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#!/bin/bash
#
# upd-updates
#
# Copyright (C) 2007 Red Hat, Inc. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
usage() {
if [ $1 -ne 0 ]; then
>&2
fi
echo "upd-updates <updates.img> <file0> [<file1> [...]]"
exit $1
}
[ -z "$1" -o -z "$2" ] && usage 1
[ "$1" == "--help" ] && usage 0
TARGET="$1" ; shift
OK=no
if [ -e "$TARGET" -a -w "$TARGET" -o -w $(dirname "$TARGET") ] ; then
OK=yes
fi
if [ "$OK" == "no" ]; then
echo "upd-updates: cannot write to $TARGET" 1>&2
exit 2
fi
n=1
while [ -n "$(eval echo '$'$n)" ]; do
arg="$(eval echo '$'$n)"
[ ${arg} == "--help" -o ${arg} == "-h" ] && usage 0
if [ ! -r ${arg} ]; then
echo "upd-updates: cannot read ${arg}" 1>&2
exit 3
fi
n=$(($n + 1))
done
TMPDIR=$(mktemp -d)
if [ ! -d ${TMPDIR} ]; then
echo "upd-updates: cannot make tmpdir ${arg}" 1>&2
exit 4
fi
if [ -e "$TARGET" ]; then
zcat "$TARGET" | ( cd $TMPDIR ; cpio -di --quiet -dm --unconditional )
[ $? -eq 0 ] || exit 5
fi
echo ${@} | tr ' ' '\0' | tr -d '\n' | cpio --null -H newc --quiet -o | \
( cd $TMPDIR ; cpio -di --quiet -dm --unconditional )
[ $? -eq 0 ] || exit 6
(cd $TMPDIR ; find . -depth -print0 | cpio -H newc --quiet --null -o ) | \
gzip -9 > "$TARGET"
[ $? -eq 0 ] || exit 7
rm -rf "$TMPDIR"
[ $? -eq 0 ] || exit 8
exit 0
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