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 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 /* 33 * Seek for standard library. Coordinates with buffering. 34 */ 35 36 #include <sys/feature_tests.h> 37 38 #if !defined(_LP64) 39 #pragma weak _fseeko64 = fseeko64 40 #endif 41 #pragma weak _fseeko = fseeko 42 43 #include "lint.h" 44 #include "file64.h" 45 #include "mtlib.h" 46 #include <sys/types.h> 47 #include <unistd.h> 48 #include <limits.h> 49 #include <stdio.h> 50 #include <errno.h> 51 #include <thread.h> 52 #include <synch.h> 53 #include "stdiom.h" 54 55 #if !defined(_LP64) 56 int 57 fseeko64(FILE *iop, off64_t offset, int ptrname) 58 { 59 off64_t p; 60 rmutex_t *lk; 61 62 FLOCKFILE(lk, iop); 63 iop->_flag &= ~_IOEOF; 64 65 if (!(iop->_flag & _IOREAD) && !(iop->_flag & (_IOWRT | _IORW))) { 66 errno = EBADF; 67 FUNLOCKFILE(lk); 68 return (-1); 69 } 70 71 if (iop->_flag & _IOREAD) { 72 if (ptrname == 1 && iop->_base && !(iop->_flag&_IONBF)) { 73 offset -= iop->_cnt; 74 } 75 } else if (iop->_flag & (_IOWRT | _IORW)) { 76 if (_fflush_u(iop) == EOF) { 77 FUNLOCKFILE(lk); 78 return (-1); 79 } 80 } 81 iop->_cnt = 0; 82 iop->_ptr = iop->_base; 83 if (iop->_flag & _IORW) { 84 iop->_flag &= ~(_IOREAD | _IOWRT); 85 } 86 p = lseek64(FILENO(iop), offset, ptrname); 87 FUNLOCKFILE(lk); 88 return ((p == -1)? -1: 0); 89 } 90 #endif /* _LP64 */ 91 92 int 93 fseeko(FILE *iop, off_t offset, int ptrname) 94 { 95 return (fseek(iop, offset, ptrname)); 96 } 97