1// Copyright Joyent, Inc. and other Node contributors.
2//
3// Permission is hereby granted, free of charge, to any person obtaining a
4// copy of this software and associated documentation files (the
5// "Software"), to deal in the Software without restriction, including
6// without limitation the rights to use, copy, modify, merge, publish,
7// distribute, sublicense, and/or sell copies of the Software, and to permit
8// persons to whom the Software is furnished to do so, subject to the
9// following conditions:
10//
11// The above copyright notice and this permission notice shall be included
12// in all copies or substantial portions of the Software.
13//
14// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
17// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
18// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20// USE OR OTHER DEALINGS IN THE SOFTWARE.
21
22'use strict';
23const common = require('../common');
24
25const assert = require('assert');
26const fs = require('fs');
27const path = require('path');
28
29const tmpdir = require('../common/tmpdir');
30tmpdir.refresh();
31
32try {
33
34  const filepath = path.join(tmpdir.path, 'large.txt');
35  const fd = fs.openSync(filepath, 'w+');
36  const offset = 5 * 1024 * 1024 * 1024; // 5GB
37  const message = 'Large File';
38
39  fs.ftruncateSync(fd, offset);
40  assert.strictEqual(fs.statSync(filepath).size, offset);
41  const writeBuf = Buffer.from(message);
42  fs.writeSync(fd, writeBuf, 0, writeBuf.length, offset);
43  const readBuf = Buffer.allocUnsafe(writeBuf.length);
44  fs.readSync(fd, readBuf, 0, readBuf.length, offset);
45  assert.strictEqual(readBuf.toString(), message);
46  fs.readSync(fd, readBuf, 0, 1, 0);
47  assert.strictEqual(readBuf[0], 0);
48
49  // Verify that floating point positions do not throw.
50  fs.writeSync(fd, writeBuf, 0, writeBuf.length, 42.000001);
51  fs.close(fd, common.mustCall());
52} catch (e) {
53  if (e.code !== 'ENOSPC') {
54    throw e;
55  }
56  common.skip('insufficient disk space');
57}
58