lib/libspl/strlcpy.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #include <string.h>
  28 #include <sys/types.h>
  29
  30 /*
  31  * Copies src to the dstsize buffer at dst. The copy will never
  32  * overflow the destination buffer and the buffer will always be null
  33  * terminated.
  34  */
  35
  36 size_t
  37 strlcpy(char *dst, const char *src, size_t len)
  38 {
  39         size_t slen = strlen(src);
  40         size_t copied;
  41
  42         if (len == 0)
  43                 return (slen);
  44
  45         if (slen >= len)
  46                 copied = len - 1;
  47         else
  48                 copied = slen;
  49         (void) memcpy(dst, src, copied);
  50         dst[copied] = '\0';
  51         return (slen);
  52 }