| AU_IO(3) | Library Functions Manual | AU_IO(3) |
au_fetch_tok,
au_print_tok,
au_print_flags_tok,
au_read_rec — perform I/O
involving an audit record
Basic Security Module Library (libbsm, -lbsm)
<bsm/libbsm.h>
int
au_fetch_tok(tokenstr_t
*tok, u_char *buf, int
len) void
au_print_tok(FILE *outfp,
tokenstr_t *tok, char *del,
char raw, char sfrm);
void
au_print_flags_tok(FILE
*outfp, tokenstr_t *tok, char
*del, int oflags); int
au_read_rec(FILE *fp,
u_char **buf)
These interfaces support input and output (I/O) involving audit records, internalizing an audit record from a byte stream, converting a token to either a raw or default string, and reading a single record from a file.
The
au_fetch_tok()
function reads a token from the passed buffer buf of
length len bytes, and returns a pointer to the token
via tok.
The
au_print_tok()
function prints a string form of the token tok to the
file output stream outfp, either in default mode, or
raw mode if raw is set non-zero. The delimiter
del is used when printing. The
au_print_flags_tok()
function is a replacement for au_print_tok(). The
oflags controls how the output should be formatted and
is specified by or'ing the following flags:
AU_OFLAG_NONEAU_OFLAG_NORESOLVEAU_OFLAG_RAWAU_OFLAG_SHORTAU_OFLAG_XMLThe flags options AU_OFLAG_SHORT and AU_OFLAG_RAW are exclusive and should not be used together.
The
au_read_rec()
function reads an audit record from the file stream
fp, and returns an allocated memory buffer containing
the record via *buf, which must be freed by the caller
using free(3).
A typical use of these routines might open a
file with fopen(3), then read records
from the file sequentially by calling
au_read_rec().
Each record would be broken down into components tokens through sequential
calls to au_fetch_tok() on the buffer, and then
invoking au_print_flags_tok() to print each token to
an output stream such as stdout. On completion of
the processing of each record, a call to
free(3) would be used to free the record
buffer. Finally, the source stream would be closed by a call to
fclose(3).
On success, au_fetch_tok() returns 0 and
au_read_rec() returns the length of
buf. Both functions return -1 on failure along with
additional error information returned via errno.
The OpenBSM implementation was created by McAfee Research, the security division of McAfee Inc., under contract to Apple Computer, Inc., in 2004. It was subsequently adopted by the TrustedBSD Project as the foundation for the OpenBSM distribution.
The au_print_flags_tok() function was
added by Stacey Son as a replacement for the
au_print_tok() so new output formatting flags can be
easily added without changing the API. The
au_print_tok() is obsolete but remains in the API to
support legacy code.
This software was created by Robert Watson, Wayne Salamon, and Suresh Krishnaswamy for McAfee Research, the security research division of McAfee, Inc., under contract to Apple Computer, Inc.
The Basic Security Module (BSM) interface to audit records and audit event stream format were defined by Sun Microsystems.
The errno variable may not always be properly set in the event of an error.
| August 4, 2009 | macOS 15.0 |