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// Copyright (c) 2010 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.
// This is really Posix minus Mac. Mac code is in base_paths_mac.mm.
#include "base/base_paths.h"
#include <unistd.h>
#include "base/env_var.h"
#include "base/file_path.h"
#include "base/file_util.h"
#include "base/logging.h"
#include "base/path_service.h"
#include "base/scoped_ptr.h"
#include "base/sys_string_conversions.h"
#include "base/xdg_util.h"
namespace base {
#if defined(OS_LINUX)
const char kSelfExe[] = "/proc/self/exe";
#elif defined(OS_SOLARIS)
const char kSelfExe[] = getexecname();
#elif defined(OS_FREEBSD)
const char kSelfExe[] = "/proc/curproc/file";
#endif
bool PathProviderPosix(int key, FilePath* result) {
FilePath path;
switch (key) {
case base::FILE_EXE:
case base::FILE_MODULE: { // TODO(evanm): is this correct?
char bin_dir[PATH_MAX + 1];
int bin_dir_size = readlink(kSelfExe, bin_dir, PATH_MAX);
if (bin_dir_size < 0 || bin_dir_size > PATH_MAX) {
NOTREACHED() << "Unable to resolve " << kSelfExe << ".";
return false;
}
bin_dir[bin_dir_size] = 0;
*result = FilePath(bin_dir);
return true;
}
case base::DIR_SOURCE_ROOT: {
// Allow passing this in the environment, for more flexibility in build
// tree configurations (sub-project builds, gyp --output_dir, etc.)
scoped_ptr<base::EnvVarGetter> env(base::EnvVarGetter::Create());
std::string cr_source_root;
if (env->GetEnv("CR_SOURCE_ROOT", &cr_source_root)) {
path = FilePath(cr_source_root);
if (file_util::PathExists(path.Append("base/base_paths_posix.cc"))) {
*result = path;
return true;
} else {
LOG(WARNING) << "CR_SOURCE_ROOT is set, but it appears to not "
<< "point to the correct source root directory.";
}
}
// On POSIX, unit tests execute two levels deep from the source root.
// For example: sconsbuild/{Debug|Release}/net_unittest
if (PathService::Get(base::DIR_EXE, &path)) {
path = path.DirName().DirName();
if (file_util::PathExists(path.Append("base/base_paths_posix.cc"))) {
*result = path;
return true;
}
}
// If that failed (maybe the build output is symlinked to a different
// drive) try assuming the current directory is the source root.
if (file_util::GetCurrentDirectory(&path) &&
file_util::PathExists(path.Append("base/base_paths_posix.cc"))) {
*result = path;
return true;
}
LOG(ERROR) << "Couldn't find your source root. "
<< "Try running from your chromium/src directory.";
return false;
}
case base::DIR_USER_CACHE:
scoped_ptr<base::EnvVarGetter> env(base::EnvVarGetter::Create());
FilePath cache_dir(base::GetXDGDirectory(env.get(), "XDG_CACHE_HOME",
".cache"));
*result = cache_dir;
return true;
}
return false;
}
} // namespace base
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