Re: [RFC PATCH] builtin-apply: prevent non-explicit permission changes

[Junio C Hamano <gitster@pobox.com>]

Alexander Potashev <aspotashev@gmail.com> writes:

>  builtin-apply.c |    3 ++-
>  1 files changed, 2 insertions(+), 1 deletions(-)
>
> diff --git a/builtin-apply.c b/builtin-apply.c
> index 07244b0..071f6d8 100644
> --- a/builtin-apply.c
> +++ b/builtin-apply.c
> @@ -630,7 +630,7 @@ static int gitdiff_index(const char *line, struct patch *patch)
>  	memcpy(patch->new_sha1_prefix, line, len);
>  	patch->new_sha1_prefix[len] = 0;
>  	if (*ptr == ' ')
> -		patch->new_mode = patch->old_mode = strtoul(ptr+1, NULL, 8);
> +		patch->old_mode = strtoul(ptr+1, NULL, 8);
>  	return 0;
>  }
>  
> @@ -2447,6 +2447,7 @@ static int check_preimage(struct patch *patch, struct cache_entry **ce, struct s
>  	if (st_mode != patch->old_mode)
>  		fprintf(stderr, "warning: %s has type %o, expected %o\n",
>  			old_name, st_mode, patch->old_mode);
> +	patch->new_mode = st_mode;

Can you do this unconditionally, overwriting whatever we read from the
patch header metainfo lines?