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 <errno.h> 32 #include <sys/types.h> 33 #include <sys/stat.h> 34 35 /* 36 * Return the proper Posix error number for a failed (EINVAL) fcntl() operation. 37 */ 38 static int 39 fallocate_errno(int fd) 40 { 41 struct stat64 statb; 42 int error; 43 44 if (fstat64(fd, &statb) != 0) /* can't happen? */ 45 error = EBADF; 46 else if (S_ISFIFO(statb.st_mode)) /* pipe or FIFO */ 47 error = ESPIPE; 48 else if (!S_ISREG(statb.st_mode)) /* not a regular file */ 49 error = ENODEV; 50 else /* the file system doesn't support F_ALLOCSP */ 51 error = EINVAL; 52 53 return (error); 54 } 55 56 int 57 posix_fallocate(int fd, off_t offset, off_t len) 58 { 59 struct flock lck; 60 int error; 61 62 if (offset < 0 || len <= 0) 63 return (EINVAL); 64 65 lck.l_whence = 0; 66 lck.l_start = offset; 67 lck.l_len = len; 68 lck.l_type = F_WRLCK; 69 70 if (fcntl(fd, F_ALLOCSP, &lck) == -1) { 71 if ((error = errno) == EINVAL) 72 error = fallocate_errno(fd); 73 else if (error == EOVERFLOW) 74 error = EFBIG; 75 return (error); 76 } 77 return (0); 78 } 79 80 #if !defined(_LP64) 81 82 int 83 posix_fallocate64(int fd, off64_t offset, off64_t len) 84 { 85 struct flock64 lck; 86 int error; 87 88 if (offset < 0 || len <= 0) 89 return (EINVAL); 90 91 lck.l_whence = 0; 92 lck.l_start = offset; 93 lck.l_len = len; 94 lck.l_type = F_WRLCK; 95 96 if (fcntl(fd, F_ALLOCSP64, &lck) == -1) { 97 if ((error = errno) == EINVAL) 98 error = fallocate_errno(fd); 99 else if (error == EOVERFLOW) 100 error = EFBIG; 101 return (error); 102 } 103 return (0); 104 } 105 106 #endif 107