mtime2system - Set Windows System time to a file modification time

README.md

mtime2system

Set Windows System time to a file modification time.

Requirements

• Python 3
• pywin32

Use

1. Open a command prompt (cmd.exe)
2. Run script with the desired file path, e.g.:

mtime2system.py "C:\test_filename.txt"

mtime2system.py

#!/usr/bin/env python
import time
import os.path
import sys
import win32api  # http://sourceforge.net/projects/pywin32/files/pywin32/Build%20220/
from datetime import datetime


def get_mtime(file_path: str) -> datetime:
    timestamp = os.path.getmtime(file_path)
    return datetime.fromtimestamp(timestamp)


def convert_local_time_to_utc(t: time.struct_time) -> time.struct_time:
    seconds = time.mktime(t)
    return time.gmtime(seconds)


def set_system_time(new_date: datetime):
    local_time = new_date.timetuple()
    utc_time = convert_local_time_to_utc(local_time)

    win32api.SetSystemTime(
        utc_time.tm_year, utc_time.tm_mon, utc_time.tm_wday, utc_time.tm_mday,
        utc_time.tm_hour, utc_time.tm_min, utc_time.tm_sec, new_date.microsecond // 1000
    )


def main(arguments: list):
    if len(arguments) < 1:
        print('Missing file path!', file=sys.stderr)
        return 1

    file_path = arguments[0]

    try:
        file_mtime = get_mtime(file_path)
    except FileNotFoundError:
        print('File not exist: {!s}'.format(file_path), file=sys.stderr)
        return 1

    set_system_time(file_mtime)

    print('System time successfully set to {!s}'.format(file_mtime))
    return 0

if __name__ == '__main__':
    exit_code = main(sys.argv[1:])
    sys.exit(exit_code)