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
5a5f69788Scraigm * Common Development and Distribution License (the "License").
6a5f69788Scraigm * 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 */
21a5f69788Scraigm
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 */
28cd62a92dSRobert Mustacchi /* All Rights Reserved */
297c478bd9Sstevel@tonic-gate
30cd62a92dSRobert Mustacchi /*
31cd62a92dSRobert Mustacchi * Copyright 2020 Robert Mustacchi
32*06ca4e39SAndy Fiddaman * Copyright 2022 OmniOS Community Edition (OmniOSce) Association.
33cd62a92dSRobert Mustacchi */
34a5f69788Scraigm
357257d1b4Sraf #include "lint.h"
367c478bd9Sstevel@tonic-gate #include "file64.h"
377c478bd9Sstevel@tonic-gate #include "mtlib.h"
387c478bd9Sstevel@tonic-gate #include <sys/types.h>
39*06ca4e39SAndy Fiddaman #include <errno.h>
407c478bd9Sstevel@tonic-gate #include <stdio.h>
417c478bd9Sstevel@tonic-gate #include <stdlib.h>
427c478bd9Sstevel@tonic-gate #include <thread.h>
437c478bd9Sstevel@tonic-gate #include <synch.h>
447c478bd9Sstevel@tonic-gate #include "stdiom.h"
457c478bd9Sstevel@tonic-gate
467c478bd9Sstevel@tonic-gate void
setbuf(FILE * iop,char * abuf)477c478bd9Sstevel@tonic-gate setbuf(FILE *iop, char *abuf)
487c478bd9Sstevel@tonic-gate {
497c478bd9Sstevel@tonic-gate Uchar *buf = (Uchar *)abuf;
50cd62a92dSRobert Mustacchi int fno = _get_fd(iop); /* file number */
517c478bd9Sstevel@tonic-gate int size = BUFSIZ - _SMBFSZ;
527c478bd9Sstevel@tonic-gate Uchar *temp;
537c478bd9Sstevel@tonic-gate rmutex_t *lk;
547c478bd9Sstevel@tonic-gate
557c478bd9Sstevel@tonic-gate FLOCKFILE(lk, iop);
56cd62a92dSRobert Mustacchi if ((iop->_base != NULL) && (iop->_flag & _IOMYBUF))
577c478bd9Sstevel@tonic-gate free((char *)iop->_base - PUSHBACK);
587c478bd9Sstevel@tonic-gate iop->_flag &= ~(_IOMYBUF | _IONBF | _IOLBF);
59cd62a92dSRobert Mustacchi if (buf == NULL) {
607c478bd9Sstevel@tonic-gate iop->_flag |= _IONBF;
61cd62a92dSRobert Mustacchi if (fno == 0 || fno == 1) {
627c478bd9Sstevel@tonic-gate /* use special buffer for std{in,out} */
637c478bd9Sstevel@tonic-gate buf = (fno == 0) ? _sibuf : _sobuf;
64cd62a92dSRobert Mustacchi } else if (fno >= 2 && fno < _NFILE) {
657c478bd9Sstevel@tonic-gate buf = _smbuf[fno];
667c478bd9Sstevel@tonic-gate size = _SMBFSZ - PUSHBACK;
67cd62a92dSRobert Mustacchi } else if ((buf = (Uchar *)malloc(_SMBFSZ *
68cd62a92dSRobert Mustacchi sizeof (Uchar))) != NULL) {
697c478bd9Sstevel@tonic-gate iop->_flag |= _IOMYBUF;
707c478bd9Sstevel@tonic-gate size = _SMBFSZ - PUSHBACK;
717c478bd9Sstevel@tonic-gate }
727c478bd9Sstevel@tonic-gate } else { /* regular buffered I/O, standard buffer size */
73*06ca4e39SAndy Fiddaman if (fno != -1) {
74*06ca4e39SAndy Fiddaman /*
75*06ca4e39SAndy Fiddaman * isatty(3C) will set errno as a side-effect of
76*06ca4e39SAndy Fiddaman * returning 0. Hide this from callers so that they do
77*06ca4e39SAndy Fiddaman * not see errno changing for no apparent reason.
78*06ca4e39SAndy Fiddaman */
79*06ca4e39SAndy Fiddaman int err = errno;
80*06ca4e39SAndy Fiddaman if (isatty(fno) != 0)
81*06ca4e39SAndy Fiddaman iop->_flag |= _IOLBF;
82*06ca4e39SAndy Fiddaman errno = err;
83*06ca4e39SAndy Fiddaman }
847c478bd9Sstevel@tonic-gate }
85cd62a92dSRobert Mustacchi if (buf == NULL) {
867c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk);
877c478bd9Sstevel@tonic-gate return; /* malloc() failed */
887c478bd9Sstevel@tonic-gate }
897c478bd9Sstevel@tonic-gate temp = buf + PUSHBACK;
907c478bd9Sstevel@tonic-gate iop->_base = temp;
917c478bd9Sstevel@tonic-gate _setbufend(iop, temp + size);
927c478bd9Sstevel@tonic-gate iop->_ptr = temp;
937c478bd9Sstevel@tonic-gate iop->_cnt = 0;
947c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk);
957c478bd9Sstevel@tonic-gate }
96