moparisthebest/rusty-keys
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No more shelling out to grep, parse /proc/bus/input/devices manually

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This commit is contained in:
Travis Burtrum 2018-01-10 01:17:46 -05:00
parent 0e58664f67
commit 966cebf42a
1 changed files with 24 additions and 10 deletions
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32
src/main.rs
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@ -8,7 +8,7 @@ use rusty_keys::{KeyMaps, Device, InputDevice, Result};
use ffi::*; use ffi::*;
use libc::input_event; use libc::input_event;
use std::process::{exit, Command}; use std::process::exit;
use std::{env, thread}; use std::{env, thread};
use std::sync::mpsc; use std::sync::mpsc;
use std::sync::mpsc::Sender; use std::sync::mpsc::Sender;
@ -199,18 +199,32 @@ fn parse_args() -> Config {
// Detects and returns the name of the keyboard device file. This function uses // Detects and returns the name of the keyboard device file. This function uses
// the fact that all device information is shown in /proc/bus/input/devices and // the fact that all device information is shown in /proc/bus/input/devices and
// the keyboard device file should always have an EV of 120013 // the keyboard device file should always have an EV of 120013
// grep -E 'Handlers|EV' /proc/bus/input/devices | grep -B1 120013 | grep -Eo event[0-9]+
fn get_keyboard_device_filenames() -> Vec<String> { fn get_keyboard_device_filenames() -> Vec<String> {
let command_str = "grep -E 'Handlers|EV' /proc/bus/input/devices | grep -B1 120013 | grep -Eo event[0-9]+".to_string(); use std::io::BufReader;
let res = Command::new("sh").arg("-c").arg(command_str).output(); use std::io::prelude::*;
if res.is_err() { use std::fs::File;
let f = File::open("/proc/bus/input/devices");
if f.is_err() {
return Vec::new(); return Vec::new();
} }
let res = res.unwrap(); let f = BufReader::new(f.unwrap());
let res_str = std::str::from_utf8(&res.stdout).unwrap_or(""); let mut filename = None;
let mut filenames = Vec::new(); let mut filenames = Vec::new();
for file in res_str.trim().split('\n') { for line in f.lines() {
filenames.push(file.to_string()); if let Ok(line) = line {
if line.starts_with("H: Handlers=") {
if let Some(event_index) = line.find("event") {
let last_index = line[event_index..line.len()-1].find(" ").and_then(|i| Some(i + event_index)).unwrap_or(line.len() - 1);
filename = Some(line[event_index..last_index].to_owned());
}
} else if line == "B: EV=120013" {
if let Some(filename) = filename.clone() {
filenames.push(filename);
}
}
}
} }
filenames filenames
} }