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Date: Mon, 16 Sep 2019 18:18:11 +0300
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From: Eli Zaretskii <eliz@gnu.org>
To: Bruno Haible <bruno@clisp.org>
In-reply-to: <5307069.QXIAngi7cb@omega> (message from Bruno Haible on Sun, 15
 Sep 2019 19:58:56 +0200)
Subject: Re: [PATCH] findprog-in: Set errno to indicate why NULL was returned.
References: <20190914193516.21375-1-psmith@gnu.org> <5307069.QXIAngi7cb@omega>
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> From: Bruno Haible <bruno@clisp.org>
> Cc: Paul Smith <psmith@gnu.org>
> 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.