Re: gdb and SIGWINCH

[Thomas Dickey]

On Thu, 24 Sep 2009, james morris wrote:

> On 24/9/2009, "Thomas Dickey" <address@hidden> wrote:
>
> > On Thu, 24 Sep 2009, james morris wrote:
> >
> > > Hi,
> > >
> > > gdb shows:
> > >
> > > (gdb) handle SIGWINCH
> > > Signal        Stop      Print   Pass to program Description
> > > SIGWINCH      No        No      Yes             Window size changed
> > >
> > > but resizing the window still has no effect (KEY_RESIZE is detected in my
> > > code ;-)
> >
> > I'm not sure what's not working: if your program reads KEY_RESIZE, and
> > then does a refresh (or another wgetch which does a refresh), ncurses
> > is supposed to call resizeterm, which resizes stdscr, etc., to fit
> > in the new LINES/COLS limits.
>
> Yes, that happens normally, but when I run the program in gdb and resize
> the window, wgetch never returns KEY_RESIZE.
>
> (Sorry, in an effort to get straight to the point I omitted too much
> detail.)
>
> So it seems that gdb is not passing SIGWINCH to ncurses, despite the
> above output claiming it does. As much as I could find on the subject
> was this:
>
> http://www.mail-archive.com/address@hidden/msg231762.html
>
> Is it still a bug in the Debian gdb, or is there something else which
> needs setting within gdb for it to pass SIGWINCH to program?

The bug's not marked closed - I'd have to assume it's not been fixed.

> One last question: is this list meant for developers and debuggers of
> ncurses rather than developers who wish to use it in their programs?

There's some discussion - which as long as it's topical doesn't seem to
bother people.  (I'm on the lookout for details which may be a bug or
limitation in ncurses).

--
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net