1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "base/sys_info.h" 6 7 #include "base/basictypes.h" 8 #include "base/file_path.h" 9 #include "base/file_util.h" 10 #include "base/string_tokenizer.h" 11 #include "base/string_util.h" 12 13 namespace base { 14 15 #if defined(GOOGLE_CHROME_BUILD) 16 static const char kLinuxStandardBaseVersionKey[] = "GOOGLE_RELEASE"; 17 #else 18 static const char kLinuxStandardBaseVersionKey[] = "DISTRIB_RELEASE"; 19 #endif 20 21 const char kLinuxStandardBaseReleaseFile[] = "/etc/lsb-release"; 22 23 // static 24 void SysInfo::OperatingSystemVersionNumbers(int32 *major_version, 25 int32 *minor_version, 26 int32 *bugfix_version) { 27 // TODO(cmasone): If this gets called a lot, it may kill performance. 28 // consider using static variables to cache these values? 29 FilePath path(kLinuxStandardBaseReleaseFile); 30 std::string contents; 31 if (file_util::ReadFileToString(path, &contents)) { 32 ParseLsbRelease(contents, major_version, minor_version, bugfix_version); 33 } 34 } 35 36 // static 37 std::string SysInfo::GetLinuxStandardBaseVersionKey() { 38 return std::string(kLinuxStandardBaseVersionKey); 39 } 40 41 // static 42 void SysInfo::ParseLsbRelease(const std::string& lsb_release, 43 int32 *major_version, 44 int32 *minor_version, 45 int32 *bugfix_version) { 46 size_t version_key_index = lsb_release.find(kLinuxStandardBaseVersionKey); 47 if (std::string::npos == version_key_index) { 48 return; 49 } 50 size_t start_index = lsb_release.find_first_of('=', version_key_index); 51 start_index++; // Move past '='. 52 size_t length = lsb_release.find_first_of('\n', start_index) - start_index; 53 std::string version = lsb_release.substr(start_index, length); 54 StringTokenizer tokenizer(version, "."); 55 for (int i = 0; i < 3 && tokenizer.GetNext(); i++) { 56 if (0 == i) { 57 *major_version = StringToInt(tokenizer.token()); 58 *minor_version = *bugfix_version = 0; 59 } else if (1 == i) { 60 *minor_version = StringToInt(tokenizer.token()); 61 } else { // 2 == i 62 *bugfix_version = StringToInt(tokenizer.token()); 63 } 64 } 65 } 66 67 } // namespace base 68
