source: MondoRescue/trunk/mindi/rootfs/sbin/untar-and-softlink@ 322

#!/bin/sh

Die() {
    echo "Fatal error! $1" >> /dev/stderr
    exit 1
}


# ---------------------- main ----------------------

mountpoint=/mnt/floppy
[ -e "/tmp/CDROM-LIVES-HERE" ] && mountpoint=/mnt/cdrom/images
[ "$#" -eq "3" ] || Die "untar-and-softlink <tarball> <untar_to> <softlink_to>"
diskno=$1
untar_path=$2
softlink_path=$3
tarball=$mountpoint/$diskno.tar.gz
if [ -e "/tmp/CDROM-LIVES-HERE" ] ; then
    [ -e "$tarball" ] || LogIt "Can't find CD's $tarball" 1
else
    while [ ! -f "$tarball" ] ; do
    echo -e -n "Please insert data (floppy) disk #$diskno and press ENTER."
    read line
    mount /dev/fd0 -t ext2 -o ro $mountpoint
    [ -f "$tarball" ] || umount $mountpoint ; # unmount if tarball not on disk
    echo -en "Working..."
    done
fi

[ -e "$mountpoint/LAST-DISK" ] && cp -f $mountpoint/LAST-DISK /
old_pwd=`pwd`
cd $untar_path
counter=0
for fname in `tar -zxvf $tarball` ; do
    [ -e "$softlink_path/$fname" ] && continue
    mkdir -p $softlink_path/$fname 2> /dev/null
    if [ ! -d "$untar_path/$fname" ] ; then
        rmdir $softlink_path/$fname 2> /dev/null
        ln -sf $untar_path/$fname $softlink_path/$fname
        sync;sync;sync
    fi
    counter=$(($counter+1))
    [ "$(($counter % 4))" -eq "0" ] && echo -en "\r\t\t\t\t\t\t\t\\"
    [ "$(($counter % 4))" -eq "1" ] && echo -en "\r\t\t\t\t\t\t\t|"
    [ "$(($counter % 4))" -eq "2" ] && echo -en "\r\t\t\t\t\t\t\t/"
    [ "$(($counter % 4))" -eq "3" ] && echo -en "\r\t\t\t\t\t\t\t-"
done
cd $old_pwd
echo -e -n "\r"
[ ! -e "/tmp/CDROM-LIVES-HERE" ] && umount $mountpoint
sleep 1
if [ ! -e "/tmp/CDROM-LIVES-HERE" -a -f "/LAST-DISK" ] ; then
    echo -en "Please remove the last data disk and press ENTER."
    read line
fi
exit 0