[monitor windows files] Monitors files and folders or directories. #system #windows

monitor.py

import time
from pathlib import Path

import pywintypes
import win32con
import win32file
import winerror

WATCHED_DIR = str(Path("./").absolute())

FILE_ACTIONS = {
    1: "created",
    2: "deleted",
    3: "updated",
    4: "renamed from",
    5: "renamed to",
}


def main():
    ol = pywintypes.OVERLAPPED()
    buf = win32file.AllocateReadBuffer(1024)

    # get directory handle
    hDir = win32file.CreateFile(
        WATCHED_DIR,  # fileName
        0x0001,  # FILE_LIST_DIRECTORY           # desiredAccess
        win32con.FILE_SHARE_READ
        | win32con.FILE_SHARE_WRITE  # shareMode
        | win32con.FILE_SHARE_DELETE,
        None,  # attributes
        win32con.OPEN_EXISTING,  # CreationDisposition
        win32con.FILE_FLAG_BACKUP_SEMANTICS
        | win32con.FILE_FLAG_OVERLAPPED,  # flagsAndAttributes  # async
        None,  # hTemplateFile
    )

    while True:
        # read directory changes async
        win32file.ReadDirectoryChangesW(
            hDir,  # handle
            buf,  # buffer
            True,  # bWatchSubtree
            win32con.FILE_NOTIFY_CHANGE_FILE_NAME
            | win32con.FILE_NOTIFY_CHANGE_DIR_NAME  # dwNotifyFilter
            | win32con.FILE_NOTIFY_CHANGE_ATTRIBUTES
            | win32con.FILE_NOTIFY_CHANGE_SIZE
            | win32con.FILE_NOTIFY_CHANGE_LAST_WRITE
            | win32con.FILE_NOTIFY_CHANGE_SECURITY,
            ol,  # overlapped
        )

        bytes = None

        # wait for changes
        while bytes == None:
            try:
                bytes = win32file.GetOverlappedResult(
                    hDir, ol, False  # hFile  # overlapped  # bWait
                )

            except pywintypes.error as err:
                if err.winerror == winerror.ERROR_IO_INCOMPLETE:
                    # not available yet, wait for a bit
                    time.sleep(0.1)

                else:
                    # other error...
                    raise err

        # get changes from buffer
        result = win32file.FILE_NOTIFY_INFORMATION(buf, bytes)

        # print results
        for action, filename in result:
            print(FILE_ACTIONS.get(action, "Unknown"), filename)

        print("---")


if __name__ == "__main__":
    main()