## exshell ##
 
#!/bin/bash
 
clear
shells="bash|ksh|csh|tcsh|pdksh|wksh|zsh"

find_stat () {
sshpid=$(ps -ef | grep $PPID|sed -n '1p'|awk '{print $3}' )
while [ $(ps -p $sshpid -o comm=) != "sshd" ]
 do
  sshpid=$(ps -ef | grep $sshpid|grep -v grep|awk '{print $3}'|sort -n|sed -n '1p')
 done
curview=$(pstree -p $sshpid)
myparent=$(echo "$curview"|grep -Eow "$shells"|sed -n '1p' )
jstatus=$(pstree -p $PPID) ; jstat=$(echo "$jstatus"|wc -l)
}

find_details () {
echo "-->Shells view<--">tmpsedX
for shell in $(echo "$shells"|sed 's/|/ /g')
 do
  echo "$curview"|grep -Eow "$shells"|sed -n "/$shell/p;" |sed -ne '{1p;$=;};'|sed 'N;s/\(.*\)\n\(.*\)/\2 \1 shell(s) were opened./'>>tmpsed
X
 done
incrparent=$(echo `expr $(sed -n "/$myparent/s/^\([0-9][0-9]*\).*/\1/p" tmpsedX) - 1`)
sed "2s/^[0-9][0-9]* $myparent/1 $myparent [parent] + $incrparent $myparent [subshell(s)]/" tmpsedX
}

get_view () {
echo -e "\n-->Process view<--\n$(echo "$curview"|sed 's/---pstree(.*)//')\nYou are in now \"`ps -p $PPID -o comm=`\" shell with pid $PPID number\n"
}

exit_shell () {
echo "Shell session is terminating.."
kill -1 $PPID ;sleep 1 ; kill -1 $PPID 2>/dev/null ; exit 1 ;
}

get_status ()
{
find_stat ;
parstat=$(echo "$curview"|grep sshd|grep -Eow "$shells"|wc -l)
substat=$(echo "$curview"|grep -Eow "$shells"|wc -l)
}

get_status ;

if [ $jstat -gt 1 ] ; then
 echo -e "Some jobs are open and running..\nPlease check your (background) jobs\n"
 get_view ;
 echo -e "\n*** Warning ***\nThere are some open process(jobs)!!
if you want to close forcely ssh session continue then open process will not be saved!!
anyway continue (y/n)?"
  read chc
   if [ "$chc" == "y" ] ; then
      exit_shell ;
   else
      exit 1 ;
   fi
fi


if [ $parstat -eq 1 ] ; then
     get_view ;
     echo -e "You are in parent shell(\"`ps -p $PPID -o comm=`\")\nClose Session(y/n)?"
     read pchc
     if [ "$pchc" == "y" ] ; then
        exit_shell ;
     fi
fi

if [ $substat -gt 1 ] ; then
     echo -e "You have some [shell script or child process(shell)] subshell(s)!!\n"
     find_details ; get_view ; find_stat ;
     echo -e "Do you want to close this session..\n(y/n)?"
     read nchc
     if [ "$nchc" == "y" ] ; then
        exit_shell ;
     fi
fi