Path: utzoo!utgpu!watserv1!watmath!att!linac!pacific.mps.ohio-state.edu!zaphod.mps.ohio-state.edu!wuarchive!uunet!world!kaspar!ires
From: ires@kaspar.UUCP (Bruce R. Larson)
Newsgroups: comp.unix.sysv386
Subject: portable `rewind' for tape devices
Keywords: tape, dd, FAQ
Message-ID: <19@kaspar.UUCP>
Date: 29 Nov 90 02:13:56 GMT
Organization: Integral Resources
Lines: 34

I've been looking for a portable `rewind' to use in shell scripts,
and I may have found (or more likely, reinvented) the perfect solution.
I am posting this because it answers the rewind question raised in FAQ #5.

Here are a couple of Bourne shell functions to
i)  rewind the tape device, and
ii) advance to the next archive on the tape.


TAPE=dev/tape
NTAPE=/dev/ntape

rewind_tape(){
	dd if=$TAPE of=/dev/null count=0 2>/dev/null
}

advance_tape(){
	dd if=$NTAPE of=/dev/null count=0 2>/dev/null
}


It works for me!

Bruce

Bruce R. Larson				| The drug problem in the US is so
Integral Resources, Milton MA		|  vast that we need to recognize that
Internet: ires.com!blarson@cs.umb.edu	|   it is primarily a social problem,
Uucp:     ..!cs.umb.edu!ires.com!blarson|    not a criminal problem.
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