Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!hc!beta!jpm From: jpm@beta.UUCP (James P Mcgee) Newsgroups: comp.cog-eng Subject: Re: Request for human interface des Message-ID: <13159@beta.UUCP> Date: Tue, 8-Dec-87 12:24:31 EST Article-I.D.: beta.13159 Posted: Tue Dec 8 12:24:31 1987 Date-Received: Sun, 13-Dec-87 06:30:37 EST References: <6304@ncoast.UUCP> <10300004@osiris.cso.uiuc.edu> <453@uni2.bcm.tmc.edu> Organization: Los Alamos Natl Lab, Los Alamos, N.M. Lines: 15 Summary: File permissions: need append permission also One other permission that I feel is necessary for some applications is an append permission. This differs from write permission in that, while nothing that is already there can be changed, new data may be added. To add new data to a file, or directory, in Unix requires write permission. However, this also allows the user to change information that is already present, or to delete it by changing it to null. Consider a log file of system events, or a mailbox, or a bulletin board system. In each of these cases, general users (programs) must be able to add information, but should not be able to change, or in some cases, even read what is already there. Pat McGee, jpm@lanl.gov, MS B272, Los Alamos National Laboratory, Los Alamos, NM, 87545. (505) 667-4196 (FTS 843-4196)