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 #include "lint.h" 28 #include <fcntl.h> 29 #include <errno.h> 30 #include <sys/types.h> 31 #include <sys/stat.h> 32 33 /* 34 * Return the proper Posix error number for a failed (EINVAL) fcntl() operation. 35 */ 36 static int 37 fallocate_errno(int fd) 38 { 39 struct stat64 statb; 40 int error; 41 42 if (fstat64(fd, &statb) != 0) /* can't happen? */ 43 error = EBADF; 44 else if (S_ISFIFO(statb.st_mode)) /* pipe or FIFO */ 45 error = ESPIPE; 46 else if (!S_ISREG(statb.st_mode)) /* not a regular file */ 47 error = ENODEV; 48 else /* the file system doesn't support F_ALLOCSP */ 49 error = EINVAL; 50 51 return (error); 52 } 53 54 int 55 posix_fallocate(int fd, off_t offset, off_t len) 56 { 57 struct flock lck; 58 int error; 59 60 if (offset < 0 || len <= 0) 61 return (EINVAL); 62 63 lck.l_whence = 0; 64 lck.l_start = offset; 65 lck.l_len = len; 66 lck.l_type = F_WRLCK; 67 68 if (fcntl(fd, F_ALLOCSP, &lck) == -1) { 69 if ((error = errno) == EINVAL) 70 error = fallocate_errno(fd); 71 else if (error == EOVERFLOW) 72 error = EFBIG; 73 return (error); 74 } 75 return (0); 76 } 77 78 #if !defined(_LP64) 79 80 int 81 posix_fallocate64(int fd, off64_t offset, off64_t len) 82 { 83 struct flock64 lck; 84 int error; 85 86 if (offset < 0 || len <= 0) 87 return (EINVAL); 88 89 lck.l_whence = 0; 90 lck.l_start = offset; 91 lck.l_len = len; 92 lck.l_type = F_WRLCK; 93 94 if (fcntl(fd, F_ALLOCSP64, &lck) == -1) { 95 if ((error = errno) == EINVAL) 96 error = fallocate_errno(fd); 97 else if (error == EOVERFLOW) 98 error = EFBIG; 99 return (error); 100 } 101 return (0); 102 } 103 104 #endif 105