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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_info.h"
#include "crc.h"
#include "file_access.h"
#include "sys_version.h"
#include "symlink_target.h"
#include "time.h"
#include "file_io.h"
#include <ifaddrs.h>
#include <net/if.h> //IFF_LOOPBACK
#include <netpacket/packet.h> //sockaddr_ll
#include "process_exec.h"
#include <unistd.h> //getuid()
#include <pwd.h> //getpwuid_r()
using namespace zen;
Zstring zen::getUserName() //throw FileError
{
const uid_t userIdNo = ::getuid(); //never fails
if (userIdNo != 0) //nofail; root(0) => consider as request for elevation, NOT impersonation
{
std::vector<char> buf(std::max<long>(10000, ::sysconf(_SC_GETPW_R_SIZE_MAX))); //::sysconf may return long(-1)
passwd buf2 = {};
passwd* pwsEntry = nullptr;
if (::getpwuid_r(userIdNo, //uid_t uid
&buf2, //struct passwd* pwd
&buf[0], //char* buf
buf.size(), //size_t buflen
&pwsEntry) != 0) //struct passwd** result
THROW_LAST_FILE_ERROR(_("Cannot get process information."), "getpwuid_r");
if (!pwsEntry)
throw FileError(_("Cannot get process information."), L"no login found"); //should not happen?
return pwsEntry->pw_name;
}
//else root(0): what now!?
//getlogin() is smarter than simply evaluating $LOGNAME! even in contexts without
//$LOGNAME, e.g. "sudo su" on Ubuntu, it returns the correct non-root user!
if (const char* loginUser = ::getlogin()) //https://linux.die.net/man/3/getlogin
if (strLength(loginUser) > 0 && !equalString(loginUser, "root"))
return loginUser;
//BUT: getlogin() can fail with ENOENT on Linux Mint: https://freefilesync.org/forum/viewtopic.php?t=8181
auto tryGetNonRootUser = [](const char* varName) -> const char*
{
if (const char* buf = ::getenv(varName)) //no extended error reporting
if (strLength(buf) > 0 && !equalString(buf, "root"))
return buf;
return nullptr;
};
//getting a little desperate: variables used by installer.sh
if (const char* userName = tryGetNonRootUser("USER")) return userName;
if (const char* userName = tryGetNonRootUser("SUDO_USER")) return userName;
if (const char* userName = tryGetNonRootUser("LOGNAME")) return userName;
throw FileError(_("Cannot get process information."), L"Failed to determine non-root user name"); //should not happen?
}
namespace
{
}
ComputerModel zen::getComputerModel() //throw FileError
{
ComputerModel cm;
try
{
auto tryGetInfo = [](const Zstring& filePath)
{
if (!fileAvailable(filePath))
return std::wstring();
try
{
const std::string stream = getFileContent(filePath, nullptr /*notifyUnbufferedIO*/); //throw FileError
return utfTo<std::wstring>(trimCpy(stream));
}
catch (const FileError& e) { throw SysError(replaceCpy(e.toString(), L"\n\n", L'\n')); } //errors should be further enriched by context info => SysError
};
cm.model = tryGetInfo("/sys/devices/virtual/dmi/id/product_name"); //throw SysError
cm.vendor = tryGetInfo("/sys/devices/virtual/dmi/id/sys_vendor"); //
//clean up:
cm.model = beforeFirst(cm.model, L'\u00ff', IfNotFoundReturn::all); //fix broken BIOS entries:
cm.vendor = beforeFirst(cm.vendor, L'\u00ff', IfNotFoundReturn::all); //0xff can be considered 0
for (const char* dummyModel :
{
"To Be Filled By O.E.M.", "Default string", "$(DEFAULT_STRING)", "Undefined", "empty", "O.E.M", "OEM", "NA",
"System Product Name", "Please change product name", "INVALID",
})
if (equalAsciiNoCase(cm.model, dummyModel))
{
cm.model.clear();
break;
}
for (const char* dummyVendor :
{
"To Be Filled By O.E.M.", "Default string", "$(DEFAULT_STRING)", "Undefined", "empty", "O.E.M", "OEM", "NA",
"System manufacturer", "OEM Manufacturer",
})
if (equalAsciiNoCase(cm.vendor, dummyVendor))
{
cm.vendor.clear();
break;
}
return cm;
}
catch (const SysError& e) { throw FileError(_("Cannot get process information."), e.toString()); }
}
std::wstring zen::getOsDescription() //throw FileError
{
try
{
const OsVersionDetail verDetail = getOsVersionDetail(); //throw SysError
return trimCpy(verDetail.osName + L' ' + verDetail.osVersionRaw); //e.g. "CentOS 7.8.2003"
}
catch (const SysError& e) { throw FileError(_("Cannot get process information."), e.toString()); }
}
Zstring zen::getRealProcessPath() //throw FileError
{
return getSymlinkRawContent("/proc/self/exe").targetPath; //throw FileError
//path does not contain symlinks => no need for ::realpath()
}
Zstring zen::getUserDataPath() //throw FileError
{
if (::getuid() != 0) //nofail; root(0) => consider as request for elevation, NOT impersonation
if (const char* xdgCfgPath = ::getenv("XDG_CONFIG_HOME"); //no extended error reporting
xdgCfgPath && xdgCfgPath[0] != 0)
return xdgCfgPath;
return "/home/" + getUserName() + "/.config"; //throw FileError
}
Zstring zen::getUserDownloadsPath() //throw FileError
{
try
{
const Zstring cmdLine = ::getuid() == 0 ? //nofail; root(0) => consider as request for elevation, NOT impersonation
//sudo better be installed :>
"sudo -u " + getUserName() + " xdg-user-dir DOWNLOAD" : //throw FileError
"xdg-user-dir DOWNLOAD";
const auto& [exitCode, output] = consoleExecute(cmdLine, std::nullopt /*timeoutMs*/); //throw SysError
if (exitCode != 0) //fallback: probably correct 99.9% of the time anyway...
return "/home/" + getUserName() + "/Downloads"; //throw FileError
const Zstring& downloadsPath = trimCpy(output);
ASSERT_SYSERROR(!downloadsPath.empty());
return downloadsPath;
}
catch (const SysError& e) { throw FileError(_("Cannot get process information."), e.toString()); }
}
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