Subject

• Prompt without line edition.
• Builtins cd, echo, exit, env, setenv, unsetenv with there options.
• Executing simple commands with there parameters using PATH.
• Support for redirection >, >>, <and |.
• Logical operand &&and ||.
• Separator ;.

• Inhibitors ", 'and \.
• Advanced redirections: aggregation of file output and heredoc <<.
• Globbing: *, ?, [], {}, etc.
• Backquotes `.
• Subshell with operand ().
• Local variable and builtin unset and export.
• History with builtin historyand ! with options.
• Advanced line edition.
• File descriptors and builtin read with options.
• Dynamical autocompletion.

• Job Control and builtins job, fg, bg and operand &.
• Shell Scripting: bang (!), variable assignements, brace group, if, while, until, for and functions

• Advanced dollar expansion $(..), $((..)), $[..]
• Tilde expansion ~, ~<username>, ~-, ~+
• Range expansion {<START>..<END>} and {<START>..<END>..<INCREMENT>}
• Advanced redirections operator &>, &>>, <>, <<< and |&
• Aliases, builtin alias alias [-p] [name[=value] …] and expansion
• Builtin env advanced options -u name and [name=value]
• Inline variables [name=value] binary [arguments...]
• Binary hashtable
• Rights in the PATH

Usage: ./42sh [option] [script-file] [script arguments...]
ush options:
	--help: this *useful* help message!
ush keymap:
	<ctrl+A|home>: Go to begin of line.
	<ctrl+E|end>: Go to end of line.
	<ctrl+V>: Enter visual mode.
	<ctrl+Y>: Yank in visual mode.
	<ctrl+P>: Paste.
	<ctrl+D>: Exit or delete in visual mode.
	<ctrl+C>: Cancel line edition.
	<ctrl+L>: Clear the screen.
	<shift+[left|right]>: Move per word.
	<shift+[up|down]>: Move per line.
	<up>: Go up in the history.
	<down>: Go down in the history.
	!!: Retype the last command.
	!n: Retype the n command from the begin of history.
	!-n: Retype the -n command from the last command.
	!name: Search for a command beginning with name.