Bug 15755

Summary:	ctrl-C does not work in runlevel s
Product:	[Retired] Red Hat Linux	Reporter:	Rene Uittenbogaard <ruittenbogaard>
Component:	sh-utils	Assignee:	Bernhard Rosenkraenzer <bero>
Status:	CLOSED RAWHIDE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	7.0
Target Milestone:	---
Target Release:	---
Hardware:	i686
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2001-02-19 14:58:05 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 Rene Uittenbogaard 2000-08-08 19:08:04 UTC

When the system is brought down to single-user mode, the only working
virtual console does not allow any command to be ended by control-C. The
following settings have been set:

speed 38400 baud; rows 25; columns 80; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W;
lnext = ^V; flush = ^O; min = 1; time = 0;
-parenb -parodd cs8 hupcl -cstopb cread -clocal -crtscts
-ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon
-ixoff
-iuclc -ixany -imaxbel
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0
ff0
isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt
echoctl echoke

Comment 1 Jeff Johnson 2001-01-06 19:37:06 UTC

This appears to be a problem with shell startup after switching to single user
mode.

How are you getting to single user mode? What's needed is to set ^C in the
profile
used by the shell that's run when you end up in single user mode.

Comment 2 Rene Uittenbogaard 2001-01-08 12:22:50 UTC

Adding the line "stty intr ^C" in /root/.bashrc does not help.
However, a long time ago the following customisation has been made to
/etc/inittab:

ss:S:once:/sbin/sulogin

removing / commenting out this line solves the problem.  However, as a security
measure, I don't want to remove it. Also, in /etc/rc.sysinit, sulogin is used,
which means ctrl-C cannot be used in an emergency shell. Is it possible to
consider this bugreport as a bug in sulogin?

Comment 3 Rene Uittenbogaard 2001-02-19 14:55:23 UTC

The problem is still present in RH7.0 with the same customisation. Will you have
a look at this problem again please?

Comment 4 Bernhard Rosenkraenzer 2001-03-06 15:17:17 UTC

I can't reproduce this with the current version (from rawhide).