1 #ifdef HAVE_STRLCPY 2 3 int dummy; 4 5 #else 6 7 /* $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $ */ 8 9 /* 10 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> 11 * 12 * Permission to use, copy, modify, and distribute this software for any 13 * purpose with or without fee is hereby granted, provided that the above 14 * copyright notice and this permission notice appear in all copies. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 17 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 19 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 20 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 21 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 22 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 23 */ 24 25 #include <sys/types.h> 26 #include <string.h> 27 28 /* 29 * Copy src to string dst of size siz. At most siz-1 characters 30 * will be copied. Always NUL terminates (unless siz == 0). 31 * Returns strlen(src); if retval >= siz, truncation occurred. 32 */ 33 size_t 34 strlcpy(char *dst, const char *src, size_t siz) 35 { 36 char *d = dst; 37 const char *s = src; 38 size_t n = siz; 39 40 /* Copy as many bytes as will fit */ 41 if (n != 0) { 42 while (--n != 0) { 43 if ((*d++ = *s++) == '\0') 44 break; 45 } 46 } 47 48 /* Not enough room in dst, add NUL and traverse rest of src */ 49 if (n == 0) { 50 if (siz != 0) 51 *d = '\0'; /* NUL-terminate dst */ 52 while (*s++) 53 ; 54 } 55 56 return(s - src - 1); /* count does not include NUL */ 57 } 58 59 #endif 60