From 5f3e19dbbeb851fff5cf7f9869d344feca479413 Mon Sep 17 00:00:00 2001
From: Dan Albert <danalbert@google.com>
Date: Tue, 19 May 2015 18:17:31 -0700
Subject: Fix error handling for negative size in ftruncate.

Bug: 21309901
Change-Id: I54692ab8105dd09db6af7a2c0894a17bdd118aa0
(cherry picked from commit c05554ec5c9aff5e0f1e83de9bb62c3569eecca2)
---
 tests/unistd_test.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'tests')

diff --git a/tests/unistd_test.cpp b/tests/unistd_test.cpp
index f54a461..a21578a 100644
--- a/tests/unistd_test.cpp
+++ b/tests/unistd_test.cpp
@@ -176,6 +176,15 @@ TEST(unistd, ftruncate64) {
   ASSERT_EQ(123, sb.st_size);
 }
 
+TEST(unistd, ftruncate_negative) {
+  TemporaryFile tf;
+  errno = 0;
+  int rc = ftruncate(tf.fd, -123);
+  int err = errno;
+  ASSERT_EQ(-1, rc);
+  ASSERT_EQ(EINVAL, err);
+}
+
 static bool g_pause_test_flag = false;
 static void PauseTestSignalHandler(int) {
   g_pause_test_flag = true;
-- 
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