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// Flags: --expose-internals
'use strict';
// This tests that fs.access and fs.accessSync works as expected
// and the errors thrown from these APIs include the desired properties
const common = require('../common');
if (!common.isWindows && process.getuid() === 0)
common.skip('as this test should not be run as `root`');
const assert = require('assert');
const fs = require('fs');
const path = require('path');
const { internalBinding } = require('internal/test/binding');
const { UV_ENOENT } = internalBinding('uv');
const tmpdir = require('../common/tmpdir');
const doesNotExist = path.join(tmpdir.path, '__this_should_not_exist');
const readOnlyFile = path.join(tmpdir.path, 'read_only_file');
const readWriteFile = path.join(tmpdir.path, 'read_write_file');
function createFileWithPerms(file, mode) {
fs.writeFileSync(file, '');
fs.chmodSync(file, mode);
}
tmpdir.refresh();
createFileWithPerms(readOnlyFile, 0o444);
createFileWithPerms(readWriteFile, 0o666);
/*
* On non-Windows supported platforms, fs.access(readOnlyFile, W_OK, ...)
* always succeeds if node runs as the super user, which is sometimes the
* case for tests running on our continuous testing platform agents.
*
* In this case, this test tries to change its process user id to a
* non-superuser user so that the test that checks for write access to a
* read-only file can be more meaningful.
*
* The change of user id is done after creating the fixtures files for the same
* reason: the test may be run as the superuser within a directory in which
* only the superuser can create files, and thus it may need superuser
* privileges to create them.
*
* There's not really any point in resetting the process' user id to 0 after
* changing it to 'nobody', since in the case that the test runs without
* superuser privilege, it is not possible to change its process user id to
* superuser.
*
* It can prevent the test from removing files created before the change of user
* id, but that's fine. In this case, it is the responsibility of the
* continuous integration platform to take care of that.
*/
let hasWriteAccessForReadonlyFile = false;
if (!common.isWindows && process.getuid() === 0) {
hasWriteAccessForReadonlyFile = true;
try {
process.setuid('nobody');
hasWriteAccessForReadonlyFile = false;
} catch {
}
}
assert.strictEqual(typeof fs.F_OK, 'number');
assert.strictEqual(typeof fs.R_OK, 'number');
assert.strictEqual(typeof fs.W_OK, 'number');
assert.strictEqual(typeof fs.X_OK, 'number');
const throwNextTick = (e) => { process.nextTick(() => { throw e; }); };
fs.access(__filename, common.mustCall(function(...args) {
assert.deepStrictEqual(args, [null]);
}));
fs.promises.access(__filename)
.then(common.mustCall())
.catch(throwNextTick);
fs.access(__filename, fs.R_OK, common.mustCall(function(...args) {
assert.deepStrictEqual(args, [null]);
}));
fs.promises.access(__filename, fs.R_OK)
.then(common.mustCall())
.catch(throwNextTick);
fs.access(readOnlyFile, fs.F_OK | fs.R_OK, common.mustCall(function(...args) {
assert.deepStrictEqual(args, [null]);
}));
fs.promises.access(readOnlyFile, fs.F_OK | fs.R_OK)
.then(common.mustCall())
.catch(throwNextTick);
{
const expectedError = (err) => {
assert.notStrictEqual(err, null);
assert.strictEqual(err.code, 'ENOENT');
assert.strictEqual(err.path, doesNotExist);
};
fs.access(doesNotExist, common.mustCall(expectedError));
fs.promises.access(doesNotExist)
.then(common.mustNotCall(), common.mustCall(expectedError))
.catch(throwNextTick);
}
{
function expectedError(err) {
assert.strictEqual(this, undefined);
if (hasWriteAccessForReadonlyFile) {
assert.ifError(err);
} else {
assert.notStrictEqual(err, null);
assert.strictEqual(err.path, readOnlyFile);
}
}
fs.access(readOnlyFile, fs.W_OK, common.mustCall(expectedError));
fs.promises.access(readOnlyFile, fs.W_OK)
.then(common.mustNotCall(), common.mustCall(expectedError))
.catch(throwNextTick);
}
{
const expectedError = (err) => {
assert.strictEqual(err.code, 'ERR_INVALID_ARG_TYPE');
assert.ok(err instanceof TypeError);
return true;
};
assert.throws(
() => { fs.access(100, fs.F_OK, common.mustNotCall()); },
expectedError
);
fs.promises.access(100, fs.F_OK)
.then(common.mustNotCall(), common.mustCall(expectedError))
.catch(throwNextTick);
}
common.expectsError(
() => {
fs.access(__filename, fs.F_OK);
},
{
code: 'ERR_INVALID_CALLBACK',
type: TypeError
});
common.expectsError(
() => {
fs.access(__filename, fs.F_OK, {});
},
{
code: 'ERR_INVALID_CALLBACK',
type: TypeError
});
// Regular access should not throw.
fs.accessSync(__filename);
const mode = fs.F_OK | fs.R_OK | fs.W_OK;
fs.accessSync(readWriteFile, mode);
assert.throws(
() => { fs.accessSync(doesNotExist); },
(err) => {
assert.strictEqual(err.code, 'ENOENT');
assert.strictEqual(err.path, doesNotExist);
assert.strictEqual(
err.message,
`ENOENT: no such file or directory, access '${doesNotExist}'`
);
assert.strictEqual(err.constructor, Error);
assert.strictEqual(err.syscall, 'access');
assert.strictEqual(err.errno, UV_ENOENT);
return true;
}
);
assert.throws(
() => { fs.accessSync(Buffer.from(doesNotExist)); },
(err) => {
assert.strictEqual(err.code, 'ENOENT');
assert.strictEqual(err.path, doesNotExist);
assert.strictEqual(
err.message,
`ENOENT: no such file or directory, access '${doesNotExist}'`
);
assert.strictEqual(err.constructor, Error);
assert.strictEqual(err.syscall, 'access');
assert.strictEqual(err.errno, UV_ENOENT);
return true;
}
);
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