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 <string.h>
      20  #include <unistd.h>
      21  #include <hurd.h>
      22  #include <hurd/term.h>
      23  #include <hurd/fd.h>
      24  
      25  /* Store at most BUFLEN characters of the pathname of the terminal FD is
      26     open on in BUF.  Return 0 on success, -1 otherwise.  */
      27  int
      28  __ttyname_r (int fd, char *buf, size_t buflen)
      29  {
      30    error_t err;
      31    char nodename[1024];	/* XXX */
      32    size_t len;
      33  
      34    nodename[0] = '\0';
      35    if (err = HURD_DPORT_USE (fd, __term_get_nodename (port, nodename)))
      36      {
      37        if (err == MIG_BAD_ID || err == EOPNOTSUPP)
      38          err = ENOTTY;
      39        return __hurd_dfail (fd, err), errno;
      40      }
      41  
      42    len = strlen (nodename) + 1;
      43    if (len > buflen)
      44      return __hurd_fail (ERANGE), ERANGE;
      45  
      46    memcpy (buf, nodename, len);
      47    return 0;
      48  }
      49  libc_hidden_def (__ttyname_r)
      50  weak_alias (__ttyname_r, ttyname_r)