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// SPDX-License-Identifier: Apache-2.0
use std::fs::File;
use std::io::Read;
use std::io::Write;
use std::os::raw::c_int;
use std::os::unix::io::{FromRawFd, RawFd};
use ciborium::{de::from_reader, value::Value};
use rand::Rng;
const ITERATIONS: usize = 128 * 1024;
#[allow(non_camel_case_types)]
type pid_t = i32;
extern "C" {
fn close(fd: RawFd) -> c_int;
fn fork() -> pid_t;
fn pipe(pipefd: &mut [RawFd; 2]) -> c_int;
fn waitpid(pid: pid_t, wstatus: *mut c_int, options: c_int) -> pid_t;
}
#[test]
fn fuzz() {
let mut fds: [RawFd; 2] = [0; 2];
assert_eq!(unsafe { pipe(&mut fds) }, 0);
let pid = unsafe { fork() };
assert!(pid >= 0);
match pid {
0 => {
let mut child = unsafe { File::from_raw_fd(fds[1]) };
unsafe { close(fds[0]) };
let mut rng = rand::thread_rng();
let mut buffer = [0u8; 32];
for _ in 0..ITERATIONS {
let len = rng.gen_range(0..buffer.len());
rng.fill(&mut buffer[..len]);
writeln!(child, "{}", hex::encode(&buffer[..len])).unwrap();
writeln!(child, "{:?}", from_reader::<Value, _>(&buffer[..len])).unwrap();
}
}
pid => {
let mut parent = unsafe { File::from_raw_fd(fds[0]) };
unsafe { close(fds[1]) };
let mut string = String::new();
parent.read_to_string(&mut string).unwrap();
eprint!("{}", string);
let mut status = 0;
assert_eq!(pid, unsafe { waitpid(pid, &mut status, 0) });
eprintln!("exit status: {:?}", status);
assert_eq!(0, status);
}
}
}
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