a warning for people who ssh and switch instead of connection as a dev user right away

sshwarn.sh

#!/bin/bash
#warns a user to log in as dev by a key instead of sudo su-ing every time

function get_ps {
  pid=$1
  what=$2
  echo $(ps -o $what -p $pid h | tr -d ' ')
}

function get_parent {
  pid=$1
  echo $(ps -o ppid= $pid)
}
     
pid=$$

dev_name=$(get_ps $$ user)

while [[ $(get_ps $pid cmd) != "sudosu-$dev_name" &&  $pid != 1 ]] ; do
    pid=$(get_parent $pid)
done
         
if [[ $pid == 1 ]] ; then
        exit 
fi

user_name=$(get_ps $pid user)

if [[ $user_name != $dev_name ]]; then
    gray='\033[0;37m'
    green='\033[0;32m'
    def='\033[0;39m'
    
    echo
    echo -e "Did you know you could add your ssh public key to ${green}~/.ssh/authorized_keys${def} (or ${green}~/.ssh/authorized_keys2${def} if you don't have an access to the previous one)"
    echo "and log in without switching user to $dev_name every time?"
    echo
    echo "You could also set up a master session to log in just one time, just add this totally non-malicious entry to your local ssh config:"
    echo -e "
          ${gray}#reuse existing ssh connection${def}
          ${green}Host *        
            ControlMaster auto
            ControlPath ~/.ssh/master-%r@%h:%p${def}"
    echo 
    echo -e "If you don't like this notification and prefer to sudo su, just do"
    echo "
          touch ~/.hush_sshwarn"  
    echo
fi