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https://github.com/FEX-Emu/FEX.git
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Ryan Houdek
3b5d0e3e27
In preparation for seccomp execve inheritance where we need to extract
another FD from a different environment variable.
- Small function to extract the FD and also unset the environment
variable in the same place.
- Keeping the fetch and unset together instead of spreading to
another location in the source.
- Extract the FD upfront instead of passing the string_view around,
since we are unsetting the environment variable at the same place.
Future seccomp inheritance will get the FD just after the FEXFD
- `int FEXSeccompFD {GetFEXFDFromEnv("FEX_SECCOMPFD")};`
89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
// SPDX-License-Identifier: MIT
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#pragma once
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#include <FEXCore/Config/Config.h>
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#include <FEXCore/fextl/string.h>
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/**
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* @brief This is a singleton for storing global configuration state
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*/
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namespace FEX::Config {
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class EmptyMapper : public FEXCore::Config::Layer {
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public:
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explicit EmptyMapper()
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: FEXCore::Config::Layer(FEXCore::Config::LayerType::LAYER_MAIN) {}
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void Load() override {}
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protected:
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};
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void SaveLayerToJSON(const fextl::string& Filename, FEXCore::Config::Layer* const Layer);
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struct ApplicationNames {
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// This is the full path to the program (if it exists).
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fextl::string ProgramPath;
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// This is the program executable name (if it exists).
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fextl::string ProgramName;
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};
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/**
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* @brief Loads the FEX and application configurations for the application that is getting ready to run.
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*
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* @param NoFEXArguments Do we want to parse FEXLoader arguments, Or is this FEXInterpreter?
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* @param LoadProgramConfig Do we want to load application specific configurations?
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* @param argc The `argc` passed to main(...)
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* @param argv The `argv` passed to main(...)
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* @param envp The `envp` passed to main(...)
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* @param ExecFDInterp If FEX was executed with binfmt_misc FD argument
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* @param ProgramFDFromEnv The execveat FD argument passed through FEX
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*
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* @return The application name and path structure
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*/
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ApplicationNames
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LoadConfig(bool NoFEXArguments, bool LoadProgramConfig, int argc, char** argv, char** const envp, bool ExecFDInterp, int ProgramFDFromEnv);
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const char* GetHomeDirectory();
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fextl::string GetDataDirectory();
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fextl::string GetConfigDirectory(bool Global);
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fextl::string GetConfigFileLocation(bool Global);
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void InitializeConfigs();
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/**
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* @brief Loads the global FEX config
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*
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* @return unique_ptr for that layer
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*/
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fextl::unique_ptr<FEXCore::Config::Layer> CreateGlobalMainLayer();
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/**
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* @brief Loads the main application config
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*
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* @param File Optional override to load a specific config file in to the main layer
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* Shouldn't be commonly used
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*
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* @return unique_ptr for that layer
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*/
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fextl::unique_ptr<FEXCore::Config::Layer> CreateMainLayer(const fextl::string* File = nullptr);
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fextl::unique_ptr<FEXCore::Config::Layer> CreateUserOverrideLayer(const char* AppConfig);
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/**
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* @brief Create an application configuration loader
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*
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* @param Filename Application filename component
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* @param Global Load the global configuration or user accessible file
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*
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* @return unique_ptr for that layer
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*/
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fextl::unique_ptr<FEXCore::Config::Layer> CreateAppLayer(const fextl::string& Filename, FEXCore::Config::LayerType Type);
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/**
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* @brief iCreate an environment configuration loader
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*
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* @param _envp[] The environment array from main
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*
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* @return unique_ptr for that layer
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*/
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fextl::unique_ptr<FEXCore::Config::Layer> CreateEnvironmentLayer(char* const _envp[]);
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} // namespace FEX::Config
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