Working with CP special messagesEdit online You might have to send, access, or respond to CP special messages.Sending CP special messagesIssue a CP SMSG command from a CP or CMS session or from Linux® to send a CP special message.Accessing CP special messages through uevent environment variablesA uevent for a CP special message contains environment variables that you can use to access the message.Writing udev rules for handling CP special messagesWhen using the CP special messages device driver, CP special messages trigger uevents.Example udev ruleThe udev rules that process CP special messages identify particular messages and define one or more specific actions as a response.Parent topic: z/VM special messages uevent support