misc/157543: pkg_add fails to install with -C from bad path

[David Naylor]

>Number:         157543
>Category:       misc
>Synopsis:       pkg_add fails to install with -C from bad path
>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:   Thu Jun 02 20:30:13 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     David Naylor
>Release:        9.0-CURRENT
>Organization:
Private
>Environment:
FreeBSD dragon.dg 9.0-CURRENT FreeBSD 9.0-CURRENT #0: Sat May 21 22:12:29 SAST 2011
>Description:
pkg_add appears to chdir back to its calling directory after installed the package.  When installing into a chroot that directory may not exist in the chroot and pkg_add fails.
>How-To-Repeat:
# mkdir /does/not/exist/in/scratchpad
# cd /does/not/exist/in/scratchpad
# pkg_add -C /scratchpad/pkg_env /usr/ports/packages/All/perl-threaded-5.12.3.txz

Removing stale symlinks from /usr/bin...
    Removing /usr/bin/perl
    Removing /usr/bin/perl5
Done.
Creating various symlinks in /usr/bin...
    Symlinking /usr/local/bin/perl5.12.3 to /usr/bin/perl
    Symlinking /usr/local/bin/perl5.12.3 to /usr/bin/perl5
Done.
Cleaning up /etc/make.conf... Done.
Spamming /etc/make.conf... Done.
pkg_add: leave_playpen: can't chdir back to ''
# echo $?
2
>Fix:
Use `chroot /scratchpad/pkg_env pkg_add ...` or start pkg_add from a directory that exists in the chroot environment.

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