msgget


>>-msgget--key--+-----------------------+----------------------><
                '-flag--+-------------+-'   
                        '-permissions-'

Function

msgget locates or creates a message queue.

Parameters

key

The message queue key. key must be 4 bytes.

flag

The type of connection to the message queue. It can be 0 to get the existing queue, or it can be a sum of any of the following:

1: ipc_create. This is the default.
2: ipc_excl
4: ipc_rcvtypepid
8: ipc_sndtypepid

permissions

The permission settings in octal. The default is 600.

Example

'msgget WJSQ' 
qid=retval

Usage notes

Upon return, RETVAL contains -1 if the service fails. Otherwise, the queue ID is returned.