diff options
| -rw-r--r-- | sha1_file.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sha1_file.c b/sha1_file.c index 04f7f94d2..5f34c69d3 100644 --- a/sha1_file.c +++ b/sha1_file.c @@ -463,6 +463,7 @@ int use_packed_git(struct packed_git *p) int fd; struct stat st; void *map; + struct pack_header *hdr; pack_mapped += p->pack_size; while (PACK_MAX_SZ < pack_mapped && unuse_one_packed_git()) @@ -482,6 +483,17 @@ int use_packed_git(struct packed_git *p) die("packfile %s cannot be mapped.", p->pack_name); p->pack_base = map; + /* Check if we understand this pack file. If we don't we're + * likely too old to handle it. + */ + hdr = map; + if (hdr->hdr_signature != htonl(PACK_SIGNATURE)) + die("packfile %s isn't actually a pack.", p->pack_name); + if (!pack_version_ok(hdr->hdr_version)) + die("packfile %s is version %i and not supported" + " (try upgrading GIT to a newer version)", + p->pack_name, ntohl(hdr->hdr_version)); + /* Check if the pack file matches with the index file. * this is cheap. */ |