1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include "lint.h"
28 #include <fcntl.h>
29 #include <sys/types.h>
30 #include <sys/stat.h>
31 #include <errno.h>
32
33 /*
34 * SUSv3 - file advisory information
35 *
36 * This function does nothing, but that's OK because the
37 * Posix specification doesn't require it to do anything
38 * other than return appropriate error numbers.
39 *
40 * In the future, a file system dependent fadvise() or fcntl()
41 * interface, similar to madvise(), should be developed to enable
42 * the kernel to optimize I/O operations based on the given advice.
43 */
44
45 int
posix_fadvise(int fd,off_t offset __unused,off_t len,int advice)46 posix_fadvise(int fd, off_t offset __unused, off_t len, int advice)
47 {
48 struct stat64 statb;
49
50 switch (advice) {
51 case POSIX_FADV_NORMAL:
52 case POSIX_FADV_RANDOM:
53 case POSIX_FADV_SEQUENTIAL:
54 case POSIX_FADV_WILLNEED:
55 case POSIX_FADV_DONTNEED:
56 case POSIX_FADV_NOREUSE:
57 break;
58 default:
59 return (EINVAL);
60 }
61 if (len < 0)
62 return (EINVAL);
63 if (fstat64(fd, &statb) != 0)
64 return (EBADF);
65 if (S_ISFIFO(statb.st_mode))
66 return (ESPIPE);
67 return (0);
68 }
69
70 #if !defined(_LP64)
71
72 int
posix_fadvise64(int fd,off64_t offset __unused,off64_t len,int advice)73 posix_fadvise64(int fd, off64_t offset __unused, off64_t len, int advice)
74 {
75 struct stat64 statb;
76
77 switch (advice) {
78 case POSIX_FADV_NORMAL:
79 case POSIX_FADV_RANDOM:
80 case POSIX_FADV_SEQUENTIAL:
81 case POSIX_FADV_WILLNEED:
82 case POSIX_FADV_DONTNEED:
83 case POSIX_FADV_NOREUSE:
84 break;
85 default:
86 return (EINVAL);
87 }
88 if (len < 0)
89 return (EINVAL);
90 if (fstat64(fd, &statb) != 0)
91 return (EBADF);
92 if (S_ISFIFO(statb.st_mode))
93 return (ESPIPE);
94 return (0);
95 }
96
97 #endif
98