On Wed, Nov 29, 2023 at 09:14:16AM +0100, Patrick Steinhardt wrote: > diff --git a/refs.c b/refs.c > index fcae5dddc6..7d4a057f36 100644 > --- a/refs.c > +++ b/refs.c > @@ -1806,8 +1806,12 @@ static int refs_read_special_head(struct ref_store *ref_store, > int result = -1; > strbuf_addf(&full_path, "%s/%s", ref_store->gitdir, refname); > > - if (strbuf_read_file(&content, full_path.buf, 0) < 0) > + errno = 0; Do we need to set errno to 0 here? Looking at the implementation of strbuf_read_file(), it looks like we return early in two cases. Either open() fails, in which errno is set for us, or strbuf_read() fails, in which case we set errno to whatever it was right after the failed read (preventing the subsequent close() call from tainting the value of errno). So I think in either case, we have the right value in errno, and don't need to worry about setting it to "0" ahead of time. > +test_expect_success '--exists with existing special ref' ' > + git rev-parse HEAD >.git/FETCH_HEAD && > + git show-ref --exists FETCH_HEAD > +' I don't think that it matters here, but do we need to worry about cleaning up .git/FETCH_HEAD for future tests? Thanks, Taylor
