11.18Schristos/* $NetBSD: gets.c,v 1.18 2013/10/04 20:49:16 christos Exp $ */ 21.7Sjtc 31.1Scgd/*- 41.7Sjtc * Copyright (c) 1990, 1993 51.7Sjtc * The Regents of the University of California. All rights reserved. 61.1Scgd * 71.1Scgd * This code is derived from software contributed to Berkeley by 81.1Scgd * Chris Torek. 91.1Scgd * 101.1Scgd * Redistribution and use in source and binary forms, with or without 111.1Scgd * modification, are permitted provided that the following conditions 121.1Scgd * are met: 131.1Scgd * 1. Redistributions of source code must retain the above copyright 141.1Scgd * notice, this list of conditions and the following disclaimer. 151.1Scgd * 2. Redistributions in binary form must reproduce the above copyright 161.1Scgd * notice, this list of conditions and the following disclaimer in the 171.1Scgd * documentation and/or other materials provided with the distribution. 181.15Sagc * 3. Neither the name of the University nor the names of its contributors 191.1Scgd * may be used to endorse or promote products derived from this software 201.1Scgd * without specific prior written permission. 211.1Scgd * 221.1Scgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 231.1Scgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 241.1Scgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 251.1Scgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 261.1Scgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 271.1Scgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 281.1Scgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 291.1Scgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 301.1Scgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 311.1Scgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 321.1Scgd * SUCH DAMAGE. 331.1Scgd */ 341.1Scgd 351.8Schristos#include <sys/cdefs.h> 361.1Scgd#if defined(LIBC_SCCS) && !defined(lint) 371.7Sjtc#if 0 381.7Sjtcstatic char sccsid[] = "@(#)gets.c 8.1 (Berkeley) 6/4/93"; 391.8Schristos#else 401.18Schristos__RCSID("$NetBSD: gets.c,v 1.18 2013/10/04 20:49:16 christos Exp $"); 411.7Sjtc#endif 421.1Scgd#endif /* LIBC_SCCS and not lint */ 431.1Scgd 441.12Slukem#include <assert.h> 451.12Slukem#include <errno.h> 461.1Scgd#include <stdio.h> 471.11Skleink#include "reentrant.h" 481.14Snathanw#include "local.h" 491.16Schristos#ifdef _FORTIFY_SOURCE 501.16Schristos#undef gets 511.16Schristos#endif 521.6Sjtc 531.9Sthorpej__warn_references(gets, "warning: this program uses gets(), which is unsafe.") 541.1Scgd 551.1Scgdchar * 561.18Schristos__gets(char *buf) 571.1Scgd{ 581.10Sperry int c; 591.10Sperry char *s; 601.12Slukem 611.12Slukem _DIAGASSERT(buf != NULL); 621.4Smycroft 631.11Skleink FLOCKFILE(stdin); 641.11Skleink for (s = buf; (c = getchar_unlocked()) != '\n'; ) { 651.11Skleink if (c == EOF) { 661.11Skleink if (s == buf) { 671.11Skleink FUNLOCKFILE(stdin); 681.17Schristos return NULL; 691.11Skleink } else { 701.1Scgd break; 711.11Skleink } 721.11Skleink } else { 731.1Scgd *s++ = c; 741.11Skleink } 751.11Skleink } 761.1Scgd *s = 0; 771.11Skleink FUNLOCKFILE(stdin); 781.17Schristos return buf; 791.1Scgd} 801.18Schristos 811.18Schristoschar * 821.18Schristosgets(char *buf) { 831.18Schristos return __gets(buf); 841.18Schristos} 85