src/dynamic.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "configreader.h"
  15 #include "dynamic.h"
  16 #ifndef WIN32
  17 #include <dlfcn.h>
  18 #endif
  19
  20 #include "inspircd.h"
  21
  22 DLLManager::DLLManager(InspIRCd* ServerInstance, const char *fname)
  23 {
  24         err = NULL;
  25
  26         if (!strstr(fname,".so"))
  27         {
  28                 err = "This doesn't look like a module file to me...";
  29                 return;
  30         }
  31
  32         h = dlopen(fname, RTLD_NOW|RTLD_LOCAL);
  33         if (!h)
  34         {
  35                 err = (char*)dlerror();
  36                 return;
  37         }
  38 }
  39
  40 DLLManager::~DLLManager()
  41 {
  42         // close the library if it isn't null
  43         if (h)
  44                 dlclose(h);
  45 }
  46
  47
  48
  49 bool DLLManager::GetSymbol(void** v, const char* sym_name)
  50 {
  51         // try extract a symbol from the library
  52         // get any error message is there is any
  53
  54         if (h)
  55         {
  56                 dlerror(); // clear value
  57                 *v = dlsym(h, sym_name);
  58                 err = (char*)dlerror();
  59                 if (!*v || err)
  60                         return false;
  61         }
  62
  63         if (err)
  64         {
  65                 return false;
  66         }
  67         else
  68         {
  69                 return true;
  70         }
  71 }
  72
  73 DLLFactoryBase::DLLFactoryBase(InspIRCd* Instance, const char* fname, const char* symbol) : DLLManager(Instance, fname)
  74 {
  75         // try get the factory function if there is no error yet
  76         factory_func = 0;
  77
  78         if (!LastError())
  79         {
  80                 if (!GetSymbol( (void **)&factory_func, symbol ? symbol : "init_module"))
  81                 {
  82                         throw ModuleException("Missing init_module() entrypoint!");
  83                 }
  84         }
  85 }
  86
  87 DLLFactoryBase::~DLLFactoryBase()
  88 {
  89 }
  90