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 #include <dlfcn.h>
  17 #include "inspircd.h"
  18
  19 DLLManager::DLLManager(InspIRCd* ServerInstance, const char *fname)
  20 {
  21         err = NULL;
  22
  23         if (!strstr(fname,".so"))
  24         {
  25                 err = "This doesn't look like a module file to me...";
  26                 return;
  27         }
  28
  29         h = dlopen(fname, RTLD_NOW|RTLD_LOCAL);
  30         if (!h)
  31         {
  32                 err = (char*)dlerror();
  33                 return;
  34         }
  35 }
  36
  37 DLLManager::~DLLManager()
  38 {
  39         // close the library if it isn't null
  40         if (h)
  41                 dlclose(h);
  42 }
  43
  44
  45
  46 bool DLLManager::GetSymbol(void** v, const char* sym_name)
  47 {
  48         // try extract a symbol from the library
  49         // get any error message is there is any
  50
  51         if (h)
  52         {
  53                 dlerror(); // clear value
  54                 *v = dlsym(h, sym_name);
  55                 err = (char*)dlerror();
  56                 if (!*v || err)
  57                         return false;
  58         }
  59
  60         if (err)
  61         {
  62                 return false;
  63         }
  64         else
  65         {
  66                 return true;
  67         }
  68 }
  69
  70 DLLFactoryBase::DLLFactoryBase(InspIRCd* Instance, const char* fname, const char* symbol) : DLLManager(Instance, fname)
  71 {
  72         // try get the factory function if there is no error yet
  73         factory_func = 0;
  74
  75         if (!LastError())
  76         {
  77                 if (!GetSymbol( (void **)&factory_func, symbol ? symbol : "init_module"))
  78                 {
  79                         throw ModuleException("Missing init_module() entrypoint!");
  80                 }
  81         }
  82 }
  83
  84 DLLFactoryBase::~DLLFactoryBase()
  85 {
  86 }
  87