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.\"
.\" Copyright (c) 2017 John Baldwin <jhb@FreeBSD.org>
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd November 24, 2017
.Dt sysdecode_kevent 3
.Os
.Sh NAME
.Nm sysdecode_kevent ,
.Nm sysdecode_kevent_fflags ,
.Nm sysdecode_kevent_filter ,
.Nm sysdecode_kevent_flags
.Nd output description of kevent structure fields
.Sh LIBRARY
.Lb libsysdecode
.Sh SYNOPSIS
.In sysdecode.h
.Ft void
.Fn sysdecode_kevent_fflags "FILE *fp" "short filter" "int fflags" "int base"
.Ft bool
.Fn sysdecode_kevent_flags "FILE *fp" "int flags" "int *rem"
.Ft const char *
.Fn sysdecode_kevent_filter "int filter"
.Sh DESCRIPTION
These functions provide text descriptions of
.Vt struct kevent
fields.
.Pp
The
.Fn sysdecode_kevent_fflags
function outputs a text description of the
.Fa fflags
member of a
.Vt struct kevent
to the stream
.Fa fp .
For the
.Dv EVFILT_READ ,
.Dv EVFILT_WRITE ,
.Dv EVFILT_VNODE ,
.Dv EVFILT_PROC ,
.Dv EVFILT_PROCDESC ,
.Dv EVFILT_TIMER ,
and
.Dv EVFILT_USER
filters,
.Fn sysdecode_kevent_fflags
outputs a bitmask of filter-specific
.Dv NOTE_*
flags as documented in
.Xr kevent 2 .
For other values of
.Fa filter ,
the value of
.Fa fflags
is output in the indicated
.Fa base
.Pq one of 8, 10, or 16 .
.Pp
The
.Fn sysdecode_kevent_filter
function returns a text description of the
.Fa filter
member of a
.Vt struct kevent .
.Dv NULL
is returned if the
.Fa filter
value is unknown.
.Pp
The
.Fn sysdecode_kevent_flags
function outputs a text description of the
.Fa flags
member of a
.Vt struct kevent
to the stream
.Fa fp .
This function uses the same calling convention and formatting as the other
functions described in
.Xr sysdecode_mask 3 .
.Sh RETURN VALUES
The
.Nm sysdecode_kevent_filter
function returns the name of a filter or
.Dv NULL if the filter value is unknown.
.Pp
The
.Nm sysdecode_kevent_flags
function returns
.Dv true
if any flags in the
.Fa flags
field were decoded and
.Dv false
if no flags were decoded.
.Sh SEE ALSO
.Xr sysdecode 3 ,
.Xr sysdecode_enum 3 ,
.Xr sysdecode_mask 3
|
