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// *****************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: https://www.gnu.org/licenses/gpl-3.0 *
// * Copyright (C) Zenju (zenju AT freefilesync DOT org) - All Rights Reserved *
// *****************************************************************************
#include "sys_version.h"
#include <iostream>
#include "file_io.h"
#include "process_exec.h"
using namespace zen;
OsVersionDetail zen::getOsVersionDetail() //throw SysError
{
/* prefer lsb_release: lsb_release Distributor ID: Debian
1. terser OS name Release: 8.11
2. detailed version number
/etc/os-release NAME="Debian GNU/Linux"
VERSION_ID="8" */
std::wstring osName;
std::wstring osVersion;
try
{
if (const auto [exitCode, output] = consoleExecute("lsb_release --id -s", std::nullopt); //throw SysError
exitCode != 0)
throw SysError(formatSystemError("lsb_release --id",
replaceCpy(_("Exit code %x"), L"%x", numberTo<std::wstring>(exitCode)), utfTo<std::wstring>(output)));
else
osName = utfTo<std::wstring>(trimCpy(output));
if (const auto [exitCode, output] = consoleExecute("lsb_release --release -s", std::nullopt); //throw SysError
exitCode != 0)
throw SysError(formatSystemError("lsb_release --release",
replaceCpy(_("Exit code %x"), L"%x", numberTo<std::wstring>(exitCode)), utfTo<std::wstring>(output)));
else
osVersion = utfTo<std::wstring>(trimCpy(output));
}
//lsb_release not available on some systems: https://freefilesync.org/forum/viewtopic.php?t=7191
catch (SysError&) // => fall back to /etc/os-release: https://www.freedesktop.org/software/systemd/man/os-release.html
{
std::string releaseInfo;
try
{
releaseInfo = getFileContent("/etc/os-release", nullptr /*notifyUnbufferedIO*/); //throw FileError
}
catch (const FileError& e) { throw SysError(replaceCpy(e.toString(), L"\n\n", L'\n')); } //errors should be further enriched by context info => SysError
split(releaseInfo, '\n', [&](const std::string_view line)
{
if (startsWith(line, "NAME="))
osName = utfTo<std::wstring>(afterFirst(line, '=', IfNotFoundReturn::none));
else if (startsWith(line, "VERSION_ID="))
osVersion = utfTo<std::wstring>(afterFirst(line, '=', IfNotFoundReturn::none));
//PRETTY_NAME? too wordy! e.g. "Fedora 17 (Beefy Miracle)"
});
trim(osName, TrimSide::both, [](char c) { return c == L'"' || c == L'\''; });
trim(osVersion, TrimSide::both, [](char c) { return c == L'"' || c == L'\''; });
}
if (osName.empty())
throw SysError(L"Operating system release could not be determined."); //should never happen!
//osVersion is usually available, except for Arch Linux: https://freefilesync.org/forum/viewtopic.php?t=7276
// lsb_release Release is "rolling"
// etc/os-release: VERSION_ID is missing
std::vector<std::wstring_view> verDigits = splitCpy<std::wstring_view>(osVersion, L'.', SplitOnEmpty::allow); //e.g. "7.7.1908"
verDigits.resize(2);
return OsVersionDetail
{
{
stringTo<int>(verDigits[0]),
stringTo<int>(verDigits[1])
},
osVersion, osName
};
}
OsVersion zen::getOsVersion()
{
static const OsVersionDetail verDetail = []
{
try
{
return getOsVersionDetail(); //throw SysError
}
catch (const SysError& e)
{
std::cerr << utfTo<std::string>(e.toString()) + '\n';
return OsVersionDetail{}; //sigh, it's a jungle out there: https://freefilesync.org/forum/viewtopic.php?t=7276
}
}();
return verDetail.version;
}
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