From: Junio C Hamano <gitster@pobox.com>
Date: Tue, 02 Oct 2012 19:59:58 GMT
Subject: Re: [PATCH] run-command: don't try to execute directories
Message-ID: <7vd3107igx.fsf@alter.siamese.dyndns.org>
In-Reply-To: <87bogkisas.fsf@centaur.cmartin.tk>

cmn@elego.de (Carlos Martín Nieto) writes:

> How about something like this instead? We keep the access check and only
> do the stat call when we have found something we want to look at.

Sounds safer.

Looking at the way the stat call is indented twice, I suspect that
the variable can be defined inner scope, not at the top-level of the
function?

>
> ---8<---
>
> diff --git a/run-command.c b/run-command.c
> index 1101ef7..fb8a93c 100644
> --- a/run-command.c
> +++ b/run-command.c
> @@ -85,6 +85,7 @@ static char *locate_in_PATH(const char *file)
>  {
>         const char *p = getenv("PATH");
>         struct strbuf buf = STRBUF_INIT;
> +       struct stat st;
>  
>         if (!p || !*p)
>                 return NULL;
> @@ -101,7 +102,8 @@ static char *locate_in_PATH(const char *file)
>                 }
>                 strbuf_addstr(&buf, file);
>  
> -               if (!access(buf.buf, F_OK))
> +               if (!access(buf.buf, F_OK) &&
> +                   !stat(buf.buf, &st) && !S_ISDIR(st.st_mode))
>                         return strbuf_detach(&buf, NULL);
>  
>                 if (!*end)