mc/vfs/extfs/ucpio.in

#!/bin/sh
#
# Written by Stas Maximov 1998 SVR4 (UnixWare)
# stmax@u213.srcc.msu.su 
# (C) 1996 The Free Software Foundation.
#
#

uni_cat ()
# $1 is the archive name
{
    case "$1" in
    *.cpio.Z)	compress -dc "$1"
	;;
    *.cpio.gz)	gzip -dc "$1"
	;;
    *.cpio)	cat "$1"
	;;
    *)		echo "unknown extension"
    esac
}

mccpiofs_list ()
# $1 is the archive name
{
    uni_cat "$1" | cpio -itv | @AWK@ '
	{
	    if (substr($9,length($9),1) == ",")
	    {
		tmp = substr($9, 1, length($9)-1);
		$9 = $8;
		$8 = tmp
	    }
	    else if (substr($10,length($10),1) == ",")
	    {
		tmp = substr($10, 1, length($10)-1);
		$10 = $9
		$9 = tmp 
	    }
		
	    print $0
	}'
}

mccpiofs_copyout ()
# $1 is the archive name
# $2 is a name of a file within the archive
# $3 is a name of a file within the system (to add from or extract to)
{
    TMPDIR=/tmp/mctmpdir.$$
# FIXME: Try harder to generate a unique directory if this fails
    mkdir -m 0700 $TMPDIR || exit 1
    cd $TMPDIR
    uni_cat "$1" | cpio -icumd "$2" 2>/dev/null
    mv "$2" "$3"
    cd /
    rm -rf $TMPDIR
}

#
# main
#
    umask 077

    case "$1" in
    list)   mccpiofs_list $2
	    exit 0
	    ;;
    copyout) mccpiofs_copyout $2 $3 $4
	    exit 0
	    ;;
    esac

    exit 1