scheduler/server.c

   1 /*
   2  * "$Id: server.c,v 1.2 2001/03/28 16:55:56 mike Exp $"
   3  *
   4  *   Server start/stop routines for the Common UNIX Printing System (CUPS).
   5  *
   6  *   Copyright 1997-2001 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 20636-3111 USA
  19  *
  20  *       Voice: (301) 373-9603
  21  *       EMail: cups-info@cups.org
  22  *         WWW: http://www.cups.org
  23  *
  24  * Contents:
  25  *
  26  *   StartServer() - Start the server.
  27  *   StopServer()  - Stop the server.
  28  */
  29
  30 /*
  31  * Include necessary headers...
  32  */
  33
  34 #include "cupsd.h"
  35
  36 #include <grp.h>
  37
  38 #ifdef HAVE_LIBSSL
  39 #  include <openssl/ssl.h>
  40 #  include <openssl/rand.h>
  41 #endif /* HAVE_LIBSSL */
  42
  43
  44 /*
  45  * 'StartServer()' - Start the server.
  46  */
  47
  48 void
  49 StartServer(void)
  50 {
  51 #ifdef HAVE_LIBSSL
  52   int           i;              /* Looping var */
  53   struct timeval curtime;       /* Current time in microseconds */
  54   unsigned char data[1024];     /* Seed data */
  55 #endif /* HAVE_LIBSSL */
  56
  57
  58 #ifdef HAVE_LIBSSL
  59  /*
  60   * Initialize the encryption libraries...
  61   */
  62
  63   SSL_library_init();
  64   SSL_load_error_strings();
  65
  66  /*
  67   * Using the current time is a dubious random seed, but on some systems
  68   * it is the best we can do (on others, this seed isn't even used...)
  69   */
  70
  71   gettimeofday(&curtime, NULL);
  72   srand(curtime.tv_sec + curtime.tv_usec);
  73
  74   for (i = 0; i < sizeof(data); i ++)
  75     data[i] = rand(); /* Yes, this is a poor source of random data... */
  76
  77   RAND_seed(&data, sizeof(data));
  78 #endif /* HAVE_LIBSSL */
  79
  80  /*
  81   * Startup all the networking stuff...
  82   */
  83
  84   StartListening();
  85   StartBrowsing();
  86   StartPolling();
  87
  88  /*
  89   * If the administrator has configured the server to run as an unpriviledged
  90   * user, change to that user now...
  91   */
  92
  93   if (RunAsUser)
  94   {
  95     setgid(Group);
  96     setgroups(0, NULL);
  97     setuid(User);
  98   }
  99 }
 100
 101
 102 /*
 103  * 'StopServer()' - Stop the server.
 104  */
 105
 106 void
 107 StopServer(void)
 108 {
 109  /*
 110   * Close all network clients and stop all jobs...
 111   */
 112
 113   CloseAllClients();
 114   StopListening();
 115   StopPolling();
 116   StopBrowsing();
 117
 118   if (Clients != NULL)
 119   {
 120     free(Clients);
 121     Clients = NULL;
 122   }
 123
 124   StopAllJobs();
 125
 126  /*
 127   * Close all log files...
 128   */
 129
 130   if (AccessFile != NULL)
 131   {
 132     fclose(AccessFile);
 133
 134     AccessFile = NULL;
 135   }
 136
 137   if (ErrorFile != NULL)
 138   {
 139     fclose(ErrorFile);
 140
 141     ErrorFile = NULL;
 142   }
 143
 144   if (PageFile != NULL)
 145   {
 146     fclose(PageFile);
 147
 148     PageFile = NULL;
 149   }
 150
 151  /*
 152   * Clear the input and output sets...
 153   */
 154
 155   FD_ZERO(&InputSet);
 156   FD_ZERO(&OutputSet);
 157 }
 158
 159
 160 /*
 161  * End of "$Id: server.c,v 1.2 2001/03/28 16:55:56 mike Exp $".
 162  */