42sh

Bash-like shell. It's a command-line interpreter

Features

• Prompt with line edition
• Builtins: [, alias, bg, cd, echo, exit, export, fc, fg, hash, help, history, jobs, kill, set, source, test, type, unalias, unset
• Executing commands
• Executing command in background &
• Pipe |
• Redirections: >, >>, >&, &>, &>>, >|, <, <<<, <&, &<
• Heredoc: <<, <<-
• Logical operands: && and ||
• Separators: ;, &
• Inhibitors: " (double quote), ' (simple quote) and \
• Environment and local variables: $VAR or ${VAR}
• Control groups and sub-shells: (CMD), {CMD}
• Command substitution: $(CMD)
• Dynamical autocompletion
• History (saved in ~/.42sh.history)
• Tilde expansion and additional parameter formats: ~, ${parameter:-word}, ${parameter:=word}, ${parameter:?word}, ${parameter:+word}, ${#parameter}, ${parameter%}, ${parameter%%}, ${parameter#}, ${parameter##}
• Arithmetic expansion: $(())
• Contextual dynamic completion of commands, built-ins, files, internal and environment variables. Autocompletion for order/built-ins parameters
• The two editing modes of the vi and emacs command line (set -o vi or set -o emacs)
• Shell Script (if, while, until, for, case and function definition)
• PS1/PS2 environment variable to custom shell prompt (wiki)

Installation

Clone current repository into empty folder "42sh"

$>  cd 42sh && make
$>  ./42sh

Rules make

• make compilation of binary executable
• make clean delete all .o files
• make fclean delete all .o files and ./42sh
• make re do fclean then make

Shell

History

Commands	Functions
!!	Last command in history
!word	Look for the last command starting by word
![-]number	Look for the command at index number, - define that the search starts from the end

Alias

Commands	Functions
alias	List all the current aliases set
alias [name[=value] ...]	Sets an alias for name so it replaces as value internally
unalias [-a] name [name ...]	Remove the name arguments of the alias table. -a removes all aliases

Hash table

Commands	Functions
hash	List hash table contents
hash -r	Clear the hash table

Job control

Commands	Functions
jobs [n]	List all the current running jobs, n specify the job you want (the form is in job id form or it can be a numerical value)
fg [n]	Bring the specified job to foreground
bg [n]	Bring the specified job to background

A shell compliant with the POSIX Standard.

Authors

Name	Mail	Github
Aleksandr	ggwin-go@student.21-school.ru	https://github.com/ZaprAlex
Aleksey	dwisoky@student.21-school.ru	https://github.com/TinkiBain
Vladimir	gmelisan@student.21-school.ru	https://github.com/nefyodovve
Danila	jterry@student.21-school.ru	https://github.com/itynol
Kirill	wtalea@student.21-school.ru	https://github.com/wtalea