1 /*-
2 * Copyright (c) 2009 Ed Schouten <ed@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: stable/9/lib/libc/gen/fdevname.c 200133 2009-12-05 18:51:44Z ed $");
29
30 #include "namespace.h"
31 #include <sys/param.h>
32 #include <sys/ioctl.h>
33 #include <stdlib.h>
34 #include "un-namespace.h"
35
36 char *
fdevname_r(int fd,char * buf,int len)37 fdevname_r(int fd, char *buf, int len)
38 {
39 struct fiodgname_arg fgn;
40
41 fgn.buf = buf;
42 fgn.len = len;
43
44 if (_ioctl(fd, FIODGNAME, &fgn) == -1)
45 return (NULL);
46 return (buf);
47 }
48
49 char *
fdevname(int fd)50 fdevname(int fd)
51 {
52 static char buf[SPECNAMELEN + 1];
53
54 return (fdevname_r(fd, buf, sizeof(buf)));
55 }
56