ssh-agent binding in ZSH

ssh.zsh

sshagent () {
  SSHAGENT=$(ps ax|grep "[s]sh-agent"| grep -cv Z)
  if (( $SSHAGENT == 0 ))
  then
    sshupdate
  else
    SSHPID="$(ps -eo pid,command | awk '/ ssh-[a]gent/ {print $1}');"
    SSHPID_ENV=$(awk  '/Agent/ {print $NF}' $HOME/.ssh-env)
    if [[ $SSHPID == $SSHPID_ENV ]]
    then
      source $HOME/.ssh-env
    else
      killall ssh-agent
      sshupdate
    fi
  fi
}

sshupdate () {
  ssh-agent > $HOME/.ssh-env
  source $HOME/.ssh-env
}

sshadd () {
  if (( $(ssh-add -l | grep -c $USER) == 0 ))
  then
    ssh-add
  else
    ssh-add -l
  fi
}