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 43 usage(void) 44 { 45 (void) fprintf(stderr, 46 "usage: %s -f filename -a advise \n", execname); 47 } 48 49 int 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