The door_return() function returns from a door invocation. It returns control to the thread that issued the associated door_call() and blocks waiting for the next door invocation. See door_call(3DOOR). Results, if any, from the door invocation are passed back to the client in the buffers pointed to by data_prt and desc_ptr. If there is not a client associated with the door_return(), the calling thread discards the results, releases any passed descriptors with the DOOR_RELEASE attribute, and blocks waiting for the next door invocation.

Upon successful completion, door_return() does not return to the calling process. Otherwise, door_return() returns -1 to the calling process and sets errno to indicate the error.

The door_return() function fails and returns to the calling process if:

E2BIG

Arguments were too big for client.

EFAULT

The address of data_prt or desc_ptr is invalid.

EINVAL

Invalid door_return() arguments were passed or a thread is bound to a door that no longer exists.

EMFILE

The client has too many open descriptors.

See attributes(5) for descriptions of the following attributes:

door_call(3DOOR)