meta-digi/meta-digi-dey/recipes-crank/crank-demos/crank-demos/crank-demo-init

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#!/bin/sh
#===============================================================================
#
# Copyright (C) 2022, 2023 by Digi International Inc.
# All rights reserved.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 as published by
# the Free Software Foundation.
#
#
# !Description: Initialize Crank demo
#
#===============================================================================
readonly DEMO="##CRANK_DEMO_PATH##"
readonly DEMO_DISPLAY="##CRANK_DEMO_DISPLAY##"
readonly DEMO_OPTS="##CRANK_DEMO_OPTIONS##"
readonly DEMO_ENV="##CRANK_DEMO_ENV##"
readonly SB_LAUNCHER="sb-launcher"
readonly SB_LAUNCHER_SCRIPT="/usr/bin/${SB_LAUNCHER}"
readonly CRANK_DEMO="crank-demo"
readonly PID_FILE="/run/${CRANK_DEMO}.pid"
[ -f "/etc/profile.d/tslib.sh" ] && . /etc/profile.d/tslib.sh
log() {
if type "systemd-cat" >/dev/null 2>/dev/null; then
systemd-cat -p "${1}" -t "${CRANK_DEMO}" printf "%s" "${2}"
fi
logger -p "${1}" -t "${CRANK_DEMO}" "${2}"
}
get_crank_demo_pid() {
local pid="$(pgrep -f ${DEMO})"
[ -n "${pid}" ] && { echo "${pid}"; return 0; }
return 1
}
check_is_running() {
local pid
if [ -s "${PID_FILE}" ]; then
pid="$(cat ${PID_FILE})"
else
pid="$(get_crank_demo_pid)"
echo "${pid}" > ${PID_FILE}
fi
if [ "${pid}" ]; then
kill -0 "${pid}" >/dev/null 2>&1 && return 0
fi
rm -f "${PID_FILE}"
return 1
}
wait_for_wayland() {
local count=20
local wayland_socket="/run/user/0/${DEMO_DISPLAY}"
while [ ! -S "${wayland_socket}" ]; do
sleep 1
count=$((count-1))
if [ "${count}" = 0 ]; then
return 1
fi
done
return 0
}
stop() {
check_is_running || return
local pid="$(cat ${PID_FILE})"
kill -TERM "${pid}" >/dev/null 2>&1
local STOP_TIMEOUT="5"
for i in $(seq ${STOP_TIMEOUT}); do
check_is_running || { log info "stopped"; break; }
if [ "${i}" -eq ${STOP_TIMEOUT} ]; then
log warning "stop: ${CRANK_DEMO} did not stop gracefully"
kill -KILL "${pid}" >/dev/null 2>&1
fi
sleep 1
done
}
start() {
check_is_running && { log warning "start: ${CRANK_DEMO} ALREADY running"; exit 0; }
[ -d "/usr/share/wayland" ] && wait_for_wayland
env ${DEMO_ENV} ${SB_LAUNCHER_SCRIPT} ${DEMO_OPTS} ${DEMO} >/dev/null 2>&1 &
if [ $? -eq 0 ]; then
echo $! > ${PID_FILE}
log info "$(cat ${PID_FILE})"
log info "started"
fi
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
stop
sleep 1
start
;;
*)
echo "Usage: $0 {start|stop|restart}"
exit 1
;;
esac