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 CMW audit tokens. No global “name” uniquely identifies IPC objects. Instead, they are identified by their handles, which are valid only during the time the IPC objects are active. The identification should not be a problem since the System V IPC mechanisms are seldom used, and they 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 25–8 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.
Figure 25–16 ipc Token Format
- © 2010, Oracle Corporation and/or its affiliates