Fix processing of tar mtime on 32 bit systems

struct stat uses time_t to store time values. On some 32 bit systems,
this may be a 32 bit integer.

This patch adds a broken-out 64 bit time value to tar_header_decoded_t
and makes sure to clamp the value to +/- (2^32 - 1) if required when
writing it back to a struct stat.

Reported-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/tar.h b/include/tar.h
index 5ac0763..e6a506a 100644
--- a/include/tar.h
+++ b/include/tar.h
@@ -74,6 +74,10 @@ typedef struct {
 	uint64_t record_size;
 	bool unknown_record;
 	tar_xattr_t *xattr;
+
+	/* broken out since struct stat could contain
+	   32 bit values on 32 bit systems. */
+	int64_t mtime;
 } tar_header_decoded_t;
 
 #define TAR_TYPE_FILE '0'