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darkgallium 2020-06-14 01:02:16 +02:00
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1
.gitignore vendored Normal file
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/target

422
Cargo.lock generated Normal file
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# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
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14
Cargo.toml Normal file
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[package]
name = "mini"
version = "0.1.0"
authors = ["darkgallium <florian+github@aloneinthedark.xyz>"]
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
signal-hook = "0.1.15"
nix = "0.17.0"
toml = "0.5"
serde = { version = "1.0", features = ["derive"] }
tokio = { version = "0.2", features = ["full"] }

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config.toml Normal file
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keymap = 'fr'
modules = [
"r8169",
"rtl8821ae"
]

119
src/main.rs Normal file
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mod processes;
mod svc;
use std::fs;
use std::fs::File;
use std::io::prelude::*;
use std::path::Path;
use std::process;
use std::error::Error;
use signal_hook::{SIGINT, SIGCHLD, SIGALRM, SIGUSR1};
use nix::sys::wait::{waitpid, WaitPidFlag, WaitStatus};
use nix::sys::reboot::{reboot, RebootMode};
use nix::sys::signal::Signal;
use nix::sys::signal::kill;
use nix::unistd::Pid;
fn sigint_handler() {
println!("Received signal SIGINT");
process::exit(0);
}
fn reap_handler() {
loop {
match waitpid(Some(Pid::from_raw(-1)), Some(WaitPidFlag::WNOHANG)) {
Ok(WaitStatus::Exited(_pid, _code)) => return,
Err(e) => {
eprintln!("could not reap, error is {}", e);
return
},
_ => continue
}
}
}
fn set_hostname() {
let path = Path::new("/proc/sys/kernel/hostname");
let display = path.display();
let mut file = match File::create(&path) {
Err(why) => panic!("couldn't create {}: {}", display, why),
Ok(file) => file,
};
match file.write_all("octogone".as_bytes()) {
Err(why) => panic!("couldn't write to {}: {}", display, why),
Ok(_) => (),
}
}
async fn launch_services() {
let services = svc::get_services();
for s in services {
println!("starting {}", s.name);
let args: Vec<&str> = s.start.args.iter().map(|e| e.as_str()).collect();
processes::run(&s.start.command, &args[..]).await;
}
}
#[tokio::main]
async fn main() -> Result<(), Box<dyn Error>> {
println!("mini, the bare minimum init by darkgallium");
println!();
println!("remount /");
processes::run_wait("mount", ["-o", "remount", "/"].as_ref()).await;
println!("set hostname");
set_hostname();
println!("mount all partitions");
processes::run_wait("mount", ["-a"].as_ref()).await;
processes::run("swapon", ["-a"].as_ref()).await;
println!("load udev");
processes::run_wait("/usr/lib/systemd/systemd-udevd", ["-d"].as_ref()).await;
processes::run("udevadm", ["trigger", "--action=add", "--type=subsystems"].as_ref()).await;
processes::run("udevadm", ["trigger", "--action=add", "--type=devices"].as_ref()).await;
processes::run("udevadm", ["settle"].as_ref()).await;
println!("setting keymap");
processes::run("loadkeys", ["fr-latin9"].as_ref()).await;
println!("load dbus");
processes::run_wait("mkdir", ["/run/dbus"].as_ref()).await;
processes::run_wait("dbus-daemon", ["--system"].as_ref()).await; // a lot of services depend on dbus being on
println!("now loading your services");
launch_services().await;
unsafe { signal_hook::register(SIGINT, sigint_handler) }?;
let sigchld_handle = unsafe { signal_hook::register(SIGCHLD, reap_handler) }?;
println!("end bootstrap, launching your terminals");
// TODO: spawn a thread by tty and join threads at end
processes::sync_run_wait("agetty", ["--noclear", "tty1"].as_ref());
signal_hook::unregister(sigchld_handle);
println!("killing remaining processes");
let pids = processes::get_all_pids();
for pid in pids {
kill(Pid::from_raw(pid), Signal::SIGKILL);
}
println!("unmounting all partitions");
processes::run_wait("swapoff", ["-a"].as_ref()).await;
processes::run_wait("umount", ["-a", "-f"].as_ref()).await;
println!("end pre-shutdown routines");
reboot(RebootMode::RB_POWER_OFF);
Ok(())
}

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src/processes.rs Normal file
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use std::fs;
use std::process::{Stdio, Command};
use tokio::process::Command as AsyncCommand;
use tokio::process::Child as AsyncChild;
pub fn get_all_pids() -> Vec<i32> {
let mut pids = Vec::<i32>::new();
let files = fs::read_dir("/proc/").unwrap();
for entry in files {
let path = entry.unwrap().path();
if path.is_dir() {
if let Some(name) = path.file_name() {
let name = name.to_str().unwrap();
match name.parse::<i32>() {
Ok(pid) => {
if pid > 1 {
let content = fs::read_to_string(format!("/proc/{}/cmdline", pid));
match content {
Ok(cmdline) => {
//if cmdline != "" {
pids.push(pid);
//}
},
Err(_) => {}
}
}
},
Err(_) => {}
}
}
}
}
pids
}
pub fn sync_run_wait(path: &str, args: &[&str]) {
let mut child = Command::new(path)
.env("PATH", "/sbin:/bin:/usr/bin")
.args(args)
.spawn()
.unwrap();
child.wait().unwrap();
()
}
pub async fn run(path: &str, args: &[&str]) -> AsyncChild {
AsyncCommand::new(path)
.env("PATH", "/sbin:/bin:/usr/bin")
.args(args)
.stdout(Stdio::null())
.spawn()
.unwrap()
}
pub async fn run_wait(path: &str, args: &[&str]) {
let child = AsyncCommand::new(path)
.env("PATH", "/sbin:/bin:/usr/bin")
.args(args)
.spawn()
.unwrap();
child.await.unwrap();
()
}

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src/svc.rs Normal file
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use std::fs;
use serde::Deserialize;
use toml;
#[derive(Deserialize, Debug)]
pub struct Service {
pub name: String,
pub start: Start,
pub stop: Option<Stop>,
}
#[derive(Deserialize, Debug)]
pub struct Start {
pub command: String,
pub args: Vec<String>
}
#[derive(Deserialize, Debug)]
pub struct Stop {
pub command: String,
pub args: Vec<String>
}
pub fn get_services() -> Vec<Service> {
let mut services = Vec::new();
let paths = fs::read_dir("/etc/mini/").unwrap();
for path in paths {
// TODO: check ext
let svc_file_contents = fs::read_to_string(path.unwrap().path()).unwrap();
let svc : Service = toml::from_str(&svc_file_contents).unwrap();
services.push(svc);
}
services
}

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svc/networkmanager.toml Normal file
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name = 'NetworkManager'
[start]
command = 'NetworkManager'
args = []