1 /* ----------------------------------------------------------------------- *
2 *
3 * Copyright 2005-2008 H. Peter Anvin - All Rights Reserved
4 *
5 * Permission is hereby granted, free of charge, to any person
6 * obtaining a copy of this software and associated documentation
7 * files (the "Software"), to deal in the Software without
8 * restriction, including without limitation the rights to use,
9 * copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom
11 * the Software is furnished to do so, subject to the following
12 * conditions:
13 *
14 * The above copyright notice and this permission notice shall
15 * be included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
19 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
21 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
22 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 *
26 * ----------------------------------------------------------------------- */
27
28 /*
29 * fstat.c
30 *
31 * Very trivial fstat emulation
32 */
33
34 #include <sys/stat.h>
35 #include <errno.h>
36 #include "file.h"
37
fstat(int fd,struct stat * buf)38 int fstat(int fd, struct stat *buf)
39 {
40 struct file_info *fp = &__file_info[fd];
41
42 if (fd >= NFILES || !fp->iop) {
43 errno = EBADF;
44 return -1;
45 }
46
47 if (fp->iop->flags & __DEV_FILE) {
48 if (fp->i.fd.size == (uint32_t) - 1) {
49 /* File of unknown length, report it as a socket
50 (it probably really is, anyway!) */
51 buf->st_mode = S_IFSOCK | 0444;
52 buf->st_size = 0;
53 } else {
54 buf->st_mode = S_IFREG | 0444;
55 buf->st_size = fp->i.fd.size;
56 }
57 } else {
58 buf->st_mode = S_IFCHR | 0666;
59 buf->st_size = 0;
60 }
61
62 return 0;
63 }
64