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      1 /*	$NetBSD: openpam_vasprintf.c,v 1.4 2023/06/30 21:46:21 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2011-2012 Dag-Erling Smrgrav
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. The name of the author may not be used to endorse or promote
     16  *    products derived from this software without specific prior written
     17  *    permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #ifdef HAVE_CONFIG_H
     33 # include "config.h"
     34 #endif
     35 
     36 #include <sys/cdefs.h>
     37 __RCSID("$NetBSD: openpam_vasprintf.c,v 1.4 2023/06/30 21:46:21 christos Exp $");
     38 
     39 #ifndef HAVE_VASPRINTF
     40 
     41 #include <stdarg.h>
     42 #include <stdio.h>
     43 #include <stdlib.h>
     44 
     45 #include "openpam_vasprintf.h"
     46 
     47 /* like vsprintf(3), but allocates memory for the result. */
     48 int
     49 openpam_vasprintf(char **str, const char *fmt, va_list ap)
     50 {
     51         va_list apcopy;
     52         int len, ret;
     53 
     54         va_copy(apcopy, ap);
     55         len = vsnprintf(NULL, 0, fmt, ap);
     56         if ((*str = malloc(len + 1)) == NULL)
     57                 return (-1);
     58         ret = vsnprintf(*str, len + 1, fmt, apcopy);
     59         va_end(apcopy);
     60         return (ret);
     61 }
     62 
     63 #endif
     64