fix confstr return value

per the specification, the terminating null byte is counted.

(cherry picked from commit 0a8d98285f46f721dabf38485df916c02d6a4675)

diff --git a/src/conf/confstr.c b/src/conf/confstr.c
index 4332f7262beac7b64b80c9986a355bbe9f9e5c98..6e9c23a0812284088fa4bf54d3036d69b006a0a0 100644 (file)
--- a/src/conf/confstr.c
+++ b/src/conf/confstr.c
@@ -13,5 +13,5 @@ size_t confstr(int name, char *buf, size_t len)
        }
        // snprintf is overkill but avoid wasting code size to implement
        // this completely useless function and its truncation semantics
-       return snprintf(buf, len, "%s", s);
+       return snprintf(buf, len, "%s", s) + 1;
 }