enable_programmer_access

#!/bin/bash
rules="90-atmel.rules"
rules_path="-"	# no $rules found
if [ -e ./$rules ] # check if $rules is in ./ 
then
 rules_path="./"
fi
if [ ${rules_path} = "-" ] 
then
 echo "Error, File ${rules} not found, no entry in /etc/udev/rules.d/ !"
else		# now we know the relative path to the $rules file and check for same
 rdiffs=1
 if [ -e /etc/udev/rules.d/${rules} ]
 then  # there is a file with same name in /etc/udev/rules.d/
  diff ${rules_path}${rules} /etc/udev/rules.d/${rules} > /dev/null
  rdiffs=$?
 fi
 if [ ${rdiffs} -ne 0 ]
 then   # copy is required, files are not the same
   sudo cp ${rules_path}${rules} /etc/udev/rules.d/${rules}
  if [ $? -eq 0 ]
  then
   sudo udevadm control --reload-rules
   if [ $? -eq 0 ]
   then
    echo "New ${rules} file in /etc/udev/rules.d/ is activated now!"
   else
    echo "Could not activate the new ${rules} file in /etc/udev/rules.d, please reboot you system!"
   fi
  else
   echo "Error, File ${rules} is not copied to /etc/udev/ruled.d/ !"
  fi
 else
  echo "Identical file ${rules} already is at /etc/udev/rules.d/ , no action required."
 fi
fi
groups | grep -e plugdev > /dev/null
plug_mem=$?
groups | grep -e dialout > /dev/null
dial_mem=$?
if [ ${plug_mem} -eq 0 ] && [ ${dial_mem} -eq 0 ]
then
 echo "User ${USER} is already member of the groups 'dialout' and 'plugdev', no action required."
else  # you are not member of both groups, dialout and plugdev !
 # make shure, that the groups plugdev and dialout exist
 sudo groupadd -f plugdev
 sudo groupadd -f dialout
 # add this user to the groups plugdev and dialout
 sudo usermod -a -G dialout,plugdev ${USER}
 if [ $? -eq 0 ]
 then
  echo "The user ${USER} is added to the groups 'dialout' and 'plugdev'!"
 else
  echo "Error, could not add user ${USER} to the groups 'dialout' and 'plugdev', please try it otherwise!"
 fi
fi
# Finally we list the USB-serial devices of your system with registered identification
echo " "
echo "List of USB-serial devices at your system:"
ls -l /dev/serial/by-id/* | cut -c41-