Handling Unknown values in triggers
Hi,
I'm trying to make a trigger that triggers if a certain file exists has 0 size. However, the obvious trigger expression {HOST:vfs.file.size[/tmp/foo].last(0)}=0 will of course turn UNKNOWN whenever the file doesn't exist rather than OK.
I tried going around it by adding {HOST:vfs.file.size[/tmp/foo].nodata(110)}=1 | {HOST:vfs.file.size[/tmp/foo].last(0)}=0 but this still seems to be setting the trigger value to UNKNOWN.
Any idea of how to get around this?
I'm trying to make a trigger that triggers if a certain file exists has 0 size. However, the obvious trigger expression {HOST:vfs.file.size[/tmp/foo].last(0)}=0 will of course turn UNKNOWN whenever the file doesn't exist rather than OK.
I tried going around it by adding {HOST:vfs.file.size[/tmp/foo].nodata(110)}=1 | {HOST:vfs.file.size[/tmp/foo].last(0)}=0 but this still seems to be setting the trigger value to UNKNOWN.
Any idea of how to get around this?