1.\" 2.\" Copyright (c) 2017 Netflix, Inc 3.\" 4.\" All rights reserved. 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 AUTHORS ``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 AUTHORS 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 February 16, 2018 29.Dt DEVMATCH 8 30.Os 31.Sh NAME 32.Nm devmatch 33.Nd print information about unattached devices 34.Sh SYNOPSIS 35.Nm 36.Op Fl adhpuv 37.Op Fl -all 38.Op Fl -dump 39.Op Fl -hints Ar file 40.Op Fl -nomatch Ar event 41.Op Fl -unbound 42.Op Fl -verbose 43.Sh DESCRIPTION 44The 45.Nm 46utility, without any arguments, prints all the kernel modules it has 47found for all the unattached, enabled devices in the system. 48.Bl -tag -width 20m 49.It Fl a Fl -all 50Include all devices, not just the ones that are unattached. 51.It Fl d Fl -dump 52Produce a human readable dump of the 53.Pa linker.hints 54file. 55.It Fl h Fl -hints Ar file 56Use the named 57.Ar file 58instead of 59.Pa linker.hints 60guessed from the current module load path. 61.It Fl p Fl -nomatch Ar event 62Parse and use a standard NOMATCH event from 63.Xr devd 8 64for matching instead of searching the device tree. 65.It Fl u Fl -unbound 66Attempt to produce a list of those drivers with PNP info whose driver 67tables with that PNP info can't be found. 68.It Fl v Fl -verbose 69Produce more verbose output. 70.El 71.Sh SEE ALSO 72.Xr devinfo 8 , 73.Xr MODULE_PNP_INFO 9 74.Sh BUGS 75The kernel has hints in it, but we exclude it from the list of modules 76to suggest for unmatched devices. 77We exclude it when suggesting drivers, but include it when looking for 78unbound devices or producing a full dump of 79.Pa linker.hints . 80This can be confusing. 81.Pp 82Some modules are hard links in 83.Pa /boot/kernel 84and will be reported twice. 85.Pp 86The PNP string's attributes are evaluated once per PNP entry on that 87bus rather than once. 88.Pp 89The term PNP is overloaded in FreeBSD. 90It means, generically, the identifying data the bus provides about a 91device. 92While this include old ISA PNP identifiers, it also includes the 93logical equivalent in USB, PCI, and others. 94.Pp 95Many drivers currently lack proper PNP table decorations and need to 96be updated. 97.Sh AUTHORS 98.An Warner Losh Aq Mt imp@FreeBSD.org 99