mirror of
https://github.com/FirebirdSQL/firebird.git
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148 lines
3.6 KiB
C++
148 lines
3.6 KiB
C++
/*
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* PROGRAM: Client/Server Common Code
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* MODULE: config_root.h
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* DESCRIPTION: Configuration manager (platform specific)
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*
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* The contents of this file are subject to the Interbase Public
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* License Version 1.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy
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* of the License at http://www.Inprise.com/IPL.html
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*
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* Software distributed under the License is distributed on an
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* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
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* or implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code was created by Inprise Corporation
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* and its predecessors. Portions created by Inprise Corporation are
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* Copyright (C) Inprise Corporation.
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*
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* Created by: Dmitry Yemanov <yemanov@yandex.ru>
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*
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* All Rights Reserved.
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* Contributor(s): ______________________________________.
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*/
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#ifndef CONFIG_ROOT_H
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#define CONFIG_ROOT_H
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#include "fb_types.h"
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#include "../common/classes/init.h"
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#include "../common/classes/fb_string.h"
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#include "../common/config/config.h"
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#include "../jrd/os/path_utils.h"
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#include "../common/utils_proto.h"
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static const char* CONFIG_FILE = "firebird.conf";
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/**
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Since the original (isc.cpp) code wasn't able to provide powerful and
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easy-to-use abilities to work with complex configurations, a decision
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has been made to create a completely new one.
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This class is used to determine root directory of the installation and
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to get a pathname for the main configuration file. You may ask what's
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treated as root directory. The implementation of this class uses the
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following algorithm (located in getRootDirectory() member function):
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1. Retrieve full path of the running executable.
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2. If we're either client library or embedded server, return this path.
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3. Otherwise, return parent directory of this path.
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Pathname of the configuration file is platform-specific and defined by
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getConfigFilePath() member function.
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**/
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class ConfigRoot : public Firebird::PermanentStorage
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{
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// config_file works with OS case-sensitivity
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typedef Firebird::PathName string;
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private:
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void GetRoot()
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{
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const Firebird::PathName* clRoot = Config::getCommandLineRootDirectory();
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if (clRoot) {
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root_dir = *clRoot;
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addSlash();
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return;
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}
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#ifdef DEV_BUILD
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if (getRootFromEnvironment("FIREBIRD_DEV")) {
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return;
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}
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#endif
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if (getRootFromEnvironment("FIREBIRD")) {
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return;
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}
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osConfigRoot();
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}
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public:
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explicit ConfigRoot(MemoryPool& p) : PermanentStorage(p),
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root_dir(getPool()), config_file(getPool())
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{
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GetRoot();
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config_file = root_dir + string(CONFIG_FILE);
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}
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virtual ~ConfigRoot() {}
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const char* getInstallDirectory()
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{
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osConfigRoot();
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return install_dir().c_str();
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}
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static void setInstallDirectory(const char* dir)
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{
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fb_assert(!initialized);
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install_dir() = dir;
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initialized = true;
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}
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const char *getRootDirectory() const
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{
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return root_dir.c_str();
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}
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protected:
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const char *getConfigFilePath() const
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{
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return config_file.c_str();
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}
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private:
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static bool initialized;
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static Firebird::InitInstance<string> install_dir;
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string root_dir, config_file;
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void addSlash()
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{
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if (root_dir.rfind(PathUtils::dir_sep) != root_dir.length() - 1)
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{
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root_dir += PathUtils::dir_sep;
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}
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}
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bool getRootFromEnvironment(const char* envName)
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{
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string envValue;
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if (!fb_utils::readenv(envName, envValue))
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return false;
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root_dir = envValue;
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addSlash();
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return true;
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}
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void osConfigRoot();
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// copy prohibition
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ConfigRoot(const ConfigRoot&);
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void operator=(const ConfigRoot&);
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};
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#endif // CONFIG_ROOT_H
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