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-rw-r--r--sha1_file.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/sha1_file.c b/sha1_file.c
index 592226eb7b..2be1afdde0 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -671,13 +671,15 @@ static int check_packed_git_idx(const char *path, struct packed_git *p)
int open_pack_index(struct packed_git *p)
{
char *idx_name;
+ size_t len;
int ret;
if (p->index_data)
return 0;
- idx_name = xstrdup(p->pack_name);
- strcpy(idx_name + strlen(idx_name) - strlen(".pack"), ".idx");
+ if (!strip_suffix(p->pack_name, ".pack", &len))
+ die("BUG: pack_name does not end in .pack");
+ idx_name = xstrfmt("%.*s.idx", (int)len, p->pack_name);
ret = check_packed_git_idx(idx_name, p);
free(idx_name);
return ret;