sigwait() and "sticky" signals (SIGWINCH...) in Cygwin 1.7

[Christopher Faylor]

On Wed, Aug 26, 2009 at 08:13:37PM +0000, Waldemar Rachwal wrote:
>I observe strange behavior of sigwait() with SIGWINCH signal (and possibly
>others... like SIGCHLD).
>
>Look at a short program below. In a loop I wait for SIG{INT,WINCH} signals.
>SIGWINCH, similarly to SIGCHLD is ignored by default, so I had to register a
>dummy signal handler for it.
>
>When the program (compiled with gcc-4) is running, SIGWINCH is never returned by
>the sigwait() immediately after window's resize, but always along with
>successive SIGINT when I press Ctrl+C.

If you are talking about the resizing of, say, the standard Windows
console window that Cygwin runs in by default then that is,
unfortunately, a limitation in Cygwin's implementation of SIGWINCH that
is probably not going to change.

It should work much better when running in rxvt, mintty, or xterm
though.

cgf

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