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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 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 * Copyright 2004 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 /* Copyright (c) 1988 AT&T */ 30 /* All Rights Reserved */ 31 32 33 /* 34 * Seek for standard library. Coordinates with buffering. 35 */ 36 37 #include <sys/feature_tests.h> 38 39 #if !defined(_LP64) 40 #pragma weak fseeko64 = _fseeko64 41 #endif 42 #pragma weak fseeko = _fseeko 43 44 #include "synonyms.h" 45 #include "file64.h" 46 #include "mtlib.h" 47 #include <sys/types.h> 48 #include <unistd.h> 49 #include <limits.h> 50 #include <stdio.h> 51 #include <errno.h> 52 #include <thread.h> 53 #include <synch.h> 54 #include "stdiom.h" 55 56 #if !defined(_LP64) 57 int 58 fseeko64(FILE *iop, off64_t offset, int ptrname) 59 { 60 off64_t p; 61 rmutex_t *lk; 62 63 FLOCKFILE(lk, iop); 64 iop->_flag &= ~_IOEOF; 65 66 if (!(iop->_flag & _IOREAD) && !(iop->_flag & (_IOWRT | _IORW))) { 67 errno = EBADF; 68 FUNLOCKFILE(lk); 69 return (-1); 70 } 71 72 if (iop->_flag & _IOREAD) { 73 if (ptrname == 1 && iop->_base && !(iop->_flag&_IONBF)) { 74 offset -= iop->_cnt; 75 } 76 } else if (iop->_flag & (_IOWRT | _IORW)) { 77 if (_fflush_u(iop) == EOF) { 78 FUNLOCKFILE(lk); 79 return (-1); 80 } 81 } 82 iop->_cnt = 0; 83 iop->_ptr = iop->_base; 84 if (iop->_flag & _IORW) { 85 iop->_flag &= ~(_IOREAD | _IOWRT); 86 } 87 p = lseek64(FILENO(iop), offset, ptrname); 88 FUNLOCKFILE(lk); 89 return ((p == -1)? -1: 0); 90 } 91 #endif /* _LP64 */ 92 93 int 94 fseeko(FILE *iop, off_t offset, int ptrname) 95 { 96 return (fseek(iop, offset, ptrname)); 97 } 98