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.\"
.\" Copyright (c) 2016 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_fcntl_arg 3
.Os
.Sh NAME
.Nm sysdecode_fcntl_arg ,
.Nm sysdecode_fcntl_arg_p
.Nd output description of fcntl argument
.Sh LIBRARY
.Lb libsysdecode
.Sh SYNOPSIS
.In sysdecode.h
.Ft void
.Fn sysdecode_fcntl_arg "FILE *fp" "int cmd" "uintptr_t arg" "int base"
.Ft bool
.Fn sysdecode_fcntl_arg_p "int cmd"
.Sh DESCRIPTION
The
.Fn sysdecode_fcntl_arg
function outputs a text description of the optional
.Fa arg
argument to
.Xr fcntl 2
to the stream
.Fa fp .
The type and format of
.Fa arg
are determined by
.Fa cmd :
.Bl -column ".Dv F_SETLKW" "Vt struct flock *"
.It Sy Command Ta Fa arg Sy Type Ta Sy Output Format
.It
.It Dv F_SETFD Ta Vt int Ta
.Dq FD_CLOEXEC
or the value of
.Fa arg
in the indicated
.Fa base
.Pq one of 8, 10, or 16 .
.It
.It Dv F_SETFL Ta Vt int Ta
File flags as output by
.Xr sysdecode_fcntl_fileflags 3
with any unknown or remaining bits output in hexadecimal.
.It
.It Dv F_GETLK Ta Vt struct flock * Ta
.It Dv F_SETLK Ta Vt struct flock * Ta
.It Dv F_SETLKW Ta Vt struct flock * Ta
The value of
.Fa arg
using the
.Dq %p
conversion specification.
.It
.It Others Ta Vt int Ta
The value of
.Fa arg
in the indicated
.Fa base
.Pq one of 8, 10, or 16 .
.El
.Pp
The
.Fn sysdecode_fcntl_arg_p
function can be used to determine if a
.Xr fcntl 2
command uses the optional third argument to
.Xr fcntl 2 .
The function returns
.Dv true
if
.Fa cmd
accepts a third argument to
.Xr fcntl 2
and
.Dv false
if it does not.
.Sh RETURN VALUES
The
.Nm sysdecode_fcntl_arg_p
function returns
.Dv true
if
.Fa cmd
accepts a third argument to
.Xr fcntl 2
and
.Dv false
if it does not.
.Sh SEE ALSO
.Xr sysdecode 3 ,
.Xr sysdecode_fcntl_cmd 3 ,
.Xr sysdecode_fcntl_fileflags 3
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