handy wrapper for some commands

daemovise.sh

@@ -0,0 +1,107 @@
+#!/bin/bash
+
+[ -e "env.sh" ] && source env.sh
+
+command=$1
+shift
+
+logdir='logs'
+rundir='run'
+
+logfile() {
+   local name=$(basename "$1")
+   echo "$logdir/$name.log"
+}
+
+pidfile() {
+   local name=$(basename "$1")
+   echo "$rundir/$name.pid"
+}
+
+start() {
+   mkdir -p "$logdir" "$rundir"
+   local name=$1
+   shift
+   local logfile=$(logfile "$name")
+   local pidfile=$(pidfile "$name")
+   DAEMOVISE_PIDFILE="$pidfile" ${DAEMOVISE:-daemovise} \
+      --append \
+      --exit-code 100 \
+      --outputs "$logfile" \
+      --pidfile "$pidfile" \
+      --throttle 1 \
+      --timeout 30 \
+      -- "$@"
+}
+
+_kill() {
+   local signal=$1
+   local pidfile=$(pidfile "$2")
+   if [ ! -e "$pidfile" ] ; then
+      echo "pid file not found" >&2
+      return 0
+   fi
+   local pid=$(<"$pidfile")
+   if [ -n "$pid" ] ; then
+      kill "$signal" "$pid"
+      return $?
+   else
+      echo "pid file is empty" >&2
+      return 1
+   fi
+}
+
+stop() {
+   _kill -TERM "$1"
+}
+
+hup() {
+   _kill -HUP "$1"
+}
+
+status() {
+   local pidfile=$(pidfile "$1")
+   if [ ! -e "$pidfile" ] ; then
+      echo "process not running"
+      return 0
+   fi
+   local pid=$(<"$pidfile")
+   if [ -n "$pid" ] ; then
+      ps -p "$pid" >/dev/null 2>&1
+      local dv=$(
+         perl -nle 'print for split /\x{00}/g' /proc/$pid/environ \
+         | sed -ne 's/DAEMOVISE_PIDFILE=//p'
+      )
+      if [ "$pidfile" == "$dv" ] ; then
+         echo "supervisor process is running"
+      else
+         echo "supervisor process is not running, pidfile is stale"
+      fi
+   else
+      echo "pid file is empty" >&2
+      return 1
+   fi
+}
+
+case "$command" in
+   (start)
+      start "$1" "$@"
+      ;;
+   (start=*)
+      name=${command#*=}
+      start "$name" "$@"
+      ;;
+   (stop)
+      stop "$1"
+      ;;
+   (hup)
+      hup "$1"
+      ;;
+   (status)
+      status "$1"
+      ;;
+   (*)
+      echo "$0 start/stop/hup/status command args..." >&2
+      exit 1
+      ;;
+esac