replaces UpdateController.sh

This commit is contained in:
Gerhard Hoffmann 2022-06-03 20:42:26 +02:00
parent fd40ba31a1
commit 086a2c1585

163
update_psa Executable file
View File

@ -0,0 +1,163 @@
#!/bin/bash
# set -x
source ./log_helpers
source ./git_helpers
# source ./update_helpers.sh
# source ./opkg_helpers.sh
source ./update_psa_helpers
source ./read_config
###############################################################################
# update_psa
#
# Implementing the UpdateController (see below). UpdateController is waiting
# for an external trigger by the DeviceController (DC). The trigger is sent via
# an UNIX-pipe (=fifo). When DC triggers UpdateController, it has to check if
# an update is possible, i.e. is has to lock the PSA for the update procedure.
# UpdateController will send back the update-result to DeviceController
# which unlocks the PSA to return to nomal operation.
#
# If UpdateController has been triggered, it checks out a predefined git-
# repository. As a sanity check it makes sure that there are some changes in
# the repository. In case there are no changes, it issues an error message
# to DC and returns to its wait-state.
#
# Otherwise it checks if the changed files are correct (using md5) and if
# the new files are valid for the PSA. If there is some problem, it issues an
# error message to DC, reverts the git-repository to its previous state and
# returns to its wait-state.
#
# Otherwise it makes a backup of the current state of the PSA, and if there
# are opkg-packages to install it runs a dry installation process using opkg.
# In case of error, it issues an error message to DC, deletes the backup,
# reverts # the git-repository to its previous state and returns to its
# wait-state.
#
# Otherwise, it copies all new files to their target locations and in case
# of opkg-packages, it installs the packages.
#
# In case of error it restores the previous state using the backup and
# reinstalls the previous opkg-package(s). It issues an error message to
# DC and returns to its wait-state.
#
# Otherwise the update went well, and it does some cleanup, sends a success
# message to DC and returns to its wait-state.
#
###############################################################################
#
# UPDATE PROCEDURE
#
###############################################################################
update() {
local try_update_count=0
local func="${FUNCNAME[0]}"
# read config parameters
# read_config
log_debug "$func:${LINENO}: fetch/merge updates..."
# Fetch new updates (using git)
while :
do
local repository_is_already_up_to_date=""
if ! fetch_customer_updates repository_is_already_up_to_date; then
if [ "$repository_is_already_up_to_date" = "yes" ]; then
log_error "$func:${LINENO}: $customer_id is up-to-date"\
"-> no files to update -> no psa update"
exit 1
fi
try_updates_count=$((try_updates_count+1))
if [[ "$try_updates_count" -eq 5 ]]; then
log_error "$func:${LINENO}: fetch/merging failed" ; exit 1
fi
sleep 60s
else
# Fetched updates successfully
try_updates_count=0
break
fi
done
# Backup before any updates in case some previous test was wrong
if ! backup_previous_version; then
log_error "$func:${LINENO}: backup failed"
revert_customer_repository ; exit 1
fi
files=$(changed_file_names)
if ! check_md5_for_changed_customer_files $files ; then
log_error "$func:${LINENO}: new customer files wrong"
revert_customer_repository ; exit 1
fi
if grep -qE ".*opkg_commands.*?" <<< $files; then
# read opkg_cmds: each line respresents an opkg-command
readarray opkg_commands < <(cat $opkg_cmds_file)
for opkg_command in "${opkg_commands[@]}"; do
if grep -qE "^\s*[#]+.*?$" <<< $opkg_command; then
continue # found comment line
fi
# FIXME: sollte nicht gebraucht werden
opkg_command=${opkg_command//[$'\r\n\t']/ }
local package=$(printf '%s' "$opkg_command" | awk '{ print $NF }')
local opkg_output=()
if ! exec_opkg_info "$package" opkg_output; then
log_error "$func:${LINENO}: opkg --noaction $opkg_command failed"
revert_customer_repository ; exit 1
fi
# FIXME: sollte am anfang so gesetzt werden
SAVEIFS=$IFS
IFS=$'\n'
if ! check_md5_for_opkg_packages opkg_output; then
log_error "$func:${LINENO}: wrong md5sum for some opkg packages"
revert_customer_repository ; exit 1
fi
IFS=$SAVEIFS
# perform a dry-run and check if everything might work as expected.
# Actually execute the opkg command
if ! exec_opkg $opkg_command; then
log_error "$func:${LINENO}: do_update failed"
fallback_to_previous_version
revert_customer_repository ; exit 1
fi
done
else
log_info "$func:${LINENO}: no opkg commnds to execute"
fi
# Cleanup.
if ! cleanup_previous_version; then
log_error "$func:${LINENO}: cleanup_previous_version failed"
fi
log_info "$func:${LINENO}: success"
exit 0
}
###############################################################################
if [ $# -ne 1 ] ; then
echo "Usage: $0 filename"
exit 1
else
# if [ -z $IFS ]; then
# IFS=$'\n'
# fi
if read_config "$1" ; then
# set -x
if clone_customer_repository $repository_path ; then
update
fi
fi
fi