Small-Shell

A small Linux shell, nicknamed Smash. It was created by me as part of an OS course assignment.

Features

Smash supports the following commands:

note: The follwoing command syntax has <> for mandatory arguments and [] for optional ones.

Built-in commnads

• pwd - show working directory.
• cd <path> - change working directory.
• history - show latest commands.
• jobs - show all running/stopped jobs.
• kill -<signum> <job> - send signum to job # from jobs.
• showpid - show Smash's own process ID.
• fg [job number] - run latest/specified job in foreground.
• bg [job number] - run latest/specified job in background.
• quit [kill] - exit smash and optionally kill all running jobs.
• cp <old file name> <new file name> - create a copy of an existing file.
• diff <file1> <file2> - compare the content of two files.

Executables

• <command> [arguments] - run command in foreground.
• <command> [arguments] & - run command in background.

Key strokes

• ctrl+c - kill foreground process.
• ctrl+z - stop foregroud process.

Try it!

Smash is available for running at https://replit.com/@naftali10/OS-HW1
The work directory has 2 executables to play with using Smash: count & print_hello.