The au_open() function returns an audit record descriptor to which audit tokens can be written using au_write(). The audit record descriptor is an integer value that identifies a storage area where audit records are accumulated.

The au_close() function terminates the life of an audit record d of type event started by au_open(). If the keep parameter is AU_TO_NO_WRITE, the data contained therein is discarded. If the keep parameter is AU_TO_WRITE, the additional parameters are used to create a header token. Depending on the audit policy information obtained by auditon(2), additional tokens such as sequence and trailer tokens can be added to the record. The au_close() function then writes the record to the audit trail by calling audit(2). Any memory used is freed by calling free(3C).

The au_write() function adds the audit token pointed to by m to the audit record identified by the descriptor d. After this call is made the audit token is no longer available to the caller.

Upon successful completion, au_open() returns an audit record descriptor. If a descriptor could not be allocated, au_open() returns -1 and sets errno to indicate the error.

Upon successful completion, au_close() returns 0. If d is an invalid or corrupted descriptor or if audit() fails, au_close() returns -1 without setting errno. If audit() fails, errno is set to one of the error values described on the audit(2) manual page.

Upon successful completion, au_write() returns 0. If d is an invalid descriptor or m is an invalid token, or if audit() fails, au_write() returns -1 without setting errno. If audit() fails, errno is set to one of the error values described on the audit(2) manual page.

The au_open() function will fail if:

ENOMEM

The physical limits of the system have been exceeded such that sufficient memory cannot be allocated.

EAGAIN

There is currently insufficient memory available. The application can try again later.

See attributes (5) for descriptions of the following attributes:

bsmconv(1M), audit(2), auditon(2), au_preselect(3BSM), au_to(3BSM), free(3C), attributes(5)

The functionality described in this man page is available only if the Basic Security Module (BSM) has been enabled. See bsmconv(1M) for more information.