1 /* ----------------------------------------------------------------------- *
2 *
3 * Copyright 2004-2008 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 * close.c
30 */
31
32 #include <errno.h>
33 #include <com32.h>
34 #include <string.h>
35 #include "file.h"
36
close(int fd)37 int close(int fd)
38 {
39 struct file_info *fp = &__file_info[fd];
40 int rv = 0;
41
42 if (fd >= NFILES || !fp->iop || !fp->oop) {
43 errno = EBADF;
44 return -1;
45 }
46
47 if (fp->iop->close) {
48 rv = fp->iop->close(fp);
49 if (rv)
50 return rv;
51 }
52 fp->iop = &dev_error_r;
53
54 if (fp->oop->close) {
55 rv = fp->oop->close(fp);
56 if (rv)
57 return rv;
58 }
59
60 memset(fp, 0, sizeof *fp); /* File structure unused */
61 return 0;
62 }
63