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Use syscall::Daemon

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This commit is contained in:
Jeremy Soller
2022-02-28 15:13:46 -07:00
parent 280bbcec2a
commit ca64072b38
2 changed files with 81 additions and 75 deletions
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Cargo.lock
Generated
+51 -51
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src/main.rs
+30 -24
View File
@@ -10,6 +10,7 @@ extern crate sha2;
use std::fs::File;
use std::io::{Read, Write};
use std::process;
use rand_chacha::ChaCha20Rng;
use rand_core::RngCore;
@@ -23,7 +24,7 @@ pub const MODE_READ: u16 = 0o4;
use raw_cpuid::CpuId;
use syscall::data::{Packet, Stat};
use syscall::flag::{CloneFlags, EventFlags};
use syscall::flag::EventFlags;
use syscall::{
Error, Result, SchemeMut, EBADF, EBADFD, EEXIST, EINVAL, ENOENT, EPERM, MODE_CHR, O_CLOEXEC,
O_CREAT, O_EXCL, O_RDONLY, O_RDWR, O_STAT, O_WRONLY,
@@ -395,34 +396,39 @@ impl SchemeMut for RandScheme {
}
}
fn main() {
// Daemonize
if unsafe { syscall::clone(CloneFlags::empty()).unwrap() } == 0 {
let socket = File::create(":rand").expect("rand: failed to create rand scheme");
fn daemon(daemon: syscall::Daemon) -> ! {
let socket = File::create(":rand").expect("randd: failed to create rand scheme");
let mut scheme = RandScheme::new(socket);
let mut scheme = RandScheme::new(socket);
syscall::setrens(0, 0).expect("randd: failed to enter null namespace");
daemon.ready().expect("randd: failed to mark daemon as ready");
loop {
let mut packet = Packet::default();
match scheme.socket.read(&mut packet) {
Ok(s) => {
if s == 0 {
break;
}
scheme.handle(&mut packet);
match scheme.socket.write(&packet) {
Err(e) => println!("Error writing packet {}", e),
_ => {}
}
syscall::setrens(0, 0).expect("randd: failed to enter null namespace");
loop {
let mut packet = Packet::default();
match scheme.socket.read(&mut packet) {
Ok(s) => {
if s == 0 {
break;
}
scheme.handle(&mut packet);
match scheme.socket.write(&packet) {
Err(e) => println!("Error writing packet {}", e),
_ => {}
}
Err(e) => println!("Error reading packet {}", e),
}
scheme
.socket
.write(&packet)
.expect("rand: failed to write responses to rand scheme");
Err(e) => println!("Error reading packet {}", e),
}
scheme
.socket
.write(&packet)
.expect("randd: failed to write responses to rand scheme");
}
process::exit(0);
}
fn main() {
syscall::Daemon::new(daemon).expect("randd: failed to daemonize");
}