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From: dpw@unisec.UUCP
Newsgroups: comp.unix.wizards
Subject: Re: rm with a block scrub
Message-ID: <520@unisec.usi.com>
Date: Tue, 19-May-87 21:01:46 EDT
Article-I.D.: unisec.520
Posted: Tue May 19 21:01:46 1987
Date-Received: Thu, 21-May-87 04:36:42 EDT
References: <7421@brl-adm.ARPA> <6899@alice.UUCP>
Reply-To: dpw@unisec.USI.COM (Darryl P. Wagoner)
Organization: UniSecure Systems, Inc. Newport, RI
Lines: 19
Summary: Check the number of links first

In article <6899@alice.UUCP> ark@alice.UUCP writes:
In article <7421@brl-adm.ARPA>, evins@nrl-radar.arpa writes:
>> 	Does anyone know of a version of rm that allows you to scrub blocks
>> clean before making them available, for BSD VAXes and Suns.

>Before you unlink the file, open it for output and write a block
>of zeroes over every block of the file.  Then sync() and unlink it.

Before you go out "scrubbing" the file with zeros make sure it is the
last link or you will find yourself with a file that has been
wiped clean.  Could have some very bad results if it was say, ptmp.



-- 
Darryl Wagoner			
UniSecure Systems, Inc.; 		dpw@unisec.usi.com
Newport,  RI; (401)-849-0857 
UUCP:  {gatech|mirror|cbosgd|uiucdcs|ihnp4}!rayssd!unisec!dpw