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| /************************************************************************************************************
* registry.js - contains a wrapper for the REG command under Windows, which provides access to the registry
*
* @author Paul Bottin a/k/a FrEsC
*
*/
/* imports */
var util = require('util')
, path = require('path')
, spawn = require('child_process').spawn
/* set to console.log for debugging */
, log = function () {}
/* registry hive ids */
, HKLM = 'HKLM'
, HKCU = 'HKCU'
, HKCR = 'HKCR'
, HKU = 'HKU'
, HKCC = 'HKCC'
, HIVES = [ HKLM, HKCU, HKCR, HKU, HKCC ]
/* registry value type ids */
, REG_SZ = 'REG_SZ'
, REG_MULTI_SZ = 'REG_MULTI_SZ'
, REG_EXPAND_SZ = 'REG_EXPAND_SZ'
, REG_DWORD = 'REG_DWORD'
, REG_QWORD = 'REG_QWORD'
, REG_BINARY = 'REG_BINARY'
, REG_NONE = 'REG_NONE'
, REG_TYPES = [ REG_SZ, REG_MULTI_SZ, REG_EXPAND_SZ, REG_DWORD, REG_QWORD, REG_BINARY, REG_NONE ]
/* default registry value name */
, DEFAULT_VALUE = ''
/* general key pattern */
, KEY_PATTERN = /(\\[a-zA-Z0-9_\s]+)*/
/* key path pattern (as returned by REG-cli) */
, PATH_PATTERN = /^(HKEY_LOCAL_MACHINE|HKEY_CURRENT_USER|HKEY_CLASSES_ROOT|HKEY_USERS|HKEY_CURRENT_CONFIG)(.*)$/
/* registry item pattern */
, ITEM_PATTERN = /^(.*)\s(REG_SZ|REG_MULTI_SZ|REG_EXPAND_SZ|REG_DWORD|REG_QWORD|REG_BINARY|REG_NONE)\s+([^\s].*)$/
/**
* Creates an Error object that contains the exit code of the REG.EXE process.
* This contructor is private. Objects of this type are created internally and returned in the <code>err</code> parameters in case the REG.EXE process doesn't exit cleanly.
*
* @private
* @class
*
* @param {string} message - the error message
* @param {number} code - the process exit code
*
*/
function ProcessUncleanExitError(message, code) {
if (!(this instanceof ProcessUncleanExitError))
return new ProcessUncleanExitError(message, code);
Error.captureStackTrace(this, ProcessUncleanExitError);
/**
* The error name.
* @readonly
* @member {string} ProcessUncleanExitError#name
*/
this.__defineGetter__('name', function () { return ProcessUncleanExitError.name; });
/**
* The error message.
* @readonly
* @member {string} ProcessUncleanExitError#message
*/
this.__defineGetter__('message', function () { return message; });
/**
* The process exit code.
* @readonly
* @member {number} ProcessUncleanExitError#code
*/
this.__defineGetter__('code', function () { return code; });
}
util.inherits(ProcessUncleanExitError, Error);
/*
* Captures stdout/stderr for a child process
*/
function captureOutput(child) {
// Use a mutable data structure so we can append as we get new data and have
// the calling context see the new data
var output = {'stdout': '', 'stderr': ''};
child.stdout.on('data', function(data) { output["stdout"] += data.toString(); });
child.stderr.on('data', function(data) { output["stderr"] += data.toString(); });
return output;
}
/*
* Returns an error message containing the stdout/stderr of the child process
*/
function mkErrorMsg(registryCommand, code, output) {
var stdout = output['stdout'].trim();
var stderr = output['stderr'].trim();
var msg = util.format("%s command exited with code %d:\n%s\n%s", registryCommand, code, stdout, stderr);
return new ProcessUncleanExitError(msg, code);
}
/*
* Converts x86/x64 to 32/64
*/
function convertArchString(archString) {
if (archString == 'x64') {
return '64';
} else if (archString == 'x86') {
return '32';
} else {
throw new Error('illegal architecture: ' + archString + ' (use x86 or x64)');
}
}
/*
* Adds correct architecture to reg args
*/
function pushArch(args, arch) {
if (arch) {
args.push('/reg:' + convertArchString(arch));
}
}
/*
* Get the path to system's reg.exe. Useful when another reg.exe is added to the PATH
* Implemented only for Windows
*/
function getRegExePath() {
if (process.platform === 'win32') {
return path.join(process.env.windir, 'system32', 'reg.exe');
} else {
return "REG";
}
}
/**
* Creates a single registry value record.
* This contructor is private. Objects of this type are created internally and returned by methods of {@link Registry} objects.
*
* @private
* @class
*
* @param {string} host - the hostname
* @param {string} hive - the hive id
* @param {string} key - the registry key
* @param {string} name - the value name
* @param {string} type - the value type
* @param {string} value - the value
* @param {string} arch - the hive architecture ('x86' or 'x64')
*
*/
function RegistryItem (host, hive, key, name, type, value, arch) {
if (!(this instanceof RegistryItem))
return new RegistryItem(host, hive, key, name, type, value, arch);
/* private members */
var _host = host // hostname
, _hive = hive // registry hive
, _key = key // registry key
, _name = name // property name
, _type = type // property type
, _value = value // property value
, _arch = arch // hive architecture
/* getters/setters */
/**
* The hostname.
* @readonly
* @member {string} RegistryItem#host
*/
this.__defineGetter__('host', function () { return _host; });
/**
* The hive id.
* @readonly
* @member {string} RegistryItem#hive
*/
this.__defineGetter__('hive', function () { return _hive; });
/**
* The registry key.
* @readonly
* @member {string} RegistryItem#key
*/
this.__defineGetter__('key', function () { return _key; });
/**
* The value name.
* @readonly
* @member {string} RegistryItem#name
*/
this.__defineGetter__('name', function () { return _name; });
/**
* The value type.
* @readonly
* @member {string} RegistryItem#type
*/
this.__defineGetter__('type', function () { return _type; });
/**
* The value.
* @readonly
* @member {string} RegistryItem#value
*/
this.__defineGetter__('value', function () { return _value; });
/**
* The hive architecture.
* @readonly
* @member {string} RegistryItem#arch
*/
this.__defineGetter__('arch', function () { return _arch; });
}
util.inherits(RegistryItem, Object);
/**
* Creates a registry object, which provides access to a single registry key.
* Note: This class is returned by a call to ```require('winreg')```.
*
* @public
* @class
*
* @param {object} options - the options
* @param {string=} options.host - the hostname
* @param {string=} options.hive - the hive id
* @param {string=} options.key - the registry key
* @param {string=} options.arch - the optional registry hive architecture ('x86' or 'x64'; only valid on Windows 64 Bit Operating Systems)
*
* @example
* var Registry = require('winreg')
* , autoStartCurrentUser = new Registry({
* hive: Registry.HKCU,
* key: '\\Software\\Microsoft\\Windows\\CurrentVersion\\Run'
* });
*
*/
function Registry (options) {
if (!(this instanceof Registry))
return new Registry(options);
/* private members */
var _options = options || {}
, _host = '' + (_options.host || '') // hostname
, _hive = '' + (_options.hive || HKLM) // registry hive
, _key = '' + (_options.key || '') // registry key
, _arch = _options.arch || null // hive architecture
/* getters/setters */
/**
* The hostname.
* @readonly
* @member {string} Registry#host
*/
this.__defineGetter__('host', function () { return _host; });
/**
* The hive id.
* @readonly
* @member {string} Registry#hive
*/
this.__defineGetter__('hive', function () { return _hive; });
/**
* The registry key name.
* @readonly
* @member {string} Registry#key
*/
this.__defineGetter__('key', function () { return _key; });
/**
* The full path to the registry key.
* @readonly
* @member {string} Registry#path
*/
this.__defineGetter__('path', function () { return (_host.length == 0 ? '' : '\\\\' + host + '\\') + _hive + _key; });
/**
* The registry hive architecture ('x86' or 'x64').
* @readonly
* @member {string} Registry#arch
*/
this.__defineGetter__('arch', function () { return _arch; });
/**
* Creates a new {@link Registry} instance that points to the parent registry key.
* @readonly
* @member {Registry} Registry#parent
*/
this.__defineGetter__('parent', function () {
var i = _key.lastIndexOf('\\')
return new Registry({
host: this.host,
hive: this.hive,
key: (i == -1)?'':_key.substring(0, i),
arch: this.arch
});
});
// validate options...
if (HIVES.indexOf(_hive) == -1)
throw new Error('illegal hive specified.');
if (!KEY_PATTERN.test(_key))
throw new Error('illegal key specified.');
if (_arch && _arch != 'x64' && _arch != 'x86')
throw new Error('illegal architecture specified (use x86 or x64)');
}
/**
* Registry hive key HKEY_LOCAL_MACHINE.
* Note: For writing to this hive your program has to run with admin privileges.
* @type {string}
*/
Registry.HKLM = HKLM;
/**
* Registry hive key HKEY_CURRENT_USER.
* @type {string}
*/
Registry.HKCU = HKCU;
/**
* Registry hive key HKEY_CLASSES_ROOT.
* Note: For writing to this hive your program has to run with admin privileges.
* @type {string}
*/
Registry.HKCR = HKCR;
/**
* Registry hive key HKEY_USERS.
* Note: For writing to this hive your program has to run with admin privileges.
* @type {string}
*/
Registry.HKU = HKU;
/**
* Registry hive key HKEY_CURRENT_CONFIG.
* Note: For writing to this hive your program has to run with admin privileges.
* @type {string}
*/
Registry.HKCC = HKCC;
/**
* Collection of available registry hive keys.
* @type {array}
*/
Registry.HIVES = HIVES;
/**
* Registry value type STRING.
* @type {string}
*/
Registry.REG_SZ = REG_SZ;
/**
* Registry value type MULTILINE_STRING.
* @type {string}
*/
Registry.REG_MULTI_SZ = REG_MULTI_SZ;
/**
* Registry value type EXPANDABLE_STRING.
* @type {string}
*/
Registry.REG_EXPAND_SZ = REG_EXPAND_SZ;
/**
* Registry value type DOUBLE_WORD.
* @type {string}
*/
Registry.REG_DWORD = REG_DWORD;
/**
* Registry value type QUAD_WORD.
* @type {string}
*/
Registry.REG_QWORD = REG_QWORD;
/**
* Registry value type BINARY.
* @type {string}
*/
Registry.REG_BINARY = REG_BINARY;
/**
* Registry value type UNKNOWN.
* @type {string}
*/
Registry.REG_NONE = REG_NONE;
/**
* Collection of available registry value types.
* @type {array}
*/
Registry.REG_TYPES = REG_TYPES;
/**
* The name of the default value. May be used instead of the empty string literal for better readability.
* @type {string}
*/
Registry.DEFAULT_VALUE = DEFAULT_VALUE;
/**
* Retrieve all values from this registry key.
* @param {valuesCallback} cb - callback function
* @param {ProcessUncleanExitError=} cb.err - error object or null if successful
* @param {array=} cb.items - an array of {@link RegistryItem} objects
* @returns {Registry} this registry key object
*/
Registry.prototype.values = function values (cb) {
if (typeof cb !== 'function')
throw new TypeError('must specify a callback');
var args = [ 'QUERY', this.path ];
pushArch(args, this.arch);
var proc = spawn(getRegExePath(), args, {
cwd: undefined,
env: process.env,
stdio: [ 'ignore', 'pipe', 'pipe' ]
})
, buffer = ''
, self = this
, error = null // null means no error previously reported.
var output = captureOutput(proc);
proc.on('close', function (code) {
if (error) {
return;
} else if (code !== 0) {
log('process exited with code ' + code);
cb(mkErrorMsg('QUERY', code, output), null);
} else {
var items = []
, result = []
, lines = buffer.split('\n')
, lineNumber = 0
for (var i = 0, l = lines.length; i < l; i++) {
var line = lines[i].trim();
if (line.length > 0) {
log(line);
if (lineNumber != 0) {
items.push(line);
}
++lineNumber;
}
}
for (var i = 0, l = items.length; i < l; i++) {
var match = ITEM_PATTERN.exec(items[i])
, name
, type
, value
if (match) {
name = match[1].trim();
type = match[2].trim();
value = match[3];
result.push(new RegistryItem(self.host, self.hive, self.key, name, type, value, self.arch));
}
}
cb(null, result);
}
});
proc.stdout.on('data', function (data) {
buffer += data.toString();
});
proc.on('error', function(err) {
error = err;
cb(err);
});
return this;
};
/**
* Retrieve all subkeys from this registry key.
* @param {function (err, items)} cb - callback function
* @param {ProcessUncleanExitError=} cb.err - error object or null if successful
* @param {array=} cb.items - an array of {@link Registry} objects
* @returns {Registry} this registry key object
*/
Registry.prototype.keys = function keys (cb) {
if (typeof cb !== 'function')
throw new TypeError('must specify a callback');
var args = [ 'QUERY', this.path ];
pushArch(args, this.arch);
var proc = spawn(getRegExePath(), args, {
cwd: undefined,
env: process.env,
stdio: [ 'ignore', 'pipe', 'pipe' ]
})
, buffer = ''
, self = this
, error = null // null means no error previously reported.
var output = captureOutput(proc);
proc.on('close', function (code) {
if (error) {
return;
} else if (code !== 0) {
log('process exited with code ' + code);
cb(mkErrorMsg('QUERY', code, output), null);
}
});
proc.stdout.on('data', function (data) {
buffer += data.toString();
});
proc.stdout.on('end', function () {
var items = []
, result = []
, lines = buffer.split('\n')
for (var i = 0, l = lines.length; i < l; i++) {
var line = lines[i].trim();
if (line.length > 0) {
log(line);
items.push(line);
}
}
for (var i = 0, l = items.length; i < l; i++) {
var match = PATH_PATTERN.exec(items[i])
, hive
, key
if (match) {
hive = match[1];
key = match[2];
if (key && (key !== self.key)) {
result.push(new Registry({
host: self.host,
hive: self.hive,
key: key,
arch: self.arch
}));
}
}
}
cb(null, result);
});
proc.on('error', function(err) {
error = err;
cb(err);
});
return this;
};
/**
* Gets a named value from this registry key.
* @param {string} name - the value name, use {@link Registry.DEFAULT_VALUE} or an empty string for the default value
* @param {function (err, item)} cb - callback function
* @param {ProcessUncleanExitError=} cb.err - error object or null if successful
* @param {RegistryItem=} cb.item - the retrieved registry item
* @returns {Registry} this registry key object
*/
Registry.prototype.get = function get (name, cb) {
if (typeof cb !== 'function')
throw new TypeError('must specify a callback');
var args = ['QUERY', this.path];
if (name == '')
args.push('/ve');
else
args = args.concat(['/v', name]);
pushArch(args, this.arch);
var proc = spawn(getRegExePath(), args, {
cwd: undefined,
env: process.env,
stdio: [ 'ignore', 'pipe', 'pipe' ]
})
, buffer = ''
, self = this
, error = null // null means no error previously reported.
var output = captureOutput(proc);
proc.on('close', function (code) {
if (error) {
return;
} else if (code !== 0) {
log('process exited with code ' + code);
cb(mkErrorMsg('QUERY', code, output), null);
} else {
var items = []
, result = null
, lines = buffer.split('\n')
, lineNumber = 0
for (var i = 0, l = lines.length; i < l; i++) {
var line = lines[i].trim();
if (line.length > 0) {
log(line);
if (lineNumber != 0) {
items.push(line);
}
++lineNumber;
}
}
//Get last item - so it works in XP where REG QUERY returns with a header
var item = items[items.length-1] || ''
, match = ITEM_PATTERN.exec(item)
, name
, type
, value
if (match) {
name = match[1].trim();
type = match[2].trim();
value = match[3];
result = new RegistryItem(self.host, self.hive, self.key, name, type, value, self.arch);
}
cb(null, result);
}
});
proc.stdout.on('data', function (data) {
buffer += data.toString();
});
proc.on('error', function(err) {
error = err;
cb(err);
});
return this;
};
/**
* Sets a named value in this registry key, overwriting an already existing value.
* @param {string} name - the value name, use {@link Registry.DEFAULT_VALUE} or an empty string for the default value
* @param {string} type - the value type
* @param {string} value - the value
* @param {function (err)} cb - callback function
* @param {ProcessUncleanExitError=} cb.err - error object or null if successful
* @returns {Registry} this registry key object
*/
Registry.prototype.set = function set (name, type, value, cb) {
if (typeof cb !== 'function')
throw new TypeError('must specify a callback');
if (REG_TYPES.indexOf(type) == -1)
throw Error('illegal type specified.');
var args = ['ADD', this.path];
if (name == '')
args.push('/ve');
else
args = args.concat(['/v', name]);
args = args.concat(['/t', type, '/d', value, '/f']);
pushArch(args, this.arch);
var proc = spawn(getRegExePath(), args, {
cwd: undefined,
env: process.env,
stdio: [ 'ignore', 'pipe', 'pipe' ]
})
, error = null // null means no error previously reported.
var output = captureOutput(proc);
proc.on('close', function (code) {
if(error) {
return;
} else if (code !== 0) {
log('process exited with code ' + code);
cb(mkErrorMsg('ADD', code, output, null));
} else {
cb(null);
}
});
proc.stdout.on('data', function (data) {
// simply discard output
log(''+data);
});
proc.on('error', function(err) {
error = err;
cb(err);
});
return this;
};
/**
* Remove a named value from this registry key. If name is empty, sets the default value of this key.
* Note: This key must be already existing.
* @param {string} name - the value name, use {@link Registry.DEFAULT_VALUE} or an empty string for the default value
* @param {function (err)} cb - callback function
* @param {ProcessUncleanExitError=} cb.err - error object or null if successful
* @returns {Registry} this registry key object
*/
Registry.prototype.remove = function remove (name, cb) {
if (typeof cb !== 'function')
throw new TypeError('must specify a callback');
var args = name ? ['DELETE', this.path, '/f', '/v', name] : ['DELETE', this.path, '/f', '/ve'];
pushArch(args, this.arch);
var proc = spawn(getRegExePath(), args, {
cwd: undefined,
env: process.env,
stdio: [ 'ignore', 'pipe', 'pipe' ]
})
, error = null // null means no error previously reported.
var output = captureOutput(proc);
proc.on('close', function (code) {
if(error) {
return;
} else if (code !== 0) {
log('process exited with code ' + code);
cb(mkErrorMsg('DELETE', code, output), null);
} else {
cb(null);
}
});
proc.stdout.on('data', function (data) {
// simply discard output
log(''+data);
});
proc.on('error', function(err) {
error = err;
cb(err);
});
return this;
};
/**
* Remove all subkeys and values (including the default value) from this registry key.
* @param {function (err)} cb - callback function
* @param {ProcessUncleanExitError=} cb.err - error object or null if successful
* @returns {Registry} this registry key object
*/
Registry.prototype.clear = function clear (cb) {
if (typeof cb !== 'function')
throw new TypeError('must specify a callback');
var args = ['DELETE', this.path, '/f', '/va'];
pushArch(args, this.arch);
var proc = spawn(getRegExePath(), args, {
cwd: undefined,
env: process.env,
stdio: [ 'ignore', 'pipe', 'pipe' ]
})
, error = null // null means no error previously reported.
var output = captureOutput(proc);
proc.on('close', function (code) {
if(error) {
return;
} else if (code !== 0) {
log('process exited with code ' + code);
cb(mkErrorMsg("DELETE", code, output), null);
} else {
cb(null);
}
});
proc.stdout.on('data', function (data) {
// simply discard output
log(''+data);
});
proc.on('error', function(err) {
error = err;
cb(err);
});
return this;
};
/**
* Alias for the clear method to keep it backward compatible.
* @method
* @deprecated Use {@link Registry#clear} or {@link Registry#destroy} in favour of this method.
* @param {function (err)} cb - callback function
* @param {ProcessUncleanExitError=} cb.err - error object or null if successful
* @returns {Registry} this registry key object
*/
Registry.prototype.erase = Registry.prototype.clear;
/**
* Delete this key and all subkeys from the registry.
* @param {function (err)} cb - callback function
* @param {ProcessUncleanExitError=} cb.err - error object or null if successful
* @returns {Registry} this registry key object
*/
Registry.prototype.destroy = function destroy (cb) {
if (typeof cb !== 'function')
throw new TypeError('must specify a callback');
var args = ['DELETE', this.path, '/f'];
pushArch(args, this.arch);
var proc = spawn(getRegExePath(), args, {
cwd: undefined,
env: process.env,
stdio: [ 'ignore', 'pipe', 'pipe' ]
})
, error = null // null means no error previously reported.
var output = captureOutput(proc);
proc.on('close', function (code) {
if (error) {
return;
} else if (code !== 0) {
log('process exited with code ' + code);
cb(mkErrorMsg('DELETE', code, output), null);
} else {
cb(null);
}
});
proc.stdout.on('data', function (data) {
// simply discard output
log(''+data);
});
proc.on('error', function(err) {
error = err;
cb(err);
});
return this;
};
/**
* Create this registry key. Note that this is a no-op if the key already exists.
* @param {function (err)} cb - callback function
* @param {ProcessUncleanExitError=} cb.err - error object or null if successful
* @returns {Registry} this registry key object
*/
Registry.prototype.create = function create (cb) {
if (typeof cb !== 'function')
throw new TypeError('must specify a callback');
var args = ['ADD', this.path, '/f'];
pushArch(args, this.arch);
var proc = spawn(getRegExePath(), args, {
cwd: undefined,
env: process.env,
stdio: [ 'ignore', 'pipe', 'pipe' ]
})
, error = null // null means no error previously reported.
var output = captureOutput(proc);
proc.on('close', function (code) {
if (error) {
return;
} else if (code !== 0) {
log('process exited with code ' + code);
cb(mkErrorMsg('ADD', code, output), null);
} else {
cb(null);
}
});
proc.stdout.on('data', function (data) {
// simply discard output
log(''+data);
});
proc.on('error', function(err) {
error = err;
cb(err);
});
return this;
};
/**
* Checks if this key already exists.
* @param {function (err, exists)} cb - callback function
* @param {ProcessUncleanExitError=} cb.err - error object or null if successful
* @param {boolean=} cb.exists - true if a registry key with this name already exists
* @returns {Registry} this registry key object
*/
Registry.prototype.keyExists = function keyExists (cb) {
this.values(function (err, items) {
if (err) {
// process should return with code 1 if key not found
if (err.code == 1) {
return cb(null, false);
}
// other error
return cb(err);
}
cb(null, true);
});
return this;
};
/**
* Checks if a value with the given name already exists within this key.
* @param {string} name - the value name, use {@link Registry.DEFAULT_VALUE} or an empty string for the default value
* @param {function (err, exists)} cb - callback function
* @param {ProcessUncleanExitError=} cb.err - error object or null if successful
* @param {boolean=} cb.exists - true if a value with the given name was found in this key
* @returns {Registry} this registry key object
*/
Registry.prototype.valueExists = function valueExists (name, cb) {
this.get(name, function (err, item) {
if (err) {
// process should return with code 1 if value not found
if (err.code == 1) {
return cb(null, false);
}
// other error
return cb(err);
}
cb(null, true);
});
return this;
};
module.exports = Registry;
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