1  /* Copyright (C) 1994-2023 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     <https://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  }