98 lines
2.0 KiB
C
98 lines
2.0 KiB
C
|
/*
|
||
|
|
* CDDL HEADER START
|
||
|
|
*
|
||
|
|
* The contents of this file are subject to the terms of the
|
||
|
|
* Common Development and Distribution License (the "License").
|
||
|
|
* You may not use this file except in compliance with the License.
|
||
|
|
*
|
||
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
||
|
|
* or https://opensource.org/licenses/CDDL-1.0.
|
||
|
|
* See the License for the specific language governing permissions
|
||
|
|
* and limitations under the License.
|
||
|
|
*
|
||
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
||
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
||
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
||
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
||
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
||
|
|
*
|
||
|
|
* CDDL HEADER END
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
|
||
|
|
* Use is subject to license terms.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright (c) 2022 by Information2 Software, Inc. All rights reserved.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "file_common.h"
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Call fadvise to prefetch data
|
||
|
|
*/
|
||
|
|
static const char *execname = "file_fadvise";
|
||
|
|
|
||
|
|
static void
|
||
|
|
usage(void)
|
||
|
|
{
|
||
|
|
(void) fprintf(stderr,
|
||
|
|
"usage: %s -f filename -a advise \n", execname);
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
main(int argc, char *argv[])
|
||
|
|
{
|
||
|
|
char *filename = NULL;
|
||
|
|
int advise = 0;
|
||
|
|
int fd, ch;
|
||
|
|
int err = 0;
|
||
|
|
|
||
|
|
while ((ch = getopt(argc, argv, "a:f:")) != EOF) {
|
||
|
|
switch (ch) {
|
||
|
|
case 'a':
|
||
|
|
advise = atoll(optarg);
|
||
|
|
break;
|
||
|
|
case 'f':
|
||
|
|
filename = optarg;
|
||
|
|
break;
|
||
|
|
case '?':
|
||
|
|
(void) printf("unknown arg %c\n", optopt);
|
||
|
|
usage();
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!filename) {
|
||
|
|
(void) printf("Filename not specified (-f <file>)\n");
|
||
|
|
err++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (advise < POSIX_FADV_NORMAL || advise > POSIX_FADV_NOREUSE) {
|
||
|
|
(void) printf("advise is invalid\n");
|
||
|
|
err++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (err) {
|
||
|
|
usage(); /* no return */
|
||
|
|
return (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((fd = open(filename, O_RDWR, 0666)) < 0) {
|
||
|
|
perror("open");
|
||
|
|
return (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
posix_fadvise(fd, 0, 0, advise);
|
||
|
|
|
||
|
|
close(fd);
|
||
|
|
|
||
|
|
return (0);
|
||
|
|
}
|