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FSEvents.LastEventIdForDeviceBeforeTime
Queries event ID for a given time on a device.
| Component | Version | macOS | Windows | Linux | Server | FileMaker iOS SDK |
| FSEvents | 6.0 | Yes | No | No | Yes, macOS only | No |
MBS( "FSEvents.LastEventIdForDeviceBeforeTime"; Path; TimeStamp ) More
Parameters
| Parameter | Description | Example |
|---|---|---|
| Path | The path to the disk. | "/" |
| TimeStamp | The timestamp to use. |
Result
Returns ID or error.
Description
Queries event ID for a given time on a device.Gets the last event ID for the given device that was returned before the given time. This is conservative in the sense that if you then use the returned event ID as the sinceWhen parameter of FSEvents.CreateRelativeToDevice that you will not miss any events that happened since that time. On the other hand, you might receive some (harmless) extra events.
Beware: there are things that can cause this to fail to be accurate. For example, someone might change the system's clock (either backwards or forwards). Or an external drive might be used on different systems without perfectly synchronized clocks.
Examples
Queries event ID for root device:
MBS( "FSEvents.LastEventIdForDeviceBeforeTime"; "/"; Date( 1 ; 1 ; 2015 ) )
See also
Created 29th November 2015, last changed 12nd August 2017
FSEvents.HasNextEvent - FSEvents.LatestEventId
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