86 lines
1.8 KiB
C++
86 lines
1.8 KiB
C++
/*
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* Copyright (C) 2003-2014 The Music Player Daemon Project
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* http://www.musicpd.org
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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 General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_PID_FILE_HXX
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#define MPD_PID_FILE_HXX
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#include "fs/FileSystem.hxx"
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#include "fs/AllocatedPath.hxx"
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#include "Log.hxx"
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#include <assert.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <unistd.h>
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class PidFile {
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FILE *file;
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public:
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PidFile(const AllocatedPath &path):file(nullptr) {
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if (path.IsNull())
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return;
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file = FOpen(path, "w");
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if (file == nullptr) {
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const std::string utf8 = path.ToUTF8();
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FormatFatalSystemError("Failed to create pid file \"%s\"",
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path.c_str());
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}
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}
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PidFile(const PidFile &) = delete;
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void Close() {
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if (file == nullptr)
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return;
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fclose(file);
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}
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void Delete(const AllocatedPath &path) {
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if (file == nullptr) {
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assert(path.IsNull());
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return;
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}
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assert(!path.IsNull());
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fclose(file);
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RemoveFile(path);
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}
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void Write(pid_t pid) {
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if (file == nullptr)
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return;
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fprintf(file, "%lu\n", (unsigned long)pid);
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fclose(file);
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}
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void Write() {
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if (file == nullptr)
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return;
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Write(getpid());
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}
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};
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#endif
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