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
57257d1b4Sraf * Common Development and Distribution License (the "License").
67257d1b4Sraf * 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 */
217257d1b4Sraf
227c478bd9Sstevel@tonic-gate /*
237257d1b4Sraf * 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 */
28*cd62a92dSRobert Mustacchi /* All Rights Reserved */
297c478bd9Sstevel@tonic-gate
307c478bd9Sstevel@tonic-gate /*
317c478bd9Sstevel@tonic-gate * Seek for standard library. Coordinates with buffering.
327c478bd9Sstevel@tonic-gate */
337c478bd9Sstevel@tonic-gate
347257d1b4Sraf #pragma weak _fseek = fseek
357c478bd9Sstevel@tonic-gate
367257d1b4Sraf #include "lint.h"
377c478bd9Sstevel@tonic-gate #include "file64.h"
387c478bd9Sstevel@tonic-gate #include "mtlib.h"
397c478bd9Sstevel@tonic-gate #include <stdio.h>
407c478bd9Sstevel@tonic-gate #include <errno.h>
417c478bd9Sstevel@tonic-gate #include <thread.h>
427c478bd9Sstevel@tonic-gate #include <synch.h>
437c478bd9Sstevel@tonic-gate #include <unistd.h>
447c478bd9Sstevel@tonic-gate #include <sys/types.h>
457c478bd9Sstevel@tonic-gate #include "stdiom.h"
467c478bd9Sstevel@tonic-gate
477c478bd9Sstevel@tonic-gate int
fseek(FILE * iop,long offset,int ptrname)487c478bd9Sstevel@tonic-gate fseek(FILE *iop, long offset, int ptrname)
497c478bd9Sstevel@tonic-gate {
507c478bd9Sstevel@tonic-gate off_t p;
517c478bd9Sstevel@tonic-gate rmutex_t *lk;
527c478bd9Sstevel@tonic-gate
537c478bd9Sstevel@tonic-gate FLOCKFILE(lk, iop);
547c478bd9Sstevel@tonic-gate iop->_flag &= ~_IOEOF;
557c478bd9Sstevel@tonic-gate
567c478bd9Sstevel@tonic-gate if (!(iop->_flag & _IOREAD) && !(iop->_flag & (_IOWRT | _IORW))) {
577c478bd9Sstevel@tonic-gate errno = EBADF;
587c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk);
597c478bd9Sstevel@tonic-gate return (-1);
607c478bd9Sstevel@tonic-gate }
617c478bd9Sstevel@tonic-gate
627c478bd9Sstevel@tonic-gate if (iop->_flag & _IOREAD) {
637c478bd9Sstevel@tonic-gate if (ptrname == 1 && iop->_base && !(iop->_flag&_IONBF)) {
647c478bd9Sstevel@tonic-gate offset -= iop->_cnt;
657c478bd9Sstevel@tonic-gate }
667c478bd9Sstevel@tonic-gate } else if (iop->_flag & (_IOWRT | _IORW)) {
677c478bd9Sstevel@tonic-gate if (_fflush_u(iop) == EOF) {
687c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk);
697c478bd9Sstevel@tonic-gate return (-1);
707c478bd9Sstevel@tonic-gate }
717c478bd9Sstevel@tonic-gate }
727c478bd9Sstevel@tonic-gate iop->_cnt = 0;
737c478bd9Sstevel@tonic-gate iop->_ptr = iop->_base;
747c478bd9Sstevel@tonic-gate if (iop->_flag & _IORW) {
757c478bd9Sstevel@tonic-gate iop->_flag &= ~(_IOREAD | _IOWRT);
767c478bd9Sstevel@tonic-gate }
77*cd62a92dSRobert Mustacchi p = _xseek(iop, (off_t)offset, ptrname);
787c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk);
797c478bd9Sstevel@tonic-gate return ((p == (off_t)-1) ? -1: 0);
807c478bd9Sstevel@tonic-gate }
81