File: move-if-change

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cssc 1.0.1-4
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#! /bin/sh
#
# move-if-change
#
# Taken from gcc-2.7.2.1.tar.gz, with thanks.
#
# Like mv $1 $2, but if the files are the same, just delete $1.
# Status is 0 if $2 is changed, 1 otherwise.
if
test -r $2
then
if
cmp -s $1 $2
then
echo $2 is unchanged
rm -f $1
else
mv -f $1 $2
fi
else
mv -f $1 $2
fi