Re: [PATCH] findprog-in: Set errno to indicate why NULL was returned.

[Eli Zaretskii]

> From: Bruno Haible <address@hidden>
> Cc: Paul Smith <address@hidden>
> Date: Sun, 15 Sep 2019 19:58:56 +0200
> 
> +   - Otherwise, it sets errno and returns NULL.
> +     Specific errno values include:
> +       - ENOENT: means that the program's file was not found.
> +       - EACCESS: means that the program's file was found but lacks the
> +         execute permissions.

The value of EACCES (not EACCESS!) on MS-Windows frequently means the
file cannot be accessed for a reason that has nothing to do with
execute permissions.  It could be, for example, that some intermediate
directory in the full file name doesn't exist or is otherwise
inaccessible.