Re: [PATCH 6/7] parse-opt: add PARSE_OPT_KEEP_ARGV0 parser option.

> This way, argv[0] isn't clobbered, to the cost of maybe not having a
> resulting NULL terminated argv array.
> 
> Signed-off-by: Pierre Habouzit <madcoder@debian.org>
> ---
>  parse-options.c |    7 ++++---
>  parse-options.h |    2 ++
>  2 files changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/parse-options.c b/parse-options.c
> index ee82cf3..a6b5e04 100644
> --- a/parse-options.c
> +++ b/parse-options.c
> @@ -246,7 +246,7 @@ void parse_options_start(struct parse_opt_ctx_t *ctx,
>  	memset(ctx, 0, sizeof(*ctx));
>  	ctx->argc = argc - 1;
>  	ctx->argv = argv + 1;
> -	ctx->out  = argv;
> +	ctx->out  = argv + ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
>  	ctx->flags = flags;
>  	strbuf_init(&ctx->buf, 0);
>  }
> @@ -327,10 +327,11 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
>  
>  int parse_options_end(struct parse_opt_ctx_t *ctx)
>  {
> +	int res = ctx->cpidx + ctx->argc;
>  	memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
> -	ctx->out[ctx->cpidx + ctx->argc] = NULL;
> +	ctx->out[res] = NULL;
>  	strbuf_release(&ctx->buf);
> -	return ctx->cpidx + ctx->argc;
> +	return res + ((ctx->flags & PARSE_OPT_KEEP_ARGV0) != 0);
>  }
>  
>  int parse_options(int argc, const char **argv, const struct option *options,
> diff --git a/parse-options.h b/parse-options.h
> index 14447d5..6745c7d 100644
> --- a/parse-options.h
> +++ b/parse-options.h
> @@ -22,6 +22,8 @@ enum parse_opt_type {
>  enum parse_opt_flags {
>  	PARSE_OPT_KEEP_DASHDASH = 1,
>  	PARSE_OPT_STOP_AT_NON_OPTION = 2,
> +	/* using that option, the filtered argv may not be NULL terminated */