init.d

#!/bin/sh
### BEGIN INIT INFO
# Provides:          basic
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Starts/stops basic service
# Description:       A basic init script that starts, stops, and checks status
### END INIT INFO

NAME="basic"
DAEMON="/home/root/basic"
PIDFILE="/var/run/$NAME.pid"

start_service() {
    echo "Starting $NAME..."

    # If a PID file already exists, assume the service (or stale file) is present
    if [ -f "$PIDFILE" ]; then
        echo "$NAME is already running or a stale PID file exists."
        exit 1
    fi

    # Start the daemon in the background
    "$DAEMON" &
    
    # Wait briefly to let the daemon fully spawn (especially if it forks)
    sleep 1

    # Grab the PID of the first matching process. Adjust pattern if needed.
    PID="$(pgrep -f "$DAEMON" | head -n 1)"

    if [ -n "$PID" ]; then
        echo "$PID" > "$PIDFILE"
        echo "$NAME started with PID $PID."
    else
        echo "Failed to start $NAME. No matching process found."
    fi
}

stop_service() {
    echo "Stopping $NAME..."

    if [ ! -f "$PIDFILE" ]; then
        echo "$NAME is not running (no PID file)."
        exit 1
    fi

    PID="$(cat "$PIDFILE")"

    # Attempt to stop the process
    if kill "$PID" 2>/dev/null; then
        rm -f "$PIDFILE"
        echo "$NAME stopped."
    else
        echo "Could not kill process $PID. Removing stale PID file."
        rm -f "$PIDFILE"
    fi
}

status_service() {
    if [ -f "$PIDFILE" ]; then
        PID="$(cat "$PIDFILE")"
        # Check whether that PID is still running and matches our daemon
        if pgrep -f "$DAEMON" | grep -q "^$PID\$"; then
            echo "$NAME is running with PID $PID."
        else
            echo "$NAME is not running, but PID file exists. Removing stale PID file..."
            rm -f "$PIDFILE"
        fi
    else
        echo "$NAME is not running."
    fi
}

case "$1" in
    start)
        start_service
        ;;
    stop)
        stop_service
        ;;
    status)
        status_service
        ;;
    restart)
        stop_service
        start_service
        ;;
    *)
        echo "Usage: $0 {start|stop|status|restart}"
        exit 1
        ;;
esac

exit 0