Determine if a file is done being written from windows to linux

Asked Jun 09 '21 at 07:41

Active Jun 09 '21 at 12:34

Viewed 119 times

I have python process (running on linux) was listen to directory.

Another process (running on Windows), write files to the same directory which the linux python process listen to.

I want to handle file only when if the file done being written to.

I'm trying to suggesting from Need a way to determine if a file is done being written to.

Trying also to open the file with w mode, Trying to check the date modified of the file periodically but in linux it's changed only when the file is finish to write (and I don't know like that if the file still writting or it's done).

All of that I have been tried is failed and i'm not able to know if the the windows process finish to write the file into the directory.

NOTE: I don't have the source code of the windows process - blackbox.

How can I solve it?

edited Jun 09 '21 at 12:34

asked Jun 09 '21 at 07:41

Mar Teen

Use a lockfile with a library like https://pypi.org/project/fasteners/ . – AKX Jun 09 '21 at 07:43
Might be related: https://stackoverflow.com/questions/30531477/how-do-i-watch-a-file-not-a-directory-for-changes-using-python – Maurice Meyer Jun 09 '21 at 07:45
I dont have the source code of the windows process – Mar Teen Jun 09 '21 at 07:46
You’re basically out of luck: there is *no way* to make this work with your constraints. You’ll need a workaround, such as creating a second process on Windows which tests if the first process terminated, and which communicates with your Linux process. – Konrad Rudolph Jun 09 '21 at 07:49
@KonradRudolph which another alternatives I have? – Mar Teen Jun 09 '21 at 08:11
@MarTeen I can’t think of any that are practical. Having a monitoring process running on the Windows machine is definitely the easiest, and might be the only one that’s feasible at all. – Konrad Rudolph Jun 09 '21 at 08:35
@KonradRudolph what about check ```os.path.getmtime``` it's could help? – Mar Teen Jun 09 '21 at 08:46
That doesn’t help. – Konrad Rudolph Jun 09 '21 at 08:46
@KonradRudolph why not? – Mar Teen Jun 09 '21 at 12:33
What do you mean? It doesn't work because it doesn't do anything useful in this context. How do you think it would help you? – Konrad Rudolph Jun 09 '21 at 12:35

Determine if a file is done being written from windows to linux

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