No redirection on built-in

[mbraga-s]

If a built-in is called by the parent pro ess (therefore outside of a fork), redirections aren't applied properly:

echo hi >outfile

cd - >outfile

Even tho infiles aren't considered for the built-ins, they still need to be opened.

[mbraga-s]

Possible fix (needs to be thought out): only changing the file descriptor of the write segments of the built-ins. By default it's one but if an outfile is given the fd changes to that files fd.

void exec_echo (t_data *data, int fd)
{ ...
  write (fd, stuff, sizeof(stuff));
  ...
}

[mbraga-s]

Fixed but will probably need to re-implement when Manuel merges his latest batch of built-in fixes with the rest of minishell