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+++ This bug was initially created as a clone of Bug #880081 +++

Description of problem:
/usr/bin/zforce fails to identify and rename valid gzipped files

Version-Release number of selected component (if applicable):

gzip-1.3.12-18.el6

How reproducible:
always

Steps to Reproduce:
1.	touch /tmp/test
2. gzip /tmp/test
3. mv /tmp/test.gz /tmp/test
4. zforce /tmp/test
  
Actual results:
Nothing happens

Expected results:
/tmp/test should be renamed to /tmp/test.gz

Additional info:

The /usr/bin/zforce utility is a script. Line 61

if gzip -l < "$i" 2>/dev/null | grep '^compressed' > /dev/null; then

is incorrect. The output of gzip -l /tmp/file (see above) is

         compressed uncompressed ratio uncompressed_name
                 25 0 0.0% /tmp/file

so '^compressed' fails because of the spaces printed in front of "compressed"

This request was evaluated by Red Hat Product Management for
inclusion in the current release of Red Hat Enterprise Linux.
Because the affected component is not scheduled to be updated
in the current release, Red Hat is unable to address this
request at this time.

Red Hat invites you to ask your support representative to
propose this request, if appropriate, in the next release of
Red Hat Enterprise Linux.

Created attachment 923846 [details]
easy-patch

edited regexp in origin patch

I think this should be fast-track.

No doc needed. Just zforce will not work, which previously didn't.

(In reply to pstodulk from comment #7)
> No doc needed. Just zforce will not work, which previously didn't.

Of course, it will work now :-)

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2017-0639.html