sysdeps/mach/hurd/isatty.c

   1 /* Copyright (C) 1994, 1995, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <errno.h>
  20 #include <unistd.h>
  21 #include <hurd/fd.h>
  22 #include <hurd/term.h>
  23
  24 /* Return 1 if FD is a terminal, 0 if not.  */
  25 int
  26 __isatty (fd)
  27      int fd;
  28 {
  29   error_t err;
  30   mach_port_t id;
  31
  32   err = HURD_DPORT_USE (fd, __term_getctty (port, &id));
  33   if (! err)
  34     __mach_port_deallocate (__mach_task_self (), id);
  35
  36   return !err;
  37 }
  38
  39 weak_alias (__isatty, isatty)