsAddOption(CUPS_SERVER_REMOTE_ANY,
                                           remote_any ? "1" : "0",
					   cg->cupsd_num_settings,
					   &(cg->cupsd_settings));

    cg->cupsd_num_settings = cupsAddOption(CUPS_SERVER_SHARE_PRINTERS,
                                           (remote_access && browsing) ? "1" :
                                                                         "0",
					   cg->cupsd_num_settings,
					   &(cg->cupsd_settings));

    cg->cupsd_num_settings = cupsAddOption(CUPS_SERVER_USER_CANCEL_ANY,
                                           cancel_policy ? "1" : "0",
					   cg->cupsd_num_settings,
					   &(cg->cupsd_settings));
  }
  else if (status != HTTP_STATUS_NOT_MODIFIED)
    invalidate_cupsd_cache(cg);

 /*
  * Remove any temporary files and copy the settings array...
  */

  if (remote)
    unlink(cupsdconf);

  for (i = cg->cupsd_num_settings, setting = cg->cupsd_settings;
       i > 0;
       i --, setting ++)
    *num_settings = cupsAddOption(setting->name, setting->value,
                                  *num_settings, settings);

  return (cg->cupsd_num_settings > 0);
}


/*
 * 'cupsAdminSetServerSettings()' - Set settings on the server.
 *
 * @since CUPS 1.3/macOS 10.5@
 */

int					/* O - 1 on success, 0 on failure */
cupsAdminSetServerSettings(
    http_t        *http,		/* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
    int           num_settings,		/* I - Number of settings */
    cups_option_t *settings)		/* I - Settings */
{
  int		i;			/* Looping var */
  http_status_t status;			/* GET/PUT status */
  const char	*server_port_env;	/* SERVER_PORT env var */
  int		server_port;		/* IPP port for server */
  cups_file_t	*cupsd;			/* cupsd.conf file */
  char		cupsdconf[1024];	/* cupsd.conf filename */
  int		remote;			/* Remote cupsd.conf file? */
  char		tempfile[1024];		/* Temporary new cupsd.conf */
  cups_file_t	*temp;			/* Temporary file */
  char		line[1024],		/* Line from cupsd.conf file */
		*value;			/* Value on line */
  int		linenum,		/* Line number in file */
		in_location,		/* In a location section? */
		in_policy,		/* In a policy section? */
		in_default_policy,	/* In the default policy section? */
		in_cancel_job,		/* In a cancel-job section? */
		in_admin_location,	/* In the /admin location? */
		in_conf_location,	/* In the /admin/conf location? */
		in_log_location,	/* In the /admin/log location? */
		in_root_location;	/* In the / location? */
  const char	*val;			/* Setting value */
  int		share_printers,		/* Share local printers */
		remote_admin,		/* Remote administration allowed? */
		remote_any,		/* Remote access from anywhere? */
		user_cancel_any,	/* Cancel-job policy set? */
		debug_logging;		/* LogLevel debug set? */
  int		wrote_port_listen,	/* Wrote the port/listen lines? */
		wrote_browsing,		/* Wrote the browsing lines? */
		wrote_policy,		/* Wrote the policy? */
		wrote_loglevel,		/* Wrote the LogLevel line? */
		wrote_admin_location,	/* Wrote the /admin location? */
		wrote_conf_location,	/* Wrote the /admin/conf location? */
		wrote_log_location,	/* Wrote the /admin/log location? */
		wrote_root_location;	/* Wrote the / location? */
  int		indent;			/* Indentation */
  int		cupsd_num_settings;	/* New number of settings */
  int		old_share_printers,	/* Share local printers */
		old_remote_admin,	/* Remote administration allowed? */
		old_remote_any,		/* Remote access from anywhere? */
		old_user_cancel_any,	/* Cancel-job policy set? */
		old_debug_logging;	/* LogLevel debug set? */
  cups_option_t	*cupsd_settings,	/* New settings */
		*setting;		/* Current setting */
  _cups_globals_t *cg = _cupsGlobals();	/* Global data */


 /*
  * Range check input...
  */

  if (!http)
    http = _cupsConnect();

  if (!http || !num_settings || !settings)
  {
    _cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(EINVAL), 0);

    return (0);
  }

 /*
  * Get the cupsd.conf file...
  */

  if (get_cupsd_conf(http, cg, 0, cupsdconf, sizeof(cupsdconf),
                     &remote) == HTTP_STATUS_OK)
  {
    if ((cupsd = cupsFileOpen(cupsdconf, "r")) == NULL)
    {
      _cupsSetError(IPP_STATUS_ERROR_INTERNAL, NULL, 0);
      return (0);
    }
  }
  else
    return (0);

 /*
  * Get current settings...
  */

  if (!cupsAdminGetServerSettings(http, &cupsd_num_settings,
				  &cupsd_settings))
    return (0);

  if ((val = cupsGetOption(CUPS_SERVER_DEBUG_LOGGING, cupsd_num_settings,
                           cupsd_settings)) != NULL)
    old_debug_logging = atoi(val);
  else
    old_debug_logging = 0;

  DEBUG_printf(("1cupsAdminSetServerSettings: old debug_logging=%d",
                old_debug_logging));

  if ((val = cupsGetOption(CUPS_SERVER_REMOTE_ADMIN, cupsd_num_settings,
                           cupsd_settings)) != NULL)
    old_remote_admin = atoi(val);
  else
    old_remote_admin = 0;

  DEBUG_printf(("1cupsAdminSetServerSettings: old remote_admin=%d",
                old_remote_admin));

  if ((val = cupsGetOption(CUPS_SERVER_REMOTE_ANY, cupsd_num_settings,
                           cupsd_settings)) != NULL)
    old_remote_any = atoi(val);
  else
    old_remote_any = 0;

  DEBUG_printf(("1cupsAdminSetServerSettings: old remote_any=%d",
                old_remote_any));

  if ((val = cupsGetOption(CUPS_SERVER_SHARE_PRINTERS, cupsd_num_settings,
                           cupsd_settings)) != NULL)
    old_share_printers = atoi(val);
  else
    old_share_printers = 0;

  DEBUG_printf(("1cupsAdminSetServerSettings: old share_printers=%d",
                old_share_printers));

  if ((val = cupsGetOption(CUPS_SERVER_USER_CANCEL_ANY, cupsd_num_settings,
                           cupsd_settings)) != NULL)
    old_user_cancel_any = atoi(val);
  else
    old_user_cancel_any = 0;

  DEBUG_printf(("1cupsAdminSetServerSettings: old user_cancel_any=%d",
                old_user_cancel_any));

  cupsFreeOptions(cupsd_num_settings, cupsd_settings);

 /*
  * Get basic settings...
  */

  if ((val = cupsGetOption(CUPS_SERVER_DEBUG_LOGGING, num_settings,
                           settings)) != NULL)
  {
    debug_logging = atoi(val);

    if (debug_logging == old_debug_logging)
    {
     /*
      * No change to this setting...
      */

      debug_logging = -1;
    }
  }
  else
    debug_logging = -1;

  DEBUG_printf(("1cupsAdminSetServerSettings: debug_logging=%d",
                debug_logging));

  if ((val = cupsGetOption(CUPS_SERVER_REMOTE_ANY, num_settings, settings)) != NULL)
  {
    remote_any = atoi(val);

    if (remote_any == old_remote_any)
    {
     /*
      * No change to this setting...
      */

      remote_any = -1;
    }
  }
  else
    remote_any = -1;

  DEBUG_printf(("1cupsAdminSetServerSettings: remote_any=%d", remote_any));

  if ((val = cupsGetOption(CUPS_SERVER_REMOTE_ADMIN, num_settings,
                           settings)) != NULL)
  {
    remote_admin = atoi(val);

    if (remote_admin == old_remote_admin)
    {
     /*
      * No change to this setting...
      */

      remote_admin = -1;
    }
  }
  else
    remote_admin = -1;

  DEBUG_printf(("1cupsAdminSetServerSettings: remote_admin=%d",
                remote_admin));

  if ((val = cupsGetOption(CUPS_SERVER_SHARE_PRINTERS, num_settings,
                           settings)) != NULL)
  {
    share_printers = atoi(val);

    if (share_printers == old_share_printers)
    {
     /*
      * No change to this setting...
      */

      share_printers = -1;
    }
  }
  else
    share_printers = -1;

  DEBUG_printf(("1cupsAdminSetServerSettings: share_printers=%d",
                share_printers));

  if ((val = cupsGetOption(CUPS_SERVER_USER_CANCEL_ANY, num_settings,
                           settings)) != NULL)
  {
    user_cancel_any = atoi(val);

    if (user_cancel_any == old_user_cancel_any)
    {
     /*
      * No change to this setting...
      */

      user_cancel_any = -1;
    }
  }
  else
    user_cancel_any = -1;

  DEBUG_printf(("1cupsAdminSetServerSettings: user_cancel_any=%d",
                user_cancel_any));

 /*
  * Create a temporary file for the new cupsd.conf file...
  */

  if ((temp = cupsTempFile2(tempfile, sizeof(tempfile))) == NULL)
  {
    cupsFileClose(cupsd);

    if (remote)
      unlink(cupsdconf);

    _cupsSetError(IPP_STATUS_ERROR_INTERNAL, NULL, 0);
    return (0);
  }

 /*
  * Copy the old file to the new, making changes along the way...
  */

  cupsd_num_settings   = 0;
  in_admin_location    = 0;
  in_cancel_job        = 0;
  in_conf_location     = 0;
  in_default_policy    = 0;
  in_location          = 0;
  in_log_location      = 0;
  in_policy            = 0;
  in_root_location     = 0;
  linenum              = 0;
  wrote_admin_location = 0;
  wrote_browsing       = 0;
  wrote_conf_location  = 0;
  wrote_log_location   = 0;
  wrote_loglevel       = 0;
  wrote_policy         = 0;
  wrote_port_listen    = 0;
  wrote_root_location  = 0;
  indent               = 0;

  if ((server_port_env = getenv("SERVER_PORT")) != NULL)
  {
    if ((server_port = atoi(server_port_env)) <= 0)
      server_port = ippPort();
  }
  else
    server_port = ippPort();

  if (server_port <= 0)
    server_port = IPP_PORT;

  while (cupsFileGetConf(cupsd, line, sizeof(line), &value, &linenum))
  {
    if ((!_cups_strcasecmp(line, "Port") || !_cups_strcasecmp(line, "Listen")) &&
        (remote_admin >= 0 || remote_any >= 0 || share_printers >= 0))
    {
      if (!wrote_port_listen)
      {
        wrote_port_listen = 1;

	if (remote_admin > 0 || remote_any > 0 || share_printers > 0)
	{
	  cupsFilePuts(temp, "# Allow remote access\n");
	  cupsFilePrintf(temp, "Port %d\n", server_port);
	}
	else
	{
	  cupsFilePuts(temp, "# Only listen for connections from the local "
	                     "machine.\n");
	  cupsFilePrintf(temp, "Listen localhost:%d\n", server_port);
	}

#ifdef CUPS_DEFAULT_DOMAINSOCKET
        if ((!value || strcmp(CUPS_DEFAULT_DOMAINSOCKET, value)) &&
	    !access(CUPS_DEFAULT_DOMAINSOCKET, 0))
          cupsFilePuts(temp, "Listen " CUPS_DEFAULT_DOMAINSOCKET "\n");
#endif /* CUPS_DEFAULT_DOMAINSOCKET */
      }
      else if (value && value[0] == '/'
#ifdef CUPS_DEFAULT_DOMAINSOCKET
               && strcmp(CUPS_DEFAULT_DOMAINSOCKET, value)
#endif /* CUPS_DEFAULT_DOMAINSOCKET */
               )
        cupsFilePrintf(temp, "Listen %s\n", value);
    }
    else if ((!_cups_strcasecmp(line, "Browsing") ||
              !_cups_strcasecmp(line, "BrowseLocalProtocols")) &&
	     share_printers >= 0)
    {
      if (!wrote_browsing)
      {
        wrote_browsing = 1;

        if (share_printers)
	{
	  const char *localp = cupsGetOption("BrowseLocalProtocols",
					     num_settings, settings);

          if (!localp || !localp[0])
	    localp = cupsGetOption("BrowseLocalProtocols", cupsd_num_settings,
	                           cupsd_settings);

	  cupsFilePuts(temp, "# Share local printers on the local network.\n");
	  cupsFilePuts(temp, "Browsing On\n");

	  if (!localp)
	    localp = CUPS_DEFAULT_BROWSE_LOCAL_PROTOCOLS;

	  cupsFilePrintf(temp, "BrowseLocalProtocols %s\n", localp);

	  cupsd_num_settings = cupsAddOption("BrowseLocalProtocols", localp,
					     cupsd_num_settings,
					     &cupsd_settings);
        }
	else
	{
	  cupsFilePuts(temp, "# Disable printer sharing.\n");
	  cupsFilePuts(temp, "Browsing Off\n");
	}
      }
    }
    else if (!_cups_strcasecmp(line, "LogLevel") && debug_logging >= 0)
    {
      wrote_loglevel = 1;

      if (debug_logging)
      {
        cupsFilePuts(temp,
	             "# Show troubleshooting information in error_log.\n");
	cupsFilePuts(temp, "LogLevel debug\n");
      }
      else
      {
        cupsFilePuts(temp, "# Show general information in error_log.\n");
	cupsFilePuts(temp, "LogLevel " CUPS_DEFAULT_LOG_LEVEL "\n");
      }
    }
    else if (!_cups_strcasecmp(line, "<Policy"))
    {
      in_default_policy = !_cups_strcasecmp(value, "default");
      in_policy         = 1;

      cupsFilePrintf(temp, "%s %s>\n", line, value);
      indent += 2;
    }
    else if (!_cups_strcasecmp(line, "</Policy>"))
    {
      indent -= 2;
      if (!wrote_policy && in_default_policy)
      {
	wrote_policy = 1;

        if (!user_cancel_any)
	  cupsFilePuts(temp, "  # Only the owner or an administrator can "
	                     "cancel a job...\n"
	                     "  <Limit Cancel-Job>\n"
	                     "    Order deny,allow\n"
			     "    Require user @OWNER "
			     CUPS_DEFAULT_PRINTOPERATOR_AUTH "\n"
			     "  </Limit>\n");
      }

      in_policy         = 0;
      in_default_policy = 0;

      cupsFilePuts(temp, "</Policy>\n");
    }
    else if (!_cups_strcasecmp(line, "<Location"))
    {
      in_location = 1;
      indent += 2;
      if (!strcmp(value, "/admin"))
	in_admin_location = 1;
      else if (!strcmp(value, "/admin/conf"))
	in_conf_location = 1;
      else if (!strcmp(value, "/admin/log"))
	in_log_location = 1;
      else if (!strcmp(value, "/"))
	in_root_location = 1;

      cupsFilePrintf(temp, "%s %s>\n", line, value);
    }
    else if (!_cups_strcasecmp(line, "</Location>"))
    {
      in_location = 0;
      indent -= 2;
      if (in_admin_location && remote_admin >= 0)
      {
	wrote_admin_location = 1;

	if (remote_admin)
          cupsFilePuts(temp, "  # Allow remote administration...\n");
	else if (remote_admin == 0)
          cupsFilePuts(temp, "  # Restrict access to the admin pages...\n");

        cupsFilePuts(temp, "  Order allow,deny\n");

	if (remote_admin)
	  cupsFilePrintf(temp, "  Allow %s\n",
	                 remote_any > 0 ? "all" : "@LOCAL");
      }
      else if (in_conf_location && remote_admin >= 0)
      {
	wrote_conf_location = 1;

	if (remote_admin)
          cupsFilePuts(temp, "  # Allow remote access to the configuration "
	                     "files...\n");
	else
          cupsFilePuts(temp, "  # Restrict access to the configuration "
	                     "files...\n");

        cupsFilePuts(temp, "  Order allow,deny\n");

	if (remote_admin)
	  cupsFilePrintf(temp, "  Allow %s\n",
	                 remote_any > 0 ? "all" : "@LOCAL");
      }
      else if (in_log_location && remote_admin >= 0)
      {
	wrote_log_location = 1;

	if (remote_admin)
          cupsFilePuts(temp, "  # Allow remote access to the log "
	                     "files...\n");
	else
          cupsFilePuts(temp, "  # Restrict access to the log "
	                     "files...\n");

        cupsFilePuts(temp, "  Order allow,deny\n");

	if (remote_admin)
	  cupsFilePrintf(temp, "  Allow %s\n",
	                 remote_any > 0 ? "all" : "@LOCAL");
      }
      else if (in_root_location &&
               (remote_admin >= 0 || remote_any >= 0 || share_printers >= 0))
      {
	wrote_root_location = 1;

	if (remote_admin > 0 && share_printers > 0)
          cupsFilePuts(temp, "  # Allow shared printing and remote "
	                     "administration...\n");
	else if (remote_admin > 0)
          cupsFilePuts(temp, "  # Allow remote administration...\n");
	else if (share_printers > 0)
          cupsFilePuts(temp, "  # Allow shared printing...\n");
	else if (remote_any > 0)
          cupsFilePuts(temp, "  # Allow remote access...\n");
	else
          cupsFilePuts(temp, "  # Restrict access to the server...\n");

        cupsFilePuts(temp, "  Order allow,deny\n");

	if (remote_admin > 0 || remote_any > 0 || share_printers > 0)
	  cupsFilePrintf(temp, "  Allow %s\n",
	                 remote_any > 0 ? "all" : "@LOCAL");
      }

      in_admin_location = 0;
      in_conf_location  = 0;
      in_log_location   = 0;
      in_root_location  = 0;

      cupsFilePuts(temp, "</Location>\n");
    }
    else if (!_cups_strcasecmp(line, "<Limit"))
    {
      if (in_default_policy)
      {
       /*
	* See if the policy limit is for the Cancel-Job operation...
	*/

	char	*valptr;		/* Pointer into value */


	if (!_cups_strcasecmp(value, "cancel-job") && user_cancel_any >= 0)
	{
	 /*
	  * Don't write anything for this limit section...
	  */

	  in_cancel_job = 2;
	}
	else
	{
	  cupsFilePrintf(temp, "%*s%s", indent, "", line);

	  while (*value)
	  {
	    for (valptr = value; *valptr && !_cups_isspace(*valptr); valptr ++);

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

	    if (!_cups_strcasecmp(value, "cancel-job") && user_cancel_any >= 0)
	    {
	     /*
	      * Write everything except for this definition...
	      */

	      in_cancel_job = 1;
	    }
	    else
	      cupsFilePrintf(temp, " %s", value);

	    for (value = valptr; _cups_isspace(*value); value ++);
	  }

	  cupsFilePuts(temp, ">\n");
	}
      }
      else
        cupsFilePrintf(temp, "%*s%s %s>\n", indent, "", line, value);

      indent += 2;
    }
    else if (!_cups_strcasecmp(line, "</Limit>") && in_cancel_job)
    {
      indent -= 2;

      if (in_cancel_job == 1)
	cupsFilePuts(temp, "  </Limit>\n");

      wrote_policy = 1;

      if (!user_cancel_any)
	cupsFilePuts(temp, "  # Only the owner or an administrator can cancel "
			   "a job...\n"
			   "  <Limit Cancel-Job>\n"
			   "    Order deny,allow\n"
			   "    Require user @OWNER "
			   CUPS_DEFAULT_PRINTOPERATOR_AUTH "\n"
			   "  </Limit>\n");

      in_cancel_job = 0;
    }
    else if ((((in_admin_location || in_conf_location || in_root_location || in_log_location) &&
               (remote_admin >= 0 || remote_any >= 0)) ||
              (in_root_location && share_printers >= 0)) &&
             (!_cups_strcasecmp(line, "Allow") || !_cups_strcasecmp(line, "Deny") ||
	      !_cups_strcasecmp(line, "Order")))
      continue;
    else if (in_cancel_job == 2)
      continue;
    else if (line[0] == '<')
    {
      if (value)
      {
        cupsFilePrintf(temp, "%*s%s %s>\n", indent, "", line, value);
	indent += 2;
      }
      else
      {
	if (line[1] == '/')
	  indent -= 2;

	cupsFilePrintf(temp, "%*s%s\n", indent, "", line);
      }
    }
    else if (!in_policy && !in_location &&
             (val = cupsGetOption(line, num_settings, settings)) != NULL)
    {
     /*
      * Replace this directive's value with the new one...
      */

      cupsd_num_settings = cupsAddOption(line, val, cupsd_num_settings,
                                         &cupsd_settings);

     /*
      * Write the new value in its place, without indentation since we
      * only support setting root directives, not in sections...
      */

      cupsFilePrintf(temp, "%s %s\n", line, val);
    }
    else if (value)
    {
      if (!in_policy && !in_location)
      {
       /*
        * Record the non-policy, non-location directives that we find
	* in the server settings, since we cache this info and record it
	* in cupsAdminGetServerSettings()...
	*/

	cupsd_num_settings = cupsAddOption(line, value, cupsd_num_settings,
                                           &cupsd_settings);
      }

      cupsFilePrintf(temp, "%*s%s %s\n", indent, "", line, value);
    }
    else
      cupsFilePrintf(temp, "%*s%s\n", indent, "", line);
  }

 /*
  * Write any missing info...
  */

  if (!wrote_browsing && share_printers >= 0)
  {
    if (share_printers > 0)
    {
      cupsFilePuts(temp, "# Share local printers on the local network.\n");
      cupsFilePuts(temp, "Browsing On\n");
    }
    else
    {
      cupsFilePuts(temp, "# Disable printer sharing and shared printers.\n");
      cupsFilePuts(temp, "Browsing Off\n");
    }
  }

  if (!wrote_loglevel && debug_logging >= 0)
  {
    if (debug_logging)
    {
      cupsFilePuts(temp, "# Show troubleshooting information in error_log.\n");
      cupsFilePuts(temp, "LogLevel debug\n");
    }
    else
    {
      cupsFilePuts(temp, "# Show general information in error_log.\n");
      cupsFilePuts(temp, "LogLevel " CUPS_DEFAULT_LOG_LEVEL "\n");
    }
  }

  if (!wrote_port_listen &&
      (remote_admin >= 0 || remote_any >= 0 || share_printers >= 0))
  {
    if (remote_admin > 0 || remote_any > 0 || share_printers > 0)
    {
      cupsFilePuts(temp, "# Allow remote access\n");
      cupsFilePrintf(temp, "Port %d\n", ippPort());
    }
    else
    {
      cupsFilePuts(temp,
                   "# Only listen for connections from the local machine.\n");
      cupsFilePrintf(temp, "Listen localhost:%d\n", ippPort());
    }

#ifdef CUPS_DEFAULT_DOMAINSOCKET
    if (!access(CUPS_DEFAULT_DOMAINSOCKET, 0))
      cupsFilePuts(temp, "Listen " CUPS_DEFAULT_DOMAINSOCKET "\n");
#endif /* CUPS_DEFAULT_DOMAINSOCKET */
  }

  if (!wrote_root_location &&
      (remote_admin >= 0 || remote_any >= 0 || share_printers >= 0))
  {
    if (remote_admin > 0 && share_printers > 0)
      cupsFilePuts(temp,
                   "# Allow shared printing and remote administration...\n");
    else if (remote_admin > 0)
      cupsFilePuts(temp, "# Allow remote administration...\n");
    else if (share_printers > 0)
      cupsFilePuts(temp, "# Allow shared printing...\n");
    else if (remote_any > 0)
      cupsFilePuts(temp, "# Allow remote access...\n");
    else
      cupsFilePuts(temp, "# Restrict access to the server...\n");

    cupsFilePuts(temp, "<Location />\n"
                       "  Order allow,deny\n");

    if (remote_admin > 0 || remote_any > 0 || share_printers > 0)
      cupsFilePrintf(temp, "  Allow %s\n", remote_any > 0 ? "all" : "@LOCAL");

    cupsFilePuts(temp, "</Location>\n");
  }

  if (!wrote_admin_location && remote_admin >= 0)
  {
    if (remote_admin)
      cupsFilePuts(temp, "# Allow remote administration...\n");
    else
      cupsFilePuts(temp, "# Restrict access to the admin pages...\n");

    cupsFilePuts(temp, "<Location /admin>\n"
                       "  Order allow,deny\n");

    if (remote_admin)
      cupsFilePrintf(temp, "  Allow %s\n", remote_any > 0 ? "all" : "@LOCAL");

    cupsFilePuts(temp, "</Location>\n");
  }

  if (!wrote_conf_location && remote_admin >= 0)
  {
    if (remote_admin)
      cupsFilePuts(temp,
                   "# Allow remote access to the configuration files...\n");
    else
      cupsFilePuts(temp, "# Restrict access to the configuration files...\n");

    cupsFilePuts(temp, "<Location /admin/conf>\n"
                       "  AuthType Default\n"
                       "  Require user @SYSTEM\n"
                       "  Order allow,deny\n");

    if (remote_admin)
      cupsFilePrintf(temp, "  Allow %s\n", remote_any > 0 ? "all" : "@LOCAL");

    cupsFilePuts(temp, "</Location>\n");
  }

  if (!wrote_log_location && remote_admin >= 0)
  {
    if (remote_admin)
      cupsFilePuts(temp,
                   "# Allow remote access to the log files...\n");
    else
      cupsFilePuts(temp, "# Restrict access to the log files...\n");

    cupsFilePuts(temp, "<Location /admin/log>\n"
                       "  AuthType Default\n"
                       "  Require user @SYSTEM\n"
                       "  Order allow,deny\n");

    if (remote_admin)
      cupsFilePrintf(temp, "  Allow %s\n", remote_any > 0 ? "all" : "@LOCAL");

    cupsFilePuts(temp, "</Location>\n");
  }

  if (!wrote_policy && user_cancel_any >= 0)
  {
    cupsFilePuts(temp, "<Policy default>\n"
                       "  # Job-related operations must be done by the owner "
		       "or an administrator...\n"
                       "  <Limit Send-Document Send-URI Hold-Job Release-Job "
		       "Restart-Job Purge-Jobs Set-Job-Attributes "
		       "Create-Job-Subscription Renew-Subscription "
		       "Cancel-Subscription Get-Notifications Reprocess-Job "
		       "Cancel-Current-Job Suspend-Current-Job Resume-Job "
		       "CUPS-Move-Job>\n"
                       "    Require user @OWNER @SYSTEM\n"
                       "    Order deny,allow\n"
                       "  </Limit>\n"
                       "  # All administration operations require an "
		       "administrator to authenticate...\n"
		       "  <Limit Pause-Printer Resume-Printer "
                       "Set-Printer-Attributes Enable-Printer "
		       "Disable-Printer Pause-Printer-After-Current-Job "
		       "Hold-New-Jobs Release-Held-New-Jobs Deactivate-Printer "
		       "Activate-Printer Restart-Printer Shutdown-Printer "
		       "Startup-Printer Promote-Job Schedule-Job-After "
		       "CUPS-Add-Printer CUPS-Delete-Printer "
		       "CUPS-Add-Class CUPS-Delete-Class "
		       "CUPS-Accept-Jobs CUPS-Reject-Jobs "
		       "CUPS-Set-Default CUPS-Add-Device CUPS-Delete-Device>\n"
                       "    AuthType Default\n"
		       "    Require user @SYSTEM\n"
                       "    Order deny,allow\n"
                       "</Limit>\n");

    if (!user_cancel_any)
      cupsFilePuts(temp, "  # Only the owner or an administrator can cancel "
                         "a job...\n"
	                 "  <Limit Cancel-Job>\n"
	                 "    Order deny,allow\n"
	                 "    Require user @OWNER "
			 CUPS_DEFAULT_PRINTOPERATOR_AUTH "\n"
			 "  </Limit>\n");

    cupsFilePuts(temp, "  <Limit All>\n"
                       "  Order deny,allow\n"
                       "  </Limit>\n"
		       "</Policy>\n");
  }

  for (i = num_settings, setting = settings; i > 0; i --, setting ++)
    if (setting->name[0] != '_' &&
        _cups_strcasecmp(setting->name, "Listen") &&
	_cups_strcasecmp(setting->name, "Port") &&
        !cupsGetOption(setting->name, cupsd_num_settings, cupsd_settings))
    {
     /*
      * Add this directive to the list of directives we have written...
      */

      cupsd_num_settings = cupsAddOption(setting->name, setting->value,
                                         cupsd_num_settings, &cupsd_settings);

     /*
      * Write the new value, without indentation since we only support
      * setting root directives, not in sections...
      */

      cupsFilePrintf(temp, "%s %s\n", setting->name, setting->value);
    }

  cupsFileClose(cupsd);
  cupsFileClose(temp);

 /*
  * Upload the configuration file to the server...
  */

  status = cupsPutFile(http, "/admin/conf/cupsd.conf", tempfile);

  if (status == HTTP_STATUS_CREATED)
  {
   /*
    * Updated OK, add the basic settings...
    */

    if (debug_logging >= 0)
      cupsd_num_settings = cupsAddOption(CUPS_SERVER_DEBUG_LOGGING,
                                	 debug_logging ? "1" : "0",
					 cupsd_num_settings, &cupsd_settings);
    else
      cupsd_num_settings = cupsAddOption(CUPS_SERVER_DEBUG_LOGGING,
                                	 old_debug_logging ? "1" : "0",
					 cupsd_num_settings, &cupsd_settings);

    if (remote_admin >= 0)
      cupsd_num_settings = cupsAddOption(CUPS_SERVER_REMOTE_ADMIN,
                                	 remote_admin ? "1" : "0",
					 cupsd_num_settings, &cupsd_settings);
    else
      cupsd_num_settings = cupsAddOption(CUPS_SERVER_REMOTE_ADMIN,
                                	 old_remote_admin ? "1" : "0",
					 cupsd_num_settings, &cupsd_settings);

    if (remote_any >= 0)
      cupsd_num_settings = cupsAddOption(CUPS_SERVER_REMOTE_ANY,
					 remote_any ? "1" : "0",
					 cupsd_num_settings, &cupsd_settings);
    else
      cupsd_num_settings = cupsAddOption(CUPS_SERVER_REMOTE_ANY,
					 old_remote_any ? "1" : "0",
					 cupsd_num_settings, &cupsd_settings);

    if (share_printers >= 0)
      cupsd_num_settings = cupsAddOption(CUPS_SERVER_SHARE_PRINTERS,
                                	 share_printers ? "1" : "0",
					 cupsd_num_settings, &cupsd_settings);
    else
      cupsd_num_settings = cupsAddOption(CUPS_SERVER_SHARE_PRINTERS,
                                	 old_share_printers ? "1" : "0",
					 cupsd_num_settings, &cupsd_settings);

    if (user_cancel_any >= 0)
      cupsd_num_settings = cupsAddOption(CUPS_SERVER_USER_CANCEL_ANY,
                                	 user_cancel_any ? "1" : "0",
					 cupsd_num_settings, &cupsd_settings);
    else
      cupsd_num_settings = cupsAddOption(CUPS_SERVER_USER_CANCEL_ANY,
                                	 old_user_cancel_any ? "1" : "0",
					 cupsd_num_settings, &cupsd_settings);

   /*
    * Save the new values...
    */

    invalidate_cupsd_cache(cg);

    cg->cupsd_num_settings = cupsd_num_settings;
    cg->cupsd_settings     = cupsd_settings;
    cg->cupsd_update       = time(NULL);

    httpGetHostname(http, cg->cupsd_hostname, sizeof(cg->cupsd_hostname));
  }
  else
    cupsFreeOptions(cupsd_num_settings, cupsd_settings);

 /*
  * Remote our temp files and return...
  */

  if (remote)
    unlink(cupsdconf);

  unlink(tempfile);

  return (status == HTTP_STATUS_CREATED);
}


/*
 * 'get_cupsd_conf()' - Get the current cupsd.conf file.
 */

static http_status_t			/* O - Status of request */
get_cupsd_conf(
    http_t          *http,		/* I - Connection to server */
    _cups_globals_t *cg,		/* I - Global data */
    time_t          last_update,	/* I - Last update time for file */
    char            *name,		/* I - Filename buffer */
    size_t          namesize,		/* I - Size of filename buffer */
    int             *remote)		/* O - Remote file? */
{
  int		fd;			/* Temporary file descriptor */
#ifndef _WIN32
  struct stat	info;			/* cupsd.conf file information */
#endif /* _WIN32 */
  http_status_t	status;			/* Status of getting cupsd.conf */
  char		host[HTTP_MAX_HOST];	/* Hostname for connection */


 /*
  * See if we already have the data we need...
  */

  httpGetHostname(http, host, sizeof(host));

  if (_cups_strcasecmp(cg->cupsd_hostname, host))
    invalidate_cupsd_cache(cg);

  snprintf(name, namesize, "%s/cupsd.conf", cg->cups_serverroot);
  *remote = 0;

#ifndef _WIN32
  if (!_cups_strcasecmp(host, "localhost") && !access(name, R_OK))
  {
   /*
    * Read the local file rather than using HTTP...
    */

    if (stat(name, &info))
    {
      char	message[1024];		/* Message string */


      snprintf(message, sizeof(message),
               _cupsLangString(cupsLangDefault(), _("stat of %s failed: %s")),
               name, strerror(errno));
      _cupsSetError(IPP_STATUS_ERROR_INTERNAL, message, 0);

      *name = '\0';

      return (HTTP_STATUS_SERVER_ERROR);
    }
    else if (last_update && info.st_mtime <= last_update)
      status = HTTP_STATUS_NOT_MODIFIED;
    else
      status = HTTP_STATUS_OK;
  }
  else
#endif /* !_WIN32 */
  {
   /*
    * Read cupsd.conf via a HTTP GET request...
    */

    if ((fd = cupsTempFd(name, (int)namesize)) < 0)
    {
      *name = '\0';

      _cupsSetError(IPP_STATUS_ERROR_INTERNAL, NULL, 0);

      invalidate_cupsd_cache(cg);

      return (HTTP_STATUS_SERVER_ERROR);
    }

    *remote = 1;

    httpClearFields(http);

    if (last_update)
      httpSetField(http, HTTP_FIELD_IF_MODIFIED_SINCE,
                   httpGetDateString(last_update));

    status = cupsGetFd(http, "/admin/conf/cupsd.conf", fd);

    close(fd);

    if (status != HTTP_STATUS_OK)
    {
      unlink(name);
      *name = '\0';
    }
  }

  return (status);
}


/*
 * 'invalidate_cupsd_cache()' - Invalidate the cached cupsd.conf settings.
 */

static void
invalidate_cupsd_cache(
    _cups_globals_t *cg)		/* I - Global data */
{
  cupsFreeOptions(cg->cupsd_num_settings, cg->cupsd_settings);

  cg->cupsd_hostname[0]  = '\0';
  cg->cupsd_update       = 0;
  cg->cupsd_num_settings = 0;
  cg->cupsd_settings     = NULL;
}