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From: Thomas Maier-Komor <thomas AT maier-komor DOT de>
Subject:  Re: SIGPOLL and named pipes
Date:  Sun, 24 Aug 2008 19:29:59 +0200
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Christopher Faylor wrote:
> 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
> 

OK, thanks for the information. Do you know when 1.7 is planned to be
released?

- Thomas


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