still working in (2). i cant figure out a way cause read() to actually wake up when theres input from the device.

anyone know a way to magically bless a process, or file on the filesystem, or something, that will prevent or interrupt deep sleep?

so i decided to just run `keepalive-tool sf-button-monitor` to never let the phone deep sleep, ever.
my battery usage for a full day used to be 100%=>72%, and now its 100%=>61%. this is easily worth it, to have the button actions always work without unlocking the phone first. i had not realized how LITTLE deep sleep was actually doing for me.

3 months of keepalive-tool running constantly, and my battery hasnt died once.
(the volume buttons just always work, locked or unlocked, like on the N9)

added repeated-commands

e.g.:
action=repeat(500, brightness +1),ch-press vu-press,always
=> hold camera-half and volume-up to have brightness incrementally increase
(where `brightness` is a script you write)

i get error loop on line 264 and 268, read on closed filehandle, use of uninitialized value $buttonId...

updated for Xperia 10 III

added support for power button and "google assist" (camera) button.

power button also works now on Xperia XZ2 Compact, and maybe others (but not Xperia X or Xperia X Compact)

(power button still of course also always locks/unlocks the phone, so this is maybe not that useful)