Bug 1298499

Summary:	q command does not immediately quit
Product:	[Fedora] Fedora	Reporter:	Robin Green <greenrd>
Component:	sed	Assignee:	Petr Stodulka <pstodulk>
Status:	CLOSED WORKSFORME	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	23	CC:	hhorak, jpacner, pbonzini, pstodulk
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-07-07 15:34:02 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Robin Green 2016-01-14 09:42:40 UTC

Description of problem:
The info page for sed says that the q command immediately quits. However, it doesn't.

Version-Release number of selected component (if applicable):
sed-4.2.2-11.fc23.x86_64

How reproducible:
Always

Steps to Reproduce:
(echo 'PostgreSQL init process complete; ready for start up.'; sleep 3; echo foo)|sed -n -e '/PostgreSQL init process complete/q'

Actual results:
Output is correct (no output) but it takes 3 seconds

Expected results:
Should return instantly

Additional info:
Same bug happens with Q, or Q 1

Comment 1 Paolo Bonzini 2016-07-07 15:34:02 UTC

sed does quit immediately, but the shell doesn't exit until the whole pipeline is done.  Try this:

$ (echo 'PostgreSQL init process complete; ready for start up.'; sleep 3;
     echo foo)|(sed -n -e '/PostgreSQL init process complete/q'; echo bar)

And you'll see that "bar" is printed immediately.