Skip PAX global headers

Tar archives can contain set two kinds of PAX headers:
 - local headers that modify the attributes of the next file
 - global headers that set defaults for all files

The later is used "... not widely used", according to tar(5)
and has been deliberately not implemented.

Some programs (e.g. git-archive) *do* generate them (in the case
of git, it stores the commit hash).

This commit adds a code path that skips a PAX global header entirely
and resumes tar parsing, instead of erroneusly reporting it as an
entry.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/tar.h b/include/tar.h
index def36be..af3c9ab 100644
--- a/include/tar.h
+++ b/include/tar.h
@@ -105,6 +105,7 @@ typedef struct {
 #define TAR_TYPE_GNU_SPARSE 'S'
 
 #define TAR_TYPE_PAX 'x'
+#define TAR_TYPE_PAX_GLOBAL 'g'
 
 #define TAR_MAGIC "ustar"
 #define TAR_VERSION "00"