181–190 of 197 posts
Impl code here[1]: int32 is_computer_on(void) { return _kern_is_computer_on(); } double is_computer_on_fire(void) { return 0.63739; } [1] https://github.com/haiku/haiku/blob/master/src/system/libroo... Was used by the Haiku doc, namely "System calls"[2], as an example. [2] https://www.haiku-os.org/documents/dev/system_calls/
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That's AMT, provided by Intel ME. As far as I'm concerned ME-equipped NICs should unconditionally be behind VPNs, but the AMT functionality itself is really cool. Even the 10+ year old machines that don't support VNC let you remotely hit CTRL+ALT+DEL, issue an ACPI shutdown, perform a hard reset (equivalent to hitting the reset button on 486-era boxen), etc. So basically you can do either soft or hard shutdowns or re…
Can it enter the password required to decrypt my LUKS partition? Lately this has been my biggest barrier to leaving a computer fully remote.
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I admire for how you nerdsniped several other comments without anyone noticing the platform, or how "halt" would drop you into console monitor on said platform. My standing ovation to you :D (The platform is Alpha, right? Given the prompt and name for the console, though it was SRM, not SRE) :)
SRM it is. Thanks! (Alpha) System Reference Manual: https://en.wikipedia.org/wiki/System_Reference_Manual Funny thing, for some historic reason, the system terminal attached to cabinet with those memorable Alpha Servers was of the monochrome lineage, but the phosphors color was orange. So the >>> prompt was unmistakably a carrot one! However it would rarely be seen, as bulk of the time the console would busily beep a…
Interestingly enough, there are few systems in Alpha lineage that have what's known as "external console", meaning that instead of running SRM on the normal CPUs, they had separate frontend processor and main cpus only had shims to communicate with it. Marvel was one of those, but apparently there were older ones as well.
Also, if you had partition-capable Alpha, the carrot prompt would be made into Pxx> where xx referred to currently selected cpu. With VMS, you could then boot into "VMS Galaxy" mode where you had multiple VMS systems running without hypervisor, just with all of them carefully avoiding stepping on each others' resources.
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That's AMT, provided by Intel ME. As far as I'm concerned ME-equipped NICs should unconditionally be behind VPNs, but the AMT functionality itself is really cool. Even the 10+ year old machines that don't support VNC let you remotely hit CTRL+ALT+DEL, issue an ACPI shutdown, perform a hard reset (equivalent to hitting the reset button on 486-era boxen), etc. So basically you can do either soft or hard shutdowns or re…
Can it enter the password required to decrypt my LUKS partition? Lately this has been my biggest barrier to leaving a computer fully remote.
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Can it enter the password required to decrypt my LUKS partition? Lately this has been my biggest barrier to leaving a computer fully remote.
Store the LUKS crypto key in the TPM, and make sure secure boot is used so the TPM will only reveal the key if the systems boot chain is verified.
While this is a joke, there are some contexts in which it does make sense to ask whether the computer is on. For instance, most laptops have an embedded controller which runs all the time, even when the laptop is powered off, and manages things like battery charging and the power state. Within that embedded controller, an is_computer_on() function could legitimately return "false".
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Can it enter the password required to decrypt my LUKS partition? Lately this has been my biggest barrier to leaving a computer fully remote.
You can embed a minimal ssh server (like dropbear or tinyssh) in your initramfs to remotely enter the passphrase. There are some guides for that online
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That's AMT, provided by Intel ME. As far as I'm concerned ME-equipped NICs should unconditionally be behind VPNs, but the AMT functionality itself is really cool. Even the 10+ year old machines that don't support VNC let you remotely hit CTRL+ALT+DEL, issue an ACPI shutdown, perform a hard reset (equivalent to hitting the reset button on 486-era boxen), etc. So basically you can do either soft or hard shutdowns or re…
Can it enter the password required to decrypt my LUKS partition? Lately this has been my biggest barrier to leaving a computer fully remote.
I kneejerk-recommend a bastion host because a) Intel ME, and b) there was that all-0 password bypass a while back and uhhh yeah who knows what other "sneeze correctly and the leaf falls over" knock sequences there are.
SSH port forwarding, VPN, RPi running the remote-access AMT web UI thingy (runs on Linux, forget what it's called) behind nginx with authentication... you get the idea.