The return token contains the return status of the system call (u_error) and the process return value (u_rval1). This token has three fields:
a token ID that identifies this token as a return token
the error status of the system call
the system call return value
The return token is always returned as part of kernel-generated audit records for system calls. This token indicates exit status and other return values in application auditing.
The praudit command displays the return token as follows: