Re: towards 4.4 (ctrl+c issue for gnuplot.exe(windows))

[Tatsuro M. <tma...@ya...>]

Hello

I have traced this issue.
--- Ethan Merritt wrote:
> > ****************
> > --- gnuplot-4.3.0-2009-07-08-orig/src/plot.c	2009-09-20 20:16:47 +0200
> > +++ gnuplot-4.3.0-2009-07-08/src/plot.c	2009-10-18 13:06:08 +0200
> > @@ -684,7 +684,11 @@
> >      setmatherr(purec_matherr);
> >  #endif
> >  
> > +#if defined(WGP_CONSOLE)
> > +    (void) signal(SIGINT, SIG_IGN);
> > +#else
> >      (void) signal(SIGINT, (sigfunc) inter);
> > +#endif
> >  
> >  #ifdef SIGPIPE
> >      /* ignore pipe errors, this might happen with set output "|head" */
> > ******************

I have completely misunderstood the situation.  The (void) signal(SIGINT, (sigfunc) inter); works on
gnuplot.exe. Pressing CTRL+C, inter(int anint) was surely called.

In the function 'inter', the below exist

    term_reset();
    (void) putc('\n', stderr);
    bail_to_command_line();	/* return to prompt */

#####
The upper two 
    term_reset();
    (void) putc('\n', stderr);

was executed correctly and fails at     bail_to_command_line();.

bail_to_command_line() is described as

void
bail_to_command_line()
{
#ifdef _Windows
    call_kill_pending_Pause_dialog();
#endif
    LONGJMP(command_line_env, TRUE);
}
 
call_kill_pending_Pause_dialog(); exist in commnand.c, and it just call the function
kill_pending_Pause_dialog(); in the following in winmain.c

***
void
kill_pending_Pause_dialog ()
{
	if (pausewin.bPause == FALSE) /* no Pause dialog displayed */
	    return;
	/* Pause dialog displayed, thus kill it */
	DestroyWindow(pausewin.hWndPause);
#ifndef WIN32
#ifndef __DLL__
	FreeProcInstance((FARPROC)pausewin.lpfnPauseButtonProc);
#endif
#endif
	pausewin.bPause = FALSE;
}


Obviously, kill_pending_Pause_dialog() has no meaning for gnuplot.exe.

I have quickly tried to modify bail_to_command_line() and , 

bail_to_command_line()
{
#if defined(_Windows) && !defined(WGP_CONSOLE)
    call_kill_pending_Pause_dialog();
#endif
    LONGJMP(command_line_env, TRUE);
}

However, gnuplot.exe still hangs up. 

    LONGJMP(command_line_env, TRUE);

seems not work for windows console mode.

Perhaps, the above things have known but I have noticed this time.

Any suggestions?

Regards

Tatsuro




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