zfs/lib/libport/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, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27
  28
  29 #include <string.h>
  30 #include <sys/types.h>
  31 #include "zfs_config.h"
  32
  33 /*
  34  * Copies src to the dstsize buffer at dst. The copy will never
  35  * overflow the destination buffer and the buffer will always be null
  36  * terminated.
  37  */
  38
  39 #ifndef HAVE_STRLCPY
  40 size_t
  41 strlcpy(char *dst, const char *src, size_t len)
  42 {
  43         size_t slen = strlen(src);
  44         size_t copied;
  45
  46         if (len == 0)
  47                 return (slen);
  48
  49         if (slen >= len)
  50                 copied = len - 1;
  51         else
  52                 copied = slen;
  53         (void) memcpy(dst, src, copied);
  54         dst[copied] = '\0';
  55         return (slen);
  56 }
  57 #endif