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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Defines base::PathProviderMac which replaces base::PathProviderPosix for Mac
// in base/path_service.cc.
#include <dlfcn.h>
#import <Foundation/Foundation.h>
#include <mach-o/dyld.h>
#include <stdint.h>
#include "base/base_paths.h"
#include "base/compiler_specific.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/logging.h"
#include "base/mac/foundation_util.h"
#include "base/path_service.h"
#include "base/strings/string_util.h"
#include "build/build_config.h"
namespace {
void GetNSExecutablePath(base::FilePath* path) {
DCHECK(path);
// Executable path can have relative references ("..") depending on
// how the app was launched.
uint32_t executable_length = 0;
_NSGetExecutablePath(NULL, &executable_length);
DCHECK_GT(executable_length, 1u);
std::string executable_path;
int rv = _NSGetExecutablePath(
base::WriteInto(&executable_path, executable_length),
&executable_length);
DCHECK_EQ(rv, 0);
// _NSGetExecutablePath may return paths containing ./ or ../ which makes
// FilePath::DirName() work incorrectly, convert it to absolute path so that
// paths such as DIR_SOURCE_ROOT can work, since we expect absolute paths to
// be returned here.
*path = base::MakeAbsoluteFilePath(base::FilePath(executable_path));
}
// Returns true if the module for |address| is found. |path| will contain
// the path to the module. Note that |path| may not be absolute.
bool GetModulePathForAddress(base::FilePath* path,
const void* address) WARN_UNUSED_RESULT;
bool GetModulePathForAddress(base::FilePath* path, const void* address) {
Dl_info info;
if (dladdr(address, &info) == 0)
return false;
*path = base::FilePath(info.dli_fname);
return true;
}
} // namespace
namespace base {
bool PathProviderMac(int key, base::FilePath* result) {
switch (key) {
case base::FILE_EXE:
GetNSExecutablePath(result);
return true;
case base::FILE_MODULE:
return GetModulePathForAddress(result,
reinterpret_cast<const void*>(&base::PathProviderMac));
case base::DIR_APP_DATA: {
bool success = base::mac::GetUserDirectory(NSApplicationSupportDirectory,
result);
#if defined(OS_IOS)
// On IOS, this directory does not exist unless it is created explicitly.
if (success && !base::PathExists(*result))
success = base::CreateDirectory(*result);
#endif // defined(OS_IOS)
return success;
}
case base::DIR_SOURCE_ROOT:
// Go through PathService to catch overrides.
if (!PathService::Get(base::FILE_EXE, result))
return false;
// Start with the executable's directory.
*result = result->DirName();
#if !defined(OS_IOS)
if (base::mac::AmIBundled()) {
// The bundled app executables (Chromium, TestShell, etc) live five
// levels down, eg:
// src/xcodebuild/{Debug|Release}/Chromium.app/Contents/MacOS/Chromium
*result = result->DirName().DirName().DirName().DirName().DirName();
} else {
// Unit tests execute two levels deep from the source root, eg:
// src/xcodebuild/{Debug|Release}/base_unittests
*result = result->DirName().DirName();
}
#endif
return true;
case base::DIR_USER_DESKTOP:
#if defined(OS_IOS)
// iOS does not have desktop directories.
NOTIMPLEMENTED();
return false;
#else
return base::mac::GetUserDirectory(NSDesktopDirectory, result);
#endif
case base::DIR_CACHE:
return base::mac::GetUserDirectory(NSCachesDirectory, result);
default:
return false;
}
}
} // namespace base
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