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Power 6/32 Unix version 1.2b

#! /bin/sh
#
#	diff3.sh	4.1	83/02/10
#
e=
case $1 in
-*)
	e=$1
	shift;;
esac
if test $# = 3 -a -f $1 -a -f $2 -a -f $3
then
	:
else
	echo usage: diff3 file1 file2 file3 1>&2
	exit
fi
trap "rm -f /tmp/d3[ab]$$" 0 1 2 13 15
diff $1 $3 >/tmp/d3a$$
diff $2 $3 >/tmp/d3b$$
/usr/lib/diff3 $e /tmp/d3[ab]$$ $1 $2 $3

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