Function read

crates/vm/src/stdlib/os.rs:286–301

(fd: crt_fd::Borrowed<'_>, n: usize, vm: &VirtualMachine)

    #[pyfunction]
    fn read(fd: crt_fd::Borrowed<'_>, n: usize, vm: &VirtualMachine) -> PyResult<PyBytesRef> {
        let mut buffer = vec![0u8; n];
        loop {
            match vm.allow_threads(|| crt_fd::read(fd, &mut buffer)) {
                Ok(n) => {
                    buffer.truncate(n);
                    return Ok(vm.ctx.new_bytes(buffer));
                }
                Err(e) if e.raw_os_error() == Some(libc::EINTR) => {
                    vm.check_signals()?;
                    continue;
                }
                Err(e) => return Err(e.into_pyexception(vm)),
            }
        }
    }

    #[pyfunction]
    fn readinto(