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/*
* This file is part of the AzerothCore Project. See AUTHORS file for Copyright information.
*
* Portions of this file are derived from systemd, licensed under:
* - GPL-2.0-or-later (if the original systemd file was GPL-2.0+)
* OR
* - LGPL-2.1-or-later, relicensed under GPL-2.0-or-later as permitted by LGPL-2.1+
*
* Original systemd copyright:
* Copyright (c) the systemd contributors.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#if defined(__linux__)
#include "Log.h"
#include "StringConvert.h"
#include <cstdlib>
#include <unistd.h>
#include <string>
int get_listen_fd()
{
char* const listen_pid = std::getenv("LISTEN_PID");
char* const listen_fds = std::getenv("LISTEN_FDS");
if (!listen_pid || !listen_fds)
return 0;
pid_t pid = Acore::StringTo<int>(listen_pid).value_or(0);
if (pid != getpid())
return 0;
int fds = Acore::StringTo<int>(listen_fds).value_or(0);
if (fds <= 0)
return 0;
if (fds > 1)
LOG_WARN("network", "Multiple file descriptors received from systemd socket activation, only the first will be used");
return 3;
}
#else
// On non-Linux systems, just return 0 (no socket activation)
int get_listen_fd()
{
return 0;
}
#endif
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