c-shell

Simple and well-commented shell written in C for Linux. For exploration deeper into the metal.

Features

• Basic commands: exit, pwd, clear and cd
• Environment management with setenv and unsetenv
• Program invocation with forking and child processes
• I/O redirection (use of dup2 system call) limited to the following:
  <cmd> <args> > <output>
<cmd> <args> < <input> > <output>
• Background execution of programs with &
• Piping implemented (<cmd1> | <cmd2>) via pipe and dup2 syscalls. Multiple piping is allowed.
• SIGINT signal when Ctrl-C is pressed (shell is not exited)

Building (linux)

• Run make at the root directory then ./c-shell to start the shell.