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In the manual of systemd.path, it is said that the "conditions" can be combined, however it is not said how.

I guess it is a logical "and", and if you want to do a logical "or" you should use multiple path triggering the same target. Am I right?

Edit: As an example, I have a A.path triggered for a certain amount of time by a timer, it triggers A.service that empty a queue folder.

  • If queue is not empty when A.path is triggered, I want A.service to start; DirectoryNotEmpty do this.

  • If file are added to queue during the functionning period, I also want it to start; PathModified monitors files added/removed, but only during the functioning period and won't trigger the service if the files have been added outside of the functioning period.

So in the end, I want it to run if the queue directory is not empty when started, or if the content of queue is modified during the functioning period.

How can I do this?

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Use a vertical pipe before each condition that stands alone.

From the freedesktop manual page:

If multiple conditions are specified, the unit will be executed if all of them apply (i.e. a logical AND is applied). Condition checks can be prefixed with a pipe symbol (|) in which case a condition becomes a triggering condition. If at least one triggering condition is defined for a unit, then the unit will be executed if at least one of the triggering conditions apply and all of the non-triggering conditions.

  • Sorry I was not clear enough, I did not mean conditions but the [Path] options like DirectorNotEmpty. – Abitbol Jul 12 at 14:39
  • I have added an example to give some context. – Abitbol Jul 12 at 14:50

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