1 files changed, 9 insertions, 0 deletions
diff --git a/userland/libc/string/strnlen.c b/userland/libc/string/strnlen.c
new file mode 100644
index 0000000..86df42e
--- /dev/null
+++ b/userland/libc/string/strnlen.c
@@ -0,0 +1,9 @@
+#include <string.h>
+
+size_t strnlen(const char *s, size_t maxlen) {
+  size_t i;
+  for (i = 0; i < maxlen; i++)
+    if (s[i] == 0)
+      break;
+  return i;
+}