mirror of
https://github.com/OpenVPN/openvpn3.git
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16b10559f2
OpenVPN Technologies, Inc. change their name to OpenVPN Inc. during the autumn of 2017. Signed-off-by: David Sommerseth <davids@openvpn.net>
71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
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// over a single port, with support for SSL/TLS-based
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// session authentication and key exchange,
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// packet encryption, packet authentication, and
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// packet compression.
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//
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// Copyright (C) 2012-2017 OpenVPN Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License Version 3
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// as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program in the COPYING file.
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// If not, see <http://www.gnu.org/licenses/>.
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#ifndef OPENVPN_COMMON_STAT_H
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#define OPENVPN_COMMON_STAT_H
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <cstdint> // for std::uint64_t
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namespace openvpn {
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// Return true if file exists
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inline bool file_exists(const std::string& filename)
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{
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if (filename.empty())
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return false;
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struct stat buffer;
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return stat(filename.c_str(), &buffer) == 0;
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}
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// Return file modification time (in seconds since unix epoch) or 0 on error
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inline time_t file_mod_time(const std::string& filename)
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{
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struct stat buffer;
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if (stat(filename.c_str(), &buffer) != 0)
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return 0;
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else
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return buffer.st_mtime;
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}
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// Return file modification time (in nanoseconds since unix epoch) or 0 on error
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inline std::uint64_t file_mod_time_nanoseconds(const std::string& filename)
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{
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typedef std::uint64_t T;
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struct stat s;
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if (::stat(filename.c_str(), &s) == 0)
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return T(s.st_mtim.tv_sec) * T(1000000000) + T(s.st_mtim.tv_nsec);
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else
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return 0;
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}
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// Return file modification time (in milliseconds since unix epoch) or 0 on error
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inline std::uint64_t file_mod_time_milliseconds(const std::string& filename)
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{
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return file_mod_time_nanoseconds(filename) / std::uint64_t(1000000);
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}
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}
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#endif
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