282 lines
7.2 KiB
Bash
Executable File
282 lines
7.2 KiB
Bash
Executable File
#!/bin/bash
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function get_unit_file(){
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local UNIT=$1
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for DIR in ${UNIT_PATHS[@]} ; do
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if [ -f "${DIR}${UNIT}" ] ; then
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echo "${DIR}${UNIT}"
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break
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fi
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done
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}
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function read_option(){
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local OPTION="$1"
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local UNIT_FILE="$2"
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local UNIT_INSTANCE="$3"
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local UNIT=`basename $UNIT_FILE`
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local UNIT_FULL=`echo $UNIT | sed "s/@/@$UNIT_INSTANCE/"`
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VALUE="$(grep '^'$OPTION'[= ]' "$UNIT_FILE" | cut -d '=' -f2- | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')"
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VALUE="`
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echo $VALUE |
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sed -e "s/%[i]/$UNIT_INSTANCE/g" \
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-e "s/%[I]/\"$UNIT_INSTANCE\"/g" \
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-e "s/%[n]/$UNIT_FULL/g" \
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-e "s/%[N]/\"$UNIT_FULL\"/g"
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`"
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# TODO: Add more options from:
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# https://www.freedesktop.org/software/systemd/man/systemd.unit.html#Specifiers
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echo $VALUE
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}
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function get_unit_wants() {
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local UNIT_FILE=$1
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local UNIT=`basename $UNIT_FILE`
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sort -u <<< `(
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# Print wants from UNIT_PATHS
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for DIR in ${UNIT_PATHS[@]} ; do
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if [ -d "${DIR}${UNIT}.wants" ] ; then
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ls -1 "${DIR}${UNIT}.wants/" | tr '\n' ' '
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fi
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done
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# Print wants from unit-file
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read_option Wants $UNIT_FILE
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)`
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}
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function action_start(){
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# Find depended services
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local UNIT_FILE=$1
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local UNIT_WANTS=(`get_unit_wants $1`)
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local UNIT_INSTANCE=$2
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# Start depended services
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for UNIT in ${UNIT_WANTS[@]}; do
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exec_action start $UNIT
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done
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# Load options
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local User=`read_option User $UNIT_FILE $UNIT_INSTANCE`
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local Type=`read_option Type $UNIT_FILE $UNIT_INSTANCE`
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local EnvironmentFile=`read_option EnvironmentFile $UNIT_FILE $UNIT_INSTANCE`
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local ExecStartPre=(`read_option ExecStartPre $UNIT_FILE $UNIT_INSTANCE`)
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local ExecStart=`read_option ExecStart $UNIT_FILE $UNIT_INSTANCE`
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local ExecStartPost=(`read_option ExecStartPost $UNIT_FILE $UNIT_INSTANCE`)
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local Restart=(`read_option Restart $UNIT_FILE $UNIT_INSTANCE`)
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local RestartSec=(`read_option RestartSec $UNIT_FILE $UNIT_INSTANCE`)
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RestartSec=${RestartSec:=5}
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[ -f "$EnvironmentFile" ] && source "$EnvironmentFile"
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# Start service
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if [ -z $Type ] || [[ "${Type,,}" == *"simple"* ]] ; then
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if [ "$Restart" == "always" ]; then
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COMMAND='nohup bash -c "while true ; do '"$ExecStart"'; sleep $RestartSec; done" &>/dev/null &'
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else
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COMMAND='nohup '"$ExecStart"' >>/dev/null 2>&1 &'
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fi
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elif [[ "${Type,,}" == *"forking"* ]] || [[ "${Type,,}" == *"oneshot"* ]] ; then
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COMMAND="$ExecStart"
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else
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>&2 echo "Unknown service type $Type"
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fi
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#[ -z $User ] || COMMAND="su $User -c \"$COMMAND\""
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while IFS=$'\n' read -a i; do
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eval $i
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done <<< "${ExecStartPre[@]}"
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eval "$COMMAND"
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while IFS=$'\n' read -a i; do
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eval $i
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done <<< "${ExecStartPost[@]}"
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}
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function action_stop(){
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# Find depended services
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local UNIT_FILE=$1
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local UNIT_WANTS=(`get_unit_wants $1`)
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local UNIT_INSTANCE=$2
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# Load options
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local User=`read_option User $UNIT_FILE $UNIT_INSTANCE`
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local Type=`read_option Type $UNIT_FILE $UNIT_INSTANCE`
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local EnvironmentFile=`read_option EnvironmentFile $UNIT_FILE $UNIT_INSTANCE`
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local ExecStopPre=(`read_option ExecStartPre $UNIT_FILE $UNIT_INSTANCE`)
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local ExecStop=`read_option ExecStop $UNIT_FILE $UNIT_INSTANCE`
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local ExecStopPost=(`read_option ExecStartPost $UNIT_FILE $UNIT_INSTANCE`)
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local ExecStart=`read_option ExecStart $UNIT_FILE $UNIT_INSTANCE`
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[ -f "$EnvironmentFile" ] && source "$EnvironmentFile"
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# Stop service
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if [ -z $ExecStop ] ; then
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COMMAND="kill -TERM \$(pgrep -f \"$ExecStart\")"
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else
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COMMAND="$ExecStop"
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fi
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#[ -z $User ] || COMMAND="su $User -c \"$COMMAND\""
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while IFS=$'\n' read -a i; do
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eval $i
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done <<< "${ExecStopPre[@]}"
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eval "$COMMAND"
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while IFS=$'\n' read -a i; do
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eval $i
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done <<< "${ExecStopPost[@]}"
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}
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function action_restart(){
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local UNIT_FILE=$1
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local UNIT_INSTANCE=$2
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action_stop $UNIT_FILE $UNIT_INSTANCE
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action_start $UNIT_FILE $UNIT_INSTANCE
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}
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function action_enable(){
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local UNIT_FILE=$1
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local UNIT=`basename $UNIT_FILE`
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local UNIT_INSTANCE=$2
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local UNIT_FULL=`echo $UNIT | sed "s/@/@$UNIT_INSTANCE/"`
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local WantedBy=`read_option WantedBy $UNIT_FILE`
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if [ -z $WantedBy ] ; then
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>&2 echo "Unit $UNIT have no WantedBy option."
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exit 1
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fi
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local WANTEDBY_DIR="/etc/systemd/system/$WantedBy.wants"
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if [ ! -f "$WANTEDBY_DIR/$UNIT_FULL" ] ; then
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mkdir -p $WANTEDBY_DIR
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echo Created symlink from $WANTEDBY_DIR/$UNIT_FULL to $UNIT_FILE.
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ln -s $WANTEDBY_DIR/$UNIT_FULL $UNIT_FILE
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fi
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}
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function action_disable(){
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local UNIT_FILE=$1
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local UNIT=`basename $UNIT_FILE`
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local UNIT_INSTANCE=$2
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local UNIT_FULL=`echo $UNIT | sed "s/@/@$UNIT_INSTANCE/"`
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local WantedBy=`read_option WantedBy $UNIT_FILE`
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if [ -z $WantedBy ] ; then
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>&2 echo "Unit $UNIT have no WantedBy option."
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exit 1
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fi
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local WANTEDBY_DIR="/etc/systemd/system/$WantedBy.wants"
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if [ -f "$WANTEDBY_DIR/$UNIT_FULL" ] ; then
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echo Removed $WANTEDBY_DIR/$UNIT_FULL.
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rm -f $WANTEDBY_DIR/$UNIT_FULL.
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rmdir --ignore-fail-on-non-empty $WANTEDBY_DIR
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fi
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}
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function action_status(){
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# Find depended services
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local UNIT_FILE=$1
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local UNIT_WANTS=(`get_unit_wants $1`)
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local UNIT_INSTANCE=$2
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local ExecStart=`read_option ExecStart $UNIT_FILE $UNIT_INSTANCE`
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COMMAND="pgrep -f \"$ExecStart\" &>/dev/null"
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if eval "$COMMAND"; then
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exit 0
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fi
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>&2 echo "Loaded: not-found"
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exit 1
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}
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function action_is_enabled(){
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exit 0
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}
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function action_is_active(){
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local UNIT=`basename $1`
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if systemctl status $UNIT ; then
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>&2 echo "active"
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exit 0
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fi
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exit 1
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}
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function exec_action(){
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local ACTION=$1
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local UNIT=$2
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[[ $UNIT =~ '.' ]] || UNIT="$UNIT.service"
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if [[ $UNIT =~ '@' ]] ; then
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local UNIT_INSTANCE=`echo $UNIT | cut -d'@' -f2- | cut -d. -f1`
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local UNIT=`echo $UNIT | sed "s/$UNIT_INSTANCE//"`
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fi
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UNIT_FILE=`get_unit_file $UNIT`
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if [ -z $UNIT_FILE ] ; then
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>&2 echo "Failed to $ACTION $UNIT: Unit $UNIT not found."
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exit 1
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else
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case "$ACTION" in
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start ) action_start $UNIT_FILE $UNIT_INSTANCE ;;
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stop ) action_stop $UNIT_FILE $UNIT_INSTANCE ;;
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restart ) action_restart $UNIT_FILE $UNIT_INSTANCE ;;
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enable ) action_enable $UNIT_FILE $UNIT_INSTANCE ;;
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disable ) action_disable $UNIT_FILE $UNIT_INSTANCE ;;
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status ) action_status $UNIT_FILE $UNIT_INSTANCE ;;
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is-enabled ) action_is_enabled $UNIT_FILE $UNIT_INSTANCE ;;
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is-active ) action_is_active $UNIT_FILE $UNIT_INSTANCE ;;
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* ) >&2 echo "Unknown operation $ACTION." ; exit 1 ;;
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esac
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fi
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}
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ACTION="$1"
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UNITS="${@:2}"
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UNIT_PATHS=(
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/etc/systemd/system/
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/usr/lib/systemd/system/
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)
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for UNIT in ${UNITS[@]}; do
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exec_action $ACTION $UNIT
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done
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