EMBEDDED OS UBUNTU LINUX

Please create a device driver that is multiuser and will take a string through a write operation and return that same string with the number of letters in the string through the read operation. use a device driver called testchar and a user program call tester. The driver must support the ioctl function to set the return string in a) all lower, b) all upper or d) in caps, this must be done in a loop asking the user of a string and how they would like the string processed. You must show the program working. Submit - source code for both and make file, including screenshot of prograrm working