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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
* E-mail:
* <brain@chatspike.net>
* <Craig@chatspike.net>
*
* Written by Craig Edwards, Craig McLure, and others.
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
using namespace std;
#include "inspircd_config.h"
#include "configreader.h"
#include "globals.h"
#include "dynamic.h"
#ifndef STATIC_LINK
#include <dlfcn.h>
#else
#include "modlist.h"
#endif
#include "inspstring.h"
#include "helperfuncs.h"
#include "inspircd.h"
#include <unistd.h>
#include <sys/types.h>
#include <stdio.h>
DLLManager::DLLManager(InspIRCd* ServerInstance, const char *fname)
{
err = NULL;
if (!strstr(fname,".so"))
{
err = "This doesn't look like a module file to me...";
return;
}
#ifdef STATIC_LINK
this->staticname[0] = '\0';
log(DEBUG,"Loading core-compiled module '%s'",fname);
for (int j = 0; modsyms[j].name; j++)
{
log(DEBUG,"Check %s",modsyms[j].name);
if (!strcmp(modsyms[j].name,fname))
{
log(DEBUG,"Found %s",fname);
strlcpy(this->staticname,fname,1020);
err = 0;
return;
}
}
err = "Module is not statically compiled into the ircd";
#else
// Copy the library to a temp location, this makes recompiles
// a little safer if the ircd is running at the time as the
// shared libraries are mmap()ed and not doing this causes
// segfaults.
FILE* x = fopen(fname,"rb");
if (!x)
{
err = strerror(errno);
return;
}
log(DEBUG,"Opened module file %s",fname);
char tmpfile_template[255];
char buffer[65536];
snprintf(tmpfile_template, 255, "%s/inspircd_file.so.%d.XXXXXXXXXX",ServerInstance->Config->TempDir,getpid());
int fd = mkstemp(tmpfile_template);
if (fd == -1)
{
fclose(x);
err = strerror(errno);
return;
}
log(DEBUG,"Copying %s to %s",fname, tmpfile_template);
while (!feof(x))
{
int n = fread(buffer, 1, 65535, x);
if (n)
{
int written = write(fd,buffer,n);
if (written != n)
{
fclose(x);
err = strerror(errno);
return;
}
}
}
log(DEBUG,"Copied entire file.");
// Try to open the library now and get any error message.
if (close(fd) == -1)
err = strerror(errno);
if (fclose(x) == EOF)
err = strerror(errno);
h = dlopen(fname, RTLD_NOW|RTLD_LOCAL);
if (!h)
{
log(DEBUG,"dlerror occured!");
err = (char*)dlerror();
return;
}
log(DEBUG,"Finished loading '%s': %0x",tmpfile_template, h);
// We can delete the tempfile once it's loaded, leaving just the inode.
if (!err && !ServerInstance->Config->debugging)
{
log(DEBUG,"Deleteting %s",tmpfile_template);
if (unlink(tmpfile_template) == -1)
err = strerror(errno);
}
#endif
}
DLLManager::~DLLManager()
{
#ifndef STATIC_LINK
// close the library if it isn't null
if (h)
dlclose(h);
#endif
}
#ifdef STATIC_LINK
bool DLLManager::GetSymbol(initfunc* &v, const char *sym_name)
{
log(DEBUG,"Symbol search...");
for (int j = 0; modsyms[j].name; j++)
{
if (!strcmp(this->staticname,modsyms[j].name))
{
log(DEBUG,"Loading symbol...");
v = modsyms[j].value;
err = 0;
return true;
}
}
err = "Module symbol missing from the core";
return false;
}
#else
bool DLLManager::GetSymbol(void** v, const char* sym_name)
{
// try extract a symbol from the library
// get any error message is there is any
if (h)
{
log(DEBUG,"Found symbol %s", sym_name);
dlerror(); // clear value
*v = dlsym(h, sym_name);
err = (char*)dlerror();
if (!*v || err)
return false;
}
if (err)
{
return false;
}
else
{
return true;
}
}
#endif
DLLFactoryBase::DLLFactoryBase(InspIRCd* Instance, const char* fname, const char* symbol) : DLLManager(Instance, fname)
{
// try get the factory function if there is no error yet
factory_func = 0;
if (!LastError())
{
#ifdef STATIC_LINK
if (!GetSymbol( factory_func, symbol ? symbol : "init_module"))
#else
if (!GetSymbol( (void **)&factory_func, symbol ? symbol : "init_module"))
#endif
{
throw ModuleException("Missing init_module() entrypoint!");
}
}
}
DLLFactoryBase::~DLLFactoryBase()
{
}
|
