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// Copyright (c) 2009 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.
#include "base/sys_info.h"
#include "base/basictypes.h"
#include "base/file_path.h"
#include "base/file_util.h"
#include "base/string_number_conversions.h"
#include "base/string_tokenizer.h"
#include "base/thread_restrictions.h"
namespace base {
#if defined(GOOGLE_CHROME_BUILD)
static const char kLinuxStandardBaseVersionKey[] = "GOOGLE_RELEASE";
#else
static const char kLinuxStandardBaseVersionKey[] = "DISTRIB_RELEASE";
#endif
const char kLinuxStandardBaseReleaseFile[] = "/etc/lsb-release";
// static
void SysInfo::OperatingSystemVersionNumbers(int32 *major_version,
int32 *minor_version,
int32 *bugfix_version) {
// The other implementations of SysInfo don't block on the disk.
// See http://code.google.com/p/chromium/issues/detail?id=60394
// Perhaps the caller ought to cache this?
// Temporary allowing while we work the bug out.
base::ThreadRestrictions::ScopedAllowIO allow_io;
// TODO(cmasone): If this gets called a lot, it may kill performance.
// consider using static variables to cache these values?
FilePath path(kLinuxStandardBaseReleaseFile);
std::string contents;
if (file_util::ReadFileToString(path, &contents)) {
ParseLsbRelease(contents, major_version, minor_version, bugfix_version);
}
}
// static
std::string SysInfo::GetLinuxStandardBaseVersionKey() {
return std::string(kLinuxStandardBaseVersionKey);
}
// static
void SysInfo::ParseLsbRelease(const std::string& lsb_release,
int32 *major_version,
int32 *minor_version,
int32 *bugfix_version) {
size_t version_key_index = lsb_release.find(kLinuxStandardBaseVersionKey);
if (std::string::npos == version_key_index) {
return;
}
size_t start_index = lsb_release.find_first_of('=', version_key_index);
start_index++; // Move past '='.
size_t length = lsb_release.find_first_of('\n', start_index) - start_index;
std::string version = lsb_release.substr(start_index, length);
StringTokenizer tokenizer(version, ".");
for (int i = 0; i < 3 && tokenizer.GetNext(); i++) {
if (0 == i) {
StringToInt(tokenizer.token_begin(),
tokenizer.token_end(),
major_version);
*minor_version = *bugfix_version = 0;
} else if (1 == i) {
StringToInt(tokenizer.token_begin(),
tokenizer.token_end(),
minor_version);
} else { // 2 == i
StringToInt(tokenizer.token_begin(),
tokenizer.token_end(),
bugfix_version);
}
}
}
} // namespace base
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