C - Simple Shell Project.

Overview

Simple_shell repository contains files of our version of Shell which is a simple UNIX shell based on bash and Sh. Our command line version of the interpreter is written in C language.

Description

Simple Shell is a program that emulates a shell (bash) in an interactive mode. This is a command language interpreter that executes commands read from standard input.

Files Contained on this repository

File	Description
AUTHORS	Contains the authors of the Simple Shell program.
README.md	Contains an overview of Simple Shell. Important things that you should know before executes our Simple Shell program.
built-in.c	built_in: Checks cmd structure and prints their system calls. my_getline: Reads and store the input console. _strtok: Divides the buffer in tokens when it finds spaces. flag_0: Checks if there are errors on the first buffer. flag_1: Checks if there is more than 1 buffer.
function_match_1.c	print_env: Prints the enviroment. shell_printenv: Prints a single line of the enviroment. shell_setenv: Creates a value at the enviroment. shell_unsetenv: Deletes a value at the enviroment.
function_match_2.c	shell_clear: Clears the console. change_directory: Changes the directory. change_path: Changes the PATH.
functions_help_1	_concat: Concatenates the buffer with 'n' arguments.
functions_help_2	my_getenv: Searches a key string into the enviroment. _dstrlen: Calculates the size of the string of a double pointer. _free: Frees the double pointer. _drealloc: Reallocates memory depending on flags.
header.h	Contains the structures used in our code. Also contains all libraries needed.
main.c	main: Creates a simple shell. exit_time: Compares buffer with 'exit' ignoring spaces. bypass: Controls the routes of the structure of cmd. signal_betty: Prints \nCisfun$ after signal with betty style.
match.c	match: Matches the input with the stored string. function_fork: Divides the process before executes the system call execve().

Compilation

Usage: Shell *Simple shell is started with the standard input connected to the terminal. To start, compile all .c located in this repository by using this command:

gcc -Wall -Werror -Wextra -pedantic *.c -o Shell

Example

Usage: Shell

jairocast2@ubuntu:~/shell$ ./Shell
#Cisfun$
#Cisfun$ ls
AUTHORS      function_match_1.c   functions_help_1.c   header.h   match.c        README.md
 built-in.c   function_match_2.c   functions_help_2.c   main.c
#Cisfun$ exit
jairocast2@ubuntu:~/shell$

jairocast2@ubuntu:~/shell$ echo "/bin/ls" | ./Shell
AUTHORS      function_match_1.c   functions_help_1.c   header.h   match.c        README.md
 built-in.c   function_match_2.c   functions_help_2.c   main.c
jairocast2@ubuntu:~/shell$

Command List

Commands	Description
ls	ls (from list), allows you to list the contents of a directory or file.
pwd	Pwd (from print working directory) is a convenient command that prints our path or location when executed, so we avoid getting lost if we are working with multiple directories and folders.
touch	touch creates an empty file, if the file exists it updates the modification time.
rm	rm (from remove) is the command needed to delete a file or directory.
mkdir	mkdir (from make directory) creates a new directory taking into account the current location.
cp	cp (from copy) copies a source file or directory to a target fileor directory.
rmdir	rmdir (from ReMove DIRectory) This command is used to delete empty directories or subdirectories.
cd	cd (from change directory) you will need this command to access a path other than the one you are in. basically it is for navigating from directory to directory.
exit	exits the current shell. 0 status value indicates successful execution, another value represents unsuccessful execution.
cat	cat (from concatenate), is a wonderful utility that allows us to visualize the content of a text file in the standard output, without the need of an editor.

Authors and Github

• Please, read the AUTHORS file
• https://github.com/Ineffable22/simple_shell