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'use strict';
const common = require('../common');
const fs = require('fs');
const path = require('path');
if (process.argv[2] === 'wasi-child') {
common.expectWarning('ExperimentalWarning',
'WASI is an experimental feature. This feature could ' +
'change at any time');
const { WASI } = require('wasi');
const wasmDir = path.join(__dirname, 'wasm');
const wasi = new WASI({
args: [],
env: process.env,
preopens: {
'/sandbox': process.argv[4]
}
});
const importObject = { wasi_unstable: wasi.wasiImport };
const modulePath = path.join(wasmDir, `${process.argv[3]}.wasm`);
const buffer = fs.readFileSync(modulePath);
(async () => {
const { instance } = await WebAssembly.instantiate(buffer, importObject);
wasi.start(instance);
})();
} else {
if (!common.canCreateSymLink()) {
common.skip('insufficient privileges');
}
const assert = require('assert');
const cp = require('child_process');
const tmpdir = require('../../test/common/tmpdir');
// Setup the sandbox environment.
tmpdir.refresh();
const sandbox = path.join(tmpdir.path, 'sandbox');
const sandboxedFile = path.join(sandbox, 'input.txt');
const externalFile = path.join(tmpdir.path, 'outside.txt');
const sandboxedDir = path.join(sandbox, 'subdir');
const sandboxedSymlink = path.join(sandboxedDir, 'input_link.txt');
const escapingSymlink = path.join(sandboxedDir, 'outside.txt');
const loopSymlink1 = path.join(sandboxedDir, 'loop1');
const loopSymlink2 = path.join(sandboxedDir, 'loop2');
fs.mkdirSync(sandbox);
fs.mkdirSync(sandboxedDir);
fs.writeFileSync(sandboxedFile, 'hello from input.txt', 'utf8');
fs.writeFileSync(externalFile, 'this should be inaccessible', 'utf8');
fs.symlinkSync(sandboxedFile, sandboxedSymlink, 'file');
fs.symlinkSync(externalFile, escapingSymlink, 'file');
fs.symlinkSync(loopSymlink2, loopSymlink1, 'file');
fs.symlinkSync(loopSymlink1, loopSymlink2, 'file');
function runWASI(options) {
console.log('executing', options.test);
const opts = { env: { ...process.env, NODE_DEBUG_NATIVE: 'wasi' } };
const child = cp.spawnSync(process.execPath, [
'--experimental-wasi-unstable-preview0',
'--experimental-wasm-bigint',
__filename,
'wasi-child',
options.test,
sandbox
], opts);
console.log(child.stderr.toString());
assert.strictEqual(child.status, 0);
assert.strictEqual(child.signal, null);
assert.strictEqual(child.stdout.toString(), options.stdout || '');
}
runWASI({ test: 'follow_symlink', stdout: 'hello from input.txt' });
runWASI({ test: 'symlink_escape' });
runWASI({ test: 'symlink_loop' });
}
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