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