package.json: Update react package dependency

Closes #211

bots/machine/machine_core/timeout.py

@@ -0,0 +1,52 @@
+# This file is part of Cockpit.
+#
+# Copyright (C) 2013 Red Hat, Inc.
+#
+# Cockpit is free software; you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation; either version 2.1 of the License, or
+# (at your option) any later version.
+#
+# Cockpit 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
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with Cockpit; If not, see <http://www.gnu.org/licenses/>.
+
+import signal
+
+
+class Timeout:
+    """ Add a timeout to an operation
+        Specify machine to ensure that a machine's ssh operations are canceled when the timer expires.
+    """
+    def __init__(self, seconds=1, error_message='Timeout', machine=None):
+        if signal.getsignal(signal.SIGALRM) != signal.SIG_DFL:
+            # there is already a different Timeout active
+            self.seconds = None
+            return
+
+        self.seconds = seconds
+        self.error_message = error_message
+        self.machine = machine
+
+    def handle_timeout(self, signum, frame):
+        if self.machine:
+            if self.machine.ssh_process:
+                self.machine.ssh_process.terminate()
+            self.machine.disconnect()
+
+        raise RuntimeError(self.error_message)
+
+    def __enter__(self):
+        if self.seconds:
+            signal.signal(signal.SIGALRM, self.handle_timeout)
+            signal.alarm(self.seconds)
+
+    def __exit__(self, type, value, traceback):
+        if self.seconds:
+            signal.alarm(0)
+            signal.signal(signal.SIGALRM, signal.SIG_DFL)
+