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      1 /*	$OpenBSD: sprintf.c,v 1.13 2005/10/10 12:00:52 espie Exp $ */
      2 /*-
      3  * Copyright (c) 1990, 1993
      4  *	The Regents of the University of California.  All rights reserved.
      5  *
      6  * This code is derived from software contributed to Berkeley by
      7  * Chris Torek.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #undef _FORTIFY_SOURCE
     35 #include <stdio.h>
     36 #include <string.h>
     37 #include <stdarg.h>
     38 #include <limits.h>
     39 #include "local.h"
     40 
     41 #if defined(APIWARN)
     42 __warn_references(sprintf,
     43     "warning: sprintf() is often misused, please use snprintf()");
     44 #endif
     45 
     46 int
     47 sprintf(char *str, const char *fmt, ...)
     48 {
     49 	int ret;
     50 	va_list ap;
     51 	FILE f;
     52 	struct __sfileext fext;
     53 
     54 	_FILEEXT_SETUP(&f, &fext);
     55 	f._file = -1;
     56 	f._flags = __SWR | __SSTR;
     57 	f._bf._base = f._p = (unsigned char *)str;
     58 	f._bf._size = f._w = INT_MAX;
     59 	va_start(ap, fmt);
     60 	ret = __vfprintf(&f, fmt, ap);
     61 	va_end(ap);
     62 	*f._p = '\0';
     63 	return (ret);
     64 }
     65