Homemade Unix commands

These C programs emulate some Unix commands. They were made by me in 2022 to practice C language. My implementations do not claim to be an alternative to the original ones.

Setup

Showing an example of ls

1. Compile the executable:

gcc ls.c -o ls 

2. Run the executable:

./ls /insert/your/dirname/here

3. Enjoy!

List of commands

ls

• ls [-al] [file]
• ls only accepts a single file or directory as an argument, although in Unix it is possible to accept more than one;
• -a option completely mimics the original one: it displays all files and directories starting with a dot;
• -l option mimics the -1 option from the original. It displays all files and directories line by line.

tail

• tail [+-n] [file1] [file2] [file3] ... [fileN];
• tail accepts multiple files as an argument;
• -n option displays n last lines (n = 10 by default);
• +n option displays file from the n-th line.

Contributing

This repository is open for contributing. So feel free to open issues and make pull requests.