Crate android_logd_logger

android-logd-logger

This logger writes logs to the Android logd, a system service with multiple ringbuffers for logs and evens. This is normally done via liblog (a native Android lib). Instead of using liblog, this crate writes directly to the logd socket with the trivial protocol below. This logger is written in pure Rust without any need for ffi.

On non Android system the log output is printed to stdout in the default format of logcat.

Usage

Add this to your Cargo.toml

[dependencies]
android-logd-logger = "0.2.1"

Initialize the logger with a fixed tag and the module path included in the log payload.

fn main() {
    android_logd_logger::builder()
        .parse_filters("debug")
        .tag("log_tag")
        .prepend_module(true)
        .init();

    trace!("trace message: is not logged");
    debug!("debug message");
    info!("info message");
    warn!("warn message");
    error!("error message");
}

To write android logd “events” use event or event_now, e.g:

android_logd_logger::write_event_now(1, "test").unwrap();

Configuration

Writing to the logd socket is a single point of synchronization for threads. The android-logd-logger can be configured with the tls feature to maintain one socket per thread or use a single socket for the whole process. Use the features tls if you want less interference between threads but pay for one connection per thread.

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

Structs

Builder	Builder for initializing logger
Event	Event data

Enums

Buffer	Log buffer ids
Error	Error
EventValue	Event’s value

Functions

builder	Returns a default Builder for configuration and initialization of logging.
write_event	Write an event to Buffer::Events
write_event_buffer	Write an event to an explicit buffer
write_event_buffer_now	Write an event with the timestamp now to buffer
write_event_now	Write an event with the timestamp now to Buffer::Events

Type Definitions

EventTag

Event tag