1 // SPDX-License-Identifier: CDDL-1.0 2 /* 3 * CDDL HEADER START 4 * 5 * The contents of this file are subject to the terms of the 6 * Common Development and Distribution License (the "License"). 7 * You may not use this file except in compliance with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or https://opensource.org/licenses/CDDL-1.0. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 23 /* 24 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 /* 29 * Copyright (c) 2022 by Information2 Software, Inc. All rights reserved. 30 */ 31 32 #include "file_common.h" 33 #include <sys/types.h> 34 #include <unistd.h> 35 #include <fcntl.h> 36 #include <string.h> 37 38 /* 39 * Call fadvise to prefetch data 40 */ 41 static const char *execname = "file_fadvise"; 42 43 static void 44 usage(void) 45 { 46 (void) fprintf(stderr, 47 "usage: %s -f filename -a advise \n", execname); 48 } 49 50 int 51 main(int argc, char *argv[]) 52 { 53 char *filename = NULL; 54 int advise = 0; 55 int fd, ch; 56 int err = 0; 57 58 while ((ch = getopt(argc, argv, "a:f:")) != EOF) { 59 switch (ch) { 60 case 'a': 61 advise = atoll(optarg); 62 break; 63 case 'f': 64 filename = optarg; 65 break; 66 case '?': 67 (void) printf("unknown arg %c\n", optopt); 68 usage(); 69 break; 70 } 71 } 72 73 if (!filename) { 74 (void) printf("Filename not specified (-f <file>)\n"); 75 err++; 76 } 77 78 if (advise < POSIX_FADV_NORMAL || advise > POSIX_FADV_NOREUSE) { 79 (void) printf("advise is invalid\n"); 80 err++; 81 } 82 83 if (err) { 84 usage(); /* no return */ 85 return (1); 86 } 87 88 if ((fd = open(filename, O_RDWR, 0666)) < 0) { 89 perror("open"); 90 return (1); 91 } 92 93 if (posix_fadvise(fd, 0, 0, advise) != 0) { 94 perror("posix_fadvise"); 95 close(fd); 96 return (1); 97 } 98 99 close(fd); 100 101 return (0); 102 } 103