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doc: expand fs.access() mode parameter docs
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This commit expands the documentation for the mode parameter
passed to the fs.access() family of functions.

PR-URL: nodejs#41484
Refs: libuv/libuv#3410
Reviewed-By: Richard Lau
Reviewed-By: Luigi Pinca
Reviewed-By: Tobias Nießen
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cjihrig authored and thedull committed Jan 18, 2022
1 parent ce547e8 commit f6a667b
Showing 1 changed file with 22 additions and 19 deletions.
41 changes: 22 additions & 19 deletions doc/api/fs.md
Original file line number Diff line number Diff line change
Expand Up @@ -738,9 +738,11 @@ added: v10.0.0
Tests a user's permissions for the file or directory specified by `path`.
The `mode` argument is an optional integer that specifies the accessibility
checks to be performed. Check [File access constants][] for possible values
of `mode`. It is possible to create a mask consisting of the bitwise OR of
two or more values (e.g. `fs.constants.W_OK | fs.constants.R_OK`).
checks to be performed. `mode` should be either the value `fs.constants.F_OK`
or a mask consisting of the bitwise OR of any of `fs.constants.R_OK`,
`fs.constants.W_OK`, and `fs.constants.X_OK` (e.g.
`fs.constants.W_OK | fs.constants.R_OK`). Check [File access constants][] for
possible values of `mode`.
If the accessibility check is successful, the promise is resolved with no
value. If any of the accessibility checks fail, the promise is rejected
Expand Down Expand Up @@ -1616,9 +1618,11 @@ changes:
Tests a user's permissions for the file or directory specified by `path`.
The `mode` argument is an optional integer that specifies the accessibility
checks to be performed. Check [File access constants][] for possible values
of `mode`. It is possible to create a mask consisting of the bitwise OR of
two or more values (e.g. `fs.constants.W_OK | fs.constants.R_OK`).
checks to be performed. `mode` should be either the value `fs.constants.F_OK`
or a mask consisting of the bitwise OR of any of `fs.constants.R_OK`,
`fs.constants.W_OK`, and `fs.constants.X_OK` (e.g.
`fs.constants.W_OK | fs.constants.R_OK`). Check [File access constants][] for
possible values of `mode`.
The final argument, `callback`, is a callback function that is invoked with
a possible error argument. If any of the accessibility checks fail, the error
Expand All @@ -1645,14 +1649,9 @@ access(file, constants.W_OK, (err) => {
console.log(`${file} ${err ? 'is not writable' : 'is writable'}`);
});
// Check if the file exists in the current directory, and if it is writable.
access(file, constants.F_OK | constants.W_OK, (err) => {
if (err) {
console.error(
`${file} ${err.code === 'ENOENT' ? 'does not exist' : 'is read-only'}`);
} else {
console.log(`${file} exists, and it is writable`);
}
// Check if the file is readable and writable.
access(file, constants.R_OK | constants.W_OK, (err) => {
console.log(`${file} ${err ? 'is not' : 'is'} readable and writable`);
});
```
Expand Down Expand Up @@ -4459,10 +4458,11 @@ changes:
Synchronously tests a user's permissions for the file or directory specified
by `path`. The `mode` argument is an optional integer that specifies the
accessibility checks to be performed. Check [File access constants][] for
possible values of `mode`. It is possible to create a mask consisting of
the bitwise OR of two or more values
(e.g. `fs.constants.W_OK | fs.constants.R_OK`).
accessibility checks to be performed. `mode` should be either the value
`fs.constants.F_OK` or a mask consisting of the bitwise OR of any of
`fs.constants.R_OK`, `fs.constants.W_OK`, and `fs.constants.X_OK` (e.g.
`fs.constants.W_OK | fs.constants.R_OK`). Check [File access constants][] for
possible values of `mode`.
If any of the accessibility checks fail, an `Error` will be thrown. Otherwise,
the method will return `undefined`.
Expand Down Expand Up @@ -6579,7 +6579,8 @@ open('/path/to/my/file', O_RDWR | O_CREAT | O_EXCL, (err, fd) => {
##### File access constants
The following constants are meant for use with [`fs.access()`][].
The following constants are meant for use as the `mode` parameter passed to
[`fsPromises.access()`][], [`fs.access()`][], and [`fs.accessSync()`][].
<table>
<tr>
Expand Down Expand Up @@ -7258,6 +7259,7 @@ the file contents.
[`event ports`]: https://illumos.org/man/port_create
[`filehandle.writeFile()`]: #filehandlewritefiledata-options
[`fs.access()`]: #fsaccesspath-mode-callback
[`fs.accessSync()`]: #fsaccesssyncpath-mode
[`fs.chmod()`]: #fschmodpath-mode-callback
[`fs.chown()`]: #fschownpath-uid-gid-callback
[`fs.copyFile()`]: #fscopyfilesrc-dest-mode-callback
Expand Down Expand Up @@ -7292,6 +7294,7 @@ the file contents.
[`fs.write(fd, string...)`]: #fswritefd-string-position-encoding-callback
[`fs.writeFile()`]: #fswritefilefile-data-options-callback
[`fs.writev()`]: #fswritevfd-buffers-position-callback
[`fsPromises.access()`]: #fspromisesaccesspath-mode
[`fsPromises.open()`]: #fspromisesopenpath-flags-mode
[`fsPromises.opendir()`]: #fspromisesopendirpath-options
[`fsPromises.rm()`]: #fspromisesrmpath-options
Expand Down

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