1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
/* Determine name of a terminal.
Copyright (C) 2010 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2010. */
#include <config.h>
#include <unistd.h>
#include <errno.h>
#include <limits.h>
#include <string.h>
int
ttyname_r (int fd, char *buf, size_t buflen)
#undef ttyname_r
{
/* When ttyname_r exists and works, use it.
But on Solaris 10, ttyname_r is broken: it returns NULL in situations
when ttyname finds the result. */
#if HAVE_TTYNAME_R && !defined __sun
/* This code is multithread-safe. */
char *name = ttyname_r (fd, buf, buflen <= INT_MAX ? buflen : INT_MAX);
if (name == NULL)
return errno;
if (name != buf)
{
size_t namelen = strlen (name) + 1;
if (namelen > buflen)
return ERANGE;
memmove (buf, name, namelen);
}
return 0;
#elif HAVE_TTYNAME
/* Note: This is not multithread-safe. */
char *name;
size_t namelen;
name = ttyname (fd);
if (name == NULL)
return errno;
namelen = strlen (name) + 1;
if (namelen > buflen)
return ERANGE;
memcpy (buf, name, namelen);
return 0;
#else
/* Platforms like mingw: no ttys exist at all. */
return ENOTTY;
#endif
}
|
