Contents

ctl_register

Declaration

errno_t ctl_register(struct kern_ctl_reg *userkctl, kern_ctl_ref *kctlref);

Parameters

  • userkctl:

    A structure defining the kernel control to be attached. The ctl_connect callback must be specified, the other callbacks are optional. If ctl_connect is set to zero, ctl_register fails with the error code EINVAL.

  • kctlref:

    Upon successful return, the kctlref will contain a reference to the attached kernel control. This reference is used to unregister the kernel control. This reference will also be passed in to the callbacks each time they are called.

Return Value

0 - Kernel control was registered. EINVAL - The registration structure was not valid. ENOMEM - There was insufficient memory. EEXIST - A controller with that id/unit is already registered.

Discussion

Register a kernel control. This will enable clients to connect to the kernel control using a PF_SYSTEM socket.

See Also

control