1 files changed, 3 insertions, 0 deletions

diff --git a/archival/tar.c b/archival/tar.c
index 1cdae296d..992128ef4 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -173,6 +173,9 @@ static void putOctal(char *cp, int len, off_t value)
 
 static void chksum_and_xwrite(int fd, struct TarHeader* hp)
 {
+        /* POSIX says that checksum is done on unsigned bytes
+         * (Sun and HP-UX fucked it up... more details in
+         * GNU tar source) */
         const unsigned char *cp;
         int chksum, size;