I made this for the SENG440 embedded systems class which requires students to run c code on an arm processor. In order to access this processor the code must first be uploaded to a machine on UVic, compiled with an arm processor, transferred over to an arm machine with lftp, and then the user can finally telnet into the machine to execute the program. On top of all this the professor requested that we cleanup the files that we use because the machine does not have much storage. This is a lot of work.

To manually do all of this the user has to do the following tasks

1. SCP transfer the files over to the /tmp/ folder on a machine at UVic
2. SSH into the machine, move over to /tmp/ and compile the code
3. lftp transfer the output executable
4. telnet into the arm machine, log in by copying and pasting the provided username and password
5. executing the code
6. deleted the executable

To run all of this manually, even with all the commands ready to go, will take at least 3-4 minutes of active work.

However, with this script you simply need to run it with the file you wish to upload and it will handle all of this in about 30 seconds.

If we need to compile and run code for this class 50 times, we can turn 150-200 minutes of mindless work into just running one command and waiting!

Running C Code (outdated, uses folder now)

Displaying Assembly (outdated, uses folder now)

I've only run this on MacOS, I'm not sure what is available on other UNIX platforms.

You must set up an SSH key to allow the script to connect to the remote servers. Just follow steps 1-3 on the following article https://www.digitalocean.com/community/tutorials/how-to-set-up-ssh-keys--2

When you make your SSH key, don't put a password on it if you want the script to run without any user input

NOTE: Place this script in the same directory as your C files.

sh ./run-arm.sh <path to private key> <netlink id> <desired arm user> <-command> <c file>

examples:

1. Run code on arm

• sh ./run-arm.sh ~/keys/seng440 vernon user2 -c helloworld.c

2. Display assembly

• sh ./run-arm.sh ~/keys/seng440 vernon user2 -s helloworld.c

Note: On linux, might throw unexpected ( syntax error

To fix this, chmod the run-arm.sh file to allow execution and then do

• ./run-arm.sh ~/keys/seng440 vernon user2 -s helloworld.c

The script will do the following tasks:

1. SSH into the seng440 server and make the folder /tmp/netlinkid
2. Transfer the c file into the previously made folder
3. SSH into the seng440 server again and create an executable file titled netlinkid.exe
4. lftp the file into the arm machine
5. telnet into the arm machine, change the file permissions, and execute
6. Delete the executable on the arm machine
7. Delete the folder in tmp
8. Finish!