216 lines
7.5 KiB
Bash
Executable File
216 lines
7.5 KiB
Bash
Executable File
#!/bin/bash
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# set -x
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source ./general_utils
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source ./log_helpers
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source ./git_helpers
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# source ./update_helpers.sh
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# source ./opkg_helpers.sh
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source ./update_psa_helpers
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source ./read_config
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###############################################################################
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# update_psa
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#
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# Implementing the UpdateController (see below). UpdateController is waiting
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# for an external trigger by the DeviceController (DC). The trigger is sent via
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# an UNIX-pipe (=fifo). When DC triggers UpdateController, it has to check if
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# an update is possible, i.e. is has to lock the PSA for the update procedure.
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# UpdateController will send back the update-result to DeviceController
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# which unlocks the PSA to return to nomal operation.
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#
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# If UpdateController has been triggered, it checks out a predefined git-
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# repository. As a sanity check it makes sure that there are some changes in
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# the repository. In case there are no changes, it issues an error message
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# to DC and returns to its wait-state.
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#
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# Otherwise it checks if the changed files are correct (using md5) and if
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# the new files are valid for the PSA. If there is some problem, it issues an
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# error message to DC, reverts the git-repository to its previous state and
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# returns to its wait-state.
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#
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# Otherwise it makes a backup of the current state of the PSA, and if there
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# are opkg-packages to install it runs a dry installation process using opkg.
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# In case of error, it issues an error message to DC, deletes the backup,
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# reverts # the git-repository to its previous state and returns to its
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# wait-state.
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#
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# Otherwise, it copies all new files to their target locations and in case
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# of opkg-packages, it installs the packages.
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#
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# In case of error it restores the previous state using the backup and
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# reinstalls the previous opkg-package(s). It issues an error message to
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# DC and returns to its wait-state.
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#
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# Otherwise the update went well, and it does some cleanup, sends a success
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# message to DC and returns to its wait-state.
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#
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###############################################################################
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#
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# UPDATE PROCEDURE
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#
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###############################################################################
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update() {
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local try_update_count=0
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local func="${FUNCNAME[0]}"
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# read config parameters
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# read_config
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log_debug "$func:${LINENO}: fetch/merge updates..."
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# Fetch new updates (using git)
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while :
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do
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local repository_is_already_up_to_date=""
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if ! fetch_customer_updates repository_is_already_up_to_date; then
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if [ "$repository_is_already_up_to_date" = "yes" ]; then
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log_error "$func:${LINENO}: $customer_id is up-to-date"\
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"-> no files to update -> no psa update"
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exit 1
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fi
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try_updates_count=$((try_updates_count+1))
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if [[ "$try_updates_count" -eq 5 ]]; then
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log_error "$func:${LINENO}: fetch/merging failed" ; exit 1
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fi
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sleep 60s
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else
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# Fetched updates successfully
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try_updates_count=0
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break
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fi
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done
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# TODO: backup implementieren
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# Backup before any updates in case some previous test was wrong
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if ! backup_previous_version; then
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log_error "$func:${LINENO}: backup failed"
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revert_customer_repository ; exit 1
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fi
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local files=$(changed_file_names)
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local system_files=$(filter_system_files "$files") # conf/ini-files
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# check if *.conf and/or *.ini-files have to md5-sum as denoted
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# in update.conf
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if ! check_md5_for_changed_conf_and_ini_files "$system_files" ; then
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log_error "$func:${LINENO}: new customer files wrong"
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revert_customer_repository ; exit 1
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fi
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# copy *.conf and/or *.ini-files to their corresponding system-directories
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if ! copy $system_files; then
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log_error "$func:${LINENO}: copy operation failed"
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revert_customer_repository ; exit 1
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fi
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# check if the opkg-command-file has been changed during 'git pull'
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if grep -qE ".*opkg_commands.*?" <<< $files; then
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# read opkg_cmds: each line respresents an opkg-command
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readarray opkg_commands < <(cat $opkg_cmds_file)
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for opkg_c in "${opkg_commands[@]}"; do
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if grep -qE "^\s*[#]+.*$" <<< $opkg_c; then
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continue # found comment line
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fi
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# package manipulation commands without package:
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local cwp="update|upgrade|clean"
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# informational commands without package:
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cwp="${cwp}|list|list-installed|list-upgradable"
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if grep -qE "^.*\s+($cwp)\s+.*$" <<< $opkg_c; then
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local p=$(printf '%s' "$opkg_c" | awk '{ print $NF }')
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local opkg_output=()
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if ! exec_opkg_info "$p" opkg_output; then
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log_error "$func:${LINENO}: opkg info $opkg_c failed"
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revert_customer_repository ; exit 1
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fi
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if ! check_md5_for_opkg_packages opkg_output; then
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log_error "$func:${LINENO}: "\
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"wrong md5sum for opkg packages"
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revert_customer_repository ; exit 1
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fi
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fi
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# perform a dry-run and check if everything might work as expected.
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if ! exec_opkg_noaction $opkg_c; then
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log_error "$func:${LINENO}: "\
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"opkg --noaction $opkg_c failed"
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fi
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# Actually execute the opkg command
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if ! exec_opkg $opkg_c; then
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log_error "$func:${LINENO}: exec_opkg $opkg_c failed"
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fallback_to_previous_version
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revert_customer_repository ; exit 1
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fi
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done
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else
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log_info "$func:${LINENO}: no opkg commnds to execute"
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fi
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# Cleanup.
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if ! cleanup_previous_version; then
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log_error "$func:${LINENO}: cleanup_previous_version failed"
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fi
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log_info "$func:${LINENO}: success"
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exit 0
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}
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###############################################################################
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if [ -z $IFS ]; then
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IFS=$'\n'
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fi
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readonly PROGRAM=`basename $0`
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readonly VERSION="0.8.0"
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config_filename=""
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while test $# -gt 0; do
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case $1 in
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--file | --fil | --fi | --f | -file | -fil | -fi | -f )
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__conf_file=yes
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;;
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--help | -hel | --he | --h | '--?' | -help | -hel | -he | -h | '-?' )
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usage_and_exit 0
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;;
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--version | --versio | --versi | --vers | --ver | --ve | --v | \
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-version | -versio | -versi | -vers | -ver | -ve | -v )
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version
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;;
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--dbg | --db | --d | -dbg | -db | -d )
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set_dbg_level $DEBUG
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;;
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-*)
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error "Unrecognized option: $1"
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;;
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*)
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if [ "$__conf_file" = "yes" ]; then
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config_filename="$1"
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__conf_file=""
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else
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error "Unrecognized parameter string: $1"
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fi
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break
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;;
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esac
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shift
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done
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if ! [ -z "$config_filename" ]; then
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if read_config "$config_filename" ; then
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# set -x
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if clone_customer_repository $customer_repository_path ; then
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update
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fi
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fi
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else
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error "config-file missing"
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fi
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