The book you need to succeed! Vbscript, jscript
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- Bu səhifədəki naviqasiya:
- Some of the scripts in this chapter are not fully working exam- ples. The scripts may only highlight the syntax of how the com
- Working with the Windows Registry
- IN THIS CHAPTER Understanding the Windows Registry Reading and writing Registry values Working with Windows event logs
- TABLE 12-1 Working with the Windows Registry and Event Logs Short Name Long Name Description
- For more information, see the section, “Managing WINS through Windows scripts.”
- Reading registry keys and values
- LISTING 12-1 Reading the Windows Registry VBScript readkey.vbs
86804c11.indd 230 86804c11.indd 230 1/21/09 1:26:39 PM 1/21/09 1:26:39 PM 231 T hrough Windows Script Host, you can manage the Windows Registry and the Windows event logs. The registry stores configuration infor- mation for the operating system, applications, services, and more. By examining and changing registry information in scripts, you can recon- figure a system so that it runs exactly the way you want it to. The event logs track essential processes on a system and can also be used in auditing sys- tem activity. By examining event logs through scripts, you can analyze system activity and monitor a system for problems. Some of the scripts in this chapter are not fully working exam- ples. The scripts may only highlight the syntax of how the com- mands could be used in a complete script. Also, you may need to replace registry paths with your own if you are trying the examples on your own computer. Working with the Windows Registry The Windows Registry stores configuration settings. Through Windows scripts, you can read, write, and delete registry entries. Because the registry is essential to the proper operation of the operating system, you should only make changes to the registry when you know how these changes will affect the system. Improperly modifying the Windows Registry can cause serious problems. If the registry gets corrupted, you may have to reinstall the oper- ating system. Always double-check registry scripts before running them, and make sure that they do exactly what you intend. NOTE NOTE Working with the Windows Registry and Event Logs IN THIS CHAPTER Understanding the Windows Registry Reading and writing Registry values Working with Windows event logs Reading and writing event logs 86804c12.indd 231 86804c12.indd 231 1/21/09 1:26:53 PM 1/21/09 1:26:53 PM 232 Part II Windows VBScript and JScript Before you edit the registry in any way, you should create or update the system’s existing emergency repair disk. This way, if you make a mistake, you can recover the registry and the system. Details on how to back up and restore the registry for Windows XP and Windows Vista can be found in Microsoft knowledgebase article 322756 (http://support.microsoft.com/kb/322756). Understanding the registry structure The registry stores configuration values for the operating system, applications, user settings, and more. Registry settings are stored as keys and values. These keys and values are placed under a spe- cific root key, which controls when and how the keys and values are used. The root keys are summarized in Table 12-1. This table also shows the short name by which you can reference the root key in a script. The three keys with short names are the ones you’ll work with most often. TABLE 12-1 Working with the Windows Registry and Event Logs Short Name Long Name Description HKCU HKEY_CURRENT_USER Controls configuration settings for the current user. HKLM HKEY_LOCAL_MACHINE Controls system-level configuration settings. HKCR HKEY_CLASSES_ROOT Configuration settings for applications and files. Ensures the correct application is opened when a file is started through Windows Explorer or OLE. - HKEY_USERS Stores default-user and other-user settings by profile. - HKEY_CURRENT_CONFIG Contains information about the hardware profile being used. Under the root keys, you’ll find the main keys that control system, user, and application settings. These keys are organized into a tree structure where folders represent keys. For example, under HKEY_CURRENT_USER\Software\Microsoft , you’ll find folders for all Microsoft applications installed by the current user. Under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\ Services , you’ll find folders for all services installed on the computer. These folders are officially referenced as keys. Through Windows scripts, you change the values of existing keys or you can assign values to new keys. Keys are designated by a folder path; for example: HKEY_LOCAL_MACHINE \SYSTEM \CurrentControlSet \Services \WINS \Parameters NOTE NOTE 86804c12.indd 232 86804c12.indd 232 1/21/09 1:26:53 PM 1/21/09 1:26:53 PM 233 Working with the Windows Registry and Event Logs 12 Here, the key is Parameters . This key has values associated with it. Key values have three compo- nents: a value name, a value type, and the actual value. In the following example, the value name is DbFileNm , the type is REG_EXPAND_SZ , and the actual value is %windir%\system32\wins\ wins.mdb : DbFileNm : REG_EXPAND_SZ : %windir%\system32\wins\wins.mdb The DbFileNm value controls the location of the WINS database on a Windows server. Another useful value for controlling WINS is LogFilePath, which controls the location of WINS log fi les on a Windows server. This value is written as: LogFilePath : REG_EXPAND_SZ : %windir%\system32\wins For more information, see the section, “Managing WINS through Windows scripts.” Key values are written by default as normal string values (type REG_SZ), but you can assign any of these data types: REG_BINARY ■ : Identifies a binary value. Binary values must be entered using base-2 (0 or 1 only). REG_SZ ■ : Identifies a string value containing a sequence of characters. REG_DWORD ■ : Identifies a DWORD value, which is composed of hexadecimal data with a maximum length of four bytes. REG_MULTI_SZ ■ : Identifies a multiple string value. REG_EXPAND_SZ ■ : Identifies an expandable string value, which is usually used with direc- tory paths. Reading registry keys and values You can read registry values by passing the full path and name of a key to the RegRead method of the WshShell object. RegRead then returns the value associated with the key. Listing 12-1 shows how you can read the DbFileNm value. LISTING 12-1 Reading the Windows Registry VBScript readkey.vbs Set ws = WScript.CreateObject(“WScript.Shell”) v=ws.RegRead(“HKLM\SYSTEM\CurrentControlSet\Services\WINS\Parameters\DbFileNm”) WScript.Echo v NOTE NOTE continued 86804c12.indd 233 86804c12.indd 233 1/21/09 1:26:54 PM 1/21/09 1:26:54 PM Yüklə 12,95 Mb. Dostları ilə paylaş:
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