Bug 112952 – sed 4.0.8 and t command

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Bug 112952 - sed 4.0.8 and t command

Summary:	sed 4.0.8 and t command

Status:	CLOSED RAWHIDE

Aliases:	None

Product:	Fedora
Classification:	Fedora
Component:	sed (Show other bugs)
Sub Component:
Version:	1
Hardware:	i686 Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Jakub Jelinek
QA Contact:	Ben Levenson
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2004-01-06 11:43 EST by Derrien
Modified:	2007-11-30 17:10 EST (History)
CC List:	0 users

See Also:
Fixed In Version:	4.0.8-3
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2004-01-07 09:47:52 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Description Derrien 2004-01-06 11:43:15 EST

Description of problem:

On RH 9 with sed 4.0.5 :

echo "a
b" | sed '{:bcl;N;s/\n/ /;t bcl}'

gives : 
a b

On FC 1 with sed 4.0.8

echo "a
b" | sed '{:bcl;N;s/\n/ /;t bcl}'

gives nothing

So what ?




Version-Release number of selected component (if applicable):
sed-4.0.8-2

How reproducible:
Always

Steps to Reproduce:
1.Cf description
2.
3.
    

Additional info:

Comment 1 Jakub Jelinek 2004-01-06 18:00:09 EST

My understanding of
http://www.opengroup.org/onlinepubs/007904975/utilities/sed.html
is that the latter behaviour is correct.
"If no next line of input is available, the N command verb shall branch to the end of the script and quit without
starting a new cycle or copying the pattern space to standard output."

Comment 2 Derrien 2004-01-07 07:57:36 EST

From /usr/share/doc/sed-4.0.8/BUGS :

* NON-BUGS
...
`N' command on the last line

  Most versions of sed exit without printing anything when the `N'
  command is issued on the last line of a file.  GNU sed instead
  prints pattern space before exiting unless of course the `-n'
  command switch has been specified.  More information on the reason
  behind this choice can be found in the Info manual.

Comment 3 Jakub Jelinek 2004-01-07 09:47:52 EST

Paolo Bonzini (sed maintainer) provided a patch which restores the
old N behaviour unless POSIXLY_CORRECT is set in the environment.
The patch is included in sed-4.0.8-3 in rawhide.

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