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 <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. */
27int
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 {
45 errno = ERANGE;
46 return errno;
47 }
48
49 memcpy (buf, nodename, len);
50 return 0;
51}
52libc_hidden_def (__ttyname_r)
53weak_alias (__ttyname_r, ttyname_r)
54

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