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Annotation of src/lib/libc/ssp/vsprintf_chk.c, Revision 1.5

1.5     ! martin      1: /*     $NetBSD: vsprintf_chk.c,v 1.4 2007/08/04 19:37:52 kristerw Exp $        */
1.1       tls         2:
                      3: /*-
                      4:  * Copyright (c) 2006 The NetBSD Foundation, Inc.
                      5:  * All rights reserved.
                      6:  *
                      7:  * This code is derived from software contributed to The NetBSD Foundation
                      8:  * by Christos Zoulas.
                      9:  *
                     10:  * Redistribution and use in source and binary forms, with or without
                     11:  * modification, are permitted provided that the following conditions
                     12:  * are met:
                     13:  * 1. Redistributions of source code must retain the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer.
                     15:  * 2. Redistributions in binary form must reproduce the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer in the
                     17:  *    documentation and/or other materials provided with the distribution.
                     18:  *
                     19:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
                     20:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     21:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     22:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
                     23:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     24:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     25:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     26:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     27:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     28:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     29:  * POSSIBILITY OF SUCH DAMAGE.
                     30:  */
                     31: #include <sys/cdefs.h>
1.5     ! martin     32: __RCSID("$NetBSD: vsprintf_chk.c,v 1.4 2007/08/04 19:37:52 kristerw Exp $");
1.1       tls        33:
                     34: /*LINTLIBRARY*/
                     35:
1.2       tls        36: #include <ssp/ssp.h>
1.1       tls        37: #include <stdio.h>
                     38: #include <limits.h>
                     39: #include <stdarg.h>
1.4       kristerw   40: #include <ssp/stdio.h>
1.1       tls        41:
1.3       christos   42: #undef vsprintf
                     43: #undef vsnprintf
                     44:
1.1       tls        45: /*ARGSUSED*/
                     46: int
                     47: __vsprintf_chk(char * __restrict buf, int flags, size_t slen,
                     48:     const char * __restrict fmt, va_list ap)
                     49: {
                     50:        int rv;
                     51:
                     52:        if (slen > (size_t)INT_MAX)
                     53:                rv = vsprintf(buf, fmt, ap);
                     54:        else {
                     55:                if ((rv = vsnprintf(buf, slen, fmt, ap)) >= 0 && rv >= slen)
                     56:                        __chk_fail();
                     57:        }
                     58:
                     59:        return rv;
                     60: }