On Mon, Aug 3, 2015 at 8:16 PM, Ben Boeckel <maths...@gmail.com> wrote:
> On Mon, Aug 03, 2015 at 19:38:15 -0400, Eric Sunshine wrote:
>> On Mon, Aug 3, 2015 at 5:00 PM, Ben Boeckel <maths...@gmail.com> wrote:
>> > + argc = parse_options(argc, argv, NULL, options,
>> > builtin_remote_geturl_usage,
>> > + PARSE_OPT_KEEP_ARGV0);
>>
>> What is the reason for PARSE_OPT_KEEP_ARGV0 in this case?
>
> Copied from get-url; I presume for more natural argv[] usage within the
> function.
>
>> > + if (argc < 1 || argc > 2)
>> > + usage_with_options(builtin_remote_geturl_usage, options);
>>
>> So, 'argc' must be 1 or 2, which in 'argv' terms is argv[0] and argv[1]).
>>
>> > + remotename = argv[1];
>>
>> But here, argv[1] is accessed unconditionally, even though 'argc' may
>> have been 1, thus out of bounds.
>
> Yep, should be (argc < 2 || argc > 2) (or 1 if PARSE_OPT_KEEP_ARGV0 is
> removed). Off-by-one when converting from get-url.
Or, expressed more naturally:
if (argc != 1)
usage_with_options(...);
assuming the unnecessary PARSE_OPT_KEEP_ARGV0 is dropped.
> I'll reroll tomorrow morning in case there are more comments until then
> (particularly about PARSE_OPT_KEEP_ARGV0).
This new code doesn't take advantage of it, and it's very rarely used
in Git itself, thus its use here is a potential source of confusion,
so it's probably best to drop it. (The same could be said for
set_url(), but that's a separate topic.)
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