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 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * Seek for standard library. Coordinates with buffering. 32 */ 33 34 #include <sys/feature_tests.h> 35 36 #if !defined(_LP64) 37 #pragma weak _fseeko64 = fseeko64 38 #endif 39 #pragma weak _fseeko = fseeko 40 41 #include "lint.h" 42 #include "file64.h" 43 #include "mtlib.h" 44 #include <sys/types.h> 45 #include <unistd.h> 46 #include <limits.h> 47 #include <stdio.h> 48 #include <errno.h> 49 #include <thread.h> 50 #include <synch.h> 51 #include "stdiom.h" 52 53 #if !defined(_LP64) 54 int 55 fseeko64(FILE *iop, off64_t offset, int ptrname) 56 { 57 off64_t p; 58 rmutex_t *lk; 59 60 FLOCKFILE(lk, iop); 61 iop->_flag &= ~_IOEOF; 62 63 if (!(iop->_flag & _IOREAD) && !(iop->_flag & (_IOWRT | _IORW))) { 64 errno = EBADF; 65 FUNLOCKFILE(lk); 66 return (-1); 67 } 68 69 if (iop->_flag & _IOREAD) { 70 if (ptrname == 1 && iop->_base && !(iop->_flag&_IONBF)) { 71 offset -= iop->_cnt; 72 } 73 } else if (iop->_flag & (_IOWRT | _IORW)) { 74 if (_fflush_u(iop) == EOF) { 75 FUNLOCKFILE(lk); 76 return (-1); 77 } 78 } 79 iop->_cnt = 0; 80 iop->_ptr = iop->_base; 81 if (iop->_flag & _IORW) { 82 iop->_flag &= ~(_IOREAD | _IOWRT); 83 } 84 p = _xseek64(iop, offset, ptrname); 85 FUNLOCKFILE(lk); 86 return ((p == -1)? -1: 0); 87 } 88 #endif /* _LP64 */ 89 90 int 91 fseeko(FILE *iop, off_t offset, int ptrname) 92 { 93 return (fseek(iop, offset, ptrname)); 94 } 95