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#!/bin/sh
#
# Copyright (c) 2007 Gordon Gremme <gordon@gremme.org>
# Copyright (c) 2007 Center for Bioinformatics, University of Hamburg
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
if [ $# -le 1 ]
then
echo "Usage: `basename $0` preprend_file file [...]" >&2
echo "Prepend \"preprend_file\" to each \"file\" and replace it afterwards." >&2
echo "The original \"file\" is saved as \"file.bac\"." >&2
exit 1
fi
preprend_file=$1
shift
for FILE in $*
do
TMPFILE=`mktemp`
cp $FILE $FILE.bac
cat $preprend_file $FILE > $TMPFILE
if [ $? -eq 0 ]
then
# cat command succeeded -> overwrite file
mv -f $TMPFILE $FILE
else
echo "`basename $0`: cat command failed, removing tmpfile"
rm -f $TMPFILE
fi
done
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