minishell

The objective of this project is to create a simple shell.

Task

My shell should:

• Show a prompt when waiting for a new command
• Search and launch the right executable (based on the PATH variable or by using relative or absolute path) like in bash
• It must implement the builtins like in bash:
• echo with option ’-n’
• cd with only a relative or absolute path
• pwd without any options
• export without any options
• unset without any options
• env without any options and any arguments
• exit without any options
• ; in the command should separate commands like in bash
• ’ and " should work like in bash except for multiline commands
• Redirections < > “>>” should work like in bash except for file descriptor aggregation
• Pipes | should work like in bash
• Environment variables ($ followed by characters) should work like in bash
• $? should work like in bash
• ctrl-C, ctrl-D and ctrl-\ should have the same result as in bash

Allowed external functions: malloc, free, write, open, read, close, fork, wait, waitpid, wait3, wait4, signal, kill, exit, getcwd, chdir, stat, lstat, fstat, execve, dup, dup2, pipe, opendir, readdir, closedir, strerror, errno

Other

Authors:
Mark Veligod
Polina Baranovskaya