scheduler/server.c

   1 /*
   2  * "$Id: server.c 6649 2007-07-11 21:46:42Z mike $"
   3  *
   4  *   Server start/stop routines for the Common UNIX Printing System (CUPS).
   5  *
   6  *   Copyright 2007 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   * Startup all the networking stuff...
  84   */
  85
  86   cupsdStartListening();
  87   cupsdStartBrowsing();
  88   cupsdStartPolling();
  89
  90  /*
  91   * Create a pipe for CGI processes...
  92   */
  93
  94   if (cupsdOpenPipe(CGIPipes))
  95     cupsdLogMessage(CUPSD_LOG_ERROR,
  96                     "cupsdStartServer: Unable to create pipes for CGI status!");
  97   else
  98   {
  99     CGIStatusBuffer = cupsdStatBufNew(CGIPipes[0], "[CGI]");
 100
 101     cupsdAddSelect(CGIPipes[0], (cupsd_selfunc_t)cupsdUpdateCGI, NULL, NULL);
 102   }
 103
 104  /*
 105   * Mark that the server has started and printers and jobs may be changed...
 106   */
 107
 108   LastEvent     = CUPSD_EVENT_PRINTER_CHANGED | CUPSD_EVENT_JOB_STATE_CHANGED |
 109                   CUPSD_EVENT_SERVER_STARTED;
 110
 111   started = 1;
 112 }
 113
 114
 115 /*
 116  * 'cupsdStopServer()' - Stop the server.
 117  */
 118
 119 void
 120 cupsdStopServer(void)
 121 {
 122   if (!started)
 123     return;
 124
 125  /*
 126   * Close all network clients and stop all jobs...
 127   */
 128
 129   cupsdCloseAllClients();
 130   cupsdStopListening();
 131   cupsdStopPolling();
 132   cupsdStopBrowsing();
 133   cupsdStopAllNotifiers();
 134   cupsdSaveRemoteCache();
 135   cupsdDeleteAllCerts();
 136
 137   if (Clients)
 138   {
 139     cupsArrayDelete(Clients);
 140     Clients = NULL;
 141   }
 142
 143  /*
 144   * Close the pipe for CGI processes...
 145   */
 146
 147   if (CGIPipes[0] >= 0)
 148   {
 149     cupsdRemoveSelect(CGIPipes[0]);
 150
 151     cupsdStatBufDelete(CGIStatusBuffer);
 152     close(CGIPipes[1]);
 153
 154     CGIPipes[0] = -1;
 155     CGIPipes[1] = -1;
 156   }
 157
 158  /*
 159   * Close all log files...
 160   */
 161
 162   if (AccessFile != NULL)
 163   {
 164     cupsFileClose(AccessFile);
 165
 166     AccessFile = NULL;
 167   }
 168
 169   if (ErrorFile != NULL)
 170   {
 171     cupsFileClose(ErrorFile);
 172
 173     ErrorFile = NULL;
 174   }
 175
 176   if (PageFile != NULL)
 177   {
 178     cupsFileClose(PageFile);
 179
 180     PageFile = NULL;
 181   }
 182
 183 #ifdef HAVE_NOTIFY_POST
 184  /*
 185   * Send one last notification as the server shuts down.
 186   */
 187
 188   cupsdLogMessage(CUPSD_LOG_DEBUG,
 189                   "notify_post(\"com.apple.printerListChange\") last");
 190   notify_post("com.apple.printerListChange");
 191 #endif /* HAVE_NOTIFY_POST */
 192
 193   started = 0;
 194 }
 195
 196
 197 /*
 198  * End of "$Id: server.c 6649 2007-07-11 21:46:42Z mike $".
 199  */