10Sstevel@tonic-gate /*
20Sstevel@tonic-gate * CDDL HEADER START
30Sstevel@tonic-gate *
40Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*6812Sraf * Common Development and Distribution License (the "License").
6*6812Sraf * You may not use this file except in compliance with the License.
70Sstevel@tonic-gate *
80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
100Sstevel@tonic-gate * See the License for the specific language governing permissions
110Sstevel@tonic-gate * and limitations under the License.
120Sstevel@tonic-gate *
130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
180Sstevel@tonic-gate *
190Sstevel@tonic-gate * CDDL HEADER END
200Sstevel@tonic-gate */
21*6812Sraf
220Sstevel@tonic-gate /*
23*6812Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
240Sstevel@tonic-gate * Use is subject to license terms.
250Sstevel@tonic-gate */
260Sstevel@tonic-gate
270Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */
280Sstevel@tonic-gate /* All Rights Reserved */
290Sstevel@tonic-gate
30*6812Sraf #pragma ident "%Z%%M% %I% %E% SMI"
310Sstevel@tonic-gate
320Sstevel@tonic-gate /*
330Sstevel@tonic-gate * Seek for standard library. Coordinates with buffering.
340Sstevel@tonic-gate */
350Sstevel@tonic-gate
36*6812Sraf #pragma weak _fseek = fseek
370Sstevel@tonic-gate
38*6812Sraf #include "lint.h"
390Sstevel@tonic-gate #include "file64.h"
400Sstevel@tonic-gate #include "mtlib.h"
410Sstevel@tonic-gate #include <stdio.h>
420Sstevel@tonic-gate #include <errno.h>
430Sstevel@tonic-gate #include <thread.h>
440Sstevel@tonic-gate #include <synch.h>
450Sstevel@tonic-gate #include <unistd.h>
460Sstevel@tonic-gate #include <sys/types.h>
470Sstevel@tonic-gate #include "stdiom.h"
480Sstevel@tonic-gate
490Sstevel@tonic-gate int
fseek(FILE * iop,long offset,int ptrname)500Sstevel@tonic-gate fseek(FILE *iop, long offset, int ptrname)
510Sstevel@tonic-gate {
520Sstevel@tonic-gate off_t p;
530Sstevel@tonic-gate rmutex_t *lk;
540Sstevel@tonic-gate
550Sstevel@tonic-gate FLOCKFILE(lk, iop);
560Sstevel@tonic-gate iop->_flag &= ~_IOEOF;
570Sstevel@tonic-gate
580Sstevel@tonic-gate if (!(iop->_flag & _IOREAD) && !(iop->_flag & (_IOWRT | _IORW))) {
590Sstevel@tonic-gate errno = EBADF;
600Sstevel@tonic-gate FUNLOCKFILE(lk);
610Sstevel@tonic-gate return (-1);
620Sstevel@tonic-gate }
630Sstevel@tonic-gate
640Sstevel@tonic-gate if (iop->_flag & _IOREAD) {
650Sstevel@tonic-gate if (ptrname == 1 && iop->_base && !(iop->_flag&_IONBF)) {
660Sstevel@tonic-gate offset -= iop->_cnt;
670Sstevel@tonic-gate }
680Sstevel@tonic-gate } else if (iop->_flag & (_IOWRT | _IORW)) {
690Sstevel@tonic-gate if (_fflush_u(iop) == EOF) {
700Sstevel@tonic-gate FUNLOCKFILE(lk);
710Sstevel@tonic-gate return (-1);
720Sstevel@tonic-gate }
730Sstevel@tonic-gate }
740Sstevel@tonic-gate iop->_cnt = 0;
750Sstevel@tonic-gate iop->_ptr = iop->_base;
760Sstevel@tonic-gate if (iop->_flag & _IORW) {
770Sstevel@tonic-gate iop->_flag &= ~(_IOREAD | _IOWRT);
780Sstevel@tonic-gate }
790Sstevel@tonic-gate p = lseek(FILENO(iop), (off_t)offset, ptrname);
800Sstevel@tonic-gate FUNLOCKFILE(lk);
810Sstevel@tonic-gate return ((p == (off_t)-1) ? -1: 0);
820Sstevel@tonic-gate }
83