view toys/posix/tty.c @ 1775:57f2a26fa92c draft toast

To ensure that toybox can be installed alongside busybox without confusing update-alternatives, the paths of the links installed by toybox should match those installed by busybox. This is accomplished by changing the flags of a few tools within toybox.
author Paul Barker <paul@paulbarker.me.uk>
date Sat, 04 Apr 2015 11:58:06 -0500
parents bd1225873eb4
children
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/* tty.c - Show stdin's terminal name
 *
 * Copyright 2011 Rob Landley <rob@landley.net>
 *
 * See http://opengroup.org/onlinepubs/9699919799/utilities/tty.html

USE_TTY(NEWTOY(tty, "s", TOYFLAG_USR|TOYFLAG_BIN))

config TTY
  bool "tty"
  default y
  help
    usage: tty [-s]

    Show filename of terminal connected to stdin.

    Prints "not a tty" and exits with nonzero status if no terminal
    is connected to stdin.

    -s	silent, exit code only
*/

#include "toys.h"

void tty_main(void)
{
  char *tty = ttyname(0);

  if (!toys.optflags) puts(tty ? tty : "not a tty");

  toys.exitval = !tty;
}