[PATCH] cttyhack: print detected ctty name when called without parameters

[Denys Vlasenko]

On Mon, Oct 31, 2011 at 1:15 AM, Alexander Shishkin <virtuoso at slind.org> wrote:
> Sometimes there's a need to figure out the controlling tty from a shell
> script, for example, to obtain a line for getty.
> In this case it's easier
> to call cttyhack than trying to repeat some of the cttyhack's logic.

"cttyhack getty 0 -" should work, right?


> +       /* If it's a /dev/tty, still make sure it's wired to std{in,out,err} */
> +       fd = open_or_warn(console, O_RDWR);
> +       if (fd < 0)
> +               goto ret;
> +       //bb_error_msg("switching to '%s'", console);
> +       dup2(fd, STDIN_FILENO);
> +       dup2(fd, STDOUT_FILENO);
> +       xmove_fd(fd, STDERR_FILENO);

Think what would happen if fd = 1

-- 
vda