From: Alex Riesen <raa.lkml@gmail.com>
Date: Wed, 29 Apr 2009 21:50:20 GMT
Subject: Re: [PATCH v2] diff -c -p: do not die on submodules
Message-ID: <81b0412b0904291450w3d292ed5i3b2ab5164c0ae0f4@mail.gmail.com>
In-Reply-To: <7vy6tj8aur.fsf_-_@gitster.siamese.dyndns.org>

2009/4/29 Junio C Hamano <gitster@pobox.com>:
> +
> +       if (S_ISGITLINK(mode)) {
> +               blob = xmalloc(100);
> +               *size = snprintf(blob, 100,
> +                                "Subproject commit %s\n", sha1_to_hex(sha1));

snprintf returns a signed value. It also has a bad record of returning
negative values for obscure reasons (on obscure platforms, admittedly).

For this particular case,

  strcpy(blob, "Subproject commit ");
  strcat(blob, sha1_to_hex(sha1));
  strcat(blob, "\n");
  *size = strlen(blob); /* that's a constant */

could be considered.