/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #include <string.h> #include <sys/types.h> /* * Appends src to the dstsize buffer at dst. The append will never * overflow the destination buffer and the buffer will always be null * terminated. Never reference beyond &dst[dstsize-1] when computing * the length of the pre-existing string. */ size_t strlcat(char *dst, const char *src, size_t dstsize) { char *df = dst; size_t left = dstsize; size_t l1; size_t l2 = strlen(src); size_t copied; while (left-- != 0 && *df != '\0') df++; l1 = df - dst; if (dstsize == l1) return (l1 + l2); copied = l1 + l2 >= dstsize ? dstsize - l1 - 1 : l2; (void) memcpy(dst + l1, src, copied); dst[l1+copied] = '\0'; return (l1 + l2); }