scheduler/server.c

   1 /*
   2  * "$Id: server.c 5493 2006-05-05 16:33:57Z mike $"
   3  *
   4  *   Server start/stop routines for the Common UNIX Printing System (CUPS).
   5  *
   6  *   Copyright 1997-2006 by Easy Software Products, all rights reserved.
   7  *
   8  *   These coded instructions, statements, and computer programs are the
   9  *   property of Easy Software Products and are protected by Federal
  10  *   copyright law.  Distribution and use rights are outlined in the file
  11  *   "LICENSE.txt" which should have been included with this file.  If this
  12  *   file is missing or damaged please contact Easy Software Products
  13  *   at:
  14  *
  15  *       Attn: CUPS Licensing Information
  16  *       Easy Software Products
  17  *       44141 Airport View Drive, Suite 204
  18  *       Hollywood, Maryland 20636 USA
  19  *
  20  *       Voice: (301) 373-9600
  21  *       EMail: cups-info@cups.org
  22  *         WWW: http://www.cups.org
  23  *
  24  * Contents:
  25  *
  26  *   cupsdStartServer() - Start the server.
  27  *   cupsdStopServer()  - Stop the server.
  28  */
  29
  30 /*
  31  * Include necessary headers...
  32  */
  33
  34 #include <cups/http-private.h>
  35 #include "cupsd.h"
  36 #include <grp.h>
  37 #ifdef HAVE_NOTIFY_H
  38 #  include <notify.h>
  39 #endif /* HAVE_NOTIFY_H */
  40
  41
  42 /*
  43  * Local globals...
  44  */
  45
  46 static int      started = 0;
  47
  48
  49 /*
  50  * 'cupsdStartServer()' - Start the server.
  51  */
  52
  53 void
  54 cupsdStartServer(void)
  55 {
  56 #ifdef HAVE_LIBSSL
  57   int                   i;              /* Looping var */
  58   struct timeval        curtime;        /* Current time in microseconds */
  59   unsigned char         data[1024];     /* Seed data */
  60 #endif /* HAVE_LIBSSL */
  61
  62
  63 #ifdef HAVE_LIBSSL
  64  /*
  65   * Initialize the encryption libraries...
  66   */
  67
  68   SSL_library_init();
  69   SSL_load_error_strings();
  70
  71  /*
  72   * Using the current time is a dubious random seed, but on some systems
  73   * it is the best we can do (on others, this seed isn't even used...)
  74   */
  75
  76   gettimeofday(&curtime, NULL);
  77   srand(curtime.tv_sec + curtime.tv_usec);
  78
  79   for (i = 0; i < sizeof(data); i ++)
  80     data[i] = rand(); /* Yes, this is a poor source of random data... */
  81
  82   RAND_seed(&data, sizeof(data));
  83 #elif defined(HAVE_GNUTLS)
  84  /*
  85   * Initialize the encryption libraries...
  86   */
  87
  88   gnutls_global_init();
  89 #endif /* HAVE_LIBSSL */
  90
  91  /*
  92   * Startup all the networking stuff...
  93   */
  94
  95   cupsdStartListening();
  96   cupsdStartBrowsing();
  97   cupsdStartPolling();
  98
  99  /*
 100   * Create a pipe for CGI processes...
 101   */
 102
 103   if (cupsdOpenPipe(CGIPipes))
 104     cupsdLogMessage(CUPSD_LOG_ERROR,
 105                     "cupsdStartServer: Unable to create pipes for CGI status!");
 106   else
 107   {
 108     CGIStatusBuffer = cupsdStatBufNew(CGIPipes[0], "[CGI]");
 109
 110     cupsdLogMessage(CUPSD_LOG_DEBUG2,
 111                     "cupsdStartServer: Adding fd %d to InputSet...",
 112                     CGIPipes[0]);
 113     FD_SET(CGIPipes[0], InputSet);
 114   }
 115
 116  /*
 117   * Mark that the server has started and printers and jobs may be changed...
 118   */
 119
 120   LastEvent     = CUPSD_EVENT_PRINTER_CHANGED | CUPSD_EVENT_JOB_STATE_CHANGED |
 121                   CUPSD_EVENT_SERVER_STARTED;
 122
 123   started = 1;
 124 }
 125
 126
 127 /*
 128  * 'cupsdStopServer()' - Stop the server.
 129  */
 130
 131 void
 132 cupsdStopServer(void)
 133 {
 134   if (!started)
 135     return;
 136
 137  /*
 138   * Close all network clients and stop all jobs...
 139   */
 140
 141   cupsdCloseAllClients();
 142   cupsdStopListening();
 143   cupsdStopPolling();
 144   cupsdStopBrowsing();
 145   cupsdStopAllNotifiers();
 146   cupsdSaveRemoteCache();
 147   cupsdDeleteAllCerts();
 148
 149   if (Clients)
 150   {
 151     cupsArrayDelete(Clients);
 152     Clients = NULL;
 153   }
 154
 155  /*
 156   * Close the pipe for CGI processes...
 157   */
 158
 159   if (CGIPipes[0] >= 0)
 160   {
 161     cupsdLogMessage(CUPSD_LOG_DEBUG2,
 162                     "cupsdStopServer: Removing fd %d from InputSet...",
 163                     CGIPipes[0]);
 164
 165     FD_CLR(CGIPipes[0], InputSet);
 166
 167     cupsdStatBufDelete(CGIStatusBuffer);
 168     close(CGIPipes[1]);
 169
 170     CGIPipes[0] = -1;
 171     CGIPipes[1] = -1;
 172   }
 173
 174  /*
 175   * Close all log files...
 176   */
 177
 178   if (AccessFile != NULL)
 179   {
 180     cupsFileClose(AccessFile);
 181
 182     AccessFile = NULL;
 183   }
 184
 185   if (ErrorFile != NULL)
 186   {
 187     cupsFileClose(ErrorFile);
 188
 189     ErrorFile = NULL;
 190   }
 191
 192   if (PageFile != NULL)
 193   {
 194     cupsFileClose(PageFile);
 195
 196     PageFile = NULL;
 197   }
 198
 199 #ifdef HAVE_NOTIFY_POST
 200  /*
 201   * Send one last notification as the server shuts down.
 202   */
 203
 204   cupsdLogMessage(CUPSD_LOG_DEBUG,
 205                   "notify_post(\"com.apple.printerListChange\") last");
 206   notify_post("com.apple.printerListChange");
 207 #endif /* HAVE_NOTIFY_POST */
 208
 209   started = 0;
 210 }
 211
 212
 213 /*
 214  * End of "$Id: server.c 5493 2006-05-05 16:33:57Z mike $".
 215  */