On Mon, Sep 25, 2017 at 03:14:26PM -0700, Jonathan Nieder wrote:
> > diff --git a/builtin/worktree.c b/builtin/worktree.c
> > index 2f4a4ef9cd..87b3d70b0b 100644
> > --- a/builtin/worktree.c
> > +++ b/builtin/worktree.c
> > @@ -59,7 +59,11 @@ static int prune_worktree(const char *id, struct strbuf *reason)
> > }
> > len = xsize_t(st.st_size);
> > path = xmallocz(len);
> > - read_in_full(fd, path, len);
> > + if (read_in_full(fd, path, len) != len) {
> > + strbuf_addf(reason, _("Removing worktrees/%s: gitdir read did not match stat (%s)"),
> > + id, strerror(errno));
>
> I'm a little confused. The 'if' condition checks for a read error but
> the message says something about 'stat'.
>
> If we're trying to double-check the 'stat' result, shouldn't we read
> all the way to EOF in case the file got longer?
If you wanted to really double-check the stat result, yes you'd want to
make sure there aren't extra bytes either. But really we're just making
sure we were able to read _enough_ bytes.
To be honest, I'm tempted to rip out the whole thing and replace it with
strbuf_read_file(), which seems more straightforward.
The function does seem to rely on the stat() to get the mtime, so we'd
have to leave that part in.
-Peff
