Am 30.06.2014 15:43, schrieb Jeff King:
> On Sun, Jun 29, 2014 at 07:56:25AM +0200, René Scharfe wrote:
>
>> Avoid overrunning the existing pack name (p->pack_name, a C string) in
>> the case that the new path is longer by using strncmp instead of memcmp
>> for comparing. While at it, replace the magic constant 4 with a
>> strlen call to document its meaning.
>
> An unwritten assumption with this code is that we have "foo.idx" and we
> want to make sure that we are matching "foo.pack" from the existing pack
> list. Both before and after your patch, I think we would match
> "foobar.pack".
Yes, indeed.
> It's probably not a big deal, as we don't expect random
> junk in the pack directory, but I wonder if it would be better to be
> explicit, like:
<snip>
Here's a simpler approach:
-- >8 --
Subject: [PATCH v2 3/2] sha1_file: more precise packname matching
Consider the full length of the already loaded pack names when checking
for duplicates.
Signed-off-by: Rene Scharfe <l.s.r@xxxxxx>
---
sha1_file.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/sha1_file.c b/sha1_file.c
index b7ad6c1..a13fbbd 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1206,10 +1206,12 @@ static void prepare_packed_git_one(char *objdir, int local)
strbuf_addstr(&path, de->d_name);
if (has_extension(de->d_name, ".idx")) {
+ size_t len = path.len - strlen(".idx");
+
/* Don't reopen a pack we already have. */
for (p = packed_git; p; p = p->next) {
- if (!strncmp(path.buf, p->pack_name,
- path.len - strlen(".idx")))
+ if (!strncmp(p->pack_name, path.buf, len) &&
+ !strcmp(p->pack_name + len, ".pack"))
break;
}
if (p == NULL &&
--
2.0.0
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