Live Logs Mid-Process?

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Posts: 3
Joined: 11 Mar 2026

magicjj

Based on my searching I am guessing that this is not possible but I figured it's worth asking.

I've setup a simple web service so I can check backup statuses from my phone. I can also kick off my backup job from my phone. But it would be awesome if, after starting the job, I could see some form of progress indication.

The app already exposes the most recent log file but that log file is not created until the end of the sync process.

So I'm wondering if there is any sort of log file anywhere that would give me some indication of progress while a sync is happening. It doesn't even need to be a log file, I'd be happy with any file system indication that the process is running that I can poll from my node service. Any ideas?

While I'm here I have seen multiple posts in my searching referencing a LastSyncs.log file. Has this been deprecated? In my app data folder I see LastRun.ffs_gui, GlobalSettings.xml, and Logs subdir. Just making sure I'm not missing anything.

I hope to share this simple web service when I have it buttoned up. Any help would be appreciated!
Posts: 170
Joined: 5 Jan 2024

John1234

This is the best I can think of. Ffs I do not believe has a continuously flowing indicator that you can monitor on a web page.

Is there any continuous indicator?

If you need to see active movement from another app, your best bet is to monitor the temporary files FreeFileSync creates.

By default, FFS copies files using a temporary name (like file.ext.ffs_tmp). If your monitoring app scans the destination directory and sees files ending in .ffs_tmp, you know for a fact that a sync is currently "hot" and moving data.
Posts: 4908
Joined: 11 Jun 2019

xCSxXenon

This is the best I can think of. Ffs I do not believe has a continuously flowing indicator that you can monitor on a web page.

Is there any continuous indicator?

If you need to see active movement from another app, your best bet is to monitor the temporary files FreeFileSync creates.

By default, FFS copies files using a temporary name (like file.ext.ffs_tmp). If your monitoring app scans the destination directory and sees files ending in .ffs_tmp, you know for a fact that a sync is currently "hot" and moving data. John1234, 24 Mar 2026, 07:19
This is pointless because you can also just check if a log exists yet of the backup that is running
Posts: 1222
Joined: 8 May 2006

therube

(On Windows), the Index Journal ... logs ... stuff.
If you had a utility to read the Index Journal, might be able to do something on that end?

Everything 1.5a, can monitor the Window Index Journal.
(1.5a does not have an ARM version [yet, though I'll suppose at some point it is intended?]. [Likewise, not being familiar with "phones", I'm assuming that ARM has something to do with phones? Everything 1.4 does have an ARM version, but does not have Index Journal.)
https://www.voidtools.com/forum/viewtopic.php?f=12&t=9792

Maybe there are other utilities out there that can monitor the (Windows) Index Journal?
Posts: 170
Joined: 5 Jan 2024

John1234

Process Monitor from SysInternals would probably be a very good choice.
Posts: 4908
Joined: 11 Jun 2019

xCSxXenon

If OP is just looking for a "running" indication, can't you just parse the processes list for the FFS executable?
tasklist | find "FreeFileSync_x64.exe"
Evaluate %errorlevel% to determine if it's running