#!/bin/bash


# filters the screen -ls output to show the sesssions
sessions=`screen -ls | sed -ne 's/[[:space:]]//' -ne 's/\((Attached)\|(Detached)\)// p'`
res=`echo "$sessions" | wc -w`

if [[ "$res" == "0" ]]
then
        echo "  No existing SCREEN session to reattach to..."
        exit
fi

echo ''
echo "  CURRENT SESSIONS"
echo "  ------------------------"
#screen -ls | sed -ne 's/[[:space:]]//' -ne 's/\((Attached)\|(Detached)\)// p' | cat -n
echo "$sessions" | cat -n
echo "  ------------------------"
echo ''

#prompt for the session to join
echo -n "  Reattach to session: "
read session


#attach to specified session
linenum=0
name=`screen -ls | sed -ne 's/[[:space:]]//' -ne 's/\((Attached)\|(Detached)\)// p' |
while read line
do
 let "linenum += 1"
 if [[ "$linenum" -eq "$session" ]]
 then
        echo $line
        break
 fi
done`

if [[ "$name" != "" ]]
then
   screen -d -r "$name"
else
   echo "  Could not reattach to '$session'"
fi