Simple shell

A simple UNIX command interpreter that provides a user interface to access and give orders to the operating system.

Table of contents

• Requirements
• Instalation
• Compilation
• Written in
• Example of use
• Files and functions
• Authors

Requirements

• Ubuntu 14.04 LTS
• gcc version 4.8.4

Instalation

• Clone this repository:

git clone https://github.com/Doniben/simple_shell.git

• Inside the repository, compile.
• Execute:

./hsh

• Or run in non-interactive mode, in this mode:

echo "ls" | ./hsh

Compilation

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

Written in

• GNU Emacs 24.3.1
• C language

Example of use

• Run an executable:

$ /bin/pwd

• Run an executable founded in the $PATH environment variable:

$ pwd

• Run a shell built-in:

$ env

All commands and builtins that you can use are in the manual page.

Files and functions

• main.c - File where all the main functions are called

• prompt.c - File where are the main functions to display the prompt

  • read_line - print the line
  • parsing_line - tokenize and analyze the argument
  • exec_process - execution of process

• path.c - program header file

  • path_av - communicate the route with the command
  • ph_to_dp - function to put te path route into a double pointer
  • number_of_dir - number of directories in the route of path

• builtin.c - Builtin functions

  • _enviro - function that prints the environmental variables
  • salto_linea - Auxiliar function for the use of the command signal

• own_func.c - helper functions for the builtins

  • _strcmp - compare two strings
  • _strcat - concat two strings
  • _strdup - a function that duplicates a string
  • _strlen - function to return the length of a string
  • _putchar - writes the character to stdout

• header.c - The header file

• man_1_simple_shell - Manual page for the simple_shell

• AUTHORS - List of contributors to this repository

Authors

• Doniben Jimenez
• Nicolás Morán