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=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, PLING_QUERY,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 eefbe66d for ; Mon, 21 Oct 2019 16:51:06 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id 578139B87D; Tue, 22 Oct 2019 02:51:05 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id A478B94772; Tue, 22 Oct 2019 02:50:48 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=pass (2048-bit key; unprotected) header.d=papnet.eu header.i=@papnet.eu header.b="KG7TZz5F"; dkim=pass (2048-bit key; unprotected) header.d=messagingengine.com header.i=@messagingengine.com header.b="O8D3gCmD"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id C239394772; Tue, 22 Oct 2019 02:50:47 +1000 (AEST) Received: from wout4-smtp.messagingengine.com (wout4-smtp.messagingengine.com [64.147.123.20]) by minnie.tuhs.org (Postfix) with ESMTPS id 726D093D8C for ; Tue, 22 Oct 2019 02:50:46 +1000 (AEST) Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.west.internal (Postfix) with ESMTP id 968A85F1 for ; Mon, 21 Oct 2019 12:50:45 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute1.internal (MEProxy); Mon, 21 Oct 2019 12:50:45 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=papnet.eu; h= date:from:to:subject:message-id:references:mime-version :content-type:in-reply-to; s=fm3; bh=F13PeShLP32Gxe8FtbstC59xDWV PS/A+djbrgwFzP00=; b=KG7TZz5F0f3iMXeq7sTWa1+7w2mCH2r5fQdmIk2Q0mV tXBTtq+fQyLYDe8srce9qG4j40uOSgO76bVWFTti3q5AVGlNboLHBGp6F+GNOHi/ EWgF3I1mOu4bzZRfQntFlCrhswCy76s4Mx9xyWbBP4PutUw2/uKap3GyuhmG1GbK Ju1KliGbwUP7QgycV49DoXdEMpNR0Tc6HogCu6iWnhRezR7lLw2u6pOS8FYe+8t8 8kwRp6Xr5qN44+BlvSZrxNL3FV8BUYOHNEyIwm/Jl3TtqbgZR0Eenmht9pbveQCg Z8QXfkJXB60vJWgy6IpJ0NFG4H59za+oPaEhtPyXKew== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm1; bh=F13PeS hLP32Gxe8FtbstC59xDWVPS/A+djbrgwFzP00=; b=O8D3gCmDwMcSc32ZzvgFVu Ft4YNKJg0TXiq35oBSbwMUourIokwF+GVmQiclV7zH39TUz4rSlJ3EzKHlhJJK/R sJHtFpUdCSqph+9RMkMqGiffaHf5j2vHAagp6paI0XaFMU4FFdMYTwZggk4rRlrK AdoRsv6B0aOgJhKqiPE681w+VfcqIE2aYh7Zw1soMG6F7zLSnzSP8mkRQv6RqsrW OxR6LrGqnaegypSKZ8D1sU8vBZWWXoUGISZJpUfnXARAdJb+VpmDscT0X1I5Kux4 u5ibu9aAm6VNlvAPretnEDakWLQfDvwInfb+AxJn/YuPPwU8JoJ2/kjL/AQC/exQ == X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedufedrkeehgddutdekucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucenucfjughrpeffhffvuffkfhggtggujggfsehttd ertddtredvnecuhfhrohhmpeetnhhgvghlohcurfgrphgvnhhhohhffhcuoegrrghpsehp rghpnhgvthdrvghuqeenucffohhmrghinhepghhithhhuhgsrdgtohhmnecukfhppeejke drheegrdefuddrvdenucfrrghrrghmpehmrghilhhfrhhomheprggrphesphgrphhnvght rdgvuhenucevlhhushhtvghrufhiiigvpedt X-ME-Proxy: Received: from indra.papnet.eu (x4e361f02.dyn.telefonica.de [78.54.31.2]) by mail.messagingengine.com (Postfix) with ESMTPA id 5BAAAD6005B for ; Mon, 21 Oct 2019 12:50:44 -0400 (EDT) Date: Mon, 21 Oct 2019 18:50:42 +0200 From: Angelo Papenhoff To: tuhs@minnie.tuhs.org Message-ID: <20191021165042.GA18793@indra.papnet.eu> References: <20191021121000.34E3B18C09F@mercury.lcs.mit.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191021121000.34E3B18C09F@mercury.lcs.mit.edu> User-Agent: Mutt/1.6.0 (2016-04-01) Subject: Re: [TUHS] What was your "Aha, Unix!" moment? 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: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" On 21/10/19, Noel Chiappa wrote: > > From: Warren Toomey > > > But wasn't "chdir" built into the PDP-7 Unix shell? > > No. See "The Evolution of the Unix Time-sharing System", in section "Process > control". In fact, in our code it is: https://github.com/DoctorWkt/pdp7-unix/blob/master/src/cmd/sh.s#L367 Probably a later version than what dmr described. And it would contradict the timing of ken's aha-moment story. aap