#!/bin/sh
#

TCEDIR="/etc/sysconfig/tcedir/"
TRASH="/tmp/trash"
EXTNAME=$1
CHANGES=0

if [ "`expr match "$EXTNAME" '.*\(.tcz$\)'`" != '.tcz' ]; then EXTNAME=$EXTNAME.'tcz'; fi

if [ ! -d $TRASH ]; then mkdir $TRASH; fi


if [ ! -d "$TRASH/$EXTNAME" ]; then mkdir "$TRASH/$EXTNAME"; fi


TRASHSIZE=`du -d 1 -h $TRASH'/'$EXTNAME`
TRASHSIZE=${TRASHSIZE%%/*}
if [ $TRASHSIZE != '0' ]; then
 echo 'It will release '$TRASHSIZE'of disk space. Delete '$EXTNAME'? [Y/N]'
 read action
 if [ $action == 'Y' ] || [ $action == 'y' ]; then 
  rm -r "$TRASH/$EXTNAME";
  

  touch $TCEDIR'onboot.lst.new'
  while read line; do
   if [ "$line" != "$EXTNAME" ]; then echo $line >> $TCEDIR'onboot.lst.new'; fi
  done < $TCEDIR'onboot.lst'
  mv $TCEDIR'onboot.lst.new' $TCEDIR'onboot.lst'
  echo "$EXTNAME was deleted!"; 
 else
  for file in "$TRASH/$EXTNAME/*"; do
   mv "$file" $TCEDIR'optional/';
   echo "$file restored from trash"
  done
  echo "deleting $EXTNAME was canceled"
 fi
 exit 0
fi

if [ ! -f $TCEDIR'optional/'$EXTNAME ]; then echo "$EXTNAME does not exist"; exit 1; fi


function checkTCZ()
{
 while read line; do
  if [ "$line" == "$1" ] && [ "$line" != "$EXTNAME" ]; then echo "$1 NOT removed: extension present in onboot.lst"; return 0; fi
 done < $TCEDIR'onboot.lst'
 for DEPFILE in `find $TCEDIR'optional' -name '*.dep'`; do
  if [ "$DEPFILE" == "$2" ]; then continue; fi
  while read line; do
    if [ "$line" == "$1" ]; then echo "$1 NOT removed: extension used in "${DEPFILE##/*/}; return 0; fi
  done < $DEPFILE
 done 
 if [ -f $TCEDIR"optional/$1.dep" ]; then
 while read line; do
  if [ -z "$line" ]; then continue; fi
   checkTCZ $line $TCEDIR'optional/'$1'.dep'
  done < $TCEDIR'optional/'$1'.dep'
 fi
 DISK=`df | grep -E '/tmp/tcloop/'${1%.*}'$' | grep -o -E "^/dev/loop[0-9]{1,3}"`
 umount $DISK 2> /dev/null
 if [ $? -ne "0" ]; then
  echo "can not umount $DISK with $1. Service launched?"
  if [ $CHANGES -ne 0 ]; then for file in "$TRASH/$EXTNAME/*"; do mv "$file" $TCEDIR'optional/'; done; fi
  echo "deleting $EXTNAME was canceled"
  exit 1
 else
  echo "$1 removed to $TRASH/$EXTNAME";
  mv $TCEDIR'optional/'$1 $TRASH'/'$EXTNAME
  mv $TCEDIR'optional/'$1.'md5.txt' $TRASH'/'$EXTNAME
  if [ -f $TCEDIR'optional/'$1.'dep' ]; then cp $TCEDIR'optional/'$1.'dep' $TRASH'/'$EXTNAME; fi
  CHANGES=1
 fi 
}

checkTCZ $EXTNAME

if [ $CHANGES -ne 0 ]; then $0 $EXTNAME; fi