Function read

crates/test-programs/src/bin/p2_cli_hostcall_fuel.rs:41–64

()

}

fn read() {
    let f = preopen()
        .open_at(
            PathFlags::empty(),
            "1mb",
            OpenFlags::empty(),
            DescriptorFlags::empty(),
        )
        .unwrap();

    // 0-length is ok
    f.read(0, 0).unwrap();

    // This isn't transferring data from the guest to the host, so this is ok.
    f.read(1 << 20, 0).unwrap();

    // Host shouldn't allocate based on what the guest asks for...
    f.read(u64::MAX, 0).unwrap();

    f.read_via_stream(0)
        .unwrap()
        .blocking_read(1 << 20)
        .unwrap();
}

fn write() {
    let f = preopen()