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diff --git a/src/util.h b/src/util.h
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+#ifndef __UTIL_H
+#define __UTIL_H
+
+#include <string>
+using namespace std;
+
+class pid_file {
+ public:
+ string file_name;
+ bool unlink_pid;
+
+ pid_file()
+ : unlink_pid(false) { }
+ ~pid_file() { unlink(); }
+
+ void set(const string& f,bool u=true);
+ void unlink();
+};
+
+#endif /* __UTIL_H */