text: /*	$OpenBSD: strlcpy.c,v 1.12 2015/01/15 03:54:12 millert Exp $	*/
  
  /*
   * Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
   *
   * Permission to use, copy, modify, and distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: releng/11.1/lib/libc/string/strlcpy.c 281135 2015-04-06 03:21:22Z pfg $");
  
  #include <sys/types.h>
  #include <string.h>
  
  /*
   * Copy string src to buffer dst of size dsize.  At most dsize-1
   * chars will be copied.  Always NUL terminates (unless dsize == 0).
   * Returns strlen(src); if retval >= dsize, truncation occurred.
   */
  size_t
  strlcpy(char * __restrict dst, const char * __restrict src, size_t dsize)
  {
  	const char *osrc = src;
  	size_t nleft = dsize;
  
  	/* Copy as many bytes as will fit. */
  	if (nleft != 0) {
  		while (--nleft != 0) {
  			if ((*dst++ = *src++) == '\0')
  				break;
  		}
  	}
  
  	/* Not enough room in dst, add NUL and traverse rest of src. */
  	if (nleft == 0) {
  		if (dsize != 0)
  			*dst = '\0';		/* NUL-terminate dst */
  		while (*src++)
  			;
  	}
  
  	return(src - osrc - 1);	/* count does not include NUL */
  }
  