sysdeps/mach/hurd/ttyname.c

   1 /* Copyright (C) 1994-2018 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.h>
  21 #include <hurd/term.h>
  22 #include <hurd/fd.h>
  23
  24 /* Return the pathname of the terminal FD is open on, or NULL on errors.
  25    The returned storage is good only until the next call to this function.  */
  26 char *
  27 ttyname (int fd)
  28 {
  29   error_t err;
  30   static char nodename[1024];   /* XXX */
  31
  32   nodename[0] = '\0';
  33   if (err = HURD_DPORT_USE (fd, __term_get_nodename (port, nodename)))
  34     {
  35       if (err == MIG_BAD_ID || err == EOPNOTSUPP)
  36         err = ENOTTY;
  37       return __hurd_dfail (fd, err), NULL;
  38     }
  39
  40   return nodename;
  41 }