From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id 152ab574 for ; Wed, 23 Oct 2019 05:48:36 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id 599DB9BC7B; Wed, 23 Oct 2019 15:48:35 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 5AFC99B53F; Wed, 23 Oct 2019 15:48:09 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 7C8669B53F; Wed, 23 Oct 2019 15:48:06 +1000 (AEST) Received: from junk.nocrew.org (junk.nocrew.org [51.15.56.219]) by minnie.tuhs.org (Postfix) with ESMTPS id 1C2B093D06 for ; Wed, 23 Oct 2019 15:48:06 +1000 (AEST) Received: from localhost ([127.0.0.1] helo=junk.nocrew.org) by junk.nocrew.org with esmtp (Exim 4.86_2) (envelope-from ) id 1iN9V6-0000fy-H2; Wed, 23 Oct 2019 05:48:04 +0000 From: Lars Brinkhoff To: Angelo Papenhoff Organization: nocrew References: <20191021062242.GA91599@indra.papnet.eu> Date: Wed, 23 Oct 2019 05:48:04 +0000 In-Reply-To: <20191021062242.GA91599@indra.papnet.eu> (Angelo Papenhoff's message of "Mon, 21 Oct 2019 08:22:42 +0200") Message-ID: <7wpnioc8rv.fsf@junk.nocrew.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Subject: Re: [TUHS] PDP-7 UNIX filesystem X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: tuhs@tuhs.org Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" Does anyone have any input for Angelo? I think the questions he asks are interesting. Please note he's asking about PDP-7 Unix, not the unrelated "dd" command and how "." and ".." work in later Unix versions. Angelo Papenhoff wrote: > you cannot execute a program if you're in a directory you can't write into. > > I asked Warren about this when I first tried pdp7 unix and he > explained it to me: the shell creates a link to the binary and executes > it. If it can't write into the current directory, it fails to create the > link and hence can't execute the program. > How was this handled in practice? did users have write > permissions on all directories? did you just stay in your directory all > the time? > . and .. This part is apparently resolved.