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This project is a mini-shell, based on the bash behavior, we implemented a lot of the bash functionality, using various fundamental concepts and system-calls.

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Minishell 💻

As beautiful as a shell

About

  • Minishell is a project at school 42.

  • The objective of this project is to create a simple shell to learn a lot about processes and file descriptors.

  • The existence of shells is linked to the very existence of IT. At the time, all coders agreed that communicating with a computer using aligned 1/0 switches was seriously irritating. It was only logical that they came up with the idea to communicate with a computer using interactive lines of commands in a language somewhat close to english. With Minishell, you’ll be able to travel through time and come back to problems people faced when Windows didn’t exist.

Functions

Only the following functions are allowed to be used in this project:

Function Description Function Description
readline read a line from the terminal lstat get file status
rl_clear_history clear the history list by deleting all of the entries fstat get file status by fd
rl_on_new_line tell the update routines that we have moved onto a new line unlink remove a specified file
rl_replace_line replace the contents of rl_line_buffer with text execve execute program
rl_redisplay change what's displayed on the screen dup duplicate a file descriptor
add_history save the line in a history list of lines dup2 duplicate a file descriptor
printf format and print data pipe create pipe
malloc allocate dynamic memory opendir open a directory
free free dynamic memory readdir read a directory
write write to a file descriptor closedir close a directory
access check user's permissions for a file strerror return string describing error number
open open and can create a file perror print a system error message
read read from a file descriptor isatty test whether a file descriptor refers to a terminal
close close a file descriptor ttyname return name of a terminal
fork create a child process ttyslot find the slot of the current user's terminal in some file
wait wait for process to change state ioctl control device
waitpid wait for process to change state getenv get an environment variable
wait3 wait for process to change state tcsetattr control asynchronous communications ports
wait4 wait for process to change state tcgetattr control asynchronous communications ports
signal ANSI C signal handling tgetent termcap database emulation
sigaction examine and change a signal action tgetflag termcap database emulation
kill send signal to a process tgetnum termcap database emulation
exit cause normal process termination tgetstr termcap database emulation
getcwd get current working directory tgoto termcap database emulation
chdir change working directory tputs curses interfaces to terminfo database
stat get file status by pathname

Starting

# Clone this project
$ git clone https://github.com/Mounadi05/42_Minishell

# Access
$ cd 42_Minishell

# Compile the project
$ make

# Compile the project in linux 
$ make linux 

# Run the project
$ ./minishell

About

This project is a mini-shell, based on the bash behavior, we implemented a lot of the bash functionality, using various fundamental concepts and system-calls.

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