0x16. C - Simple Shell

This repository contains the files for a simple_shell project. It can be compiled using GCC and will execute a simple shell that can be used for some basic tasks and programs most commonly found in the /bin/ folder.

Pre-requisites

Authorized functions and macros:

• access (man 2 access)
• chdir (man 2 chdir)
• close (man 2 close)
• closedir (man 3 closedir)
• execve (man 2 execve)
• exit (man 3 exit)
• _exit (man 2 _exit)
• fflush (man 3 fflush)
• fork (man 2 fork)
• free (man 3 free)
• getcwd (man 3 getcwd)
• getline (man 3 getline)
• getpid (man 2 getpid)
• isatty (man 3 isatty)
• kill (man 2 kill)
• malloc (man 3 malloc)
• open (man 2 open)
• opendir (man 3 opendir)
• perror (man 3 perror)
• read (man 2 read)
• readdir (man 3 readdir)
• signal (man 2 signal)
• stat (__xstat) (man 2 stat)
• lstat (__lxstat) (man 2 lstat)
• fstat (__fxstat) (man 2 fstat)
• strtok (man 3 strtok)
• wait (man 2 wait)
• waitpid (man 2 waitpid)
• wait3 (man 2 wait3)
• wait4 (man 2 wait4)
• write (man 2 write)

Compilation

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

This wil compile all the '.c' files and change the output's name to 'hsh'.

Template to test output:

$ ./hsh
($) /bin/ls
hsh main.c shell.c
($)
($) exit
$

• After you clone this repository and compile the program with the command above, you will generate a file called hsh that can be executed by entering ./hsh in your shell.

• The output after the program is executed should look something like this:

$| Where you will get a prompt in the shape of a dollar sign so you can start typing commands into your shell. A good example of how it should execute is the command shown above were the user enters 'ls' and then gets a list of the directory contents.

Function Prototypes:

Brief description of functions contained in project:

_strcmpdir : compares strings to find dir. find_command : finds command to execute in path routes. charput : writes the character like putchar. place : similar to puts in C. _strlen : string length. str_concat : concatenate strings. lookforslash : identify if first char is a '/'. compareExit : checks if user typed exit. compareEnv : checks if user typed env. execute_proc : receives command and args from getline to be executed. identify_string : returns pointer with folder address. prompt : infinite loop with fork to keep prompt going. controlC: avoid program closing when pressing ctrl + c. main: initialize program.

Authors

• Norris Selorm Bedzo | bedzon@ieee.org
• Jonathan Abayie Boahene | jonathanboahene@gmail.com