scheduler/server.c

   1 /*
   2  * "$Id: server.c 7468 2008-04-18 18:31:59Z mike $"
   3  *
   4  *   Server start/stop routines for the Common UNIX Printing System (CUPS).
   5  *
   6  *   Copyright 2007-2008 by Apple Inc.
   7  *   Copyright 1997-2006 by Easy Software Products, all rights reserved.
   8  *
   9  *   These coded instructions, statements, and computer programs are the
  10  *   property of Apple Inc. and are protected by Federal copyright
  11  *   law.  Distribution and use rights are outlined in the file "LICENSE.txt"
  12  *   which should have been included with this file.  If this file is
  13  *   file is missing or damaged, see the license at "http://www.cups.org/".
  14  *
  15  * Contents:
  16  *
  17  *   cupsdStartServer() - Start the server.
  18  *   cupsdStopServer()  - Stop the server.
  19  */
  20
  21 /*
  22  * Include necessary headers...
  23  */
  24
  25 #include <cups/http-private.h>
  26 #include "cupsd.h"
  27 #include <grp.h>
  28 #ifdef HAVE_NOTIFY_H
  29 #  include <notify.h>
  30 #endif /* HAVE_NOTIFY_H */
  31
  32
  33 /*
  34  * Local globals...
  35  */
  36
  37 static int      started = 0;
  38
  39
  40 /*
  41  * 'cupsdStartServer()' - Start the server.
  42  */
  43
  44 void
  45 cupsdStartServer(void)
  46 {
  47 #ifdef HAVE_LIBSSL
  48   int                   i;              /* Looping var */
  49   struct timeval        curtime;        /* Current time in microseconds */
  50   unsigned char         data[1024];     /* Seed data */
  51 #endif /* HAVE_LIBSSL */
  52
  53
  54 #ifdef HAVE_LIBSSL
  55  /*
  56   * Initialize the encryption libraries...
  57   */
  58
  59   SSL_library_init();
  60   SSL_load_error_strings();
  61
  62  /*
  63   * Using the current time is a dubious random seed, but on some systems
  64   * it is the best we can do (on others, this seed isn't even used...)
  65   */
  66
  67   gettimeofday(&curtime, NULL);
  68   srand(curtime.tv_sec + curtime.tv_usec);
  69
  70   for (i = 0; i < sizeof(data); i ++)
  71     data[i] = rand(); /* Yes, this is a poor source of random data... */
  72
  73   RAND_seed(&data, sizeof(data));
  74 #elif defined(HAVE_GNUTLS)
  75  /*
  76   * Initialize the encryption libraries...
  77   */
  78
  79   gnutls_global_init();
  80 #endif /* HAVE_LIBSSL */
  81
  82  /*
  83   * Create the default security profile...
  84   */
  85
  86   DefaultProfile = cupsdCreateProfile(0);
  87
  88  /*
  89   * Startup all the networking stuff...
  90   */
  91
  92   cupsdStartListening();
  93   cupsdStartBrowsing();
  94   cupsdStartPolling();
  95
  96  /*
  97   * Create a pipe for CGI processes...
  98   */
  99
 100   if (cupsdOpenPipe(CGIPipes))
 101     cupsdLogMessage(CUPSD_LOG_ERROR,
 102                     "cupsdStartServer: Unable to create pipes for CGI status!");
 103   else
 104   {
 105     CGIStatusBuffer = cupsdStatBufNew(CGIPipes[0], "[CGI]");
 106
 107     cupsdAddSelect(CGIPipes[0], (cupsd_selfunc_t)cupsdUpdateCGI, NULL, NULL);
 108   }
 109
 110  /*
 111   * Mark that the server has started and printers and jobs may be changed...
 112   */
 113
 114   LastEvent     = CUPSD_EVENT_PRINTER_CHANGED | CUPSD_EVENT_JOB_STATE_CHANGED |
 115                   CUPSD_EVENT_SERVER_STARTED;
 116
 117   started = 1;
 118 }
 119
 120
 121 /*
 122  * 'cupsdStopServer()' - Stop the server.
 123  */
 124
 125 void
 126 cupsdStopServer(void)
 127 {
 128   if (!started)
 129     return;
 130
 131  /*
 132   * Close all network clients and stop all jobs...
 133   */
 134
 135   cupsdCloseAllClients();
 136   cupsdStopListening();
 137   cupsdStopPolling();
 138   cupsdStopBrowsing();
 139   cupsdStopAllNotifiers();
 140   cupsdDeleteAllCerts();
 141
 142   if (Clients)
 143   {
 144     cupsArrayDelete(Clients);
 145     Clients = NULL;
 146   }
 147
 148  /*
 149   * Close the pipe for CGI processes...
 150   */
 151
 152   if (CGIPipes[0] >= 0)
 153   {
 154     cupsdRemoveSelect(CGIPipes[0]);
 155
 156     cupsdStatBufDelete(CGIStatusBuffer);
 157     close(CGIPipes[1]);
 158
 159     CGIPipes[0] = -1;
 160     CGIPipes[1] = -1;
 161   }
 162
 163 #ifdef HAVE_NOTIFY_POST
 164  /*
 165   * Send one last notification as the server shuts down.
 166   */
 167
 168   cupsdLogMessage(CUPSD_LOG_DEBUG,
 169                   "notify_post(\"com.apple.printerListChange\") last");
 170   notify_post("com.apple.printerListChange");
 171 #endif /* HAVE_NOTIFY_POST */
 172
 173  /*
 174   * Close all log files...
 175   */
 176
 177   if (AccessFile != NULL)
 178   {
 179     cupsFileClose(AccessFile);
 180
 181     AccessFile = NULL;
 182   }
 183
 184   if (ErrorFile != NULL)
 185   {
 186     cupsFileClose(ErrorFile);
 187
 188     ErrorFile = NULL;
 189   }
 190
 191   if (PageFile != NULL)
 192   {
 193     cupsFileClose(PageFile);
 194
 195     PageFile = NULL;
 196   }
 197
 198  /*
 199   * Delete the default security profile...
 200   */
 201
 202   cupsdDestroyProfile(DefaultProfile);
 203   DefaultProfile = NULL;
 204
 205  /*
 206   * Write out any dirty files...
 207   */
 208
 209   if (DirtyFiles)
 210     cupsdCleanDirty();
 211
 212   started = 0;
 213 }
 214
 215
 216 /*
 217  * End of "$Id: server.c 7468 2008-04-18 18:31:59Z mike $".
 218  */