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-rw-r--r--lib/libspl/strlcat.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/lib/libspl/strlcat.c b/lib/libspl/strlcat.c
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+/*
+ * 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.
+ */
+#ifndef HAVE_STRLCAT
+
+#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);
+}
+
+#endif