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 "TheBESKeys.h"
00034 #include "BESInternalFatalError.h"
00035 #include "config.h"
00036 
00037 #include <sys/stat.h>
00038 #include <cstdlib>
00039 
00040 #define BES_CONF getenv("BES_CONF")
00041 
00042 BESKeys *TheBESKeys::_instance = 0;
00043 string TheBESKeys::ConfigFile = "";
00044 
00045 BESKeys *TheBESKeys::TheKeys()
00046 {
00047     if (_instance == 0) {
00048         string use_ini = TheBESKeys::ConfigFile;
00049         if (use_ini == "") {
00050             char *ini_file = BES_CONF;
00051             if (!ini_file)
00052             {
00053                 string try_ini = "/usr/local/etc/bes/bes.conf" ;
00054                 struct stat buf;
00055                 int statret = stat( try_ini.c_str(), &buf ) ;
00056                 if ( statret == -1 || !S_ISREG( buf.st_mode ) )
00057                 {
00058                     try_ini = "/etc/bes/bes.conf" ;
00059                     int statret = stat( try_ini.c_str(), &buf ) ;
00060                     if ( statret == -1 || !S_ISREG( buf.st_mode ) )
00061                     {
00062                         try_ini = "/usr/etc/bes/bes.conf" ;
00063                         int statret = stat( try_ini.c_str(), &buf ) ;
00064                         if ( statret == -1 || !S_ISREG( buf.st_mode ) )
00065                         {
00066                             string s = (string)"Unable to locate BES config file. "
00067                                     + "Please either pass -c "
00068                                     + "option when starting the BES, set "
00069                                     + "the environment variable BES_CONF, "
00070                                     + "or install in /usr/local/etc/bes/bes.conf "
00071                                     + "or /etc/bes/bes.conf." ;
00072                             throw BESInternalFatalError(s, __FILE__, __LINE__);
00073                         }
00074                         else
00075                         {
00076                             use_ini = try_ini ;
00077                         }
00078                     }
00079                     else
00080                     {
00081                         use_ini = try_ini ;
00082                     }
00083                 }
00084                 else
00085                 {
00086                     use_ini = try_ini ;
00087                 }
00088             } else {
00089                 use_ini = ini_file;
00090             }
00091         }
00092         _instance = new TheBESKeys(use_ini);
00093     }
00094     return _instance;
00095 }
00096 

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