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openpam_strlset.c revision 1.2 
      1 /*	$NetBSD: openpam_strlset.c,v 1.2 2014/10/24 18:17:56 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  * Id: openpam_strlset.c 807 2014-09-09 09:41:32Z des
     32  */
     33 
     34 #ifdef HAVE_CONFIG_H
     35 # include "config.h"
     36 #endif
     37 
     38 #include <sys/cdefs.h>
     39 __RCSID("$NetBSD: openpam_strlset.c,v 1.2 2014/10/24 18:17:56 christos Exp $");
     40 
     41 #ifndef HAVE_STRLSET
     42 
     43 #include <stddef.h>
     44 
     45 #include "openpam_strlset.h"
     46 
     47 /*
     48  * like memset(3), but stops at the first NUL byte and NUL-terminates the
     49  * result.  Returns the number of bytes that were written, not including
     50  * the terminating NUL.
     51  */
     52 size_t
     53 openpam_strlset(char *str, int ch, size_t size)
     54 {
     55 	size_t len;
     56 
     57 	for (len = 0; *str && size > 1; ++len, --size)
     58 		*str++ = (char)ch;
     59 	*str = '\0';
     60 	return (++len);
     61 }
     62 
     63 #endif
     64