[NaCl SDK] nacl_io: Add initial support for getsockopt

native_client_sdk/src/tests/nacl_io_test/socket_test.cc

Index: native_client_sdk/src/tests/nacl_io_test/socket_test.cc
diff --git a/native_client_sdk/src/tests/nacl_io_test/socket_test.cc b/native_client_sdk/src/tests/nacl_io_test/socket_test.cc
index 90c59dd99c80ea7c94db1577a4d365fb18a3b854..808a7ed99d78af13fcaec9f163662c7c50d1e624 100644
--- a/native_client_sdk/src/tests/nacl_io_test/socket_test.cc
+++ b/native_client_sdk/src/tests/nacl_io_test/socket_test.cc
@@ -221,11 +221,16 @@ TEST_F(SocketTest, Setsockopt) {
   socklen_t len = 10;
   char optval[len];
 
-  EXPECT_LT(ki_setsockopt(123, SOL_SOCKET, SO_ACCEPTCONN, NULL, len), 0);
+  // Passing a bad address as optval should generate EFAULT
+  EXPECT_EQ(-1, ki_setsockopt(123, SOL_SOCKET, SO_ACCEPTCONN, NULL, len));
   EXPECT_EQ(errno, EFAULT);
-  EXPECT_LT(ki_setsockopt(-1, SOL_SOCKET, SO_ACCEPTCONN, optval, len), 0);
+
+  // Passing a bad socket descriptor should generate EBADF
+  EXPECT_EQ(-1, ki_setsockopt(-1, SOL_SOCKET, SO_ACCEPTCONN, optval, len));
   EXPECT_EQ(errno, EBADF);
-  EXPECT_LT(ki_setsockopt(0, SOL_SOCKET, SO_ACCEPTCONN, optval, len), 0);
+
+  // Passing an FD that is valid but not a socket should generate ENOTSOCK
+  EXPECT_EQ(-1, ki_setsockopt(0, SOL_SOCKET, SO_ACCEPTCONN, optval, len));
   EXPECT_EQ(errno, ENOTSOCK);
 }