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
38int 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