node_debian_init.sh

#!/bin/bash

PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/bin # modify if you need
DAEMON_ARGS="/home/hastebin/haste-server/server.js" # path to your node.js server/app
DESC="node.js pastebin server" # whatever fancy description you like
NODEUSER=hastebin:hastebin # USER who OWNS the daemon process (no matter whoever runs the init script)
LOCAL_VAR_RUN=/var/run # in case the init script is run by non-root user, you need to
NAME=node # name of the node.js executable
DAEMON=/usr/local/bin/$NAME # this SHOULD POINT TO where your node executable is
 
# Do NOT "set -e"
 
[ $UID -eq "0" ] && LOCAL_VAR_RUN=/var/run # in case this script is run by root, override user setting
THIS_ARG=$0
INIT_SCRIPT_NAME=`basename $THIS_ARG`
[ -h $THIS_ARG ] && INIT_SCRIPT_NAME=`basename $(readlink $THIS_ARG)` # in case of symlink
INIT_SCRIPT_NAME_NOEXT=${INIT_SCRIPT_NAME%.*}
PIDFILE="$LOCAL_VAR_RUN/$INIT_SCRIPT_NAME_NOEXT.pid"
SCRIPTNAME=/etc/init.d/$INIT_SCRIPT_NAME
 
# Exit if the package is not installed
[ -x "$DAEMON" ] || { echo "can't find Node.js ($DAEMON)" >&2; exit 0; }
 
# Exit if the 'run' folder is not present
[ -d "$LOCAL_VAR_RUN" ] || { echo "Directory $LOCAL_VAR_RUN does not exist. Modify the '$INIT_SCRIPT_NAME_NOEXT' init.d script ($THIS_ARG) accordingly" >&2; exit 0; }
 
# Read configuration variable file if it is present
[ -r /etc/default/$INIT_SCRIPT_NAME ] && . /etc/default/$INIT_SCRIPT_NAME
 
# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh
 
# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions
 
# uncomment to override system setting
# VERBOSE=yes
 
#
# Function that starts the daemon/service
#
do_start()
{
# Return
# 0 if daemon has been started
# 1 if daemon was already running
# 2 if daemon could not be started
start-stop-daemon --start --quiet --pidfile $PIDFILE --chuid $NODEUSER  --chdir /home/hastebin/haste-server/ --background --exec $DAEMON --test > /dev/null \
|| { [ "$VERBOSE" != no ] && log_daemon_msg " ---> Daemon already running $DESC" "$INIT_SCRIPT_NAME_NOEXT"; return 1; }
start-stop-daemon --start --quiet  --chuid $NODEUSER --make-pidfile --pidfile $PIDFILE  --chdir /home/hastebin/haste-server/ --background --exec $DAEMON -- \
$DAEMON_ARGS \
|| { [ "$VERBOSE" != no ] && log_daemon_msg " ---> could not be start $DESC" "$INIT_SCRIPT_NAME_NOEXT"; return 2; }
# Add code here, if necessary, that waits for the process to be ready
# to handle requests from services started subsequently which depend
# on this one. As a last resort, sleep for some time.
[ "$VERBOSE" != no ] && log_daemon_msg " ---> started $DESC" "$INIT_SCRIPT_NAME_NOEXT"
}
 
#
# Function that stops the daemon/service
#
do_stop()
{
# Return
# 0 if daemon has been stopped
# 1 if daemon was already stopped
# 2 if daemon could not be stopped
# other if a failure occurred
start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --chuid $NODEUSER --exec $DAEMON
RETVAL="$?"
#[ "$VERBOSE" != no ] && [ "$RETVAL" = 1 ] && log_daemon_msg " ---> SIGKILL failed => hardkill $DESC" "$INIT_SCRIPT_NAME_NOEXT"
[ "$RETVAL" = 2 ] && return 2
# Wait for children to finish too if this is a daemon that forks
# and if the daemon is only ever run from this initscript.
# If the above conditions are not satisfied then add some other code
# that waits for the process to drop all resources that could be
# needed by services started subsequently. A last resort is to
# sleep for some time.
start-stop-daemon --stop --quiet --oknodo --retry=0/3/KILL/5 --pidfile $PIDFILE --chuid $NODEUSER --exec $DAEMON -- $DAEMON_ARGS
[ "$?" = 2 ] && return 2
# Many daemons don't delete their pidfiles when they exit.
rm -f $PIDFILE
[ "$VERBOSE" != no ] && [ "$RETVAL" = 1 ] && log_daemon_msg " ---> $DESC not running" "$INIT_SCRIPT_NAME_NOEXT"
[ "$VERBOSE" != no -a "$RETVAL" = 0 ] && log_daemon_msg " ---> $DESC stopped" "$INIT_SCRIPT_NAME_NOEXT"
return "$RETVAL"
}
 
#
# Function that sends a SIGHUP to the daemon/service
#
do_reload() {
#
# If the daemon can reload its configuration without
# restarting (for example, when it is sent a SIGHUP),
# then implement that here.
#
start-stop-daemon --stop --quiet --signal 1 --pidfile $PIDFILE --chuid $NODEUSER --name $NAME
return 0
}
 
#
# Function that returns the daemon
#
do_status() {
#
# http://refspecs.freestandards.org/LSB_3.1.1/LSB-Core-generic/LSB-Core-generic/iniscrptact.html
# 0 program is running or service is OK
# 1 program is dead and /var/run pid file exists
# (2 program is dead and /var/lock lock file exists) (not used here)
# 3 program is not running
# 4 program or service status is unknown
RUNNING=$(running)
# $PIDFILE corresponds to a live $NAME process
ispidactive=$(pidof $NAME | grep `cat $PIDFILE 2>&1` >/dev/null 2>&1)
ISPIDACTIVE=$?
 
if [ -n "$RUNNING" ]; then
if [ $ISPIDACTIVE ]; then
log_success_msg "$INIT_SCRIPT_NAME_NOEXT (launched by $USER) (--chuid $NODEUSER) is running"
exit 0
fi
else
if [ -f $PIDFILE ]; then
log_success_msg "$INIT_SCRIPT_NAME_NOEXT (launched by $USER) (--chuid $NODEUSER) is not running, phantom pidfile $PIDFILE"
exit 1
else
log_success_msg "no instance launched by $USER, of $INIT_SCRIPT_NAME_NOEXT (--chuid $NODEUSER) found"
exit 3
fi
fi
}
 
running() {
RUNSTAT=$(start-stop-daemon --start --quiet --pidfile $PIDFILE --chuid $NODEUSER --background --exec $DAEMON --test > /dev/null)
if [ "$?" = 1 ]; then
echo y
fi
}
 
 
case "$1" in
start)
[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$INIT_SCRIPT_NAME_NOEXT"
do_start
case "$?" in
0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
;;
stop)
[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$INIT_SCRIPT_NAME_NOEXT"
do_stop
case "$?" in
0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
;;
#reload|force-reload)
#
# If do_reload() is not implemented then leave this commented out
# and leave 'force-reload' as an alias for 'restart'.
#
#log_daemon_msg "Reloading $DESC" "$NAME"
#do_reload
#log_end_msg $?
#;;
restart|force-reload)
#
# If the "reload" option is implemented then remove the
# 'force-reload' alias
#
log_daemon_msg "Restarting $DESC" "$INIT_SCRIPT_NAME_NOEXT"
do_stop
case "$?" in
0|1)
do_start
case "$?" in
0) log_end_msg 0 ;;
1) log_end_msg 1 ;; # Old process is still running
*) log_end_msg 1 ;; # Failed to start
esac
;;
*)
# Failed to stop
log_end_msg 1
;;
esac
;;
status)
do_status
;;
*)
#echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
echo "Usage: $SCRIPTNAME {status|start|stop|restart|force-reload}" >&2
exit 3
;;
esac
 
exit 0