X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fdynamic.cpp;h=5f69820c9ec84805a1bae24f9f7009c193bc392f;hb=e2b0f3dc9ef4d56c71d7abda13e6139ca092e387;hp=dfc02ac245c444c37e667596d1319e1263e4b919;hpb=6c14fd7ccdecbf596d64e5baa5e4e0c09bfa0f0d;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/dynamic.cpp b/src/dynamic.cpp index dfc02ac24..5f69820c9 100644 --- a/src/dynamic.cpp +++ b/src/dynamic.cpp @@ -1,168 +1,135 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ +/* + * InspIRCd -- Internet Relay Chat Daemon * - * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev. - * E-mail: - * - * - * - * Written by Craig Edwards, Craig McLure, and others. - * This program is free but copyrighted software; see - * the file COPYING for details. + * Copyright (C) 2020 Matt Schatz + * Copyright (C) 2017-2020 Sadie Powell + * Copyright (C) 2014 Attila Molnar + * Copyright (C) 2012 Robby + * Copyright (C) 2012 ChrisTX + * Copyright (C) 2009-2010 Daniel De Graaf + * Copyright (C) 2009 Uli Schlachter + * Copyright (C) 2007 Robin Burchell + * Copyright (C) 2007 Dennis Friis + * Copyright (C) 2003, 2006, 2010 Craig Edwards * - * --------------------------------------------------- + * This file is part of InspIRCd. InspIRCd is free software: you can + * redistribute it and/or modify it under the terms of the GNU General Public + * License as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more + * details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . */ -using namespace std; - -#include "inspircd_config.h" -#include "inspircd_io.h" -#include "globals.h" -#include "dynamic.h" -#ifndef STATIC_LINK -#include -#else -#include "modlist.h" +#include "inspircd.h" +#ifndef _WIN32 +# include #endif -#include "inspstring.h" -#include "helperfuncs.h" -#include -#include -#include - -extern ServerConfig* Config; +/** The extension that dynamic libraries end with. */ +#define DLL_EXTENSION ".so" -DLLManager::DLLManager(char *fname) +DLLManager::DLLManager(const std::string& name) + : lib(NULL) + , libname(name) { -#ifdef STATIC_LINK - this->staticname[0] = '\0'; - log(DEBUG,"Loading core-compiled module '%s'",fname); - for (int j = 0; modsyms[j].name; j++) + static size_t extlen = strlen(DLL_EXTENSION); + if (name.length() <= extlen || name.compare(name.length() - extlen, name.length(), DLL_EXTENSION)) { - 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.assign(name + " is not a module (no " DLL_EXTENSION " extension)"); + return; } - err = "Module is not statically compiled into the ircd"; -#else -#ifdef IS_CYGWIN - // Cygwin behaviour is handled slightly differently - // With the advent of dynamic modules. Because Windows - // wont let you overwrite a file which is currently in - // Use, we can safely attempt to load the module from its - // Current location :) - - h = dlopen(fname, RTLD_NOW ); - err = (char*)dlerror(); +#ifdef _WIN32 + lib = LoadLibraryA(name.c_str()); #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"); - char tmpfile_template[255]; - char buffer[65536]; - snprintf(tmpfile_template, 255, "%s/inspircd_file.so.%d.XXXXXXXXXX",Config->TempDir,getpid()); - int fd = mkstemp(tmpfile_template); - while (!feof(x)) - { - int n = fread(buffer, 1, 65535, x); - if (n) - write(fd,buffer,n); - } - - // Try to open the library now and get any error message. - - h = dlopen(tmpfile_template, RTLD_NOW ); - err = (char*)dlerror(); - close(fd); - // We can delete the tempfile once it's loaded, leaving just the inode. - if (!Config->debugging) - unlink(tmpfile_template); -#endif + lib = dlopen(name.c_str(), RTLD_NOW|RTLD_LOCAL); #endif + + if (!lib) + RetrieveLastError(); } DLLManager::~DLLManager() { -#ifndef STATIC_LINK - // close the library if it isn't null - if (h != 0) - dlclose(h); + if (!lib) + return; + +#ifdef _WIN32 + FreeLibrary(lib); +#else + dlclose(lib); #endif } - - -#ifdef STATIC_LINK - -bool DLLManager::GetSymbol(initfunc* &v, char *sym_name) +Module* DLLManager::CallInit() { - log(DEBUG,"Symbol search..."); - for (int j = 0; modsyms[j].name; j++) + if (!lib) + return NULL; + + const unsigned long* abi = GetSymbol(MODULE_STR_ABI); + if (!abi) { - if (!strcmp(this->staticname,modsyms[j].name)) - { - log(DEBUG,"Loading symbol..."); - v = modsyms[j].value; - err = 0; - return true; - } + err.assign(libname + " is not a module (no ABI symbol)"); + return NULL; + } + else if (*abi != MODULE_ABI) + { + const char* version = GetVersion(); + err.assign(InspIRCd::Format("%s was built against %s (%lu) which is too %s to use with %s (%lu).", + libname.c_str(), version ? version : "an unknown version", *abi, + *abi < MODULE_ABI ? "old" : "new", INSPIRCD_VERSION, MODULE_ABI)); + return NULL; } - err = "Module symbol missing from the core"; - return false; -} -#else + union + { + void* vptr; + Module* (*fptr)(); + }; -bool DLLManager::GetSymbol(void **v, char *sym_name) -{ - // try extract a symbol from the library - // get any error message is there is any - - if(h != 0) + vptr = GetSymbol(MODULE_STR_INIT); + if (!vptr) { - *v = dlsym( h, sym_name ); - err = (char*)dlerror(); - if( err == 0 ) - return true; - else - return false; - } - else - { - return false; + err.assign(libname + " is not a module (no init symbol)"); + return NULL; } -} -#endif + return (*fptr)(); +} -DLLFactoryBase::DLLFactoryBase(char *fname, char *factory) : DLLManager(fname) +void* DLLManager::GetSymbol(const char* name) const { - // try get the factory function if there is no error yet - - factory_func = 0; - - if(LastError() == 0) - { -#ifdef STATIC_LINK - GetSymbol( factory_func, factory ? factory : (char*)"init_module" ); + if (!lib) + return NULL; + +#if defined _WIN32 + return GetProcAddress(lib, name); #else - GetSymbol( (void **)&factory_func, factory ? factory : (char*)"init_module" ); + return dlsym(lib, name); #endif - } } - -DLLFactoryBase::~DLLFactoryBase() +void DLLManager::RetrieveLastError() { +#if defined _WIN32 + char errmsg[500]; + DWORD dwErrorCode = GetLastError(); + if (FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, dwErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)errmsg, _countof(errmsg), NULL) == 0) + sprintf_s(errmsg, _countof(errmsg), "Error code: %u", dwErrorCode); + SetLastError(ERROR_SUCCESS); + err = errmsg; +#else + const char* errmsg = dlerror(); + err = errmsg ? errmsg : "Unknown error"; +#endif + + std::string::size_type p; + while ((p = err.find_last_of("\r\n")) != std::string::npos) + err.erase(p, 1); }