Signal handling function introduced

gpoa/util/signals.py

@@ -0,0 +1,31 @@
+#
+# GPOA - GPO Applier for Linux
+#
+# Copyright (C) 2019-2020 BaseALT Ltd.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import signal
+from sys import exit
+
+from .arguments import ExitCodeUpdater
+
+default_handler = signal.getsignal(signal.SIGINT)
+
+def signal_handler(sig_number, frame):
+    # Ignore extra signals
+    signal.signal(sig_number, signal.SIG_IGN)
+    print('Received signal, exiting gracefully')
+    exit(ExitCodeUpdater.EXIT_SIGINT)
+