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