Created
September 16, 2016 05:49
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startup script for nightlight.py
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#!/bin/sh | |
### BEGIN INIT INFO | |
# Provides: nightlight | |
# Required-Start: $remote_fs | |
# Required-Stop: $remote_fs | |
# Default-Start: 2 3 4 5 | |
# Default-Stop: 0 1 6 | |
# Short-Description: A comforting light to keep you out of the dark | |
# Description: Toggle GPIO LED from MCP3304 ADC to OPT101 photodiode | |
### END INIT INFO | |
# Do NOT "set -e" | |
# PATH should only include /usr/* if it runs after the mountnfs.sh script | |
PATH=/sbin:/usr/sbin:/bin:/usr/bin | |
DESC="nightlight daemon" | |
NAME=nightlight | |
#DAEMON=/usr/bin/$NAME | |
DAEMON=/home/pi/spi/nightlight.py | |
ARGS="" | |
PIDFILE=/var/run/$NAME.pid | |
SCRIPTNAME=/etc/init.d/$NAME | |
export QUIET=1 | |
# Exit if the package is not installed | |
[ -x "$DAEMON" ] || exit 0 | |
# Read configuration variable file if it is present | |
[ -r /etc/default/$NAME ] && . /etc/default/$NAME | |
# work out daemon args | |
# Load the VERBOSE setting and other rcS variables | |
. /lib/init/vars.sh | |
# Define LSB log_* functions. | |
# Depend on lsb-base (>= 3.2-14) to ensure that this file is present | |
# and status_of_proc is working. | |
. /lib/lsb/init-functions | |
# | |
# 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 --user root --exec $DAEMON --test > /dev/null \ | |
|| return 1 | |
start-stop-daemon --start --quiet --pidfile $PIDFILE --user root --make-pidfile --background --no-close --exec $DAEMON -- \ | |
$ARGS \ | |
|| return 2 | |
sleep 1 | |
} | |
# | |
# 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 --retry=TERM/30/KILL/5 --pidfile $PIDFILE --user root #--exec $DAEMON # don't pass --exec since is /usr/bin/python for scripts | |
RETVAL="$?" | |
[ "$RETVAL" = 2 ] && return 2 | |
sleep 1 | |
# Many daemons don't delete their pidfiles when they exit. | |
rm -f $PIDFILE | |
return "$RETVAL" | |
} | |
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 $? | |
;; | |
restart|force-reload) | |
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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