blob: ed47ff0595e23662a2c637c4559015ca627d4c82 [file] [log] [blame]
//
// Copyright 2018 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// system_utils_posix.cpp: Implementation of POSIX OS-specific functions.
#include "system_utils.h"
#include <array>
#include <dlfcn.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
namespace angle
{
Optional<std::string> GetCWD()
{
std::array<char, 4096> pathBuf;
char *result = getcwd(pathBuf.data(), pathBuf.size());
if (result == nullptr)
{
return Optional<std::string>::Invalid();
}
return std::string(pathBuf.data());
}
bool SetCWD(const char *dirName)
{
return (chdir(dirName) == 0);
}
bool UnsetEnvironmentVar(const char *variableName)
{
return (unsetenv(variableName) == 0);
}
bool SetEnvironmentVar(const char *variableName, const char *value)
{
return (setenv(variableName, value, 1) == 0);
}
std::string GetEnvironmentVar(const char *variableName)
{
const char *value = getenv(variableName);
return (value == nullptr ? std::string() : std::string(value));
}
const char *GetPathSeparatorForEnvironmentVar()
{
return ":";
}
class PosixLibrary : public Library
{
public:
PosixLibrary(const char *libraryName, SearchType searchType)
{
std::string directory;
if (searchType == SearchType::ApplicationDir)
{
static int dummySymbol = 0;
Dl_info dlInfo;
if (dladdr(&dummySymbol, &dlInfo) != 0)
{
std::string moduleName = dlInfo.dli_fname;
directory = moduleName.substr(0, moduleName.find_last_of('/') + 1);
}
}
std::string fullPath = directory + libraryName + "." + GetSharedLibraryExtension();
mModule = dlopen(fullPath.c_str(), RTLD_NOW);
}
~PosixLibrary() override
{
if (mModule)
{
dlclose(mModule);
}
}
void *getSymbol(const char *symbolName) override
{
if (!mModule)
{
return nullptr;
}
return dlsym(mModule, symbolName);
}
void *getNative() const override { return mModule; }
private:
void *mModule = nullptr;
};
Library *OpenSharedLibrary(const char *libraryName, SearchType searchType)
{
return new PosixLibrary(libraryName, searchType);
}
bool IsDirectory(const char *filename)
{
struct stat st;
int result = stat(filename, &st);
return result == 0 && ((st.st_mode & S_IFDIR) == S_IFDIR);
}
bool IsDebuggerAttached()
{
// This could have a fuller implementation.
// See https://cs.chromium.org/chromium/src/base/debug/debugger_posix.cc
return false;
}
void BreakDebugger()
{
// This could have a fuller implementation.
// See https://cs.chromium.org/chromium/src/base/debug/debugger_posix.cc
abort();
}
const char *GetExecutableExtension()
{
return "";
}
char GetPathSeparator()
{
return '/';
}
} // namespace angle