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 https://opensource.org/licenses/CDDL-1.0.
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 2007 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /*
28 * Copyright (c) 2022 by Information2 Software, Inc. All rights reserved.
29 */
30
31 #include "file_common.h"
32 #include <sys/types.h>
33 #include <unistd.h>
34 #include <fcntl.h>
35 #include <string.h>
36
37 /*
38 * Call fadvise to prefetch data
39 */
40 static const char *execname = "file_fadvise";
41
42 static void
usage(void)43 usage(void)
44 {
45 (void) fprintf(stderr,
46 "usage: %s -f filename -a advise \n", execname);
47 }
48
49 int
main(int argc,char * argv[])50 main(int argc, char *argv[])
51 {
52 char *filename = NULL;
53 int advise = 0;
54 int fd, ch;
55 int err = 0;
56
57 while ((ch = getopt(argc, argv, "a:f:")) != EOF) {
58 switch (ch) {
59 case 'a':
60 advise = atoll(optarg);
61 break;
62 case 'f':
63 filename = optarg;
64 break;
65 case '?':
66 (void) printf("unknown arg %c\n", optopt);
67 usage();
68 break;
69 }
70 }
71
72 if (!filename) {
73 (void) printf("Filename not specified (-f <file>)\n");
74 err++;
75 }
76
77 if (advise < POSIX_FADV_NORMAL || advise > POSIX_FADV_NOREUSE) {
78 (void) printf("advise is invalid\n");
79 err++;
80 }
81
82 if (err) {
83 usage(); /* no return */
84 return (1);
85 }
86
87 if ((fd = open(filename, O_RDWR, 0666)) < 0) {
88 perror("open");
89 return (1);
90 }
91
92 if (posix_fadvise(fd, 0, 0, advise) != 0) {
93 perror("posix_fadvise");
94 close(fd);
95 return (1);
96 }
97
98 close(fd);
99
100 return (0);
101 }
102