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Reboot and / or Shutdown script to run if anything causes reboot unintentially

  • Hello,

    I was just wondering for a solution regarding unintentially reboot.

    My problem is, I would like to know if anything other than my script: OS or other scripts initiate a reboot sequence I want my script to notice that and interrupt reboot, and do some stuff and continue reboot/shutdown.

    Could this possible?

    And one another question, can I leave some ports as it is (output high or low, not pwm) during reboot?


  • @esunayg Unfortunately, I am unable to give any definitive response to your first question regarding catching shutdown/reboot to carry out some commands.
    I believed it should be possible via relevant entries in /etc/init.d and /etc/rc.d and this is largely born out by information that can be found in https://wiki.openwrt.org/doc/techref/process.boot and https://wiki.openwrt.org/doc/techref/initscripts
    However, as yet I have not managed to get anything along these lines to work - I am eventually going to need something like that - I will probably come back to investigate further later, but meanwhile I hope the references may help.

    Associated with this, note:

    • Any commands in /etc/rc.local are executed when the system boots
    • Any commands in /etc/profile are executed when you log on

    Regarding whether or not GPIO pins maintain there state over a reboot (obviously they would be lost over power off/power on), my testing suggests that, unfortunately, NO - they are not preserved over a reboot. I tried setting GPIO pins as outputs with specific output states and then doing a reboot. After the reboot the pins did NOT have the same state as before.

  • Thank you @kit-bishop,

    I will read them.

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