1*ca2d95d1Schristos /* $NetBSD: gets.c,v 1.18 2013/10/04 20:49:16 christos Exp $ */
2255db7b2Sjtc
361f28255Scgd /*-
4255db7b2Sjtc * Copyright (c) 1990, 1993
5255db7b2Sjtc * The Regents of the University of California. All rights reserved.
661f28255Scgd *
761f28255Scgd * This code is derived from software contributed to Berkeley by
861f28255Scgd * Chris Torek.
961f28255Scgd *
1061f28255Scgd * Redistribution and use in source and binary forms, with or without
1161f28255Scgd * modification, are permitted provided that the following conditions
1261f28255Scgd * are met:
1361f28255Scgd * 1. Redistributions of source code must retain the above copyright
1461f28255Scgd * notice, this list of conditions and the following disclaimer.
1561f28255Scgd * 2. Redistributions in binary form must reproduce the above copyright
1661f28255Scgd * notice, this list of conditions and the following disclaimer in the
1761f28255Scgd * documentation and/or other materials provided with the distribution.
18eb7c1594Sagc * 3. Neither the name of the University nor the names of its contributors
1961f28255Scgd * may be used to endorse or promote products derived from this software
2061f28255Scgd * without specific prior written permission.
2161f28255Scgd *
2261f28255Scgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2361f28255Scgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2461f28255Scgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2561f28255Scgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2661f28255Scgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2761f28255Scgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2861f28255Scgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2961f28255Scgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
3061f28255Scgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
3161f28255Scgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3261f28255Scgd * SUCH DAMAGE.
3361f28255Scgd */
3461f28255Scgd
3523312f88Schristos #include <sys/cdefs.h>
3661f28255Scgd #if defined(LIBC_SCCS) && !defined(lint)
37255db7b2Sjtc #if 0
38255db7b2Sjtc static char sccsid[] = "@(#)gets.c 8.1 (Berkeley) 6/4/93";
3923312f88Schristos #else
40*ca2d95d1Schristos __RCSID("$NetBSD: gets.c,v 1.18 2013/10/04 20:49:16 christos Exp $");
41255db7b2Sjtc #endif
4261f28255Scgd #endif /* LIBC_SCCS and not lint */
4361f28255Scgd
44b48252f3Slukem #include <assert.h>
45b48252f3Slukem #include <errno.h>
4661f28255Scgd #include <stdio.h>
478e8595b0Skleink #include "reentrant.h"
48a74e50ddSnathanw #include "local.h"
4914183450Schristos #ifdef _FORTIFY_SOURCE
5014183450Schristos #undef gets
5114183450Schristos #endif
52c7527f8bSjtc
532a43f220Sthorpej __warn_references(gets, "warning: this program uses gets(), which is unsafe.")
5461f28255Scgd
5561f28255Scgd char *
__gets(char * buf)56*ca2d95d1Schristos __gets(char *buf)
5761f28255Scgd {
58c8bafd62Sperry int c;
59c8bafd62Sperry char *s;
60409eebd1Smycroft
61b48252f3Slukem _DIAGASSERT(buf != NULL);
62b48252f3Slukem
638e8595b0Skleink FLOCKFILE(stdin);
648e8595b0Skleink for (s = buf; (c = getchar_unlocked()) != '\n'; ) {
658e8595b0Skleink if (c == EOF) {
668e8595b0Skleink if (s == buf) {
678e8595b0Skleink FUNLOCKFILE(stdin);
68526d9427Schristos return NULL;
698e8595b0Skleink } else {
7061f28255Scgd break;
718e8595b0Skleink }
728e8595b0Skleink } else {
7361f28255Scgd *s++ = c;
748e8595b0Skleink }
758e8595b0Skleink }
7661f28255Scgd *s = 0;
778e8595b0Skleink FUNLOCKFILE(stdin);
78526d9427Schristos return buf;
7961f28255Scgd }
80*ca2d95d1Schristos
81*ca2d95d1Schristos char *
gets(char * buf)82*ca2d95d1Schristos gets(char *buf) {
83*ca2d95d1Schristos return __gets(buf);
84*ca2d95d1Schristos }
85