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// OpenVPN -- An application to securely tunnel IP networks
// over a single port, with support for SSL/TLS-based
// session authentication and key exchange,
// packet encryption, packet authentication, and
// packet compression.
//
// Copyright (C) 2012-2022 OpenVPN Inc.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License Version 3
// as published by the Free Software Foundation.
//
// 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program in the COPYING file.
// If not, see <http://www.gnu.org/licenses/>.
#ifndef OPENVPN_COMMON_STRERROR_H
#define OPENVPN_COMMON_STRERROR_H
#include <string.h>
#include <string>
#include <errno.h>
namespace openvpn {
inline std::string strerror_str(const int errnum)
{
static const char unknown_err[] = "UNKNOWN_SYSTEM_ERROR";
char buf[128];
#if defined(__GLIBC__) && (!defined(__USE_XOPEN2K) || defined(__USE_GNU))
// GNU
const char *errstr = ::strerror_r(errnum, buf, sizeof(buf));
if (errstr)
return std::string(errstr);
#else
// POSIX
if (::strerror_r(errnum, buf, sizeof(buf)) == 0)
return std::string(buf);
#endif
return std::string(unknown_err);
}
} // namespace openvpn
#endif
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