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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
/*
* Copyright 2020 Robert Mustacchi
*/
#include "lint.h"
#include "file64.h"
#include "mtlib.h"
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <thread.h>
#include <synch.h>
#include "stdiom.h"
void
setbuf(FILE *iop, char *abuf)
{
Uchar *buf = (Uchar *)abuf;
int fno = _get_fd(iop); /* file number */
int size = BUFSIZ - _SMBFSZ;
Uchar *temp;
rmutex_t *lk;
FLOCKFILE(lk, iop);
if ((iop->_base != NULL) && (iop->_flag & _IOMYBUF))
free((char *)iop->_base - PUSHBACK);
iop->_flag &= ~(_IOMYBUF | _IONBF | _IOLBF);
if (buf == NULL) {
iop->_flag |= _IONBF;
if (fno == 0 || fno == 1) {
/* use special buffer for std{in,out} */
buf = (fno == 0) ? _sibuf : _sobuf;
} else if (fno >= 2 && fno < _NFILE) {
buf = _smbuf[fno];
size = _SMBFSZ - PUSHBACK;
} else if ((buf = (Uchar *)malloc(_SMBFSZ *
sizeof (Uchar))) != NULL) {
iop->_flag |= _IOMYBUF;
size = _SMBFSZ - PUSHBACK;
}
} else { /* regular buffered I/O, standard buffer size */
if (fno != -1 && isatty(fno))
iop->_flag |= _IOLBF;
}
if (buf == NULL) {
FUNLOCKFILE(lk);
return; /* malloc() failed */
}
temp = buf + PUSHBACK;
iop->_base = temp;
_setbufend(iop, temp + size);
iop->_ptr = temp;
iop->_cnt = 0;
FUNLOCKFILE(lk);
}
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