87 lines
2.4 KiB
Python
87 lines
2.4 KiB
Python
#!/usr/bin/env python3
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import os
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import socket
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from datetime import date
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from datetime import datetime
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# Determine if the OS is MS Windows
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if os.name == 'nt':
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# Set the location of the file to write to, in the user Documents directory
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logfile = os.path.join(os.path.join(os.environ['USERPROFILE']),
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r'Documents\login.log')
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# For OS which are not MS Windows
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else:
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logfile = os.path.join(os.path.join(os.environ['HOME']),
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r'Documents/login.log')
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# Create the file if it does not exist yet
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if not os.path.exists(logfile):
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with open(logfile, 'w'):
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pass
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# Determine the current date and time
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today = date.today()
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now = datetime.now()
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current_day = today.strftime("%d.%m.%Y")
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current_time = now.strftime("%H:%M:%S")
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# Determine the client hostname
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client_hostname = os.getenv("CLIENTNAME")
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# Determine the client hostname via a different method
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# in case the first one failed
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if client_hostname is None:
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client_hostname = socket.gethostbyaddr(socket.gethostname())[0]
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# Class for prepending the information to the log file
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class Prepender(object):
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def __init__(self,
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file_path,
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):
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# Read in the existing file, so we can write it back later
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with open(file_path, mode='r') as f:
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self.__write_queue = f.readlines()
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self.__open_file = open(file_path, mode='w')
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def write_line(self, line):
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self.__write_queue.insert(0,
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"%s\n" % line,
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)
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def write_lines(self, lines):
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lines.reverse()
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for line in lines:
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self.write_line(line)
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def close(self):
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self.__exit__(None, None, None)
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def __enter__(self):
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return self
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def __exit__(self, type, value, traceback):
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if self.__write_queue:
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self.__open_file.writelines(self.__write_queue)
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self.__open_file.close()
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# Prepend the determined information to the top of the log file
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with Prepender(logfile) as f:
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# Must write individual lines in reverse order
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f.write_line(current_day+' - '+current_time+' - '+client_hostname)
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# Or, use write_lines instead - that maintains order.
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# with Prepender(logfile) as f:
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# f.write_lines(
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# ['This will be line 1',
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# 'This will be line 2',
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# 'This will be line 3',
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# ]
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# )
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