11573Srgrimes/*-
21573Srgrimes * Copyright (c) 1990, 1993
31573Srgrimes *	The Regents of the University of California.  All rights reserved.
41573Srgrimes *
51573Srgrimes * This code is derived from software contributed to Berkeley by
61573Srgrimes * Chris Torek.
71573Srgrimes *
81573Srgrimes * Redistribution and use in source and binary forms, with or without
91573Srgrimes * modification, are permitted provided that the following conditions
101573Srgrimes * are met:
111573Srgrimes * 1. Redistributions of source code must retain the above copyright
121573Srgrimes *    notice, this list of conditions and the following disclaimer.
131573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright
141573Srgrimes *    notice, this list of conditions and the following disclaimer in the
151573Srgrimes *    documentation and/or other materials provided with the distribution.
16249808Semaste * 3. Neither the name of the University nor the names of its contributors
171573Srgrimes *    may be used to endorse or promote products derived from this software
181573Srgrimes *    without specific prior written permission.
191573Srgrimes *
201573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
211573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
221573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
231573Srgrimes * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
241573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
251573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
261573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
271573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
281573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
291573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
301573Srgrimes * SUCH DAMAGE.
311573Srgrimes */
321573Srgrimes
331573Srgrimes#if defined(LIBC_SCCS) && !defined(lint)
341573Srgrimesstatic char sccsid[] = "@(#)gets.c	8.1 (Berkeley) 6/4/93";
351573Srgrimes#endif /* LIBC_SCCS and not lint */
3692986Sobrien#include <sys/cdefs.h>
3792986Sobrien__FBSDID("$FreeBSD$");
381573Srgrimes
3971579Sdeischen#include "namespace.h"
40110127Stjr#include <unistd.h>
411573Srgrimes#include <stdio.h>
4211185Speter#include <sys/cdefs.h>
4371579Sdeischen#include "un-namespace.h"
44110082Stjr#include "libc_private.h"
45110082Stjr#include "local.h"
461573Srgrimes
4711185Speter__warn_references(gets, "warning: this program uses gets(), which is unsafe.");
4811185Speter
491573Srgrimeschar *
50249810Semastegets(char *buf)
511573Srgrimes{
5292889Sobrien	int c;
5392889Sobrien	char *s;
54110127Stjr	static int warned;
55269007Spfg	static const char w[] =
56110127Stjr	    "warning: this program uses gets(), which is unsafe.\n";
571573Srgrimes
58110082Stjr	FLOCKFILE(stdin);
59110082Stjr	ORIENT(stdin, -1);
60110127Stjr	if (!warned) {
61110127Stjr		(void) _write(STDERR_FILENO, w, sizeof(w) - 1);
62110127Stjr		warned = 1;
63110127Stjr	}
64110082Stjr	for (s = buf; (c = __sgetc(stdin)) != '\n';)
651573Srgrimes		if (c == EOF)
66110082Stjr			if (s == buf) {
67110082Stjr				FUNLOCKFILE(stdin);
681573Srgrimes				return (NULL);
69110082Stjr			} else
701573Srgrimes				break;
711573Srgrimes		else
721573Srgrimes			*s++ = c;
731573Srgrimes	*s = 0;
74110082Stjr	FUNLOCKFILE(stdin);
751573Srgrimes	return (buf);
761573Srgrimes}
77