Hello Team,

We are working on a use-case, where the reboot / shutdown / poweroff of the
system has to be blocked based on some X conditions.

These X conditions will get verified (may be by running scripts/service)
instantly, when the reboot  / shutdown / poweroff command gets triggered.

Please, advise us on the above topic and provide pointers to any available
implementation.

*Note:*
For the above use-case we won't be in a position to apply the* reboot-guard
in advance*.

Best Regards,
Suresh