On Tue, Mar 05, 2024 at 04:30:18PM -0600, Justin Tobler wrote:
> On 24/03/04 12:10PM, Patrick Steinhardt wrote:
> > We do not register new tables which we're about to add to the stack with
> > the tempfile API. Those tables will thus not be deleted in case Git gets
> > killed.
> >
> > Refactor the code to register tables as tempfiles.
> >
> > Signed-off-by: Patrick Steinhardt <ps@xxxxxx>
> > ---
> > reftable/stack.c | 29 ++++++++++++-----------------
> > 1 file changed, 12 insertions(+), 17 deletions(-)
> >
> > diff --git a/reftable/stack.c b/reftable/stack.c
> > index b64e55648a..81544fbfa0 100644
> > --- a/reftable/stack.c
> > +++ b/reftable/stack.c
> > @@ -737,8 +737,9 @@ int reftable_addition_add(struct reftable_addition *add,
> > struct strbuf tab_file_name = STRBUF_INIT;
> > struct strbuf next_name = STRBUF_INIT;
> > struct reftable_writer *wr = NULL;
> > + struct tempfile *tab_file = NULL;
> > int err = 0;
> > - int tab_fd = 0;
> > + int tab_fd;
> >
> > strbuf_reset(&next_name);
> > format_name(&next_name, add->next_update_index, add->next_update_index);
> > @@ -746,17 +747,20 @@ int reftable_addition_add(struct reftable_addition *add,
> > stack_filename(&temp_tab_file_name, add->stack, next_name.buf);
> > strbuf_addstr(&temp_tab_file_name, ".temp.XXXXXX");
> >
> > - tab_fd = mkstemp(temp_tab_file_name.buf);
> > - if (tab_fd < 0) {
> > + tab_file = mks_tempfile(temp_tab_file_name.buf);
> > + if (!tab_file) {
> > err = REFTABLE_IO_ERROR;
> > goto done;
> > }
> > if (add->stack->config.default_permissions) {
> > - if (chmod(temp_tab_file_name.buf, add->stack->config.default_permissions)) {
> > + if (chmod(get_tempfile_path(tab_file),
> > + add->stack->config.default_permissions)) {
> > err = REFTABLE_IO_ERROR;
> > goto done;
> > }
> > }
>
> Since the tempfile is now being created through the tempfile API, I
> think the file mode can be set directly through `mks_tempfile_m()`
> instead of creating the tempfile and then using chmod. Just something I
> thought to mention.
Unfortunately not. The problem is that `mks_tempfile_m()` will munge
passed-in permissions via "core.sharedRepository", but we already pre
calculated the target mode in `config.default_permissions`. Thus, the
result would have wrong permissions if we used `mks_tempfile_m()`.
Patrick
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