/*
* 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 */
#pragma ident "%Z%%M% %I% %E% SMI"
#include "lint.h"
#include "file64.h"
#include "mtlib.h"
#include <sys/types.h>
#include <stdio.h>
#include <memory.h>
#include <thread.h>
#include <synch.h>
#include <errno.h>
#include "stdiom.h"
#include "mse.h"
/* read a single line from stdin, replace the '\n' with '\0' */
char *
gets(char *buf)
{
char *ptr = buf;
ssize_t n;
char *p;
Uchar *bufend;
rmutex_t *lk;
FLOCKFILE(lk, stdin);
_SET_ORIENTATION_BYTE(stdin);
if (!(stdin->_flag & (_IOREAD | _IORW))) {
errno = EBADF;
FUNLOCKFILE(lk);
return (0);
}
if (stdin->_base == NULL) {
if ((bufend = _findbuf(stdin)) == 0) {
FUNLOCKFILE(lk);
return (0);
}
}
else
bufend = _bufend(stdin);
for (;;) /* until get a '\n' */
{
if (stdin->_cnt <= 0) /* empty buffer */
{
if (__filbuf(stdin) != EOF) {
stdin->_ptr--; /* put back the character */
stdin->_cnt++;
} else if (ptr == buf) { /* never read anything */
FUNLOCKFILE(lk);
return (0);
} else
break; /* nothing left to read */
}
n = stdin->_cnt;
if ((p = (char *)memccpy(ptr, (char *)stdin->_ptr, '\n',
(size_t)n)) != 0)
n = p - ptr;
ptr += n;
stdin->_cnt -= n;
stdin->_ptr += n;
if (_needsync(stdin, bufend))
_bufsync(stdin, bufend);
if (p != 0) /* found a '\n' */
{
ptr--; /* step back over the '\n' */
break;
}
}
*ptr = '\0';
FUNLOCKFILE(lk);
return (buf);
}