1.\" 2.\" Copyright (c) 2020 M Warner Losh 3.\" 4.\" This program is free software. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 16.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" 26.\" $FreeBSD$ 27.\" 28.Dd September 22, 2020 29.Dt DEVCTL_PROCESS_RUNNING 9 30.Os 31.Sh NAME 32.Nm devctl_process_running 33.Nd Returns true when devctl has a consumer process running 34.Sh SYNOPSIS 35.In sys/devctl.h 36.Ft bool 37.Fn devctl_process_running "void" 38.Sh DESCRIPTION 39The 40.Nm 41call returns 42.Vt true 43when a process has the devctl device open for 44reading, and 45.Vt false 46otherwise. 47One can assume from this that the default 48.Xr devd 8 49or similar is running when 50.Vt true 51is returned. 52Some subsystems will send a message and allow userland to do something 53before proceeding with a default action if there's a timeout. 54This call allows those subsystems to do the default action right away 55when no process is running. 56.Sh SEE ALSO 57.Xr devd 8 58.Sh AUTHORS 59This manual page was written by 60.An M. Warner Losh 61