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

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

Hello

Sorry I have still misled.

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

If, for example, I modify 
    (void) putc('\n', stderr);
    char buf[256];
    fgets(buf, strlen(buf), stdin);
    bail_to_command_line();	/* return to prompt */


    fgets(buf, strlen(buf), stdin);
is ignored. That is a problem.
I have tried term->waitforinput(), the result was the same.

Regards

Tatsuro

--- Tatsuro MATSUOKA  wrote:

> 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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