/*
Copyright Contributors to the libdnf project.

This file is part of libdnf: https://github.com/rpm-software-management/libdnf/

Libdnf is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2.1 of the License, or
(at your option) any later version.

Libdnf 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with libdnf.  If not, see <https://www.gnu.org/licenses/>.
*/

#ifndef LIBDNF5_COMMON_PROC_HPP
#define LIBDNF5_COMMON_PROC_HPP

#include "libdnf5/defs.h"

#include <sys/types.h>


namespace libdnf5 {

constexpr uid_t INVALID_UID = static_cast<uid_t>(-1);

/// Read the process owner login uid from the "/proc/<pid>/loginuid".
/// @param pid process id
/// @return libdnf5::INVALID_UID if fails, login uid otherwise
/// @since 5.0
LIBDNF_API uid_t read_login_uid_from_proc(pid_t pid) noexcept;

/// Return the current user login uid, if available.
/// The getuid() is returned instead if there was a problem.
/// The value is cached.
/// @since 5.0
LIBDNF_API uid_t get_login_uid() noexcept;

}  // namespace libdnf5

#endif
