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grep(1) - strange behaviour (most likely a bug) -- `grep -i --colour ""`
From: |
martinko |
Subject: |
grep(1) - strange behaviour (most likely a bug) -- `grep -i --colour ""` |
Date: |
Mon, 21 Mar 2005 23:29:42 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.7.5) Gecko/20050220 |
hello,
i've found a bug in grep(1). short description follows.
i filed this bug originally with freebsd team but was just advised to
contact you in the first place.
original report with examples can be found here:
http://www.freebsd.org/cgi/query-pr.cgi?pr=bin/79063
should you need my further assistance pls let me know.
regards,
martin
--
*Environment*
FreeBSD mb-aw1n-bsd 5.3-RELEASE-p5 FreeBSD 5.3-RELEASE-p5 #5: Mon Feb 14
19:45:04 CET 2005 address@hidden:/usr/obj/usr/src/sys/MB-AW1N i386
*Description*
`grep -i --colour ""` runs mad and seems to generate ansi escape codes in a
(infinite?) loop. it happens only when using empty ("") search string and both parameters
(-i and --colour) are used.
pls find my orginal description below as posted to freebsd-questions mailing
list. i also produced a typescript with script(1) which you may find under the
2nd link/post.
http://lists.freebsd.org/pipermail/freebsd-questions/2005-March/081083.html
http://lists.freebsd.org/pipermail/freebsd-questions/2005-March/081202.html
*How-To-Repeat*
just run the following:
grep -i --colour ""
as soon as you type the first letter it gets mad and soon you'll have a huge
typescript file as you can see in the link above.
codes/chars generated (as output on screen) seem to be random but i'm not sure
about it.
**
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