Gel-O

Gel-O is a library for manipulating user-input in Linux.

Gel-O can make your computer feel like Jell-O, by delaying all user input by a configurable number of milliseconds (and in various other ways).

Stability

Gel-O is experimental. Expect many breaking changes to come.

Why?

For fun, and to get my feet wet.

Requirements

• Linux
  • epoll (Linux 2.6.27+)
  • evdev kernel (approximately Linux 2.4+)
• Rust toolchain
  • version 1.34 or higher
• Transitive dependencies
  • C toolchain
  • autoconf and libtool
    • #apt install autoconf libtool
    • #yum install autoconf libtool
    • #pacman -S autoconf libtool

macOs and Windows are not supported at this time.

BSD support may be easy to add, as evdev was recently added to some BSD kernels

Features

• Configurable delay
• Works on Xorg, Wayland, and the Linux virtual terminal
• Runs smoothly on low power devices like raspberry pi due to efficient epoll-based architecture
• Works with every input device Linux does including mice, keyboards, power buttons, gamepads, flight sticks and more

Anti-features

• Requires read/write access to files in /dev/input, /dev/uinput

How to use

Download the source

git clone [this repo]

Compile the source. You need a rust toolchain and cargo.

cargo build --release --example delay

Run the produced binary with root privledges

sudo ./target/release/examples/delay [number of ms to delay]

TODO

• monitor filesystem for new devices, and add delay to them too (probably using inotify)
• add tests
• Create serializable event struct that sidesteps ownership issues with libevdev