1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include "synonyms.h" 30 #include <string.h> 31 #include <sys/types.h> 32 33 /* 34 * Appends src to the dstsize buffer at dst. The append will never 35 * overflow the destination buffer and the buffer will always be null 36 * terminated. Never reference beyond &dst[dstsize-1] when computing 37 * the length of the pre-existing string. 38 */ 39 40 size_t 41 strlcat(char *dst, const char *src, size_t dstsize) 42 { 43 char *df = dst; 44 size_t left = dstsize; 45 size_t l1; 46 size_t l2 = strlen(src); 47 size_t copied; 48 49 while (left-- != 0 && *df != '\0') 50 df++; 51 l1 = df - dst; 52 if (dstsize == l1) 53 return (l1 + l2); 54 55 copied = l1 + l2 >= dstsize ? dstsize - l1 - 1 : l2; 56 (void) memcpy(dst + l1, src, copied); 57 dst[l1+copied] = '\0'; 58 return (l1 + l2); 59 } 60