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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#include "synonyms.h"
#include "file64.h"
#include "mtlib.h"
#include <stdio.h>
#include <memory.h>
#include <errno.h>
#include <thread.h>
#include <synch.h>
#include <sys/types.h>
#include "stdiom.h"
#include "mse.h"
/* read size-max line from stream, including '\n' */
char *
fgets(char *buf, int size, FILE *iop)
{
char *ptr = buf;
int n;
Uchar *bufend;
char *p;
rmutex_t *lk;
FLOCKFILE(lk, iop);
_SET_ORIENTATION_BYTE(iop);
if (!(iop->_flag & (_IOREAD | _IORW))) {
errno = EBADF;
FUNLOCKFILE(lk);
return (NULL);
}
if (iop->_base == NULL) {
if ((bufend = _findbuf(iop)) == NULL) {
FUNLOCKFILE(lk);
return (NULL);
}
}
else
bufend = _bufend(iop);
size--; /* room for '\0' */
while (size > 0) {
/* empty buffer */
if (iop->_cnt <= 0) {
if (__filbuf(iop) != EOF) {
iop->_ptr--; /* put back the character */
iop->_cnt++;
} else if (ptr == buf) { /* never read anything */
FUNLOCKFILE(lk);
return (NULL);
} else
break; /* nothing left to read */
}
n = (int)(size < iop->_cnt ? size : iop->_cnt);
if ((p = memccpy(ptr, (char *)iop->_ptr, '\n',
(size_t)n)) != NULL)
n = (int)(p - ptr);
ptr += n;
iop->_cnt -= n;
iop->_ptr += n;
if (_needsync(iop, bufend))
_bufsync(iop, bufend);
if (p != NULL)
break; /* newline found */
size -= n;
}
FUNLOCKFILE(lk);
*ptr = '\0';
return (buf);
}
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