Rust System Log (Unix & Like-Unix)#
In this blog post, we’ll explore a simple Rust program that demonstrates how to log a message to the system log on a Linux-based system using the syslog crate.
Prerequisites#
Before running this program, ensure you have the following installed on your system:
- Rust toolchain (including Cargo)
- Systemd or another syslog daemon (such as rsyslog or syslog-ng)
Building the Program#
- Clone or download this repository to your local machine.
- Navigate to the project directory in your terminal.
Terminal window 1cd sysunixlog - Build the program using Cargo:
Terminal window 1cargo build --release
Running the Program#
After successfully building the program, execute it using:
1cargo run --release
or run the binary directly:
1./target/release/sysunixlog
Checking the System Log#
For systemd users:#
Use the journalctl
command to view logs managed by systemd. To filter logs from your program, you can use:
1journalctl | grep myprogram
Replace “myprogram” with the name specified in your Rust code.
For traditional syslog users:#
Use the tail
command to view the syslog file. For example:
1sudo tail -f /var/log/syslog | grep myprogram
Replace “myprogram” with the name specified in your Rust code.
Troubleshooting#
- Ensure that the syslog service is running on your system.
- Check permissions if you encounter issues with logging to the system log.
- If you encounter any issues, feel free to open an issue in this repository for assistance.
Now, let’s take a look at the Rust code:
1extern crate syslog;2
3use syslog::{Facility, Formatter3164};4
5fn main() {6 // Initialize the logger7 let formatter = Formatter3164 {8 facility: Facility::LOG_USER,9 hostname: None,10 process: "sysunixlog".into(),11 pid: 0,12 };13
14 match syslog::unix(formatter) {15 Err(e) => println!("impossible to connect to syslog: {}", e),16 Ok(mut writer) => {17 // Log the message18 writer.err("Genesis of Generic Germination U0001F49A, Anubhav!").expect("could not write error message");19 }20 }21}
And there you have it! With just a few simple steps, you can log messages to the system log in Rust. Happy logging! 🚀