pack-objects: use fixup_pack_header_footer()'s validation mode

When limiting the pack size, a new header has to be written to the
pack and a new SHA1 computed.  Make sure that the SHA1 of what is being
read back matches the SHA1 of what was written.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c
index 501f9367cb81b3eacce6ef0499a0d0858c6a2843..a02c673fb7b6a50278b632e6bd127dac0d03168a 100644 (file)
--- a/builtin-pack-objects.c
+++ b/builtin-pack-objects.c
@@ -492,9 +492,9 @@ static void write_pack_file(void)
                } else if (nr_written == nr_remaining) {
                        sha1close(f, sha1, CSUM_FSYNC);
                } else {
-                       int fd = sha1close(f, NULL, 0);
+                       int fd = sha1close(f, sha1, 0);
                        fixup_pack_header_footer(fd, sha1, pack_tmp_name,
-                                                nr_written, NULL, 0);
+                                                nr_written, sha1, offset);
                        close(fd);
                }
 

diff --git a/csum-file.c b/csum-file.c
index ace64f165e4a01fb99892e9b89e7df791a7f4ca1..28389541a32454f2d988bb02e4268ffe12755bbc 100644 (file)
--- a/csum-file.c
+++ b/csum-file.c
@@ -42,11 +42,11 @@ int sha1close(struct sha1file *f, unsigned char *result, unsigned int flags)
                sha1flush(f, offset);
                f->offset = 0;
        }
+       SHA1_Final(f->buffer, &f->ctx);
+       if (result)
+               hashcpy(result, f->buffer);
        if (flags & (CSUM_CLOSE | CSUM_FSYNC)) {
                /* write checksum and close fd */
-               SHA1_Final(f->buffer, &f->ctx);
-               if (result)
-                       hashcpy(result, f->buffer);
                sha1flush(f, 20);
                if (flags & CSUM_FSYNC)
                        fsync_or_die(f->fd, f->name);