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init: initial keypress send

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This commit is contained in:
Himadri Bhattacharjee
2026-01-09 20:44:12 +05:30
commit 2de7020ce8
8 changed files with 231 additions and 0 deletions
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1
.envrc Normal file
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use flake

2
.gitignore vendored Normal file
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/target
.direnv

97
Cargo.lock generated Normal file
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# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 4
[[package]]
name = "bitflags"
version = "2.10.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
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"funty",
"radium",
"tap",
"wyz",
]
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dependencies = [
"bitvec",
"cfg-if",
"libc",
"nix",
]
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name = "kwargs"
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dependencies = [
"bitflags",
"cfg-if",
"cfg_aliases",
"libc",
]
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name = "radium"
version = "0.7.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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7
Cargo.toml Normal file
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[package]
name = "lollipop"
version = "0.1.0"
edition = "2024"
[dependencies]
evdev = "0.13.2"

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LICENSE Normal file
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MIT License
Copyright (c) 2026 Himadri Bhattacharjee
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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flake.lock generated Normal file
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{
"nodes": {
"nixpkgs": {
"locked": {
"lastModified": 1767364772,
"narHash": "sha256-fFUnEYMla8b7UKjijLnMe+oVFOz6HjijGGNS1l7dYaQ=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "16c7794d0a28b5a37904d55bcca36003b9109aaa",
"type": "github"
},
"original": {
"id": "nixpkgs",
"type": "indirect"
}
},
"root": {
"inputs": {
"nixpkgs": "nixpkgs"
}
}
},
"root": "root",
"version": 7
}

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flake.nix Normal file
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{
description = "flake for github:lavafroth/shush";
outputs =
{
nixpkgs,
...
}:
let
forAllSystems =
f:
nixpkgs.lib.genAttrs nixpkgs.lib.systems.flakeExposed (system: f nixpkgs.legacyPackages.${system});
in
{
devShells = forAllSystems (pkgs: {
default = pkgs.mkShell {
buildInputs = with pkgs; [
stdenv.cc.cc.lib
];
LD_LIBRARY_PATH = with pkgs; lib.makeLibraryPath [
wayland-protocols
wayland
libxkbcommon
libGL
];
};
});
};
}

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src/main.rs Normal file
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use evdev::uinput::VirtualDevice;
use evdev::{AttributeSet, EventType, InputEvent, KeyCode, KeyEvent};
use std::thread::sleep;
use std::time::Duration;
pub enum KeyState {
Latched(),
Locked,
None,
}
fn main() -> std::io::Result<()> {
let mut keys = AttributeSet::<KeyCode>::default();
keys.insert(KeyCode::KEY_A);
let mut device = VirtualDevice::builder()?
.name("lollipop")
.with_keys(&keys)?
.build()?;
for path in device.enumerate_dev_nodes_blocking()? {
let path = path?;
println!("Available as {}", path.display());
}
sleep(Duration::from_secs(2));
let code = KeyCode::KEY_A.code();
loop {
// this guarantees a key event
let down_event = *KeyEvent::new(KeyCode(code), 1);
device.emit(&[down_event]).unwrap();
println!("Pressed.");
sleep(Duration::from_secs(2));
// alternativeley we can create a InputEvent, which will be any variant of InputEvent
// depending on the type_ value
let up_event = InputEvent::new(EventType::KEY.0, code, 0);
device.emit(&[up_event]).unwrap();
println!("Released.");
sleep(Duration::from_secs(2));
}
Ok(())
}