# Sending to Syslog in Rust
[](https://github.com/Geal/rust-syslog/actions/workflows/rust.yml)
[](https://crates.io/crates/syslog)
A small library to send syslog messages to unix sockets, TCP or UDP.
## Installation
syslog is available on [crates.io](https://crates.io/crates/syslog) and can be included in your Cargo enabled project like this:
```toml
[dependencies]
syslog = "^6.0"
```
## documentation
Reference documentation is available [here](https://docs.rs/syslog).
## Example
```rust
extern crate syslog;
use syslog::{Facility, Formatter3164};
fn main() {
let formatter = Formatter3164 {
facility: Facility::LOG_USER,
hostname: None,
process: "myprogram".into(),
pid: 42,
};
match syslog::unix(formatter) {
Err(e) => println!("impossible to connect to syslog: {:?}", e),
Ok(mut writer) => {
writer.err("hello world").expect("could not write error message");
}
}
}
```
The struct `syslog::Logger` implements `Log` from the `log` crate, so it can be used as backend for other logging systems:
```rust
extern crate syslog;
#[macro_use]
extern crate log;
use syslog::{Facility, Formatter3164, BasicLogger};
use log::{SetLoggerError, LevelFilter};
fn main() {
let formatter = Formatter3164 {
facility: Facility::LOG_USER,
hostname: None,
process: "myprogram".into(),
pid: 0,
};
let logger = syslog::unix(formatter).expect("could not connect to syslog");
log::set_boxed_logger(Box::new(BasicLogger::new(logger)))
.map(|()| log::set_max_level(LevelFilter::Info));
info!("hello world");
}
```
There are 3 functions to create loggers:
* the `unix` function sends to the local syslog through a Unix socket: `syslog::unix(formatter)`
* the `tcp` function takes an address for a remote TCP syslog server: `tcp(formatter, "127.0.0.1:4242")`
* the `udp` function takes an address for a local port, and the address remote UDP syslog server: `udp(formatter, "127.0.0.1:1234", "127.0.0.1:4242")`