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Member "file-5.35/src/strlcpy.c" (20 Jun 2012, 1641 Bytes) of package /linux/misc/file-5.35.tar.gz:


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    1 /*  $OpenBSD: strlcpy.c,v 1.10 2005/08/08 08:05:37 espie 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 #include "file.h"
   21 
   22 #include <sys/types.h>
   23 #include <string.h>
   24 
   25 /*
   26  * Copy src to string dst of size siz.  At most siz-1 characters
   27  * will be copied.  Always NUL terminates (unless siz == 0).
   28  * Returns strlen(src); if retval >= siz, truncation occurred.
   29  */
   30 size_t
   31 strlcpy(char *dst, const char *src, size_t siz)
   32 {
   33     char *d = dst;
   34     const char *s = src;
   35     size_t n = siz;
   36 
   37     /* Copy as many bytes as will fit */
   38     if (n != 0 && --n != 0) {
   39         do {
   40             if ((*d++ = *s++) == 0)
   41                 break;
   42         } while (--n != 0);
   43     }
   44 
   45     /* Not enough room in dst, add NUL and traverse rest of src */
   46     if (n == 0) {
   47         if (siz != 0)
   48             *d = '\0';      /* NUL-terminate dst */
   49         while (*s++)
   50             ;
   51     }
   52 
   53     return(s - src - 1);    /* count does not include NUL */
   54 }