pipe improvements in snapshot

[Pavel Holejsovsky]

nhv@cape.com wrote:
> Christopher Faylor wrote:
>>On Thu, Dec 12, 2002 at 07:32:16AM -0500, Norman Vine wrote:
>>>Any 'tips' as to how to best debug this appreciated 
>>
>>- Attach to the hung process with gdb and see where it is hung.
>>
>>- Provide cygcheck output.
>>
>>- Run under strace and see if you can infer where hangs or problems
>>  are occurring.

The hung process (sed) is actually not hung, but connected to stdin 
instead of file. The root cause is that when config.status is processed 
by bash, then sometimes `` construct forgets all output, causing 
different generated file names to be empty, thus connecting sed to stdin 
instead of some file. Following command line reproduces the bug for me:

while true; do test "`echo foo`" = "foo" || echo failed; done

When this command is run inside bash, then "failed" lines appear quite 
regularly. The bug is reproducible only with /bin/bash, /bin/sh works 
reliably.

Pavel

P.S. I'm leaving today, I won't answer emails till January 6th, sorry..

-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: cygcheck.out
URL: <http://cygwin.com/pipermail/cygwin/attachments/20021213/07b2cbc4/attachment.ksh>
-------------- next part --------------
--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/