Simple Shell

Description

This is a simple UNIX command line interpreter that replicates functionalities of the shell.

simple_shell$ gcc -Wall -Werror -Wextra -pedantic *.c -o hsh

simple_shell$ ./hsh

After successful compilation, the shell is launched and ready for both interactive and non-interactive executions.

Run program and wait for the prompt $ to appear. From there, type desired commands. Exit program with the exit command or Ctrl+D.

From command line, use echo command and pipe into the program like so:

simple_shell$ echo "command" | ./hsh

Command Name	Description	Sypnosis
`exit`	Cause normal process termination	`exit`
`env`	Run a program in a modified environment	`env [OPTION]... [-] [NAME=VALUE]... [COMMAND [ARG]...]`
`help`	Retrieve informational text on how use builtin	`[-dms] [pattern ...]`

$ /bin/pwd
/home/vagrant/simple_shell

$ env
*prints whole environment*

$ ls -l
-rw-rw-r-- 1 vagrant vagrant   158 Aug 28 16:35 directory_1
-rw-rw-r-- 1 vagrant vagrant  2139 Aug 29 02:29 directory_2

$ help exit
exit the shell.

File Name	Description
coolshell.h	Header file with function prototypes, structs and standard libraries.
coolshell_buf_process.c	Functions that read, tokenize and count user input.
coolshell_builtins.c	Functions that check built-ins, print environments and exit shell.
coolshell_handle_cmd.c	Functions that handle command with or without PATH directory strings and execute commands.
coolshell_helpers_1.c	Functions that duplicate and concatenate strings and fill memory with a constant bytes.
coolshell_helpers_2.c	Functions that return length and turn integers into a string and write characters to standard output.
coolshell_main.c	Main Function that executes command line operations.
coolshell_path_process.c	Functions that gets, tokenizes, counts, and concatenates an environmental variable string as well as checking the status of a file.
man_1_simple_shell	Simple Shell man page

This program was created by: