kanit

Toy init system
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hostname.rs (809B)

      1 use async_trait::async_trait;
      2 use blocking::unblock;
      3 use nix::unistd::sethostname;
      4 
      5 use kanit_common::error::{Context, ErrorKind, Result};
      6 use kanit_unit::{Dependencies, Unit};
      7 
      8 use crate::oneshot::Clock;
      9 use crate::unit_name;
     10 
     11 pub struct Hostname;
     12 
     13 #[async_trait]
     14 impl Unit for Hostname {
     15     unit_name!("hostname");
     16 
     17     fn dependencies(&self) -> Dependencies {
     18         Dependencies::new().after(Clock.name()).clone()
     19     }
     20 
     21     async fn start(&mut self) -> Result<()> {
     22         let hostname = async_fs::read_to_string("/etc/hostname")
     23             .await
     24             .unwrap_or_else(|_| "homosexual".to_string());
     25 
     26         unblock(move || sethostname(hostname.trim_start().trim_end()))
     27             .await
     28             .context_kind("failed to set hostname", ErrorKind::Recoverable)?;
     29 
     30         Ok(())
     31     }
     32 }