17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*7257d1b4Sraf * Common Development and Distribution License (the "License").
6*7257d1b4Sraf * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate *
87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate * and limitations under the License.
127c478bd9Sstevel@tonic-gate *
137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate *
197c478bd9Sstevel@tonic-gate * CDDL HEADER END
207c478bd9Sstevel@tonic-gate */
21*7257d1b4Sraf
227c478bd9Sstevel@tonic-gate /*
23*7257d1b4Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
247c478bd9Sstevel@tonic-gate * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate */
267c478bd9Sstevel@tonic-gate
277c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
287c478bd9Sstevel@tonic-gate
29*7257d1b4Sraf #include "lint.h"
307c478bd9Sstevel@tonic-gate #include <string.h>
317c478bd9Sstevel@tonic-gate #include <sys/types.h>
327c478bd9Sstevel@tonic-gate
337c478bd9Sstevel@tonic-gate /*
347c478bd9Sstevel@tonic-gate * Appends src to the dstsize buffer at dst. The append will never
357c478bd9Sstevel@tonic-gate * overflow the destination buffer and the buffer will always be null
367c478bd9Sstevel@tonic-gate * terminated. Never reference beyond &dst[dstsize-1] when computing
377c478bd9Sstevel@tonic-gate * the length of the pre-existing string.
387c478bd9Sstevel@tonic-gate */
397c478bd9Sstevel@tonic-gate
407c478bd9Sstevel@tonic-gate size_t
strlcat(char * dst,const char * src,size_t dstsize)417c478bd9Sstevel@tonic-gate strlcat(char *dst, const char *src, size_t dstsize)
427c478bd9Sstevel@tonic-gate {
437c478bd9Sstevel@tonic-gate char *df = dst;
447c478bd9Sstevel@tonic-gate size_t left = dstsize;
457c478bd9Sstevel@tonic-gate size_t l1;
467c478bd9Sstevel@tonic-gate size_t l2 = strlen(src);
477c478bd9Sstevel@tonic-gate size_t copied;
487c478bd9Sstevel@tonic-gate
497c478bd9Sstevel@tonic-gate while (left-- != 0 && *df != '\0')
507c478bd9Sstevel@tonic-gate df++;
517c478bd9Sstevel@tonic-gate l1 = df - dst;
527c478bd9Sstevel@tonic-gate if (dstsize == l1)
537c478bd9Sstevel@tonic-gate return (l1 + l2);
547c478bd9Sstevel@tonic-gate
557c478bd9Sstevel@tonic-gate copied = l1 + l2 >= dstsize ? dstsize - l1 - 1 : l2;
567c478bd9Sstevel@tonic-gate (void) memcpy(dst + l1, src, copied);
577c478bd9Sstevel@tonic-gate dst[l1+copied] = '\0';
587c478bd9Sstevel@tonic-gate return (l1 + l2);
597c478bd9Sstevel@tonic-gate }
60