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       1                 :            : /*      $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $    */
       2                 :            : 
       3                 :            : /*
       4                 :            :  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
       5                 :            :  *
       6                 :            :  * Permission to use, copy, modify, and distribute this software for any
       7                 :            :  * purpose with or without fee is hereby granted, provided that the above
       8                 :            :  * copyright notice and this permission notice appear in all copies.
       9                 :            :  *
      10                 :            :  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
      11                 :            :  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
      12                 :            :  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
      13                 :            :  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
      14                 :            :  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
      15                 :            :  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
      16                 :            :  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
      17                 :            :  */
      18                 :            : 
      19                 :            : /* OPENBSD ORIGINAL: lib/libc/string/strlcpy.c */
      20                 :            : 
      21                 :            : #include "includes.h"
      22                 :            : #ifndef HAVE_STRLCPY
      23                 :            : 
      24                 :            : #include <sys/types.h>
      25                 :            : #include <string.h>
      26                 :            : 
      27                 :            : /*
      28                 :            :  * Copy src to string dst of size siz.  At most siz-1 characters
      29                 :            :  * will be copied.  Always NUL terminates (unless siz == 0).
      30                 :            :  * Returns strlen(src); if retval >= siz, truncation occurred.
      31                 :            :  */
      32                 :            : size_t
      33                 :     230666 : strlcpy(char *dst, const char *src, size_t siz)
      34                 :            : {
      35                 :     230666 :         char *d = dst;
      36                 :     230666 :         const char *s = src;
      37                 :     230666 :         size_t n = siz;
      38                 :            : 
      39                 :            :         /* Copy as many bytes as will fit */
      40         [ +  - ]:     230666 :         if (n != 0) {
      41         [ +  + ]:   15638034 :                 while (--n != 0) {
      42         [ +  + ]:   15659380 :                         if ((*d++ = *s++) == '\0')
      43                 :            :                                 break;
      44                 :            :                 }
      45                 :            :         }
      46                 :            : 
      47                 :            :         /* Not enough room in dst, add NUL and traverse rest of src */
      48         [ +  + ]:     230666 :         if (n == 0) {
      49         [ +  - ]:     209320 :                 if (siz != 0)
      50                 :     209320 :                         *d = '\0';              /* NUL-terminate dst */
      51         [ -  + ]:     209320 :                 while (*s++)
      52                 :            :                         ;
      53                 :            :         }
      54                 :            : 
      55                 :     230666 :         return(s - src - 1);    /* count does not include NUL */
      56                 :            : }
      57                 :            : 
      58                 :            : #endif /* !HAVE_STRLCPY */