/usr/include/libguytools2/toolsignal.h is in libguytools2-dev 2.0.1-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Project: libguytools
// ****************************************************************************
// Programmer: Guy Voncken
// Police Grand-Ducale
// Service de Police Judiciaire
// Section Nouvelles Technologies
// ****************************************************************************
// Module: Signal handler with backtrace
// ****************************************************************************
#ifndef __TOOLSIGNAL_H__
#define __TOOLSIGNAL_H__
// Description of module ToolSignal
// --------------------------------
// This module does all the standard signal handling work for an application. When catching a standard
// signal (Kill, Hup, Break...) it calls the function that has been indicated in param pFnLog.
// If ever a segment violation occurs, a stack trace is done in order to log the function call sequence
// before exiting the program.
//
// All logging is done via the function indicated in param pFnLog. If that one is NULL, the module writes
// its log outputs to stdout. Its first parameter (Error) indicates whether a normal log output (info) or
// whether an error log entry should be done.
//
// It might be important to know for the application, that ToolSignalInit starts a new thread. The function
// indicated in param pFnSig is called from that thread, if pFnSig is not NULL. The ID of the new thread is
// written to where pThreadId points, if pThreadId is not NULL.
typedef void (* t_pToolSignalLogFn )(bool Error, int ThreadNr, const char *pFileName, const char *pFunction, int LineNr, const char *pFormat, va_list pArguments);
typedef void (* t_pToolSignalHandler)(int Signal);
int ToolSignalInit (t_pToolSignalLogFn pFnLog, t_pToolSignalHandler pFnSig, int *pThreadId);
int ToolSignalDeInit (void);
// class t_ToolSignal: public QThread
// {
// public:
// t_ToolSignal (int Err, int *pThreadId);
// ~t_ToolSignal();
// void run();
// static void BacktraceSignalHandler (int signalHandled, siginfo_t *signalInfo, void *secret);
//
// static APIRET SetLogFn (t_pToolSignalLogFn pFn);
// static APIRET SetSignalHandlerFn (t_pToolSignalHandler pFn);
// };
// typedef t_ToolSignal *t_pToolSignal;
// -------------------------------
// Error codes
// -------------------------------
enum
{
ERROR_TOOLSIGNAL_ALREADY_INITIALISED = ERROR_BASE_TOOL_SIGNAL + 1,
ERROR_TOOLSIGNAL_NOT_INITIALISED,
ERROR_TOOLSIGNAL_STARTTHREAD_FAILED
};
#endif
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