Simple_Shell

It would be great to create your own shell right? in this repository we want to show you how we build a simple_shell for our final term work at holberton school.

where we will use calls to the system that will help us get our simple_shell to have a behavior similar to a unix shell, and we will develop everything in the C language.

Do you know what a shell is?

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shell is nothing more than our portal or means to communicate with the operating system services. three types of shell:

• Text lines (CLI, Command-Line Interface, command line interface),

flow chart

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test the operation of our simple_shell!

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• Clone this repo:

   $ git clone https://github.com/ronald0204/simple_shell.git

• Compile with

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

• run manual

   $ man ./man_1_simple_shell

• Execute it:

    $ ./hsh

Testing

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• The shell should work like this in interactive mode:

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

• But also in non-interactive mode:

  $ echo "/bin/ls" | ./hsh
  hsh main.c shell.c test_ls_2
  $
  $ cat test_ls_2
  /bin/ls
  /bin/ls
  $
  $ cat test_ls_2 | ./hsh
  hsh main.c shell.c test_ls_2
  hsh main.c shell.c test_ls_2
  $

List of allowed functions and system calls for this project

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• 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)
• 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)

File

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In this shell project, the following functions were utilized:

File	Contents
_getenv.c	Function to get the PATH env
chek_builtin.c	Checks if the argument is a builtin
execute_cmd.c	Execute - function to execute, implement fork and child process
get_line.c	Functions get input from stdin and tokenize
include_path.c	Function separate the path in new strings
man_1_simple_shell	Simple_shell usage manual
shell.h	Header file with libraries and prototypes
simple_shell.c	Creates a child process in which it executes the command
string_funtion.c	Concatenates two strings
tok_string.c	Function separate the string in new strings

Authors

GitHub: cristian-bedoya Twitter: @crisbedbla GitHub@ronald0204 Twiitter: @ronald45251997