iarchiveml / posixsh

Simple shell environment written in C, using posix_spawn to run executables.

posixsh

posixsh is a simple shell written in c using posix_spawn to run executables. It can handle most basic tasks that any other interactive shell can handle.

Installation

Just make sure you have gcc and make installed, then simply run:

make all

Usage

After runing just type "help".

WELCOME TO PANDASH, A SIMPLE SHELL WRITTEN IN C
BUILT IN COMMANDS:
	help:
		IT WILL PRINT THIS PROMT
	cd [path?]:
		IT WILL CHANGE CWD TO 'PATH' OR $HOME
	exit:
		IT WILL TERMINATE THE CURRENT SHELL
	pandash_talk [YOUR_ID] [THE_OTHER_SHELL_ID]: (ID can be anything)
		GOES TO CHAT MODE AND YOU CAN CHAT WITH ONE OTHER PANDASH SHELL
	pandash_send [THE_OTHER_SHELL_ID] [YOUR QOUTED MSG]: (ID can be anything)
		TRYS TO DELIEVER YOUR MSG, YOUR ID IS PRINTED AS SOON AS YOU EXECUTE THIS PROGRAM

About

If you are willing to run a script - like the example i have provided - you can run "pandash scriptName" and for interactive mode just run "pandash". It is always listening for other pandas messages.

You can also communicate with other pandash shells using "pandash_talk" built-in command, it will take you to chat mode and you can start sending messages, just make sure your provided IDs are not identical. For example if your id is COOL and the other shell's ID is COOLER your should run "pandash_talk COOL COOLER" and the other shell must run "pandash_talk COOLER COOL" (you choose your ID by typing this command)!

More details

Each command you type to execute is handled by a child process and can be terminated using Cntrl+c. Piped commands are handled in the same manner but they exchange their stdin and stdout.

Named pipes, aka FIFO, is used for implementing communication functionality and a child process is responsible for handling "chat mode" so you can use Cntrl+c to exit from "chat mode".

Hope you enjoy! Use at your own risk :)