17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7257d1b4Sraf * Common Development and Distribution License (the "License"). 6*7257d1b4Sraf * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 21*7257d1b4Sraf 227c478bd9Sstevel@tonic-gate /* 23*7257d1b4Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 277c478bd9Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */ 287c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 297c478bd9Sstevel@tonic-gate 30*7257d1b4Sraf #pragma ident "%Z%%M% %I% %E% SMI" 317c478bd9Sstevel@tonic-gate 327c478bd9Sstevel@tonic-gate /* 337c478bd9Sstevel@tonic-gate * Seek for standard library. Coordinates with buffering. 347c478bd9Sstevel@tonic-gate */ 357c478bd9Sstevel@tonic-gate 36*7257d1b4Sraf #pragma weak _fseek = fseek 377c478bd9Sstevel@tonic-gate 38*7257d1b4Sraf #include "lint.h" 397c478bd9Sstevel@tonic-gate #include "file64.h" 407c478bd9Sstevel@tonic-gate #include "mtlib.h" 417c478bd9Sstevel@tonic-gate #include <stdio.h> 427c478bd9Sstevel@tonic-gate #include <errno.h> 437c478bd9Sstevel@tonic-gate #include <thread.h> 447c478bd9Sstevel@tonic-gate #include <synch.h> 457c478bd9Sstevel@tonic-gate #include <unistd.h> 467c478bd9Sstevel@tonic-gate #include <sys/types.h> 477c478bd9Sstevel@tonic-gate #include "stdiom.h" 487c478bd9Sstevel@tonic-gate 497c478bd9Sstevel@tonic-gate int 507c478bd9Sstevel@tonic-gate fseek(FILE *iop, long offset, int ptrname) 517c478bd9Sstevel@tonic-gate { 527c478bd9Sstevel@tonic-gate off_t p; 537c478bd9Sstevel@tonic-gate rmutex_t *lk; 547c478bd9Sstevel@tonic-gate 557c478bd9Sstevel@tonic-gate FLOCKFILE(lk, iop); 567c478bd9Sstevel@tonic-gate iop->_flag &= ~_IOEOF; 577c478bd9Sstevel@tonic-gate 587c478bd9Sstevel@tonic-gate if (!(iop->_flag & _IOREAD) && !(iop->_flag & (_IOWRT | _IORW))) { 597c478bd9Sstevel@tonic-gate errno = EBADF; 607c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk); 617c478bd9Sstevel@tonic-gate return (-1); 627c478bd9Sstevel@tonic-gate } 637c478bd9Sstevel@tonic-gate 647c478bd9Sstevel@tonic-gate if (iop->_flag & _IOREAD) { 657c478bd9Sstevel@tonic-gate if (ptrname == 1 && iop->_base && !(iop->_flag&_IONBF)) { 667c478bd9Sstevel@tonic-gate offset -= iop->_cnt; 677c478bd9Sstevel@tonic-gate } 687c478bd9Sstevel@tonic-gate } else if (iop->_flag & (_IOWRT | _IORW)) { 697c478bd9Sstevel@tonic-gate if (_fflush_u(iop) == EOF) { 707c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk); 717c478bd9Sstevel@tonic-gate return (-1); 727c478bd9Sstevel@tonic-gate } 737c478bd9Sstevel@tonic-gate } 747c478bd9Sstevel@tonic-gate iop->_cnt = 0; 757c478bd9Sstevel@tonic-gate iop->_ptr = iop->_base; 767c478bd9Sstevel@tonic-gate if (iop->_flag & _IORW) { 777c478bd9Sstevel@tonic-gate iop->_flag &= ~(_IOREAD | _IOWRT); 787c478bd9Sstevel@tonic-gate } 797c478bd9Sstevel@tonic-gate p = lseek(FILENO(iop), (off_t)offset, ptrname); 807c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk); 817c478bd9Sstevel@tonic-gate return ((p == (off_t)-1) ? -1: 0); 827c478bd9Sstevel@tonic-gate } 83