catch off-by-one errors in stpncpy(); ok guenther@

1 files changed, 24 insertions, 0 deletions

diff --git a/src/regress/lib/libc/stpncpy/stpncpy_test.c b/src/regress/lib/libc/stpncpy/stpncpy_test.c
new file mode 100644
index 0000000000..63b7d25e53
--- /dev/null
+++ b/src/regress/lib/libc/stpncpy/stpncpy_test.c
@@ -0,0 +1,24 @@
+/* $OpenBSD: stpncpy_test.c,v 1.1 2012/07/11 10:46:23 naddy Exp $ */
+
+/*
+ * Public domain, 2012, Christian Weisgerber <naddy@openbsd.org>
+ */
+
+#include <string.h>
+
+int main(void)
+{
+        char dst[8];
+        char *src = "abcdef";
+
+        if (stpncpy(dst, src, 5) != dst + 5)
+                return 1;
+        if (stpncpy(dst, src, 6) != dst + 6)
+                return 1;
+        if (stpncpy(dst, src, 7) != dst + 6)
+                return 1;
+        if (stpncpy(dst, src, 8) != dst + 6)
+                return 1;
+        
+        return 0;
+}