1/* Copyright (C) 1994-2022 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. */
26char *
27ttyname (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}
42

source code of glibc/sysdeps/mach/hurd/ttyname.c