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diff --git a/lib/lwres/compat.c b/lib/lwres/compat.c
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+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (c) 1990, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*! \file */
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)strtoul.c 8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <config.h>
+
+#include <limits.h>
+#include <ctype.h>
+#include <errno.h>
+
+#include <lwres/stdlib.h>
+#include <lwres/string.h>
+
+#define DE_CONST(konst, var) \
+ do { \
+ union { const void *k; void *v; } _u; \
+ _u.k = konst; \
+ var = _u.v; \
+ } while (0)
+
+/*!
+ * Convert a string to an unsigned long integer.
+ *
+ * Ignores `locale' stuff. Assumes that the upper and lower case
+ * alphabets and digits are each contiguous.
+ */
+unsigned long
+lwres_strtoul(const char *nptr, char **endptr, int base) {
+ const char *s = nptr;
+ unsigned long acc;
+ unsigned char c;
+ unsigned long cutoff;
+ int neg = 0, any, cutlim;
+
+ /*
+ * See strtol for comments as to the logic used.
+ */
+ do {
+ c = *s++;
+ } while (isspace(c));
+ if (c == '-') {
+ neg = 1;
+ c = *s++;
+ } else if (c == '+')
+ c = *s++;
+ if ((base == 0 || base == 16) &&
+ c == '0' && (*s == 'x' || *s == 'X')) {
+ c = s[1];
+ s += 2;
+ base = 16;
+ }
+ if (base == 0)
+ base = c == '0' ? 8 : 10;
+ cutoff = (unsigned long)ULONG_MAX / (unsigned long)base;
+ cutlim = (unsigned long)ULONG_MAX % (unsigned long)base;
+ for (acc = 0, any = 0;; c = *s++) {
+ if (!isascii(c))
+ break;
+ if (isdigit(c))
+ c -= '0';
+ else if (isalpha(c))
+ c -= isupper(c) ? 'A' - 10 : 'a' - 10;
+ else
+ break;
+ if (c >= base)
+ break;
+ if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
+ any = -1;
+ else {
+ any = 1;
+ acc *= base;
+ acc += c;
+ }
+ }
+ if (any < 0) {
+ acc = ULONG_MAX;
+ errno = ERANGE;
+ } else if (neg)
+ /* XXX: acc was declared unsigned! */
+ acc = -acc;
+ if (endptr != 0)
+ DE_CONST(any ? s - 1 : nptr, *endptr);
+ return (acc);
+}
+
+size_t
+lwres_strlcpy(char *dst, const char *src, size_t size) {
+ char *d = dst;
+ const char *s = src;
+ size_t n = size;
+
+ /* Copy as many bytes as will fit */
+ if (n != 0U && --n != 0U) {
+ do {
+ if ((*d++ = *s++) == 0)
+ break;
+ } while (--n != 0U);
+ }
+
+ /* Not enough room in dst, add NUL and traverse rest of src */
+ if (n == 0U) {
+ if (size != 0U)
+ *d = '\0'; /* NUL-terminate dst */
+ while (*s++)
+ ;
+ }
+
+ return(s - src - 1); /* count does not include NUL */
+}