//! Disposable three-descriptor block read and malformed-chain rejection.

use super::*;

pub fn run(boot: &BootData,
    allocator: &mut memory::FrameAllocator) -> Result<(), &'static str> {
    let mut disk = virtio_ro_turkfs::RoDisk::open(
        boot, allocator, "TURKOS/OS/K1485-GET")?;
    if disk.capacity() < 1 { return Err("k1485-empty-disk"); }
    disk.reject_cycle_without_publish()?;
    let mut sector = [0xa5u8; 512];
    disk.read(0, &mut sector)?;
    if sector.iter().any(|&byte| byte != 0) {
        return Err("k1485-read-data");
    }
    disk.close(allocator)?;
    write_line("TURKOS/OS/K1485-DESCRIPTORS: SELF-CYCLE=REJECTED GET=512 DATA=ZERO OWNERS=0 FRAMES=RETURNED");
    Ok(())
}