From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <20020813055305.1931.qmail@g.bio.cse.psu.edu>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Ephase question.
In-Reply-To: Message from "Russ Cox" <rsc@plan9.bell-labs.com>
   of "Tue, 13 Aug 2002 01:42:24 EDT." <859eea04603e722a7dabc2bc0ef5bf73@plan9.bell-labs.com>
From: Scott Schwartz <schwartz@bio.cse.psu.edu>
Date: Tue, 13 Aug 2002 01:53:05 -0400
Topicbox-Message-UUID: db50c2b6-eaca-11e9-9e20-41e7f4b1d025

rsc writes:
| i've seen it recently on either freebsd or linux,
| in the case of trying to remove or perhaps overwrite

It's overwrite.  (Solaris, on the other hand, blows away the process.)
So to safely (atomically) install a new executable or shared library,
you have to write it to a temp file, and then rename it into place.