1 files changed, 46 insertions, 0 deletions
diff --git a/libc/string/strlcat.c b/libc/string/strlcat.c
new file mode 100644
index 000000000..117b8e552
--- /dev/null
+++ b/libc/string/strlcat.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2002     Manuel Novoa III
+ * Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* OpenBSD function:
+ * Append at most n-1-strlen(dst) chars from src to dst and nul-terminate dst.
+ * Returns strlen(src) + strlen({original} dst), so truncation occurred if the
+ * return val is >= n.
+ * Note: If dst doesn't contain a nul in the first n chars, strlen(dst) is
+ *       taken as n. */
+
+#include "_string.h"
+
+size_t strlcat(register char *__restrict dst,
+			   register const char *__restrict src,
+			   size_t n)
+{
+	size_t len;
+	char dummy[1];
+
+	len = 0;
+
+	while (1) {
+		if (len >= n) {
+			dst = dummy;
+			break;
+		}
+		if (!*dst) {
+			break;
+		}
+		++dst;
+		++len;
+	}
+
+	while ((*dst = *src) != 0) {
+		if (++len < n) {
+			++dst;
+		}
+		++src;
+	}
+
+	return len;
+}