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# RaspMatic update addon
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#
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# Copyright (C) 2017 Jan Schneider <oss@janschneider.net>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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namespace eval rmu {
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variable addon_dir "/usr/local/addons/raspmatic-update"
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variable tmp_dir "/usr/local/addons/raspmatic-update/tmp"
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variable mnt_cur "/usr/local/addons/raspmatic-update/mnt_cur"
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variable mnt_new "/usr/local/addons/raspmatic-update/mnt_new"
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variable sys_dev "/dev/mmcblk0"
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variable loop_dev "/dev/loop7"
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}
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proc ::rmu::write_log {str} {
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puts stderr $str
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#set fd [open "/tmp/rmu.log" "a"]
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#puts $fd $str
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#close $fd
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}
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proc ::rmu::version {} {
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variable version_file
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set fp [open "${addon_dir}/VERSION" r]
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set data [read $fp]
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close $fp
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return [string trim $data]
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}
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proc ::rmu::get_partion_start_and_size {device partition} {
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set data [exec parted $device unit B print]
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foreach d [split $data "\n"] {
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regexp {^\s*(\d)\s+(\d+)B\s+(\d+)B\s+(\d+)B.*} $d match num start end size
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if { [info exists num] && $num == $partition } {
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return [list $start $size]
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}
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}
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return [list -1 -1]
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}
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proc ::rmu::mount_image_partition {image partition mountpoint} {
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variable loop_dev
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variable sys_dev
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write_log "Mounting parition ${partition} of image ${image}."
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set p [get_partion_start_and_size $sys_dev $partition]
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file mkdir $mountpoint
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catch {exec umount "${mountpoint}"}
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catch {exec losetup -d $loop_dev}
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exec losetup -o [lindex $p 0] $loop_dev "${image}"
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exec mount $loop_dev -o ro "${mountpoint}"
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}
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proc ::rmu::mount_system_partition {partition_or_filesystem mountpoint} {
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if {$partition_or_filesystem == 1} {
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set partition_or_filesystem "/boot"
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} elseif {$partition_or_filesystem == 2} {
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set partition_or_filesystem "/"
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} elseif {$partition_or_filesystem == 3} {
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set partition_or_filesystem "/usr/local"
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}
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write_log "Remounting filesystem ${partition_or_filesystem} (rw)."
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file mkdir $mountpoint
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catch {exec umount "${mountpoint}"}
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exec mount -o bind $partition_or_filesystem "${mountpoint}"
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exec mount -o remount,rw "${mountpoint}"
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}
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proc ::rmu::umount {device_or_mountpoint} {
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exec umount "${device_or_mountpoint}"
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}
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proc ::rmu::get_filesystem_size_and_usage {device_or_mountpoint} {
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set data [exec df]
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foreach d [split $data "\n"] {
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regexp {^(\S+)\s+\d+\s+(\d+)\s+(\d+)\s+\d+%\s(\S+)\s*$} $d match device used available mountpoint
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if { [info exists device] } {
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if {$device == $device_or_mountpoint || $mountpoint == $device_or_mountpoint} {
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return [list [expr {$used*1024+$available*1024}] [expr {$used*1024}]]
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}
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}
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}
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return [list -1 -1]
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}
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proc ::rmu::check_sizes {image} {
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variable mnt_new
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variable mnt_cur
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write_log "Checking size of filesystems."
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file mkdir $mnt_new
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file mkdir $mnt_cur
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foreach partition [list 1 2] {
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mount_image_partition $image $partition $mnt_new
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mount_system_partition $partition $mnt_cur
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set su_new [get_filesystem_size_and_usage $mnt_new]
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set new_used [lindex $su_new 1]
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set su_cur [get_filesystem_size_and_usage $mnt_cur]
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set cur_size [lindex $su_cur 0]
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write_log "Current filesystem (${partition}) size: ${cur_size}, new filesystem used bytes: ${new_used}."
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umount $mnt_new
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umount $mnt_cur
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# Minimum free space 100 MB
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if { [expr {$new_used+100*1024*1024}] >= $cur_size } {
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error "Current filesystem of partition $partition (${cur_size} bytes) not big enough (new usage: ${new_used} bytes)."
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}
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}
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}
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proc ::rmu::update_filesystems {image} {
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variable mnt_new
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variable mnt_cur
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write_log "Updating filesystems."
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file mkdir $mnt_new
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file mkdir $mnt_cur
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foreach partition [list 1 2] {
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write_log "Updating partition ${partition}."
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mount_image_partition $image $partition $mnt_new
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mount_system_partition $partition $mnt_cur
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write_log "Rsyncing filesystem."
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set data [exec rsync --progress --archive --delete "${mnt_new}/" "${mnt_cur}"]
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umount $mnt_new
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umount $mnt_cur
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}
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}
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proc ::rmu::get_latest_firmware_download_url {} {
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set data [exec wget "https://github.com/jens-maus/RaspberryMatic/releases/latest" --no-check-certificate -q -O-]
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foreach d [split $data "\n"] {
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set href ""
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regexp {<\s*a\s+href\s*=\s*"([^"]+/releases/download/[^"]+.zip)"} $d match href
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if { [info exists href] && $href != ""} {
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return "https://github.com${href}"
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}
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}
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error "Failed to get latest firmware download url"
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}
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proc ::rmu::download_latest_firmware {} {
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variable tmp_dir
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set download_url [get_latest_firmware_download_url]
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write_log "Downloading latest firmware from ${download_url}."
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regexp {/([^/]+)$} $download_url match archive_file
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set archive_file "${tmp_dir}/${archive_file}"
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file mkdir $tmp_dir
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exec wget "${download_url}" --no-check-certificate -q --output-document=$archive_file
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return $archive_file
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}
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proc ::rmu::get_latest_firmware_version {} {
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set download_url [get_latest_firmware_download_url]
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regexp {\-([\d\.]+).zip$} $download_url match latest_version
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return $latest_version
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}
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proc ::rmu::get_current_firmware_version {} {
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set fp [open "/boot/VERSION" r]
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set data [read $fp]
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close $fp
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regexp {\s*VERSION\s*=s*([\d\.]+)\s*$} $data match current_version
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return $current_version
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}
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proc ::rmu::is_firmware_up_to_date {} {
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set latest_version [get_latest_firmware_version]
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write_log "Latest firmware version: ${latest_version}"
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set current_version [get_current_firmware_version]
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write_log "Current firmware version: ${current_version}"
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if {[string compare $current_version $latest_version] >= 0} {
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return 1
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}
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return 0
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}
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rmu::download_latest_firmware
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#puts [rmu::is_firmware_up_to_date]
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#puts [rmu::get_latest_firmware_download_url]
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#rmu::check_sizes "/usr/local/addons/raspmatic-update/tmp/RaspberryMatic-2.27.7.20170316.img"
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#set res [rmu::get_partion_start_and_size "/dev/mmcblk0" 1]
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#rmu::mount_image_partition "/usr/local/addons/raspmatic-update/tmp/RaspberryMatic-2.27.7.20170316.img" 1 $rmu::mnt_new
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#rmu::umount $rmu::mnt_new
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#rmu::mount_system_partition "/boot" $rmu::mnt_cur
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#rmu::umount $rmu::mnt_cur
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