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Annotation of src/lib/libc/ssp/vsprintf_chk.c, Revision 1.4

1.4     ! kristerw    1: /*     $NetBSD: vsprintf_chk.c,v 1.3 2007/06/03 17:34:37 christos 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:  * 3. All advertising materials mentioning features or use of this software
                     19:  *    must display the following acknowledgement:
                     20:  *        This product includes software developed by the NetBSD
                     21:  *        Foundation, Inc. and its contributors.
                     22:  * 4. Neither the name of The NetBSD Foundation nor the names of its
                     23:  *    contributors may be used to endorse or promote products derived
                     24:  *    from this software without specific prior written permission.
                     25:  *
                     26:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
                     27:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     28:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     29:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
                     30:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     31:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     32:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     33:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     34:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     35:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     36:  * POSSIBILITY OF SUCH DAMAGE.
                     37:  */
                     38: #include <sys/cdefs.h>
1.4     ! kristerw   39: __RCSID("$NetBSD: vsprintf_chk.c,v 1.3 2007/06/03 17:34:37 christos Exp $");
1.1       tls        40:
                     41: /*LINTLIBRARY*/
                     42:
1.2       tls        43: #include <ssp/ssp.h>
1.1       tls        44: #include <stdio.h>
                     45: #include <limits.h>
                     46: #include <stdarg.h>
1.4     ! kristerw   47: #include <ssp/stdio.h>
1.1       tls        48:
1.3       christos   49: #undef vsprintf
                     50: #undef vsnprintf
                     51:
1.1       tls        52: /*ARGSUSED*/
                     53: int
                     54: __vsprintf_chk(char * __restrict buf, int flags, size_t slen,
                     55:     const char * __restrict fmt, va_list ap)
                     56: {
                     57:        int rv;
                     58:
                     59:        if (slen > (size_t)INT_MAX)
                     60:                rv = vsprintf(buf, fmt, ap);
                     61:        else {
                     62:                if ((rv = vsnprintf(buf, slen, fmt, ap)) >= 0 && rv >= slen)
                     63:                        __chk_fail();
                     64:        }
                     65:
                     66:        return rv;
                     67: }

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