#events #linux #acpi #acpid

app user-acpid

non-root companion process for linux acpid ( https://sourceforge.net/projects/acpid2/ )

1 unstable release

0.1.0 Dec 19, 2021

#1502 in Hardware support

GPL-3.0-only

17KB
150 lines

user-acpid-rs Status Gitlab pipeline status Crates.io docs.rs

non-root companion process for linux acpid ( https://sourceforge.net/projects/acpid2/ )

status

  • works!

why

  • we want a way to react to ACPI events and act upon an interactive user session
  • this means being able to easily access the current dbus/wayland/pipewire/etc sessions
  • acpid is great, but it executes hooks as root instead of as the current interactive user
  • it's quite (intentionally) fiddly for anyone except that user to access user session sockets, buses, etc
  • this tool is intended to be executed as a non-root user in the context of their interactive session

use cases

  • in combination with wlr-randr, turn on/off a built-in display based on laptop lid status
  • turn on/off a built-in USB webcam based on laptop lid status
  • in combination with pw-cli, turn on/off a built-in USB microphone based on laptop lid status

dependencies

  • requires your system to be running acpid with the default --socketfile behaviour

roadmap

  • read events from /var/run/acpid.socket
  • identify lid open and lid close ACPI events
  • run ~/.config/user-acpid/button-lid-open when opened
  • run ~/.config/user-acpid/button-lid-close when closed
  • check lid status on startup
  • support alternative paths to acpid's socket file
  • handle socket closure and attempt to re-open after a delay
  • close and re-open socket after receiving SIGUSER1 signal
  • explore direct kernel access (independence from acpid)

Dependencies

~170–630KB