Sorry, I'm lying, it is on by default without --enable-sigwinch. Still, that doesn't mean it's a good idea.
On Sat, Apr 23, 2011 at 08:07:00AM +0100, Nicholas Marriott wrote: > Hi > > You need to explicitly configure upstream ncurses with --enable-sigwinch > so many other platforms do not enable it either. They must also have > been affected when ncurses made USE_SIZECHANGE depend on it. We have > never had USE_SIGWINCH on. > > > On Fri, Apr 22, 2011 at 08:24:34PM +0100, Mikolaj Kucharski wrote: > > Hi, > > > > I was troubleshooting issue with window resize in net/ekg. In the past > > it was working properly, but stopped. I figured out that breakage > > happened between OpenBSD 4.6 and 4.7, when ncurses was updated. > > > > I've recompiled ncurses with -DTRACE and and used it with very simple > > program to test (see screensize.c under url mentioned below). > > > > Comparing tracing of above code from OpenBSD 4.6 and OpenBSD 4.9 > > (-current) show that in the latest code function _nc_update_screensize() > > is not executed in doupdate() (lib/libcurses/tty/tty_update.c). It is > > executed however in OpenBSD 4.6. Reason is that USE_SIZECHANGE is > > defined as 0 (zero) bacause of following code (curses.priv.h from 4.9): > > > > > > #if HAVE_SIZECHANGE && USE_SIGWINCH && defined(SIGWINCH) > > #define USE_SIZECHANGE 1 > > #else > > #define USE_SIZECHANGE 0 > > #undef USE_SIGWINCH > > #define USE_SIGWINCH 0 > > #endif > > > > > > HAVE_SIZECHANGE is defined to 1 in OpenBSD 4.6 and 4.9, but USE_SIGWINCH > > is not defined to 1. In OpenBSD 4.6 only HAVE_SIZECHANGE was checked to > > set USE_SIZECHANGE to 1 (curses.priv.h from 4.6): > > > > > > #if HAVE_SIZECHANGE > > #define USE_SIZECHANGE 1 > > #else > > #undef USE_SIGWINCH > > #endif > > > > > > Is there any reason why USE_SIGWINCH is not defined to 1 in current > > OpenBSD (in ncurses_cfg.h)? > > > > > > You can find my debugging files under following location: > > > > http://www1.kucharski.name/pub/ekg/ > > > > - screensize.c -- code to test the issue > > > > - patches for libcurses which enable tracing and adds some additional > > logging > > > > - trace logs, so you can compare how ncurses on OpenBSD 4.6, unpatched > > 4.9 and with USE_SIGWINCH defined to 1 on 4.9 behave > > > > > > > > -- > > best regards > > q#
