Date: Tue, 26 Aug 2008 08:56:08 GMT From: Etienne <na.eb.ml@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/126849: tar -x -P doesn't follow symlinks that already exist in target location Message-ID: <200808260856.m7Q8u8SF060396@www.freebsd.org> Resent-Message-ID: <200808260900.m7Q90Ckk084918@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
>Number: 126849
>Category: misc
>Synopsis: tar -x -P doesn't follow symlinks that already exist in target location
>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: Tue Aug 26 09:00:11 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator: Etienne
>Release: FreeBSD 6.3-RELEASE
>Organization:
NETASQ
>Environment:
FreeBSD jcd.localhost 6.3-RELEASE FreeBSD 6.3-RELEASE #1: Thu Aug 7 16:37:14 CEST 2008 root@jcd.localhost:/usr/obj/usr/src/sys/SMP i386
>Description:
When extracting an archive, the -P option behavior of bsdtar differs on FreeBSD 6.2 and FreeBSD 6.3 :
when an archive containing "dir/file" is extracted somewhere "dir" already exists as a symlink to another location,
- on FreeBSD 6.2, "dir" is left as a symlink and "file" is extracted into the target directory of the symlink (that is the behavior of gnu tar too)
- on FreeBSD 6.3, "dir" is overwritten and contains "file" (there is no more symlink)
The problem still exists with bsdtar 2.5.5 - libarchive 2.5.5
>How-To-Repeat:
# create a tar file
mkdir dir
touch dir/file
tar cf test.tar dir
# remove files
rm -fr dir
#create a link
mkdir real_dir
ln -s real_dir dir
#untar
tar xPf test.tar
Results depending on FreeBSD versions :
FreeBSD 6.2 FreeBSD 6.3
. | .
|-- dir -> real_dir | |-- dir
`-- real_dir | | `-- file
`-- file | `-- real_dir
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200808260856.m7Q8u8SF060396>