42sh

42sh is the last shell project of 42. This project aims to introduce us to the development of a shell. It's a group project that I realized with 4 people. We chose to make a posix bash style shell

compile and run

run make && ./42sh

feature required

• simple command (example:ls)
• environement variable (example:$PATH)
• local variable (example:a=b; echo ${a})
• signal management (example:CTRL-C)
• job control (example:ls &)
• temporary variable (example:HOME=/tmp cd)
• simple expansion (example:echo ${PATH})
• expansion of special parameters (example:echo ${?})

operators

• >
• <
• <<
• >>
• <&
• >&
• io_number
• |
• ||
• &&
• ;

builtins

• cd
• echo
• exit
• type
• set
• unset
• export
• jobs
• fg
• bg

line edition

• LEFT AND RIGHT ARROWSmove cursor on the right or left. In select mode, move the select part
• UP AND DOWN ARROWS move in the historic
• DEL clear a character. In select mode, del the select part and exit select mode
• HOME move to the beginning of the line
• END move to the end of the line
• OPT+UP move up
• OPT+DOWN move down
• CTRL-C print new prompt
• CTRL-D del on the right if line in not empty otherwise leaves the shell
• OPT-B move to previous word
• OPT+F move to next word
• OPT+V past the copy line
• OPT+C enter in select mode. In select mode, copy the select part and exit select mode
• OPT+X enter in select mode. In select mode, cut the select part and exit select mode

optional feature

• quoting ” (double quote), ’ (simple quote) et \ (backslash)
• pattern matching (globing) : *, ?, [], !
• tilde expansions and additional formats of parameters
• grouped command and subshell : (), {};
• command substitution : $()
• arithmetic expansion : $(())
• processus substitution : <(), >()
• complete management of the history
• dynamic completion
• Vi and Readline for the line edition
• alias and unalias buitlins
• hash builtin and hashtable for binary
• test builtin

final mark

100/100