Since GNU tar fails to extract files with xattrs preserved when
Integrity Measurement Architecture (IMA) is enabled some vendors
may choose to install libarchive-based tar (bsdtar) on their embedded
devices, so the swupd server needs to be able to create archives
in its format.
This patch adds one compile-time options --enable-bsdtar that is used
to enable/disable GNU tar specific options. Also it harmonizes
the command strings to be compatible with both GNU tar and bsdtar.
Particularly it
- changes --exclude pattern from '%s'/* to more explicit '%s/?*' because
bsdtar's pattern matching is greedier than in tar: it uses tcsh's
globbing where '*' can be anything including the null string and the
original pattern would include the directory itself;
- OS file names are escaped with leading ./ to avoid collisions with
file names starting with @ which has special meaning in bsdtar.
Signed-off-by: Dmitry Rozhkov <dmitry.rozhkov@linux.intel.com>
Dmitry Rozhkov