mirror of https://bitbucket.org/anguist/ntpa
105 lines
3.4 KiB
C#
105 lines
3.4 KiB
C#
//
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// Copyright (c) 2013-2016 Carsten Sonne Larsen <cs@innolan.dk>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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using System;
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using Mono.Unix;
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using Mono.Unix.Native;
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using Ntp.Common.Log;
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namespace Ntp.Common.System
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{
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public static class InterProcess
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{
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public enum Signal
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{
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Error = 0,
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Exit,
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Reload,
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Refresh,
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Notify
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}
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private static UnixSignal sigterm, sigquit, sigint, sighup, sigusr1, sigusr2;
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private static readonly UnixSignal[] Signals =
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{
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sigint = new UnixSignal(Signum.SIGINT),
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sigterm = new UnixSignal(Signum.SIGTERM),
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sigquit = new UnixSignal(Signum.SIGQUIT),
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sighup = new UnixSignal(Signum.SIGHUP),
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sigusr1 = new UnixSignal(Signum.SIGUSR1),
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sigusr2 = new UnixSignal(Signum.SIGUSR2)
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};
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public static Signal Wait(string name, LogBase log)
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{
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while (true)
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{
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int i;
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try
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{
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i = UnixSignal.WaitAny(Signals, -1);
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}
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catch (Exception e)
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{
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log.WriteLine("Unrecoverable error in UnixSignal.WaitAny()",
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Severity.Error);
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log.WriteLine(e, Severity.Trace);
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return Signal.Error;
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}
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if (i < 0 || i >= Signals.Length)
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{
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log.WriteLine($"Received unknown signal {Signals[i].Signum}", Severity.Warn);
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continue;
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}
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log.WriteLine($"Received signal {Signals[i].Signum}", Severity.Debug);
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if (sigint.IsSet || sigterm.IsSet || sigquit.IsSet)
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{
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sigint.Reset();
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sigterm.Reset();
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sigquit.Reset();
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return Signal.Exit;
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}
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if (sighup.IsSet)
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{
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sighup.Reset();
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return Signal.Refresh;
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}
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if (sigusr1.IsSet)
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{
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sigusr1.Reset();
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return Signal.Reload;
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}
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if (sigusr2.IsSet)
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{
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sigusr2.Reset();
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return Signal.Notify;
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}
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}
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}
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}
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} |