Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 | 67x 67x 67x 67x 3188x 3188x 3188x 3188x 3188x 6392x 3256x 3256x 22x 14x 8x 3188x 3188x 3188x 3188x 3188x 3188x 63494x 2262x 2262x 2262x 930x 930x 2262x 2262x 4168x 4168x 4168x 4168x 4168x 2780x 2780x 4168x 4168x 4168x 105x 105x 34x 34x 105x 105x 105x 105x 15687x 15687x 2290x 477x 477x 647x 3196x | import { constants, PATH } from '../constants';
import { FanOut } from 'thingies/lib/fanout';
import type { Node } from './Node';
import type { Superblock } from './Superblock';
export type LinkEventChildAdd = [type: 'child:add', link: Link, parent: Link];
export type LinkEventChildDelete = [type: 'child:del', link: Link, parent: Link];
export type LinkEvent = LinkEventChildAdd | LinkEventChildDelete;
const { S_IFREG } = constants;
/**
* Represents a hard link that points to an i-node `node`.
*/
export class Link {
public readonly changes = new FanOut<LinkEvent>();
vol: Superblock;
parent: Link | undefined;
children = new Map<string, Link | undefined>();
// Path to this node as Array: ['usr', 'bin', 'node'].
private _steps: string[] = [];
// "i-node" of this hard link.
node: Node;
// "i-node" number of the node.
ino: number = 0;
// Number of children.
length: number = 0;
name: string;
get steps() {
return this._steps;
}
// Recursively sync children steps, e.g. in case of dir rename
set steps(val) {
this._steps = val;
for (const [child, link] of this.children.entries()) {
if (child === '.' || child === '..') {
continue;
}
link?.syncSteps();
}
}
constructor(vol: Superblock, parent: Link | undefined, name: string) {
this.vol = vol;
this.parent = parent;
this.name = name;
this.syncSteps();
}
setNode(node: Node) {
this.node = node;
this.ino = node.ino;
}
getNode(): Node {
return this.node;
}
createChild(name: string, node: Node = this.vol.createNode(S_IFREG | 0o666)): Link {
const link = new Link(this.vol, this, name);
link.setNode(node);
if (node.isDirectory()) {
link.children.set('.', link);
link.getNode().nlink++;
}
this.setChild(name, link);
return link;
}
setChild(name: string, link: Link = new Link(this.vol, this, name)): Link {
this.children.set(name, link);
link.parent = this;
this.length++;
const node = link.getNode();
if (node.isDirectory()) {
link.children.set('..', this);
this.getNode().nlink++;
}
this.getNode().mtime = new Date();
this.changes.emit(['child:add', link, this]);
return link;
}
deleteChild(link: Link) {
const node = link.getNode();
if (node.isDirectory()) {
link.children.delete('..');
this.getNode().nlink--;
}
this.children.delete(link.getName());
this.length--;
this.getNode().mtime = new Date();
this.changes.emit(['child:del', link, this]);
}
getChild(name: string): Link | undefined {
this.getNode().atime = new Date();
return this.children.get(name);
}
getPath(): string {
return this.steps.join(PATH.SEP);
}
getParentPath(): string {
const parent = this.steps.slice(0, -1).join(PATH.SEP);
return parent ? parent : PATH.SEP;
}
getName(): string {
return this.steps[this.steps.length - 1];
}
toJSON() {
return {
steps: this.steps,
ino: this.ino,
children: Array.from(this.children.keys()),
};
}
syncSteps() {
this.steps = this.parent ? this.parent.steps.concat([this.name]) : [this.name];
}
}
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