Class NullFile

src/kernel/file.ts:249–292

}

export class NullFile implements IFile {
	fd:       number;
	pos:      number;

	refCount: number;

	constructor() {
		this.refCount = 1;
		this.pos = 0;
	}

	read(buf: Buffer, pos: number, cb: (err: any, len?: number) => void): void {
		cb(null, 0);
	}

	write(buf: Buffer, pos: number, cb: (err: any, len?: number) => void): void {
		cb(null, buf.length);
	}

	stat(cb: (err: any, stats: any) => void): void {
		cb(null, new Stats(FileType.FILE, 0, 0x309));
	}

	readdir(cb: (err: any, files: string[]) => void): void {
		setTimeout(cb, 0, 'cant readdir on /dev/null');
	}

	llseek(offhi: number, offlo: number, whence: number, cb: (err: number, off: number) => void): void {
		this.pos = 0;
		cb(0, this.pos);
	}

	ref(): void {
		this.refCount++;
	}

	unref(): void {
		this.refCount--;
		// FIXME: verify this is what we want.
		if (!this.refCount) {
			this.fd = undefined;
		}
	}
}