Bug 223960

Summary: .bash_logout should invoke /usr/bin/clear
Product: [Fedora] Fedora Reporter: Ralf Corsepius <rc040203>
Component: bashAssignee: Tim Waugh <twaugh>
Status: CLOSED RAWHIDE QA Contact: Ben Levenson <benl>
Severity: medium Docs Contact:
Priority: medium    
Version: 6CC: susi.lehtola
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Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: 3.2-4.fc7 Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2007-01-23 11:38:25 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Ralf Corsepius 2007-01-23 11:04:37 UTC
Description of problem:
/etc/skel/.bash_logout invokes "clear"

i.e. "clear" is being searched on $PATH.
This breaks if users screw up their $PATH. 

IMO, this should be /usr/bin/clear instead.

Version-Release number of selected component (if applicable):
bash-3.1-16.1

How reproducible:
Deterministic.

Steps to Reproduce:
1. copy /etc/skel/.bash_logout to $(HOME):
cp /etc/skel/.bash_logout ~

2. Break your $PATH, e.g.
export PATH=/foo/bar:PATH
[A classical typo users trip into when modifying $PATH]

3. logout:
exit
  
Actual results:
> exit
logout
-bash: clear: command not found

Expected results:
Function.

Additional info:
IMO, this also is a security leak. "clear" is a too common name to search for on
$PATH.

Comment 1 Susi Lehtola 2009-03-23 19:19:52 UTC
(In reply to comment #0)
> Additional info:
> IMO, this also is a security leak. "clear" is a too common name to search for on
> $PATH.  

You're right. Even though we can (hopefully) make sure no other package in Fedora has executables named 'clear', there's no guarantee that users don't have such things in their $PATH.

However, not clearing the screen is also a bit of a security risk; I for instance am very satisfied with the screen clearing behaviour of Fedora.