1 files changed, 83 insertions, 0 deletions
diff --git a/src/components/utils/src/signals_posix.cc b/src/components/utils/src/signals_posix.cc
new file mode 100644
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+++ b/src/components/utils/src/signals_posix.cc
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2016, Ford Motor Company
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * Neither the name of the Ford Motor Company nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <csignal>
+#include <cstdlib>
+#include <stdint.h>
+
+#include "utils/signals.h"
+
+bool utils::UnsibscribeFromTermination() {
+  // Disable some system signals receiving in thread
+  // by blocking those signals
+  // (system signals processes only in the main thread)
+  // Mustn't block all signals!
+  // See "Advanced Programming in the UNIX Environment, 3rd Edition"
+  // (http://poincare.matf.bg.ac.rs/~ivana//courses/ps/sistemi_knjige/pomocno/apue.pdf,
+  // "12.8. Threads and Signals".
+  sigset_t signal_set;
+  sigemptyset(&signal_set);
+  sigaddset(&signal_set, SIGINT);
+  sigaddset(&signal_set, SIGTERM);
+
+  return !pthread_sigmask(SIG_BLOCK, &signal_set, NULL);
+}
+
+namespace {
+bool CatchSIGSEGV(sighandler_t handler) {
+  struct sigaction act;
+
+  act.sa_handler = handler;
+  sigemptyset(&act.sa_mask);
+  act.sa_flags = 0;
+
+  return !sigaction(SIGSEGV, &act, NULL);
+}
+}  // namespace
+
+bool utils::WaitTerminationSignals(sighandler_t sig_handler) {
+  sigset_t signal_set;
+  int sig = -1;
+
+  sigemptyset(&signal_set);
+  sigaddset(&signal_set, SIGINT);
+  sigaddset(&signal_set, SIGTERM);
+
+  if (!CatchSIGSEGV(sig_handler)) {
+    return false;
+  }
+
+  if (!sigwait(&signal_set, &sig)) {
+    sig_handler(sig);
+    return true;
+  }
+  return false;
+}