initrd/init:copy_folders() (tahrpup)

copy_folders() { #SAVE_LAYER=/pup_ro1 #Line 593 of initrd/init (tharpup)
 echo -e "\n-------------------- copy_folders" #debug
 echo "SAVE_MP=$SAVE_MP"
 DESTDIR="/mnt/tmpfs/pup_ro1"
 [ -d "$DESTDIR" ] || mkdir -p $DESTDIR
 rm -r -f "$SAVE_LAYER"
 SAVE_FN="$DESTDIR"
 ln -s $DESTDIR $SAVE_LAYER
 #BKFOLDERS now set in check for pupmode=77
 BKLASTFOLDER="$(echo "${BKFOLDERS}" | head -n 1)"
 #a boot option allows ignore last n sessions, also need to create a badlist...
 if [ "$PIGNORELAST" ];then
  BKBADLIST="$(echo "${BKFOLDERS}" | head -n ${PIGNORELAST})"
  if [ -f ${SAVE_MP}/${BKLASTFOLDER}/.badfolders ];then
   cp ${SAVE_MP}/${BKLASTFOLDER}/.badfolders ${DESTDIR}/
   if [ $? -ne 0 ];then
    #fallback, in case last folder badly corrupted...
    BKPREVFOLDER="$(echo "${BKFOLDERS}" | head -n 2 | tail -n 1)"
    [ -f ${SAVE_MP}/${BKPREVFOLDER}/.badfolders ] && cp ${SAVE_MP}/${BKPREVFOLDER}/.badfolders ${DESTDIR}/
   fi
  fi
  echo "$BKBADLIST" >> ${DESTDIR}/.badfolders
  #note, rc.shutdown and savesession-dvd 'touch' this file so it will get saved.
  sync
 else
  [ -f ${SAVE_MP}/${BKLASTFOLDER}/.badfolders ] && cp ${SAVE_MP}/${BKLASTFOLDER}/.badfolders ${DESTDIR}/
 fi
 [ -f ${DESTDIR}/.badfolders ] && BKBADLIST="$(cat ${DESTDIR}/.badfolders | tr "\n" " ")"
 echo "BKBADLIST=${BKBADLIST}" #debug
 BKFOLDERS="$(echo -n "${BKFOLDERS}" | tr "\n" " ")"
 for ONEFOLDER in ${BKFOLDERS}
 do
  if [ "$(echo -n "$BKBADLIST" | grep "${ONEFOLDER}")" != "" -o -L "${SAVE_MP}/${ONEFOLDER}" ];then
   echo "$(printf "${L_FOLDER_MARKED_BAD}" "${ONEFOLDER}")" >/dev/console
   continue #ignore bad folder.
  fi
  echo "$ONEFOLDER" #debug
  echo -n "$(printf "${L_LOADING_FROM_CD}" "${ONEFOLDER}")" >/dev/console
  #need to be careful not to overfill the ramdisk...
  FREERAMDISK=$(df 2>/dev/null | grep /mnt/tmpfs | head -n 1 | tr -s " " | cut -f 4 -d " ")
  SIZEFOLDER=$(du -k -s ${SAVE_MP}/${ONEFOLDER} | cut -f 1)
  SIZEARCHIVE=0
  if [ -d ${SAVE_MP}/${ONEFOLDER}/archive ];then
   SIZEARCHIVE=$(du -k -s ${SAVE_MP}/${ONEFOLDER}/archive | cut -f 1)
  fi
  SIZESOURCE=$(expr $SIZEFOLDER - $SIZEARCHIVE)
  if [ $FREERAMDISK -gt $SIZESOURCE ];then
   #well, -u will only copy if files newer, so less stuff may get copied than calc'd above.
   #need to copy everything except archive folder...
   [ -d ${SAVE_MP}/${ONEFOLDER}/bin ] && cp -a -u ${SAVE_MP}/${ONEFOLDER}/bin ${DESTDIR}/
   [ -d ${SAVE_MP}/${ONEFOLDER}/sbin ] && cp -a -u ${SAVE_MP}/${ONEFOLDER}/sbin ${DESTDIR}/
   [ -d ${SAVE_MP}/${ONEFOLDER}/etc ] && cp -a -u ${SAVE_MP}/${ONEFOLDER}/etc ${DESTDIR}/
   [ -d ${SAVE_MP}/${ONEFOLDER}/lib ] && cp -a -u ${SAVE_MP}/${ONEFOLDER}/lib ${DESTDIR}/
   [ -d ${SAVE_MP}/${ONEFOLDER}/opt ] && cp -a -u ${SAVE_MP}/${ONEFOLDER}/opt ${DESTDIR}/
   if [ -d ${SAVE_MP}/${ONEFOLDER}/root/.var_saved ];then #100820 see /etc/rc.d/functions4puppy
    mkdir -p ${DESTDIR}/var
    cp -a -u ${SAVE_MP}/${ONEFOLDER}/root/.var_saved/* ${DESTDIR}/var/
   fi
   [ -d ${SAVE_MP}/${ONEFOLDER}/root ] && cp -a -u ${SAVE_MP}/${ONEFOLDER}/root ${DESTDIR}/
   [ -d ${SAVE_MP}/${ONEFOLDER}/root/.var_saved ] && rm -rf ${DESTDIR}/root/.var_saved
   [ -d ${SAVE_MP}/${ONEFOLDER}/usr ] && cp -a -u ${SAVE_MP}/${ONEFOLDER}/usr ${DESTDIR}/
   [ -f ${DESTDIR}/root/.XLOADED ] && rm -fv ${DESTDIR}/root/.XLOADED #toxic
   cp -a -u ${SAVE_MP}/${ONEFOLDER}/*.sfs ${DESTDIR}/ 2>/dev/null
   #delete deleted files (.wh.filename)... 110212 screen out .wh..wh..opq
   WHITEOUTS="$(find ${DESTDIR} -xdev -type f -name .wh.* | grep -v '__dir_opaque' | grep -v '.wh..wh.')" #110212
   echo "$WHITEOUTS" | while read DELWHITE ; do
    DELFILE="$(echo -n "$DELWHITE" | sed -e 's/\.wh\.//g')"
    if [ -e "$DELFILE" ];then
     [ "$PDEBUG" ] && echo "Deleting $DELFILE" #debug
     rm -rf "$DELFILE"
     rm -rf "$DELWHITE"
    fi
   done
   check_status 0 #display 'done' for each folder loaded.
  else
   printf "${L_RAM_DISK_FULL}\n" "${ONEFOLDER}"
   check_status 1
   break
  fi
 done
 sync
 echo -e "--------------------\n" # debug
}