+The
+.Fn getaudit_addr
+system call
+retrieves extended state via
+.Fa auditinfo_addr
+and
+.Fa length .
+.Pp
+The
+.Fa auditinfo_t
+data structure is defined as follows:
+.nf
+.in +4n
+struct auditinfo {
+ au_id_t ai_auid; /* Audit user ID */
+ au_mask_t ai_mask; /* Audit masks */
+ au_tid_t ai_termid; /* Terminal ID */
+ au_asid_t ai_asid; /* Audit session ID */
+};
+typedef struct auditinfo auditinfo_t;
+.in
+.fi
+.Pp
+The
+.Fa ai_auid
+variable contains the audit identifier which is recorded in the audit log for
+each event the process caused.
+.Pp
+The
+.Fa au_mask_t
+data structure defines the bit mask for auditing successful and failed events
+out of the predefined list of event classes. It is defined as follows:
+.nf
+.in +4n
+struct au_mask {
+ unsigned int am_success; /* success bits */
+ unsigned int am_failure; /* failure bits */
+};
+typedef struct au_mask au_mask_t;
+.in
+.fi
+.Pp
+The
+.Fa au_termid_t
+data structure defines the Terminal ID recorded with every event caused by the
+process. It is defined as follows:
+.nf
+.in +4n
+struct au_tid {
+ dev_t port;
+ u_int32_t machine;
+};
+typedef struct au_tid au_tid_t;
+.in
+.fi
+.Pp
+The
+.Fa ai_asid
+variable contains the audit session ID which is recorded with every event
+caused by the process.
+.Pp
+The
+.Fn getaudit_addr
+system call
+uses the expanded
+.Fa auditinfo_addr_t
+data structure supports Terminal IDs with larger addresses such as those used
+in IP version 6. It is defined as follows:
+.nf
+.in +4n
+struct auditinfo_addr {
+ au_id_t ai_auid; /* Audit user ID. */
+ au_mask_t ai_mask; /* Audit masks. */
+ au_tid_addr_t ai_termid; /* Terminal ID. */
+ au_asid_t ai_asid; /* Audit session ID. */
+ u_int64_t ai_flags; /* Audit session flags. */
+};
+typedef struct auditinfo_addr auditinfo_addr_t;
+.in
+.fi
+.Pp
+The
+.Fa au_tid_addr_t
+data structure which includes a larger address storage field and an additional
+field with the type of address stored:
+.nf
+.in +4n
+struct au_tid_addr {
+ dev_t at_port;
+ u_int32_t at_type;
+ u_int32_t at_addr[4];
+};
+typedef struct au_tid_addr au_tid_addr_t;
+.in
+.fi
+.Pp
+Without appropriate privilege the audit mask fields will be set to all
+ones.