source: MondoRescue/branches/3.3/mindi-busybox/examples/unrpm@ 3865

#!/bin/sh
#
# This should work with the GNU version of cpio and gzip!
# This should work with the bash or ash shell!
# Requires the programs (cpio, gzip, and the pager more or less).
#
usage() {
    cat <<EOF
Usage: unrpm -l package.rpm            <List contents of rpm package>
       unrpm -x package.rpm /foo/boo   <Extract rpm package to this directory,
                                        put . for current directory>
EOF
    exit
}

rpm=$2

exist() {
    if [ -z "${rpm}" ]; then
        usage
    elif [ ! -s "${rpm}" ]; then
        echo "Can't find ${rpm}!"
        exit 1
    fi
}

if [ -z "$1" ]; then
    usage
elif [ "$1" = "-l" ]; then
    exist
    type more >/dev/null 2>&1 && pager=more
    type less >/dev/null 2>&1 && pager=less
    [ "$pager" = "" ] && echo "No pager found!" && exit
    (
        printf "\nPress enter to scroll, q to Quit!\n\n"
        rpm2cpio "${rpm}" | cpio -tv --quiet
    ) | ${pager}
    exit
elif [ "$1" = "-x" ]; then
    exist
    if [ -z "$3" ]; then
        usage
    elif [ ! -d "$3" ]; then
        echo "No such directory $3!"
        exit 1
    fi
    rpm2cpio "${rpm}" | (umask 0 ; cd "$3" ; cpio -idmuv) || exit
    echo
    echo "Extracted ${rpm} to $3!"
    exit
else
    usage
fi