scheduler/server.c

   1 /*
   2  * "$Id: server.c 6123 2006-11-21 15:36:04Z 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     cupsdAddSelect(CGIPipes[0], (cupsd_selfunc_t)cupsdUpdateCGI, NULL, NULL);
 111   }
 112
 113  /*
 114   * Mark that the server has started and printers and jobs may be changed...
 115   */
 116
 117   LastEvent     = CUPSD_EVENT_PRINTER_CHANGED | CUPSD_EVENT_JOB_STATE_CHANGED |
 118                   CUPSD_EVENT_SERVER_STARTED;
 119
 120   started = 1;
 121 }
 122
 123
 124 /*
 125  * 'cupsdStopServer()' - Stop the server.
 126  */
 127
 128 void
 129 cupsdStopServer(void)
 130 {
 131   if (!started)
 132     return;
 133
 134  /*
 135   * Close all network clients and stop all jobs...
 136   */
 137
 138   cupsdCloseAllClients();
 139   cupsdStopListening();
 140   cupsdStopPolling();
 141   cupsdStopBrowsing();
 142   cupsdStopAllNotifiers();
 143   cupsdSaveRemoteCache();
 144   cupsdDeleteAllCerts();
 145
 146   if (Clients)
 147   {
 148     cupsArrayDelete(Clients);
 149     Clients = NULL;
 150   }
 151
 152  /*
 153   * Close the pipe for CGI processes...
 154   */
 155
 156   if (CGIPipes[0] >= 0)
 157   {
 158     cupsdRemoveSelect(CGIPipes[0]);
 159
 160     cupsdStatBufDelete(CGIStatusBuffer);
 161     close(CGIPipes[1]);
 162
 163     CGIPipes[0] = -1;
 164     CGIPipes[1] = -1;
 165   }
 166
 167  /*
 168   * Close all log files...
 169   */
 170
 171   if (AccessFile != NULL)
 172   {
 173     cupsFileClose(AccessFile);
 174
 175     AccessFile = NULL;
 176   }
 177
 178   if (ErrorFile != NULL)
 179   {
 180     cupsFileClose(ErrorFile);
 181
 182     ErrorFile = NULL;
 183   }
 184
 185   if (PageFile != NULL)
 186   {
 187     cupsFileClose(PageFile);
 188
 189     PageFile = NULL;
 190   }
 191
 192 #ifdef HAVE_NOTIFY_POST
 193  /*
 194   * Send one last notification as the server shuts down.
 195   */
 196
 197   cupsdLogMessage(CUPSD_LOG_DEBUG,
 198                   "notify_post(\"com.apple.printerListChange\") last");
 199   notify_post("com.apple.printerListChange");
 200 #endif /* HAVE_NOTIFY_POST */
 201
 202   started = 0;
 203 }
 204
 205
 206 /*
 207  * End of "$Id: server.c 6123 2006-11-21 15:36:04Z mike $".
 208  */