Exit

• Similarly exit

• An exit command would be useless

• It would fork a subprocess, and call exit on the subprocess

        %builtin = (cd => sub { chdir $_[0] 
                                  || warn "Couldn't chdir to $_[0]: $!\n"; },
                    exit => sub { exit $_[0] || 0 },
                   );

• Only a few commands must be implemented as shell built-ins

• umask is another example

Next

26