Passes a control message.
The putctl utility creates a control message of the type specified by the type parameter, and calls the put procedure of the queue pointed to by the q parameter. The argument of the put procedure is a pointer to the created message. The putctl utility allocates new blocks by calling the allocb utility.
This utility is part of STREAMS Kernel Extensions.
| Item | Description |
|---|---|
| q | Specifies the queue that contains the desired put procedure. |
| type | Specifies the type of control message to create. |
On successful completion, the putctl utility returns a value of 1. It returns a value of 0 if it cannot allocate a message block, or if the value of the type parameter is M_DATA, M_PROTO, M_PCPROTO, or M_DELAY.