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Date:	Sun, 24 Aug 2008 11:14:28 -0400
From:	Christopher Faylor <cgf-use-the-mailinglist-please AT cygwin DOT com>
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Subject:	Re: SIGPOLL and named pipes
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On Sun, Aug 24, 2008 at 01:47:56PM +0200, Thomas Maier-Komor wrote:
>I don't get SIGPOLL on Cygwin in a software that runs fine on Linux and
>Solaris.  Is there a known issue concerning SIGPOLL and named pipes.

SIGPOLL (aka SIGIO) is not implemented in Cygwin.

>Additionally, there seem to be a bug in Cygwin concerning the
>concatenation of data written to a named pipe.  If I open the named
>pipe a second time with O_WRONLY, to make sure that there is always one
>valid open input to the named pipe, the data written to the pipe from
>different processes doesn't get concatenated and I have to close and
>reopen the named pipe.  This is in contrast to the behavior in Linux
>and Solaris, and POSIX semantics.

Named pipes in Cygwin 1.5.25 are only partially implemented.  They
should work better in 1.7.x.

cgf

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