Safari Books Online is a digital library providing on-demand subscription access to thousands of learning resources.
The post-revprop-change hook is run immediately after the modification of a revision property when performed outside the scope of a normal commit. As you can derive from the description of its counterpart (the pre-revprop-change hook), this hook will not run at all unless the pre-revprop-change hook is implemented. It is typically used to send email notification of the property change.
If the post-revprop-change hook returns a nonzero exit status, the change will not be aborted, since it has already completed. However, anything that the hook printed to stderr will be marshaled back to the client, making it easier to diagnose hook failures.