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#!/bin/bash
#
# simbamond -- init interface to simbamon, a simple battery monitor
#
# Author: Hamish Cunningham <hamish@gate.ac.uk>
# Derived from Ubuntu 12.04 /etc/init.d/skeleton, July 2013.
# This code is copyright Hamish Cunningham and the University of Sheffield
# and is licenced under GPL 3 or any later version.
#
### BEGIN INIT INFO
# Provides: simbamond
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: simbamond: a simple battery monitor daemon
# Description: This script is the init interface to simbamon
# (a simple battery monitor)
### END INIT INFO
# Defaults
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="simbamond: a simple battery monitor daemon"
NAME=simbamon
DNAME=simbamond
DAEMON=/usr/sbin/$NAME
PIDFILE=/var/run/$DNAME.pid
SCRIPTNAME=/etc/init.d/$DNAME
START_STOP_ARGS="--pidfile ${PIDFILE} --startas ${DAEMON} --name ${NAME}"
# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0
# Needs to be run as root
if [ $(id -u) -ne 0 ]
then
case "$1" in
help|status|"")
;;
*)
echo "${DAEMON} $1 must be run as root; try 'sudo service simbamond ...'?"
exit 1
esac
fi
# Read configuration variable file if it is present
[ -r /etc/default/$DNAME ] && . /etc/default/$DNAME
# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh
# Define LSB log_* functions.
. /lib/lsb/init-functions
# Pass on command options
get-daemon-args() { shift; DAEMON_ARGS=$*; }
get-daemon-args $*
# Function that starts the daemon/service
do_start()
{
logger ${NAME}: starting...
# Return
# 0 if daemon has been started
# 1 if daemon was already running
# 2 if daemon could not be started
start-stop-daemon --start $START_STOP_ARGS --test > /dev/null \
|| return 1
start-stop-daemon --start $START_STOP_ARGS -- $DAEMON_ARGS \
|| return 2
log_success_msg Started $NAME
}
# Function that stops the daemon/service
# Returns:
# 0 if daemon has been stopped
# 1 if daemon was already stopped
# 2 if daemon could not be stopped
# other if a failure occurred
do_stop()
{
logger ${NAME}: stopping...
log_daemon_msg ${NAME}: stopping...
# If there's no PIDFILE then either daemon hasn't been started, or
# it has killed itself (which it will do when MoPi triggers shutdown)
[ -f $PIDFILE ] || {
return 1
}
start-stop-daemon --stop $START_STOP_ARGS --retry=TERM/30/KILL/5
RETVAL="$?"
[ "$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 $START_STOP_ARGS --quiet --oknodo --retry=0/30/KILL/5
[ "$?" = 2 ] && return 2
# Many daemons don't delete their pidfiles when they exit.
rm -f $PIDFILE
log_success_msg $NAME stopped
return "$RETVAL"
}
# Function that sends a SIGHUP to the daemon/service
do_reload() {
logger ${NAME}: reloading...
#
# 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 --signal 1 --quiet --pidfile $PIDFILE --name $NAME
# we can't reload, do restart instead
return 1
}
# Do the work
case "$1" in
start)
[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
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 $DESC" "$NAME"
do_stop
case "$?" in
0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
;;
status)
status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
;;
#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 $DESC" "$NAME"
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
;;
*)
echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
exit 3
;;
esac
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