125 lines
3.8 KiB
Groff
125 lines
3.8 KiB
Groff
.\"-
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.\" Copyright (c) 2013 Dag-Erling Smørgrav
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.\" All rights reserved.
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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 14, 2017
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.Dt FREEBSD-VERSION 1
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.Os
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.Sh NAME
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.Nm freebsd-version
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.Nd print the version and patch level of the installed system
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.Sh SYNOPSIS
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.Nm
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.Op Fl kru
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.Sh DESCRIPTION
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The
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.Nm
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utility makes a best effort to determine the version and patch level
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of the installed kernel and / or userland.
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.Pp
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The following options are available:
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.Bl -tag -width Fl
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.It Fl k
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Print the version and patch level of the installed kernel.
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Unlike
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.Xr uname 1 ,
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if a new kernel has been installed but the system has not yet
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rebooted,
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.Nm
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will print the version and patch level of the new kernel.
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.It Fl r
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Print the version and patch level of the running kernel.
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Unlike
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.Xr uname 1 ,
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this is unaffected by environment variables.
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.It Fl u
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Print the version and patch level of the installed userland.
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These are hardcoded into
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.Nm
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during the build.
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.El
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.Pp
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If several of the above options are specified,
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.Nm
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will print the installed kernel version first, then the running kernel
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version, and finally the userland version, on separate lines.
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If neither is specified, it will print the userland version only.
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.Sh IMPLEMENTATION NOTES
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The
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.Nm
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utility should provide the correct answer in the vast majority of
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cases, including on systems kept up-to-date using
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.Xr freebsd-update 8 ,
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which does not update the kernel version unless the kernel itself was
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affected by the latest patch.
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.Pp
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To determine the name (and hence the location) of a custom kernel, the
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.Nm
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utility will attempt to parse
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.Pa /boot/defaults/loader.conf
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and
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.Pa /boot/loader.conf ,
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looking for definitions of the
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.Va kernel
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and
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.Va bootfile
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variables, both with a default value of
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.Dq kernel .
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It may however fail to locate the correct kernel if either or both of
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these variables are defined in a non-standard location, such as in
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.Pa /boot/loader.rc .
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.Sh ENVIRONMENT
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.Bl -tag -width ROOT
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.It Ev ROOT
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Path to the root of the filesystem in which to look for
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.Pa loader.conf
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and the kernel.
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.El
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.Sh EXAMPLES
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To determine the version of the currently running userland:
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.Bd -literal -offset indent
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/bin/freebsd-version -u
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.Ed
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.Pp
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To inspect a system being repaired using a live CD:
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.Bd -literal -offset indent
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mount -rt ufs /dev/ada0p2 /mnt
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env ROOT=/mnt /mnt/bin/freebsd-version -ku
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.Ed
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.Sh SEE ALSO
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.Xr uname 1 ,
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.Xr loader.conf 5
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.Sh HISTORY
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The
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.Nm
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command appeared in
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.Fx 10.0 .
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.Sh AUTHORS
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The
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.Nm
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utility and this manual page were written by
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.An Dag-Erling Sm\(/orgrav Aq Mt des@FreeBSD.org .
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