TheBESKeys.cc

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00001 // TheBESKeys.cc
00002 
00003 // This file is part of bes, A C++ back-end server implementation framework
00004 // for the OPeNDAP Data Access Protocol.
00005 
00006 // Copyright (c) 2004,2005 University Corporation for Atmospheric Research
00007 // Author: Patrick West <pwest@ucar.edu> and Jose Garcia <jgarcia@ucar.edu>
00008 //
00009 // This library is free software; you can redistribute it and/or
00010 // modify it under the terms of the GNU Lesser General Public
00011 // License as published by the Free Software Foundation; either
00012 // version 2.1 of the License, or (at your option) any later version.
00013 // 
00014 // This library is distributed in the hope that it will be useful,
00015 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00016 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017 // Lesser General Public License for more details.
00018 // 
00019 // You should have received a copy of the GNU Lesser General Public
00020 // License along with this library; if not, write to the Free Software
00021 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00022 //
00023 // You can contact University Corporation for Atmospheric Research at
00024 // 3080 Center Green Drive, Boulder, CO 80301
00025 
00026 // (c) COPYRIGHT University Corporation for Atmospheric Research 2004-2005
00027 // Please read the full copyright statement in the file COPYRIGHT_UCAR.
00028 //
00029 // Authors:
00030 //      pwest       Patrick West <pwest@ucar.edu>
00031 //      jgarcia     Jose Garcia <jgarcia@ucar.edu>
00032 
00033 #include "sys/stat.h"
00034 #include "TheBESKeys.h"
00035 #include "BESKeysException.h"
00036 #include "config.h"
00037 
00038 #define BES_CONF getenv("BES_CONF")
00039 
00040 BESKeys *TheBESKeys::_instance = 0;
00041 string TheBESKeys::ConfigFile = "";
00042 
00043 BESKeys *TheBESKeys::TheKeys()
00044 {
00045     if (_instance == 0) {
00046         string use_ini = TheBESKeys::ConfigFile;
00047         if (use_ini == "") {
00048             char *ini_file = BES_CONF;
00049             if (!ini_file)
00050             {
00051                 string try_ini = "/usr/local/etc/bes/bes.conf" ;
00052                 struct stat buf;
00053                 int statret = stat( try_ini.c_str(), &buf ) ;
00054                 if ( statret == -1 || !S_ISREG( buf.st_mode ) )
00055                 {
00056                     try_ini = "/etc/bes/bes.conf" ;
00057                     int statret = stat( try_ini.c_str(), &buf ) ;
00058                     if ( statret == -1 || !S_ISREG( buf.st_mode ) )
00059                     {
00060                         try_ini = "/usr/etc/bes/bes.conf" ;
00061                         int statret = stat( try_ini.c_str(), &buf ) ;
00062                         if ( statret == -1 || !S_ISREG( buf.st_mode ) )
00063                         {
00064                             string s = (string)"Unable to locate BES config file. "
00065                                     + "Please either pass -c "
00066                                     + "option when starting the BES, set "
00067                                     + "the environment variable BES_CONF, "
00068                                     + "or install in /usr/local/etc/bes/bes.conf "
00069                                     + "or /etc/bes/bes.conf." ;
00070                             throw BESKeysException(s, __FILE__, __LINE__);
00071                         }
00072                         else
00073                         {
00074                             use_ini = try_ini ;
00075                         }
00076                     }
00077                     else
00078                     {
00079                         use_ini = try_ini ;
00080                     }
00081                 }
00082                 else
00083                 {
00084                     use_ini = try_ini ;
00085                 }
00086             } else {
00087                 use_ini = ini_file;
00088             }
00089         }
00090         _instance = new TheBESKeys(use_ini);
00091     }
00092     return _instance;
00093 }
00094 

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