grep: write errors reported when writing to a pipe

[Richard Brittain]

Hi,
  The most recent update from Red Hat changed something in grep which has
cron scripts spewing lots of non-fatal messages to stderr now.
(grep RPM version 2.5.1-24.5 to 2.5.1-24.6).

It seems to happen when grep writes to a pipe and the pipe is closed by 
the reader, and the write error is reported to stderr (when it didn't used 
to be).  The construct 'grep something /path/file | head -1' generates it
frequently, but the messages are not reproducible.  They only appear from 
cron jobs, but not every instance of grep (traced with 'sh -x'), and I 
couldn't generate it by running the same script at the command line.

Richard
--
Richard Brittain,  Kiewit Computing Services, 6224 Baker/Berry Library
                   Dartmouth College, Hanover NH 03755
Email: address@hidden