1 files changed, 42 insertions, 0 deletions
diff --git a/src/lib/util/unittests/interprocess_util.cc b/src/lib/util/unittests/interprocess_util.cc
new file mode 100644
index 0000000..dd639ff
--- /dev/null
+++ b/src/lib/util/unittests/interprocess_util.cc
@@ -0,0 +1,42 @@
+// Copyright (C) 2013-2015 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <gtest/gtest.h>
+
+#include <sys/select.h>
+#include <cstddef>
+
+namespace isc {
+namespace util {
+namespace unittests {
+
+unsigned char
+parentReadState(int fd) {
+  unsigned char result = 0xff;
+
+  fd_set rfds;
+  FD_ZERO(&rfds);
+  FD_SET(fd, &rfds);
+
+  struct timeval tv = {5, 0};
+
+  const int nfds = select(fd + 1, &rfds, NULL, NULL, &tv);
+  EXPECT_EQ(1, nfds);
+
+  if (nfds == 1) {
+      // Read status
+      const ssize_t bytes_read = read(fd, &result, sizeof(result));
+      EXPECT_EQ(sizeof(result), bytes_read);
+  }
+
+  return (result);
+}
+
+}
+}
+}