Return to strlcpy.c CVS log

Up to [local] / sys / lib / libkern

Annotation of sys/lib/libkern/strlcpy.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: strlcpy.c,v 1.5 2004/08/07 00:38:33 deraadt 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: #if defined(LIBC_SCCS) && !defined(lint)
                     20: static char *rcsid = "$OpenBSD: strlcpy.c,v 1.5 2004/08/07 00:38:33 deraadt Exp $";
                     21: #endif /* LIBC_SCCS and not lint */
                     22:
                     23: #if !defined(_KERNEL) && !defined(_STANDALONE)
                     24: #include <sys/types.h>
                     25: #include <string.h>
                     26: #else
                     27: #include <lib/libkern/libkern.h>
                     28: #endif
                     29:
                     30: /*
                     31:  * Copy src to string dst of size siz.  At most siz-1 characters
                     32:  * will be copied.  Always NUL terminates (unless siz == 0).
                     33:  * Returns strlen(src); if retval >= siz, truncation occurred.
                     34:  */
                     35: size_t
                     36: strlcpy(char *dst, const char *src, size_t siz)
                     37: {
                     38:        char *d = dst;
                     39:        const char *s = src;
                     40:        size_t n = siz;
                     41:
                     42:        /* Copy as many bytes as will fit */
                     43:        if (n != 0 && --n != 0) {
                     44:                do {
                     45:                        if ((*d++ = *s++) == 0)
                     46:                                break;
                     47:                } while (--n != 0);
                     48:        }
                     49:
                     50:        /* Not enough room in dst, add NUL and traverse rest of src */
                     51:        if (n == 0) {
                     52:                if (siz != 0)
                     53:                        *d = '\0';              /* NUL-terminate dst */
                     54:                while (*s++)
                     55:                        ;
                     56:        }
                     57:
                     58:        return(s - src - 1);    /* count does not include NUL */
                     59: }