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'use strict';
const common = require('../common');
const assert = require('assert');
const fs = require('fs');
const path = require('path');
const exec = require('child_process').exec;
let async_completed = 0;
let async_expected = 0;
const unlink = [];
let skipSymlinks = false;
common.refreshTmpDir();
let root = '/';
let assertEqualPath = assert.strictEqual;
if (common.isWindows) {
// something like "C:\\"
root = process.cwd().substr(0, 3);
assertEqualPath = function(path_left, path_right, message) {
assert
.strictEqual(path_left.toLowerCase(), path_right.toLowerCase(), message);
};
// On Windows, creating symlinks requires admin privileges.
// We'll only try to run symlink test if we have enough privileges.
try {
exec('whoami /priv', function(err, o) {
if (err || !o.includes('SeCreateSymbolicLinkPrivilege')) {
skipSymlinks = true;
}
runTest();
});
} catch (er) {
// better safe than sorry
skipSymlinks = true;
process.nextTick(runTest);
}
} else {
process.nextTick(runTest);
}
function tmp(p) {
return path.join(common.tmpDir, p);
}
const targetsAbsDir = path.join(common.tmpDir, 'targets');
const tmpAbsDir = common.tmpDir;
// Set up targetsAbsDir and expected subdirectories
fs.mkdirSync(targetsAbsDir);
fs.mkdirSync(path.join(targetsAbsDir, 'nested-index'));
fs.mkdirSync(path.join(targetsAbsDir, 'nested-index', 'one'));
fs.mkdirSync(path.join(targetsAbsDir, 'nested-index', 'two'));
function asynctest(testBlock, args, callback, assertBlock) {
async_expected++;
testBlock.apply(testBlock, args.concat(function(err) {
let ignoreError = false;
if (assertBlock) {
try {
ignoreError = assertBlock.apply(assertBlock, arguments);
} catch (e) {
err = e;
}
}
async_completed++;
callback(ignoreError ? null : err);
}));
}
// sub-tests:
function test_simple_error_callback(cb) {
fs.realpath('/this/path/does/not/exist', common.mustCall(function(err, s) {
assert(err);
assert(!s);
cb();
}));
}
function test_simple_relative_symlink(callback) {
console.log('test_simple_relative_symlink');
if (skipSymlinks) {
common.skip('symlink test (no privs)');
return runNextTest();
}
const entry = common.tmpDir + '/symlink';
const expected = common.tmpDir + '/cycles/root.js';
[
[entry, '../' + common.tmpDirName + '/cycles/root.js']
].forEach(function(t) {
try { fs.unlinkSync(t[0]); } catch (e) {}
console.log('fs.symlinkSync(%j, %j, %j)', t[1], t[0], 'file');
fs.symlinkSync(t[1], t[0], 'file');
unlink.push(t[0]);
});
const result = fs.realpathSync(entry);
assertEqualPath(result, path.resolve(expected));
asynctest(fs.realpath, [entry], callback, function(err, result) {
assertEqualPath(result, path.resolve(expected));
});
}
function test_simple_absolute_symlink(callback) {
console.log('test_simple_absolute_symlink');
// this one should still run, even if skipSymlinks is set,
// because it uses a junction.
const type = skipSymlinks ? 'junction' : 'dir';
console.log('using type=%s', type);
const entry = tmpAbsDir + '/symlink';
const expected = common.fixturesDir + '/nested-index/one';
[
[entry, expected]
].forEach(function(t) {
try { fs.unlinkSync(t[0]); } catch (e) {}
console.error('fs.symlinkSync(%j, %j, %j)', t[1], t[0], type);
fs.symlinkSync(t[1], t[0], type);
unlink.push(t[0]);
});
const result = fs.realpathSync(entry);
assertEqualPath(result, path.resolve(expected));
asynctest(fs.realpath, [entry], callback, function(err, result) {
assertEqualPath(result, path.resolve(expected));
});
}
function test_deep_relative_file_symlink(callback) {
console.log('test_deep_relative_file_symlink');
if (skipSymlinks) {
common.skip('symlink test (no privs)');
return runNextTest();
}
const expected = path.join(common.fixturesDir, 'cycles', 'root.js');
const linkData1 = path
.relative(path.join(targetsAbsDir, 'nested-index', 'one'),
expected);
const linkPath1 = path.join(targetsAbsDir,
'nested-index', 'one', 'symlink1.js');
try { fs.unlinkSync(linkPath1); } catch (e) {}
fs.symlinkSync(linkData1, linkPath1, 'file');
const linkData2 = '../one/symlink1.js';
const entry = path.join(targetsAbsDir,
'nested-index', 'two', 'symlink1-b.js');
try { fs.unlinkSync(entry); } catch (e) {}
fs.symlinkSync(linkData2, entry, 'file');
unlink.push(linkPath1);
unlink.push(entry);
assertEqualPath(fs.realpathSync(entry), path.resolve(expected));
asynctest(fs.realpath, [entry], callback, function(err, result) {
assertEqualPath(result, path.resolve(expected));
});
}
function test_deep_relative_dir_symlink(callback) {
console.log('test_deep_relative_dir_symlink');
if (skipSymlinks) {
common.skip('symlink test (no privs)');
return runNextTest();
}
const expected = path.join(common.fixturesDir, 'cycles', 'folder');
const path1b = path.join(targetsAbsDir, 'nested-index', 'one');
const linkPath1b = path.join(path1b, 'symlink1-dir');
const linkData1b = path.relative(path1b, expected);
try { fs.unlinkSync(linkPath1b); } catch (e) {}
fs.symlinkSync(linkData1b, linkPath1b, 'dir');
const linkData2b = '../one/symlink1-dir';
const entry = path.join(targetsAbsDir,
'nested-index', 'two', 'symlink12-dir');
try { fs.unlinkSync(entry); } catch (e) {}
fs.symlinkSync(linkData2b, entry, 'dir');
unlink.push(linkPath1b);
unlink.push(entry);
assertEqualPath(fs.realpathSync(entry), path.resolve(expected));
asynctest(fs.realpath, [entry], callback, function(err, result) {
assertEqualPath(result, path.resolve(expected));
});
}
function test_cyclic_link_protection(callback) {
console.log('test_cyclic_link_protection');
if (skipSymlinks) {
common.skip('symlink test (no privs)');
return runNextTest();
}
const entry = common.tmpDir + '/cycles/realpath-3a';
[
[entry, '../cycles/realpath-3b'],
[common.tmpDir + '/cycles/realpath-3b', '../cycles/realpath-3c'],
[common.tmpDir + '/cycles/realpath-3c', '../cycles/realpath-3a']
].forEach(function(t) {
try { fs.unlinkSync(t[0]); } catch (e) {}
fs.symlinkSync(t[1], t[0], 'dir');
unlink.push(t[0]);
});
assert.throws(function() { fs.realpathSync(entry); });
asynctest(fs.realpath, [entry], callback, function(err, result) {
assert.ok(err && true);
return true;
});
}
function test_cyclic_link_overprotection(callback) {
console.log('test_cyclic_link_overprotection');
if (skipSymlinks) {
common.skip('symlink test (no privs)');
return runNextTest();
}
const cycles = common.tmpDir + '/cycles';
const expected = fs.realpathSync(cycles);
const folder = cycles + '/folder';
const link = folder + '/cycles';
let testPath = cycles;
testPath += '/folder/cycles'.repeat(10);
try { fs.unlinkSync(link); } catch (ex) {}
fs.symlinkSync(cycles, link, 'dir');
unlink.push(link);
assertEqualPath(fs.realpathSync(testPath), path.resolve(expected));
asynctest(fs.realpath, [testPath], callback, function(er, res) {
assertEqualPath(res, path.resolve(expected));
});
}
function test_relative_input_cwd(callback) {
console.log('test_relative_input_cwd');
if (skipSymlinks) {
common.skip('symlink test (no privs)');
return runNextTest();
}
// we need to calculate the relative path to the tmp dir from cwd
const entrydir = process.cwd();
const entry = path.relative(entrydir,
path.join(common.tmpDir + '/cycles/realpath-3a'));
const expected = common.tmpDir + '/cycles/root.js';
[
[entry, '../cycles/realpath-3b'],
[common.tmpDir + '/cycles/realpath-3b', '../cycles/realpath-3c'],
[common.tmpDir + '/cycles/realpath-3c', 'root.js']
].forEach(function(t) {
const fn = t[0];
console.error('fn=%j', fn);
try { fs.unlinkSync(fn); } catch (e) {}
const b = path.basename(t[1]);
const type = (b === 'root.js' ? 'file' : 'dir');
console.log('fs.symlinkSync(%j, %j, %j)', t[1], fn, type);
fs.symlinkSync(t[1], fn, 'file');
unlink.push(fn);
});
const origcwd = process.cwd();
process.chdir(entrydir);
assertEqualPath(fs.realpathSync(entry), path.resolve(expected));
asynctest(fs.realpath, [entry], callback, function(err, result) {
process.chdir(origcwd);
assertEqualPath(result, path.resolve(expected));
return true;
});
}
function test_deep_symlink_mix(callback) {
console.log('test_deep_symlink_mix');
if (common.isWindows) {
// This one is a mix of files and directories, and it's quite tricky
// to get the file/dir links sorted out correctly.
common.skip('symlink test (no privs)');
return runNextTest();
}
/*
/tmp/node-test-realpath-f1 -> $tmpDir/node-test-realpath-d1/foo
/tmp/node-test-realpath-d1 -> $tmpDir/node-test-realpath-d2
/tmp/node-test-realpath-d2/foo -> $tmpDir/node-test-realpath-f2
/tmp/node-test-realpath-f2
-> $tmpDir/targets/nested-index/one/realpath-c
$tmpDir/targets/nested-index/one/realpath-c
-> $tmpDir/targets/nested-index/two/realpath-c
$tmpDir/targets/nested-index/two/realpath-c -> $tmpDir/cycles/root.js
$tmpDir/targets/cycles/root.js (hard)
*/
const entry = tmp('node-test-realpath-f1');
try { fs.unlinkSync(tmp('node-test-realpath-d2/foo')); } catch (e) {}
try { fs.rmdirSync(tmp('node-test-realpath-d2')); } catch (e) {}
fs.mkdirSync(tmp('node-test-realpath-d2'), 0o700);
try {
[
[entry, common.tmpDir + '/node-test-realpath-d1/foo'],
[tmp('node-test-realpath-d1'),
common.tmpDir + '/node-test-realpath-d2'],
[tmp('node-test-realpath-d2/foo'), '../node-test-realpath-f2'],
[tmp('node-test-realpath-f2'), targetsAbsDir +
'/nested-index/one/realpath-c'],
[targetsAbsDir + '/nested-index/one/realpath-c', targetsAbsDir +
'/nested-index/two/realpath-c'],
[targetsAbsDir + '/nested-index/two/realpath-c',
common.tmpDir + '/cycles/root.js']
].forEach(function(t) {
try { fs.unlinkSync(t[0]); } catch (e) {}
fs.symlinkSync(t[1], t[0]);
unlink.push(t[0]);
});
} finally {
unlink.push(tmp('node-test-realpath-d2'));
}
const expected = tmpAbsDir + '/cycles/root.js';
assertEqualPath(fs.realpathSync(entry), path.resolve(expected));
asynctest(fs.realpath, [entry], callback, function(err, result) {
assertEqualPath(result, path.resolve(expected));
return true;
});
}
function test_non_symlinks(callback) {
console.log('test_non_symlinks');
const entrydir = path.dirname(tmpAbsDir);
const entry = tmpAbsDir.substr(entrydir.length + 1) + '/cycles/root.js';
const expected = tmpAbsDir + '/cycles/root.js';
const origcwd = process.cwd();
process.chdir(entrydir);
assertEqualPath(fs.realpathSync(entry), path.resolve(expected));
asynctest(fs.realpath, [entry], callback, function(err, result) {
process.chdir(origcwd);
assertEqualPath(result, path.resolve(expected));
return true;
});
}
const upone = path.join(process.cwd(), '..');
function test_escape_cwd(cb) {
console.log('test_escape_cwd');
asynctest(fs.realpath, ['..'], cb, function(er, uponeActual) {
assertEqualPath(upone, uponeActual,
'realpath("..") expected: ' + path.resolve(upone) +
' actual:' + uponeActual);
});
}
const uponeActual = fs.realpathSync('..');
assertEqualPath(upone, uponeActual,
'realpathSync("..") expected: ' + path.resolve(upone) +
' actual:' + uponeActual);
// going up with .. multiple times
// .
// `-- a/
// |-- b/
// | `-- e -> ..
// `-- d -> ..
// realpath(a/b/e/d/a/b/e/d/a) ==> a
function test_up_multiple(cb) {
console.error('test_up_multiple');
if (skipSymlinks) {
common.skip('symlink test (no privs)');
return runNextTest();
}
function cleanup() {
['a/b',
'a'
].forEach(function(folder) {
try { fs.rmdirSync(tmp(folder)); } catch (ex) {}
});
}
function setup() {
cleanup();
}
setup();
fs.mkdirSync(tmp('a'), 0o755);
fs.mkdirSync(tmp('a/b'), 0o755);
fs.symlinkSync('..', tmp('a/d'), 'dir');
unlink.push(tmp('a/d'));
fs.symlinkSync('..', tmp('a/b/e'), 'dir');
unlink.push(tmp('a/b/e'));
const abedabed = tmp('abedabed'.split('').join('/'));
const abedabed_real = tmp('');
const abedabeda = tmp('abedabeda'.split('').join('/'));
const abedabeda_real = tmp('a');
assertEqualPath(fs.realpathSync(abedabeda), abedabeda_real);
assertEqualPath(fs.realpathSync(abedabed), abedabed_real);
fs.realpath(abedabeda, function(er, real) {
assert.ifError(er);
assertEqualPath(abedabeda_real, real);
fs.realpath(abedabed, function(er, real) {
assert.ifError(er);
assertEqualPath(abedabed_real, real);
cb();
cleanup();
});
});
}
// absolute symlinks with children.
// .
// `-- a/
// |-- b/
// | `-- c/
// | `-- x.txt
// `-- link -> /tmp/node-test-realpath-abs-kids/a/b/
// realpath(root+'/a/link/c/x.txt') ==> root+'/a/b/c/x.txt'
function test_abs_with_kids(cb) {
console.log('test_abs_with_kids');
// this one should still run, even if skipSymlinks is set,
// because it uses a junction.
const type = skipSymlinks ? 'junction' : 'dir';
console.log('using type=%s', type);
const root = tmpAbsDir + '/node-test-realpath-abs-kids';
function cleanup() {
['/a/b/c/x.txt',
'/a/link'
].forEach(function(file) {
try { fs.unlinkSync(root + file); } catch (ex) {}
});
['/a/b/c',
'/a/b',
'/a',
''
].forEach(function(folder) {
try { fs.rmdirSync(root + folder); } catch (ex) {}
});
}
function setup() {
cleanup();
['',
'/a',
'/a/b',
'/a/b/c'
].forEach(function(folder) {
console.log('mkdir ' + root + folder);
fs.mkdirSync(root + folder, 0o700);
});
fs.writeFileSync(root + '/a/b/c/x.txt', 'foo');
fs.symlinkSync(root + '/a/b', root + '/a/link', type);
}
setup();
const linkPath = root + '/a/link/c/x.txt';
const expectPath = root + '/a/b/c/x.txt';
const actual = fs.realpathSync(linkPath);
// console.log({link:linkPath,expect:expectPath,actual:actual},'sync');
assertEqualPath(actual, path.resolve(expectPath));
asynctest(fs.realpath, [linkPath], cb, function(er, actual) {
// console.log({link:linkPath,expect:expectPath,actual:actual},'async');
assertEqualPath(actual, path.resolve(expectPath));
cleanup();
});
}
// ----------------------------------------------------------------------------
const tests = [
test_simple_error_callback,
test_simple_relative_symlink,
test_simple_absolute_symlink,
test_deep_relative_file_symlink,
test_deep_relative_dir_symlink,
test_cyclic_link_protection,
test_cyclic_link_overprotection,
test_relative_input_cwd,
test_deep_symlink_mix,
test_non_symlinks,
test_escape_cwd,
test_abs_with_kids,
test_up_multiple
];
const numtests = tests.length;
let testsRun = 0;
function runNextTest(err) {
assert.ifError(err);
const test = tests.shift();
if (!test) {
return console.log(numtests +
' subtests completed OK for fs.realpath');
}
testsRun++;
test(runNextTest);
}
assertEqualPath(root, fs.realpathSync('/'));
fs.realpath('/', function(err, result) {
assert.ifError(err);
assertEqualPath(root, result);
});
function runTest() {
const tmpDirs = ['cycles', 'cycles/folder'];
tmpDirs.forEach(function(t) {
t = tmp(t);
fs.mkdirSync(t, 0o700);
});
fs.writeFileSync(tmp('cycles/root.js'), "console.error('roooot!');");
console.error('start tests');
runNextTest();
}
process.on('exit', function() {
assert.strictEqual(numtests, testsRun);
assert.strictEqual(async_completed, async_expected);
});