mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 20:13:05 +02:00
65 lines
2.3 KiB
C++
65 lines
2.3 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) 2012-2020 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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#pragma once
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#include <openvpn/common/jsonhelper.hpp>
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#include <openvpn/common/fileatomic.hpp>
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namespace openvpn {
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namespace json {
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inline Json::Value read_fast(const std::string& fn,
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const bool optional=true,
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std::uint64_t* mtime_ns=nullptr)
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{
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BufferPtr bp = read_binary_unix(fn, 0, optional ? NULL_ON_ENOENT : 0, mtime_ns);
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if (!bp || bp->empty())
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return Json::Value();
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return parse_from_buffer(*bp, fn);
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}
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inline void write_atomic(const std::string& fn,
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const std::string& tmpdir,
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const mode_t mode,
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const std::uint64_t mtime_ns, // set explicit modification-time in nanoseconds since epoch, or 0 to defer to system
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const Json::Value& root,
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const size_t size_hint,
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RandomAPI& rng)
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{
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BufferPtr bp = new BufferAllocated(size_hint, BufferAllocated::GROW);
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format_compact(root, *bp);
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write_binary_atomic(fn, tmpdir, mode, mtime_ns, *bp, rng);
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}
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inline void write_fast(const std::string& fn,
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const mode_t mode,
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const std::uint64_t mtime_ns, // set explicit modification-time in nanoseconds since epoch, or 0 to defer to system
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const Json::Value& root,
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const size_t size_hint)
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{
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BufferPtr bp = new BufferAllocated(size_hint, BufferAllocated::GROW);
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format_compact(root, *bp);
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write_binary_unix(fn, mode, mtime_ns, *bp);
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}
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}
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}
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