Function getUserName

programs/keeper/Keeper.cpp:165–183

}

std::string getUserName(uid_t user_id)
{
    /// Try to convert user id into user name.
    auto buffer_size = sysconf(_SC_GETPW_R_SIZE_MAX);
    if (buffer_size <= 0)
        buffer_size = 1024;
    std::string buffer;
    buffer.reserve(buffer_size);

    struct passwd passwd_entry;
    struct passwd * result = nullptr;
    const auto error = getpwuid_r(user_id, &passwd_entry, buffer.data(), buffer_size, &result);

    if (error)
        throwFromErrno("Failed to find user name for " + toString(user_id), ErrorCodes::FAILED_TO_GETPWUID, error);
    else if (result)
        return result->pw_name;
    return toString(user_id);
}

}