sysdeps/mach/hurd/isatty.c

   1 /* Copyright (C) 1994-2015 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 Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the 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    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <unistd.h>
  20 #include <hurd/fd.h>
  21 #include <hurd/term.h>
  22
  23 /* Return 1 if FD is a terminal, 0 if not.  */
  24 int
  25 __isatty (int fd)
  26 {
  27   error_t err;
  28   mach_port_t id;
  29
  30   err = HURD_DPORT_USE (fd, __term_getctty (port, &id));
  31   if (! err)
  32     __mach_port_deallocate (__mach_task_self (), id);
  33
  34   return !err;
  35 }
  36
  37 weak_alias (__isatty, isatty)