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