provide strlcat() and strlcpy() for platform without them. although

this is not needed in OpenBSD, we'll keep the code here to stay in sync.
license change for strlcat/strlcpy ok millert@.

3 files changed, 80 insertions, 0 deletions

diff --git a/usr.sbin/bind/lib/isc/include/isc/platform.h.in b/usr.sbin/bind/lib/isc/include/isc/platform.h.in
index 065a35a5531..40e430991f4 100644
--- a/usr.sbin/bind/lib/isc/include/isc/platform.h.in
+++ b/usr.sbin/bind/lib/isc/include/isc/platform.h.in
@@ -102,6 +102,16 @@
 @ISC_PLATFORM_NEEDSTRSEP@
 
 /*
+ * If the system needs strlcpy(), ISC_PLATFORM_NEEDSTRLCPY will be defined.
+ */
+@ISC_PLATFORM_NEEDSTRLCPY@
+
+/*
+ * If the system needs strlcat(), ISC_PLATFORM_NEEDSTRLCAT will be defined.
+ */
+@ISC_PLATFORM_NEEDSTRLCAT@
+
+/*
  * Define either ISC_PLATFORM_BSD44MSGHDR or ISC_PLATFORM_BSD43MSGHDR.
  */
 @ISC_PLATFORM_MSGHDRFLAVOR@
diff --git a/usr.sbin/bind/lib/isc/include/isc/string.h b/usr.sbin/bind/lib/isc/include/isc/string.h
index 9b578fd91f2..bef1a17c6d7 100644
--- a/usr.sbin/bind/lib/isc/include/isc/string.h
+++ b/usr.sbin/bind/lib/isc/include/isc/string.h
@@ -51,6 +51,22 @@ isc_string_separate(char **stringp, const char *delim);
 #define strsep isc_string_separate
 #endif
 
+size_t
+isc_string_strlcpy(char *dst, const char *src, size_t size);
+
+
+#ifdef ISC_PLATFORM_NEEDSTRLCPY
+#define strlcpy isc_string_strlcpy
+#endif
+
+
+size_t
+isc_string_strlcat(char *dst, const char *src, size_t size);
+
+#ifdef ISC_PLATFORM_NEEDSTRLCAT
+#define strlcat isc_string_strlcat
+#endif
+
 ISC_LANG_ENDDECLS
 
 #endif /* ISC_STRING_H */
diff --git a/usr.sbin/bind/lib/isc/string.c b/usr.sbin/bind/lib/isc/string.c
index 5222142e536..50a4680fd15 100644
--- a/usr.sbin/bind/lib/isc/string.c
+++ b/usr.sbin/bind/lib/isc/string.c
@@ -109,3 +109,57 @@ isc_string_separate(char **stringp, const char *delim) {
 	*stringp = NULL;
 	return (string);
 }
+
+size_t
+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 != 0 && --n != 0) {
+		do {
+			if ((*d++ = *s++) == 0)
+				break;
+		} while (--n != 0);
+	}
+
+	/* Not enough room in dst, add NUL and traverse rest of src */
+	if (n == 0) {
+		if (size != 0)
+			*d = '\0';		/* NUL-terminate dst */
+		while (*s++)
+			;
+	}
+
+	return(s - src - 1);	/* count does not include NUL */
+}
+ 
+size_t
+strlcat(char *dst, const char *src, size_t size)
+{
+	char *d = dst;
+	const char *s = src;
+	size_t n = size;
+	size_t dlen;
+
+	/* Find the end of dst and adjust bytes left but don't go past end */
+	while (n-- != 0 && *d != '\0')
+		d++;
+	dlen = d - dst;
+	n = size - dlen;
+
+	if (n == 0)
+		return(dlen + strlen(s));
+	while (*s != '\0') {
+		if (n != 1) {
+			*d++ = *s;
+			n--;
+		}
+		s++;
+	}
+	*d = '\0';
+
+	return(dlen + (s - src));	/* count does not include NUL */
+}