misc/110530: sh cd updates current directory even when cd fails

[David Sanderson]

>Number:         110530
>Category:       misc
>Synopsis:       sh cd updates current directory even when cd fails
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Mar 19 19:30:03 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator:     David Sanderson
>Release:        6.2-RELEASE
>Organization:
Panasas
>Environment:
FreeBSD freebsd6 6.2-RELEASE FreeBSD 6.2-RELEASE #0: Fri Jan 12 11:05:30 UTC 2007     root at dessler.cse.buffalo.edu:/usr/obj/usr/src/sys/SMP  i386

>Description:
In sh on FreeBSD 6.2, a failed cd command updates the shell's
notion of the current directory as if the cd succeeded.

I tried this on a FreeBSD 4.3 system and the sh there did not
have this problem.  I'm not sure when the regression appeared.
>How-To-Repeat:
: freebsd6; cd /
: freebsd6; cd /tmp
: freebsd6; env | grep PWD
OLDPWD=/
PWD=/tmp
: freebsd6; pwd
/tmp
: freebsd6; cd /var/crash
cd: can't cd to /var/crash
: freebsd6; pwd
/var/crash                            <-- this is incorrect
: freebsd6; env | grep PWD
OLDPWD=/tmp
PWD=/var/crash
: freebsd6; /bin/pwd
/tmp                                  <-- /bin/pwd is correct
: freebsd6; echo $0
-sh

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: