https://github.com/codylane/python_signalhandler

Cool little library for trapping and handling signals and performing a custom action
https://github.com/codylane/python_signalhandler

Last synced: 4 days ago
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Cool little library for trapping and handling signals and performing a custom action

• Host: GitHub
• URL: https://github.com/codylane/python_signalhandler
• Owner: codylane
• Created: 2014-01-25T18:20:48.000Z (almost 11 years ago)
• Default Branch: master
• Last Pushed: 2014-02-01T20:28:21.000Z (almost 11 years ago)
• Last Synced: 2023-08-03T01:12:22.652Z (over 1 year ago)
• Language: Python
• Size: 172 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
python-signalhandler

====================

Cool little library for trapping and handling signals and performing a custom action.  This code was created back in 2009 when I had a need to write a custom daemon in python.  The original daemon code was found here, http://www.jejik.com/articles/2007/02/a_simple_unix_linux_daemon_in_python/ and this signal handler code was used to processing IPC signals to inform the daemon code to perform special actions.

Example Code sighandler.py

==========================

```

import signal

import os

import sys

from SignalHandler import SignalHandler

def stop():

    print "Called the stop().... Exitting 0"

    sys.exit(0)

def abort():

    print "Called abort().... Exitting 1"

    sys.exit(1)

if __name__ == '__main__':

    # Create SignalHandler object

    sighandler = SignalHandler()

    # Now register a SIGTERM (kill -15) and callback

    # object when signal is trapped.

    sighandler.register( signal.SIGTERM, stop)

    # Register a SIGINT (kill -2) and callback

    # object when sign is trapped.

    # This is equivalent to CTRL-C

    sighandler.register( signal.SIGINT, abort )

    # Display the current registered signal events.

    # This is just for show and tell purposes.

    print "Implemented Signals: ", sighandler.getActions()

    while True:

        print "Waiting for signal.... Running pid: %s" %(os.getpid())

        signal.pause()

```

Example Usage From Code Above

=============================

```

$ ./sighandler.py &

[1] 5277

Implemented Signals:  (, )

Waiting for signal.... Running pid: 5277

$ kill 5277

Called the stop().... Exitting 0

$

```