K 10
svn:author
V 6
emaste
K 8
svn:date
V 27
2015-04-09T13:45:17.324946Z
K 7
svn:log
V 765
ar: Disallow directory traversal

Set ARCHIVE_EXTRACT_SECURE_SYMLINKS and ARCHIVE_EXTRACT_SECURE_NODOTDOT
as in bsdtar to prevent extraction of archive entries whose pathnames
contain .. or whose target directory would be altered by a symlink.
Also disallow absolute pathnames.

We don't currently provide an option to disable this behaviour (as
bsdtar's -P does). It is unlikely to be a problem in practice for ar(1),
but the -P option is not currently used and available if we want to
consider it for this purpose.

Differential Revision:	https://reviews.freebsd.org/D1524
Reported by:	Alexander Cherepanov <cherepan@mccme.ru>
Approved by:	delphij
Obtained from:	ELF tool chain ar, Ticket #474
MFC after:	1 week
Relnotes:	Yes
Sponsored by:	The FreeBSD Foundation

END