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Date: Wed, 31 Jan 2001 18:11:00 -0800 (PST)
From: larse@isi.edu
To: freebsd-gnats-submit@FreeBSD.org
Subject: tcsh: broken handling of comment in first line of shell script
X-Send-Pr-Version: www-1.0

>Number:         24769
>Category:       bin
>Synopsis:       tcsh: broken handling of comment in first line of shell script
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jan 31 18:20:01 PST 2001
>Closed-Date:    Fri Mar 23 15:48:33 PST 2001
>Last-Modified:  Fri Mar 23 15:50:05 PST 2001
>Originator:     Lars Eggert
>Release:        4.2-RELEASE
>Organization:
>Environment:
FreeBSD hbo.isi.edu 4.2-RELEASE FreeBSD 4.2-RELEASE #0: Wed Jan 31 02:09:17 PST 2001     root@hbo.isi.edu:/usr/src/sys/compile/KERNEL-1.12  i386

>Description:
Tcsh has a bug in 4.2-RELEASE when the first line of a shell script
(which can contain the command interpreter, specified by #!) contains
a comment that is not a valid command interpreter.

In that case, tcsh will try to use the (non-existing) binary
/usr/obj/usr/src/i386/bin/csh (which looks like it got hardwired during
the 4.2 release buildworld).
>How-To-Repeat:
The following shell script demonstrates the problem:

--snip--
# comment
echo bar
--snip--

[larse@hbo: ~] echo "# comment\necho bar" > bug && chmod +x bug && ./bug
/usr/obj/usr/src/i386/bin/csh: No such file or directory.


>Fix:
Workaround: Don't put a comment in the first line of a shell script.


>Release-Note:
>Audit-Trail:

From: Lars Eggert <larse@ISI.EDU>
To: freebsd-gnats-submit@FreeBSD.org, larse@ISI.EDU
Cc:  
Subject: Re: bin/24769: tcsh: broken handling of comment in first line of shell 
 script
Date: Wed, 31 Jan 2001 18:50:19 -0800

 This is a cryptographically signed message in MIME format.
 
 --------------msA6B8A433414FF3E7B229577A
 Content-Type: text/plain; charset=us-ascii
 Content-Transfer-Encoding: 7bit
 
 Snooping around the CVS tree, it seems this problem has been fixed in
 -CURRENT with this patch:
 http://www.FreeBSD.org/cgi/cvsweb.cgi/src/bin/csh/Makefile.diff?r1=1.21&r2=1.22
 
 Will this be MFC'ed anytime soon?
 -- 
 Lars Eggert <larse@isi.edu>                 Information Sciences Institute
 http://www.isi.edu/larse/                University of Southern California
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 --------------msA6B8A433414FF3E7B229577A--
 
 
State-Changed-From-To: open->closed 
State-Changed-By: mpp 
State-Changed-When: Fri Mar 23 15:48:33 PST 2001 
State-Changed-Why:  
This problem was fixed in -current in rev 1.22, and in -stable 
in rev 1.11.2.5 on 3/4/01. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=24769 
>Unformatted:
