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Annotation of embedaddon/sudo/compat/strlcpy.c, revision 1.1.1.1

1.1       misho       1: /*     $OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $     */
                      2: 
                      3: /*
                      4:  * Copyright (c) 1998, 2003-2005, 2010-2011
                      5:  *     Todd C. Miller <Todd.Miller@courtesan.com>
                      6:  *
                      7:  * Permission to use, copy, modify, and distribute this software for any
                      8:  * purpose with or without fee is hereby granted, provided that the above
                      9:  * copyright notice and this permission notice appear in all copies.
                     10:  *
                     11:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     12:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     13:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     14:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     15:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     16:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     17:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     18:  */
                     19: 
                     20: #include <config.h>
                     21: 
                     22: #include <sys/types.h>
                     23: 
                     24: #include "missing.h"
                     25: 
                     26: /*
                     27:  * Copy src to string dst of size siz.  At most siz-1 characters
                     28:  * will be copied.  Always NUL terminates (unless siz == 0).
                     29:  * Returns strlen(src); if retval >= siz, truncation occurred.
                     30:  */
                     31: size_t
                     32: strlcpy(char *dst, const char *src, size_t siz)
                     33: {
                     34:        char *d = dst;
                     35:        const char *s = src;
                     36:        size_t n = siz;
                     37: 
                     38:        /* Copy as many bytes as will fit */
                     39:        if (n != 0 && --n != 0) {
                     40:                do {
                     41:                        if ((*d++ = *s++) == 0)
                     42:                                break;
                     43:                } while (--n != 0);
                     44:        }
                     45: 
                     46:        /* Not enough room in dst, add NUL and traverse rest of src */
                     47:        if (n == 0) {
                     48:                if (siz != 0)
                     49:                        *d = '\0';              /* NUL-terminate dst */
                     50:                while (*s++)
                     51:                        ;
                     52:        }
                     53: 
                     54:        return s - src - 1;     /* count does not include NUL */
                     55: }