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Rudimentary support for systemd services

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Signed-off-by: fbt <fbt@fleshless.org>
This commit is contained in:
Jack L. Frost 2018-01-07 08:36:39 +03:00
parent 903d3e9888
commit 234ee56bed
1 changed files with 60 additions and 19 deletions
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@ -200,6 +200,30 @@ result() {
printf '%s\n' "${msgs[$rc]}" printf '%s\n' "${msgs[$rc]}"
}; readonly -f result }; readonly -f result
read_systemd_service() {
declare section key value
while read -r line; do
[[ $line =~ ^\[(.+)\] ]] && section=${BASH_REMATCH[1],,}
[[ $line =~ ^([^=]+)=(.+) ]] && {
key=${BASH_REMATCH[1],,}
value=${BASH_REMATCH[2]}
}
case $section in
(service)
case $key in
(pidfile) service_pidfile=$value;;
(execstart) eval "service_command=( $value )";;
(execstop) eval "service_command_stop=( $value )";;
(execreload) eval "service_command_reload=( $value )";;
(restart) [[ $value == 'always' ]] && service_respawn=1;;
esac
;;
esac
done < "$1"
}
# Overloadable functions # Overloadable functions
## Start the service, write down the svc pid ## Start the service, write down the svc pid
start() { start() {
@ -241,12 +265,7 @@ start() {
## Usually just sends HUP ## Usually just sends HUP
reload() { reload() {
(( service_running )) || return 3 (( service_running )) || return 3
"${service_command_reload[@]}"
if (( service_managed )); then
kill -n 1 "$service_pid"
else
kill -n "$service_reload_signal" "$service_pid"
fi
} }
## Stop the service ## Stop the service
@ -262,7 +281,8 @@ stop() {
else else
(( service_running )) || return 3 (( service_running )) || return 3
nullexec kill -n "$service_stop_signal" "$service_pid" || return 1 "${service_command_stop[@]}" || return 1
pid_wait "$service_pid" || return 5 pid_wait "$service_pid" || return 5
> "$service_stopped_flag" > "$service_stopped_flag"
@ -404,26 +424,43 @@ main() {
break break
} }
done done
# Search for a systemd service too
for i in {/etc/systemd,/run/systemd,/lib/systemd,/usr/lib/systemd}/system/$1.service; do
[[ -f "$i" ]] && {
service_name=$1
service_systemd=1
service_config=$i
read_systemd_service "$i"
break
}
done
fi fi
# Die if there is no such file # Die if there is no service config file
[[ "$service_config" ]] || die 19 "Service not found: $1" [[ "$service_config" ]] || die 19 "Service not found: $1"
# Service name is the basename
service_name="${1##*/}"
# Semi-hardcoded stuff # Semi-hardcoded stuff
svc_pidfile="$rundir/$service_name.pid" svc_pidfile="$rundir/$service_name.pid"
# Get the service defaults # We can handle other people's service configs, poorly
for p in "${cfg_path[@]/%//$service_name}"; do if (( service_systemd )); then
[[ -f "$p" ]] && { # I'm pretty sure we'll need this
source "$p" || die 5 "Failed to read service defaults: $p" :
} else
done # Service name is the basename
service_name="${1##*/}"
# Get the service config # Get the service defaults
source -- "$service_config" "${@:3}" || die 7 "Failed to read the service config: $service_config" for p in "${cfg_path[@]/%//$service_name}"; do
[[ -f "$p" ]] && {
source "$p" || die 5 "Failed to read service defaults: $p"
}
done
# Get the service config
source -- "$service_config" "${@:3}" || die 7 "Failed to read the service config: $service_config"
fi
# Legacy # Legacy
[[ "$service_args" ]] && service_command=( "${service_command[@]}" "${service_args[@]}" ) [[ "$service_args" ]] && service_command=( "${service_command[@]}" "${service_args[@]}" )
@ -460,6 +497,10 @@ main() {
fi fi
fi fi
# The stop and reload commands need the service pid
default service_command_stop kill -n "$service_stop_signal" "$service_pid"
default service_command_reload kill -n "$service_reload_signal" "$service_pid"
# Maybe the service is enabled? # Maybe the service is enabled?
if [[ -f "$service_enabled_flag" ]]; then if [[ -f "$service_enabled_flag" ]]; then
# Yay, it is! # Yay, it is!