#!/bin/bash

#define confirm function
# modified so it only asks for confirmation if needed
confirm()
{
   local foo
   if [ "${CONFIRM:-0}" = "1" ]; then
      echo Confirm: $* >&2
      read foo <&2
   else
      foo="Yes"
   fi
   case "$foo" in
      n*|N*)
         echo command skipped
         ;;
      *)
         #execute the command
         $*
         ;;
   esac
}

echo move /usr to /disk0/usr
echo note that this is kind of dangerous and
echo is best done in single user mode
confirm mv -f /etc/fstab /etc/fstab.bak
confirm sed -e "s@/usr@/disk0@" </etc/fstab.bak >/etc/fstab
confirm mkdir /disk0
confirm mkdir /usr/usr
confirm chmod 755 /usr/usr
confirm chmod 755 /disk0
confirm cd /usr
echo the next command will generate one error message
echo about moving usr to usr/usr
confirm mv * usr
confirm cd /
confirm umount /usr
confirm mount /disk0
confirm rmdir /usr
confirm ln -s /disk0/usr /usr
echo quick fix for X11 symbolic link bugs
confirm ln -s /etc /disk0/etc
echo quick fix for redhat symbolic link bugs
confirm ln -s /bin /disk0/bin

echo This should be done in single user mode
echo move /var to /disk0/var
confirm mkdir /disk0/var
confirm eval 'cd /; tar cvf - var | (cd /disk0; tar xvfp -)'
confirm rm -Rf /var
confirm ln -s /disk0/var /var

# replace /tmp with symlink to /disk0/var/tmp
confirm rm -Rf /tmp
confirm ln -s /disk0/var/tmp /tmp

# move /home to /disk0/home, with symbolic links for each "user"
# rather than one for the whole /home structure
confirm eval 'cd /; tar cvf - home | (cd /disk0; tar xvfp -)'
confirm cd /disk0/home
for i in *; do
    echo $i
    confirm rm -Rf /home/$i
    confirm ln -s /disk0/home/$i /home/$i
done
confirm sync

# confirm reboot
echo "please reboot system now"