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 377aea11 for ; Thu, 1 Aug 2019 23:44:22 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id 7129B9BA9E; Fri, 2 Aug 2019 09:44:20 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 6DE259B84E; Fri, 2 Aug 2019 09:43:54 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 901949BA7E; Fri, 2 Aug 2019 09:43:52 +1000 (AEST) Received: from mercury.lcs.mit.edu (mercury.lcs.mit.edu [18.26.0.122]) by minnie.tuhs.org (Postfix) with ESMTPS id 2DBB69B84E for ; Fri, 2 Aug 2019 09:43:52 +1000 (AEST) Received: by mercury.lcs.mit.edu (Postfix, from userid 11178) id 04A9118C0A1; Thu, 1 Aug 2019 19:43:51 -0400 (EDT) To: tuhs@tuhs.org Message-Id: <20190801234351.04A9118C0A1@mercury.lcs.mit.edu> Date: Thu, 1 Aug 2019 19:43:51 -0400 (EDT) From: jnc@mercury.lcs.mit.edu (Noel Chiappa) Subject: Re: [TUHS] Who's behind the UNIX filesystem permission 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: jnc@mercury.lcs.mit.edu Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" > From: Dave Horsfall > it actually *unlinked* directories Maybe the application was written by a LISP programmer? :-) (Not really, of course; it was probably just someone who didn't know much about Unix. They had a list of system calls, and 'unlink' probably said ' only works on directories when the caller is root', so...) Speaking of LISP and GC, it's impressive how GC is not really a big issue any more. At one point people were even building special CPUs that had hardware support for GC; now it seems to be a 'solved problem' on ordinary CPUs. Noel