Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!unix.cis.pitt.edu!dsinc!syd
From: syd@DSI.COM (Syd Weinstein)
Newsgroups: comp.mail.elm
Subject: Re: I need ELM for my personal use
Message-ID: <1991Mar2.145335.7161@DSI.COM>
Date: 2 Mar 91 14:53:35 GMT
References: <7484@rsiatl.Dixie.Com>
Reply-To: syd@DSI.COM
Organization: Datacomp Systems, Inc.  Huntingdon Valley, PA
Lines: 25

meo@Dixie.Com (Miles ONeal) writes:
>rob@mtdiablo.Concord.CA.US (Rob Bernardo) writes:
>[regarding building/using your own copy of elm]

>|One thing to watch out for in a situation like this is that elm (at least
>|on most systems) needs to run setgid to the group that owns the mail
>|spool directory and you will need non-ordinary permissions to install
>|it properly.

>Not necessarily. Many BSD-based systems, at least, have your mail
>file owned by you. As long as you have rw for it, you are set. Worst
>case is you set the variable that says don't delete an empty file,
>and use unix mail to create the first message in it.
What it really comes down to is the permissions on the mail spool
directory (so Elm can do locks)...

If the spool directory is 775, or 2755 the elm must get setgid to the
group of the mail spool.  If its a BSD system and the permissions are 
3777 then elm doesn't need to be setgid.  If its not a BSD type and the
permissions are x777, the mail spool is insecure.
-- 
=====================================================================
Sydney S. Weinstein, CDP, CCP                   Elm Coordinator
Datacomp Systems, Inc.                          Voice: (215) 947-9900
syd@DSI.COM or dsinc!syd                        FAX:   (215) 938-0235