Rafał Mużyło <galtgendo@xxxxxxxxx> writes: > I just stumbled upon this while checking a few mailing lists. > I haven't found any mails about in in the archives yet, so I assume, that > no mail have been written yet. > > The problem is described here: > http://sourceforge.net/projects/sevenzip/forums/forum/45798/topic/5322604 Thanks. It sounds a bit more than "slight inconvenience" to me ;-) -- >8 -- Date: Wed, 13 Jun 2012 10:42:25 -0700 Subject: [PATCH] archive: ustar header checksum is computed unsigned POSIX.1 (pax) is pretty clear on this: The chksum field shall be the ISO/IEC 646:1991 standard IRV representation of the octal value of the simple sum of all octets in the header logical record. Each octet in the header shall be treated as an unsigned value. These values shall be added to an unsigned integer, initialized to zero, the precision of which is not less than 17 bits. When calculating the checksum, the chksum field is treated as if it were all <space> characters. so is GNU: http://www.gnu.org/software/tar/manual/html_node/Checksumming.html Found by 7zip folks and reported by Rafał Mużyło. Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx> --- archive-tar.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/archive-tar.c b/archive-tar.c index dc91c6b..0ba3f25 100644 --- a/archive-tar.c +++ b/archive-tar.c @@ -139,13 +139,13 @@ static void strbuf_append_ext_header(struct strbuf *sb, const char *keyword, static unsigned int ustar_header_chksum(const struct ustar_header *header) { - const char *p = (const char *)header; + const unsigned char *p = (const unsigned char *)header; unsigned int chksum = 0; - while (p < header->chksum) + while (p < (const unsigned char *)header->chksum) chksum += *p++; chksum += sizeof(header->chksum) * ' '; p += sizeof(header->chksum); - while (p < (const char *)header + sizeof(struct ustar_header)) + while (p < (const unsigned char *)header + sizeof(struct ustar_header)) chksum += *p++; return chksum; } -- 1.7.11.rc3.25.g4c2075b -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html