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Date: Mon, 7 Aug 2000 05:45:52 +0200 (CEST)
From: Cyrille Lefevre <clefevre@citeweb.net>
Reply-To: Cyrille Lefevre <clefevre@citeweb.net>
To: FreeBSD-gnats-submit@freebsd.org
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Subject: bin/20449: strange behaviour of sed 's/ */ /' w/ or w/o g
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>Number:         20449
>Category:       bin
>Synopsis:       strange behaviour of sed 's/ */ /' w/ or w/o g
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Aug 06 20:50:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     Cyrille Lefevre
>Release:        FreeBSD 4.1-RC i386
>Organization:
ACME
>Environment:

FreeBSD gits 4.1-RC FreeBSD 4.1-RC #0: Tue Jul 18 01:55:07 CEST 2000     root@gits:/disk2/4.0-stable/obj/disk2/4.0-stable/src/sys/CUSTOM  i386

>Description:

	well, sed(1) substitutions seems to be very buggy. see below.
	maybe it's regex(3), don't know yet.

>How-To-Repeat:

	$ echo 'a  string with  spaces' | sed 's/ */ /'
	 a  string with  spaces

	a space is prepended instead of replacing the first 2 spaces w/ one.

	$ echo 'a  string with  spaces' | sed 's/ */ /g'
	 a s t r i n g w i t h s p a c e s

	all empty strings are matched instead of matching spaces

	$ echo 'a  string with  spaces' | sed 's/g*/x/g'
	xax x xsxtxrxixnx xwxixtxhx x xsxpxaxcxexsx

	$ echo 'a  string with  spaces' | sed 's/z*/x/g'
	xax x xsxtxrxixnxgx xwxixtxhx x xsxpxaxcxexsx

	in fact, not only space substitutions are very buggy.

>Fix:

	n/a


>Release-Note:
>Audit-Trail:
>Unformatted:


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