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Alternative to bootstrap_register?
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Alternative to bootstrap_register?

In <servers/bootstrap.h> there is the following note about the bootstrap_register() call:

* This API is deprecated. Old scenarios and recommendations:
* 1) Code that used to call bootstrap_check_in() and then bootstrap_register()
*    can now always call bootstrap_check_in().
* 2) If the code was registering a well known name, please switch to launchd.
* 3) If the code was registering a dynamically generated string and passing
*    the string to other applications, please rewrite the code to send a Mach
*    send-right directly.

In case of suggestion #3, the application that used to call bootstrap_register only has the pid of the target application to which to "send a Mach send-right directly".

In order to send a Mach send right however one needs a send right itself to a port to which the target application has receive rights. In order to get that send right, the target application itself also needs to send this application a Mach send right, however in order send that send right it also needs a send right to send it and the loop never ends.

Does anyone know what paragraph 3) means to achieve and how, possibly with a short example?

To be noted, the open source CFMessagePortCreateLocal() still uses bootstrap_register years later after the API has been marked as deprecated.

-- Uli Kusterer
"The witnesses of TeachText are everywhere..."

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