auditsvc

- write audit log to specified file descriptor

Synopsis

cc [ flag... ] file... -lbsm -lsocket -lnsl  [ library... ]
#include <sys/param.h>
#include <bsm/audit.h>

int auditsvc(int fd, int limit);

Description

The auditsvc() function specifies the audit log file to the kernel. The kernel writes audit records to this file until an exceptional condition occurs and then the call returns. The fd argument is a file descriptor that identifies the audit file. Applications should open this file for writing before calling auditsvc().

The limit argument specifies the number of free blocks that must be available in the audit file system, and causes auditsvc() to return when the free disk space on the audit filesystem drops below this limit. Thus, the invoking program can take action to avoid running out of disk space.

The auditsvc() function does not return until one of the following conditions occurs:

• The process receives a signal that is not blocked or ignored.

• An error is encountered writing to the audit log file.

• The minimum free space (as specified by limit), has been reached.

Return Values

The auditsvc() function returns only on an error.

Errors

The auditsvc() function will fail if:

EAGAIN

The descriptor referred to a stream, was marked for System V-style non-blocking I/O, and no data could be written immediately.

EBADF

The fd argument is not a valid descriptor open for writing.

EBUSY

A second process attempted to perform this call.

EFBIG

An attempt was made to write a file that exceeds the process's file size limit or the maximum file size.

EINTR

The call is forced to terminate prematurely due to the arrival of a signal whose SV_INTERRUPT bit in sv_flags is set (see sigvec(3UCB)). The signal(3C) function sets this bit for any signal it catches.

EINVAL

Auditing is disabled (see auditon(2)), or the fd argument does not refer to a file of an appropriate type (regular files are always appropriate.)

EIO

An I/O error occurred while reading from or writing to the file system.

ENOSPC

The user's quota of disk blocks on the file system containing the file has been exhausted; audit filesystem space is below the specified limit; or there is no free space remaining on the file system containing the file.

ENXIO

A hangup occurred on the stream being written to.

EPERM

The {PRIV_SYS_AUDIT} privilege is not asserted in the effective set of the calling process.

EWOULDBLOCK

The file was marked for 4.2 BSD-style non-blocking I/O, and no data could be written immediately.

Usage

Only processes with appropriate privileges can execute this call successfully.

Attributes

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

See Also

auditd(1M), bsmconv(1M), audit(2), auditon(2), sigvec(3UCB), audit.log(4), attributes(5), privileges(5)

Notes

The functionality described on this manual page is internal to auditd(1M) and might not be supported in a future release.

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