1 /* Determine name of a terminal.
3 Copyright (C) 2010 Free Software Foundation, Inc.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
18 /* Written by Bruno Haible <bruno@clisp.org>, 2010. */
29 ttyname_r (int fd, char *buf, size_t buflen)
32 /* When ttyname_r exists and works, use it.
33 But on Solaris 10, ttyname_r is broken: it returns NULL in situations
34 when ttyname finds the result. */
35 #if HAVE_TTYNAME_R && !defined __sun
36 /* This code is multithread-safe. */
37 char *name = ttyname_r (fd, buf, buflen <= INT_MAX ? buflen : INT_MAX);
42 size_t namelen = strlen (name) + 1;
45 memmove (buf, name, namelen);
49 /* Note: This is not multithread-safe. */
56 namelen = strlen (name) + 1;
59 memcpy (buf, name, namelen);
62 /* Platforms like mingw: no ttys exist at all. */