Adds some error handling to the socket implementation.

runtime/bin/eventhandler_linux.cc

Index: runtime/bin/eventhandler_linux.cc
diff --git a/runtime/bin/eventhandler_linux.cc b/runtime/bin/eventhandler_linux.cc
index fd410fece963efeb0dbf82db849ec03da3ea1299..8b35818ccd680ccf936c8ab4561e0bf569db23ac 100644
--- a/runtime/bin/eventhandler_linux.cc
+++ b/runtime/bin/eventhandler_linux.cc
@@ -80,9 +80,15 @@ EventHandlerImplementation::EventHandlerImplementation()
   if (result != 0) {
     FATAL("Pipe creation failed");
   }
-  FDUtils::SetNonBlocking(interrupt_fds_[0]);
-  FDUtils::SetCloseOnExec(interrupt_fds_[0]);
-  FDUtils::SetCloseOnExec(interrupt_fds_[1]);
+  if (!FDUtils::SetNonBlocking(interrupt_fds_[0])) {
+    FATAL("Failed to set pipe fd non blocking\n");
+  }
+  if (!FDUtils::SetCloseOnExec(interrupt_fds_[0])) {
+    FATAL("Failed to set pipe fd close on exec\n");
+  }
+  if (!FDUtils::SetCloseOnExec(interrupt_fds_[1])) {
+    FATAL("Failed to set pipe fd close on exec\n");
+  }
   shutdown_ = false;
   // The initial size passed to epoll_create is ignore on newer (>=
   // 2.6.8) Linux versions
@@ -91,7 +97,9 @@ EventHandlerImplementation::EventHandlerImplementation()
   if (epoll_fd_ == -1) {
     FATAL1("Failed creating epoll file descriptor: %i", errno);
   }
-  FDUtils::SetCloseOnExec(epoll_fd_);
+  if (!FDUtils::SetCloseOnExec(epoll_fd_)) {
+    FATAL("Failed to set epoll fd close on exec\n");
+  }
   // Register the interrupt_fd with the epoll instance.
   struct epoll_event event;
   event.events = EPOLLIN;