Bug 495435

Summary:	exec "init 7" and the tty will hang
Product:	Red Hat Enterprise Linux 5	Reporter:	Yunlin Fang <cst05001>
Component:	SysVinit	Assignee:	Bill Nottingham <notting>
Status:	CLOSED NOTABUG	QA Contact:	BaseOS QE <qe-baseos-auto>
Severity:	medium	Docs Contact:
Priority:	low
Version:	5.3	CC:	afang, rvokal
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-04-14 17:27:36 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Yunlin Fang 2009-04-13 06:37:29 UTC

Description of problem:


Version-Release number of selected component (if applicable):
Red Hat Enterprise Linux 5.2 and 5.3

How reproducible:
run a terminal at tty 1 -6 or X11, not ssh and other remote login.
and exec command "init 7",
then you will see system hang here.
tty 1- 7 stop. 
you can not press anything, but server still run. you can ssh to the server.


Steps to Reproduce:
1.run command: init 7
2.
3.
  
Actual results:
system hang

Expected results:
init tell no this runlevel and quit.

Additional info:

init will stop the tty that current runlevel opened， then open the tty that new runlevel setted .
/etc/inittab has no information about runlevel 7 8 9，so after you exec runlevel 7 8 9，system will stop the tty current level open， but do nothing action to init the new runlevel's tty.


I think you kan add a "if" to check the new runlevel wether is setting, if no, tell user and quit.

Comment 1 Bill Nottingham 2009-04-14 17:27:36 UTC

7-9 are valid runlevels as far as init is concerned; if there's nothing configured for them, it will run nothing.

Comment 2 Yunlin Fang 2009-04-15 01:25:04 UTC

(In reply to comment #1)
> 7-9 are valid runlevels as far as init is concerned; if there's nothing
> configured for them, it will run nothing.  

==
I don't think so.
I try it on my computer,
tty 1 to 7 will stop.(Like hang)
But other like service , network still OK .

Comment 3 Bill Nottingham 2009-04-15 15:31:41 UTC

Correct, because there's nothing that says network should be stopped in runlevel 7.