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

David Sanderson dsanderson at panasas.com
Mon Mar 19 19:30:04 UTC 2007

>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
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Mar 19 19:30:03 GMT 2007
>Originator:     David Sanderson
>Release:        6.2-RELEASE
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

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.
: freebsd6; cd /
: freebsd6; cd /tmp
: freebsd6; env | grep PWD
: freebsd6; pwd
: freebsd6; cd /var/crash
cd: can't cd to /var/crash
: freebsd6; pwd
/var/crash                            <-- this is incorrect
: freebsd6; env | grep PWD
: freebsd6; /bin/pwd
/tmp                                  <-- /bin/pwd is correct
: freebsd6; echo $0



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