1 files changed, 85 insertions, 0 deletions
diff --git a/src/unix/PidFile.hxx b/src/unix/PidFile.hxx
new file mode 100644
index 000000000..a242c7810
--- /dev/null
+++ b/src/unix/PidFile.hxx
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_PID_FILE_HXX
+#define MPD_PID_FILE_HXX
+
+#include "fs/FileSystem.hxx"
+#include "fs/AllocatedPath.hxx"
+#include "Log.hxx"
+
+#include <assert.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+class PidFile {
+	FILE *file;
+
+public:
+	PidFile(const AllocatedPath &path):file(nullptr) {
+		if (path.IsNull())
+			return;
+
+		file = FOpen(path, "w");
+		if (file == nullptr) {
+			const std::string utf8 = path.ToUTF8();
+			FormatFatalSystemError("Failed to create pid file \"%s\"",
+					       path.c_str());
+		}
+	}
+
+	PidFile(const PidFile &) = delete;
+
+	void Close() {
+		if (file == nullptr)
+			return;
+
+		fclose(file);
+	}
+
+	void Delete(const AllocatedPath &path) {
+		if (file == nullptr) {
+			assert(path.IsNull());
+			return;
+		}
+
+		assert(!path.IsNull());
+
+		fclose(file);
+		RemoveFile(path);
+	}
+
+	void Write(pid_t pid) {
+		if (file == nullptr)
+			return;
+
+		fprintf(file, "%lu\n", (unsigned long)pid);
+		fclose(file);
+	}
+
+	void Write() {
+		if (file == nullptr)
+			return;
+
+		Write(getpid());
+	}
+};
+
+#endif