ipc Token (System Administration Guide: Security Services)

System Administration Guide: Security Services

`ipc` Token

The ipc token contains the System V IPC message/semaphore/shared-memory handle that is used by the caller to identify a particular IPC object. The ipc token has three fields:

A token ID that identifies this token as an IPC token
A type field that specifies the type of IPC object
The handle that identifies the IPC object

The praudit command displays the ipc token as follows:

IPC,msg,3

Note –

The IPC object identifiers violate the context-free nature of the Solaris audit tokens. No global “name” uniquely identifies IPC objects. Instead, IPC objects are identified by their handles. The handles are valid only during the time that the IPC objects are active. However, the identification of IPC objects should not be a problem. The System V IPC mechanisms are seldom used, and the mechanisms all share the same audit class.

The following table shows the possible values for the IPC object type field. The values are defined in the /usr/include/bsm/audit.h file.

Table 23–7 Values for the IPC Object Type Field


Name	Value	Description
`AU_IPC_MSG`	1	IPC message object
`AU_IPC_SEM`	2	IPC semaphore object
`AU_IPC_SHM`	3	IPC shared-memory object

The following figure shows the format of an ipc token.

ipc Token

Figure 23–16 ipc Token Format

`ipc` Token

Figure 23–16 `ipc` Token Format