2N/A/*
2N/A * CDDL HEADER START
2N/A *
2N/A * The contents of this file are subject to the terms of the
2N/A * Common Development and Distribution License (the "License").
2N/A * You may not use this file except in compliance with the License.
2N/A *
2N/A * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
2N/A * or http://www.opensolaris.org/os/licensing.
2N/A * See the License for the specific language governing permissions
2N/A * and limitations under the License.
2N/A *
2N/A * When distributing Covered Code, include this CDDL HEADER in each
2N/A * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
2N/A * If applicable, add the following below this CDDL HEADER, with the
2N/A * fields enclosed by brackets "[]" replaced with your own identifying
2N/A * information: Portions Copyright [yyyy] [name of copyright owner]
2N/A *
2N/A * CDDL HEADER END
2N/A */
2N/A
2N/A/*
2N/A * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
2N/A * Use is subject to license terms.
2N/A */
2N/A
2N/A/* Copyright (c) 1988 AT&T */
2N/A/* All Rights Reserved */
2N/A
2N/A#pragma ident "%Z%%M% %I% %E% SMI"
2N/A
2N/A#include "lint.h"
2N/A#include "file64.h"
2N/A#include "mtlib.h"
2N/A#include <stdio.h>
2N/A#include <memory.h>
2N/A#include <errno.h>
2N/A#include <thread.h>
2N/A#include <synch.h>
2N/A#include <sys/types.h>
2N/A#include "stdiom.h"
2N/A#include "mse.h"
2N/A
2N/A/* read size-max line from stream, including '\n' */
2N/Achar *
2N/Afgets(char *buf, int size, FILE *iop)
2N/A{
2N/A char *ptr = buf;
2N/A int n;
2N/A Uchar *bufend;
2N/A char *p;
2N/A rmutex_t *lk;
2N/A
2N/A FLOCKFILE(lk, iop);
2N/A
2N/A _SET_ORIENTATION_BYTE(iop);
2N/A
2N/A if (!(iop->_flag & (_IOREAD | _IORW))) {
2N/A errno = EBADF;
2N/A FUNLOCKFILE(lk);
2N/A return (NULL);
2N/A }
2N/A
2N/A if (iop->_base == NULL) {
2N/A if ((bufend = _findbuf(iop)) == NULL) {
2N/A FUNLOCKFILE(lk);
2N/A return (NULL);
2N/A }
2N/A }
2N/A else
2N/A bufend = _bufend(iop);
2N/A
2N/A size--; /* room for '\0' */
2N/A while (size > 0) {
2N/A /* empty buffer */
2N/A if (iop->_cnt <= 0) {
2N/A if (__filbuf(iop) != EOF) {
2N/A iop->_ptr--; /* put back the character */
2N/A iop->_cnt++;
2N/A } else if (ptr == buf) { /* never read anything */
2N/A FUNLOCKFILE(lk);
2N/A return (NULL);
2N/A } else
2N/A break; /* nothing left to read */
2N/A }
2N/A n = (int)(size < iop->_cnt ? size : iop->_cnt);
2N/A if ((p = memccpy(ptr, (char *)iop->_ptr, '\n',
2N/A (size_t)n)) != NULL)
2N/A n = (int)(p - ptr);
2N/A ptr += n;
2N/A iop->_cnt -= n;
2N/A iop->_ptr += n;
2N/A if (_needsync(iop, bufend))
2N/A _bufsync(iop, bufend);
2N/A if (p != NULL)
2N/A break; /* newline found */
2N/A size -= n;
2N/A }
2N/A FUNLOCKFILE(lk);
2N/A *ptr = '\0';
2N/A return (buf);
2N/A}