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 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include "lint.h" 30 #include <fcntl.h> 31 #include <sys/types.h> 32 #include <sys/stat.h> 33 #include <errno.h> 34 35 /* 36 * SUSv3 - file advisory information 37 * 38 * This function does nothing, but that's OK because the 39 * Posix specification doesn't require it to do anything 40 * other than return appropriate error numbers. 41 * 42 * In the future, a file system dependent fadvise() or fcntl() 43 * interface, similar to madvise(), should be developed to enable 44 * the kernel to optimize I/O operations based on the given advice. 45 */ 46 47 /* ARGSUSED1 */ 48 int 49 posix_fadvise(int fd, off_t offset, off_t len, int advice) 50 { 51 struct stat64 statb; 52 53 switch (advice) { 54 case POSIX_FADV_NORMAL: 55 case POSIX_FADV_RANDOM: 56 case POSIX_FADV_SEQUENTIAL: 57 case POSIX_FADV_WILLNEED: 58 case POSIX_FADV_DONTNEED: 59 case POSIX_FADV_NOREUSE: 60 break; 61 default: 62 return (EINVAL); 63 } 64 if (len < 0) 65 return (EINVAL); 66 if (fstat64(fd, &statb) != 0) 67 return (EBADF); 68 if (S_ISFIFO(statb.st_mode)) 69 return (ESPIPE); 70 return (0); 71 } 72 73 #if !defined(_LP64) 74 75 /* ARGSUSED1 */ 76 int 77 posix_fadvise64(int fd, off64_t offset, off64_t len, int advice) 78 { 79 struct stat64 statb; 80 81 switch (advice) { 82 case POSIX_FADV_NORMAL: 83 case POSIX_FADV_RANDOM: 84 case POSIX_FADV_SEQUENTIAL: 85 case POSIX_FADV_WILLNEED: 86 case POSIX_FADV_DONTNEED: 87 case POSIX_FADV_NOREUSE: 88 break; 89 default: 90 return (EINVAL); 91 } 92 if (len < 0) 93 return (EINVAL); 94 if (fstat64(fd, &statb) != 0) 95 return (EBADF); 96 if (S_ISFIFO(statb.st_mode)) 97 return (ESPIPE); 98 return (0); 99 } 100 101 #endif 102