From: Szabolcs Nagy <nsz@port70.net>
Date: Sun, 15 Jul 2018 21:20:21 +0000 (+0000)
Subject: add ungetc with setvbuf test
X-Git-Url: http://nsz.repo.hu/git/?p=libc-test;a=commitdiff_plain;h=12e1dfcdbb2de87a28914d7e9a82b5f71b5890d8

add ungetc with setvbuf test
---

diff --git a/src/regression/setvbuf-unget.c b/src/regression/setvbuf-unget.c
new file mode 100644
index 0000000..8667675
--- /dev/null
+++ b/src/regression/setvbuf-unget.c
@@ -0,0 +1,15 @@
+// commit: 9cad27a3dc1a4eb349b6591e4dc8cc89dce32277
+// ungetc after setvbuf should not clobber memory below buffer
+#include <stdio.h>
+#include <string.h>
+#include "test.h"
+
+int main(void)
+{
+	char buf[1024] = "hello world";
+	setvbuf(stdin, buf+12, _IOFBF, sizeof buf - 12);
+	while (ungetc('x', stdin)!=EOF);
+	if (strcmp(buf, "hello world"))
+		t_error("ungetc clobbered outside buffer: [%.12s]\n", buf);
+	return t_status;
+}