#!/bin/sh
#-
# Copyright (c) 2013 Dag-Erling Smørgrav
# All rights reserved.
#
# 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.
#
# $FreeBSD$
#
set -e
USERLAND_VERSION="@@REVISION@@-@@BRANCH@@"
: ${ROOT:=}
: ${LOADER_DIR:=$ROOT/boot}
: ${LOADER_CONF_FILES:=$LOADER_DIR/defaults/loader.conf $LOADER_DIR/loader.conf $LOADER_DIR/loader.conf.local}
LOADER_RE1='^\([A-Z_a-z][0-9A-Z_a-z]*=[-./0-9A-Z_a-z]\{1,\}\).*$'
LOADER_RE2='^\([A-Z_a-z][0-9A-Z_a-z]*="[-./0-9A-Z_a-z]\{1,\}"\).*$'
KERNEL_RE='^@@TYPE@@ \([-.0-9A-Za-z]\{1,\}\) .*$'
progname=${0##*/}
#
# Print an error message and exit.
#
error() {
echo "$progname: $*" >&2
exit 1
}
#
# Try to get the name of the installed kernel from loader.conf and
# return the full path. If loader.conf does not exist or we could not
# read it, return the path to the default kernel.
#
kernel_file() {
eval $(sed -n "s/$LOADER_RE1/\\1;/p; s/$LOADER_RE2/\\1;/p" \
$LOADER_CONF_FILES 2>/dev/null)
echo "$LOADER_DIR/${kernel:-kernel}/${bootfile:-kernel}"
}
#
# Extract the kernel version from the installed kernel.
#
kernel_version() {
kernfile=$(kernel_file)
if [ ! -f "$kernfile" -o ! -r "$kernfile" ] ; then
error "unable to locate kernel"
fi
what -qs "$kernfile" | sed -n "s/$KERNEL_RE/\\1/p"
}
#
# Print the version of the currently running kernel.
#
running_version() {
sysctl -n kern.osrelease
}
#
# Print the hardcoded userland version.
#
userland_version() {
echo $USERLAND_VERSION
}
#
# Print a usage string and exit.
#
usage() {
echo "usage: $progname [-kru]" >&2
exit 1
}
#
# Main program.
#
main() {
# parse command-line arguments
while getopts "kru" option ; do
case $option in
k)
opt_k=1
;;
r)
opt_r=1
;;
u)
opt_u=1
;;
*)
usage
;;
esac
done
if [ $OPTIND -le $# ] ; then
usage
fi
# default is -u
if [ $((opt_k + opt_r + opt_u)) -eq 0 ] ; then
opt_u=1
fi
# print installed kernel version
if [ $opt_k ] ; then
kernel_version
fi
# print running kernel version
if [ $opt_r ] ; then
running_version
fi
# print userland version
if [ $opt_u ] ; then
userland_version
fi
}
main "$@"
