2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Alex Hornung <ahornung@gmail.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include "namespace.h"
35 #include <sys/types.h>
44 #include <machine/stdint.h>
46 #include <sys/ioctl.h>
47 #include "reentrant.h"
48 #include "un-namespace.h"
50 #include "libc_private.h"
52 static char fdevname_buf[sizeof(_PATH_DEV) + NAME_MAX];
54 static once_t fdevname_init_once = ONCE_INITIALIZER;
55 static thread_key_t fdevname_key;
56 static int fdevname_keycreated = 0;
59 fdevname_r(int fd, char *buf, size_t len)
62 struct fiodname_args fa;
66 /* Must be a valid file descriptor */
70 /* Must be a character device */
71 if (!S_ISCHR(sb.st_mode))
76 if (_ioctl(fd, FIODNAME, &fa) == -1) {
83 fdevname_keycreate(void)
85 fdevname_keycreated = (thr_keycreate(&fdevname_key, free) == 0);
97 if (thr_once(&fdevname_init_once, fdevname_keycreate) != 0 ||
100 if ((buf = thr_getspecific(fdevname_key)) == NULL) {
101 if ((buf = malloc(sizeof fdevname_buf)) == NULL)
103 if (thr_setspecific(fdevname_key, buf) != 0) {
110 if (((error = fdevname_r(fd, buf, sizeof fdevname_buf))) != 0) {