lib/string/README: Document stprintf(,0,)

Signed-off-by: Alejandro Colomar <alx@kernel.org>

diff --git a/lib/string/README b/lib/string/README
index 02b4bdc00c7c58eb334825f62b86cfa048f4a8dd..d36388f6941fd603ff7d7d45dd57333dd9f0d19e 100644 (file)
--- a/lib/string/README
+++ b/lib/string/README
@@ -217,6 +217,8 @@ sprintf/ - Formatted string creation
        snprintf(3) wrapper that reports truncation with -1.
        If you need more than one call to form a string,
        use seprintf() instead.
+       If the size is 0, the behavior is undefined; currently, we
+       abort(3).
     stprintf_a()
        Like stprintf(), but takes an array.