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PowerShell2.0之Windows排错(三) 检查设备驱动

2011-01-18 15:51 by @天行健中国元素, ... 阅读, ... 评论, 收藏, 编辑

       设备驱动和服务功能类似,可以自动运行并提供一定功能。只是设备驱动更接近于硬件底层,并不像服务那样容易发现和检查。设备驱动一旦出现问题,往往伴随某种设备功能的失灵,所以对于系统管理员来说检查设备驱动也很重要。

创建用于检查硬件驱动的脚本CheckDeviceDrivers.ps1,其代码如下:

param($computer="localhost", $a="h", [switch]$help)

function funHelp()

{

$helpText=@"

DESCRIPTION:

NAME: CheckDeviceDrivers.ps1

Displays a listing of system drivers that are set to

automatic, manual, boot, system or all drivers

PARAMETERS:

-computer The name of the computer

-a(ction) < a(ll), r(unning), s(topped), b(oot),m(anual), au(to), sy(stem), h(elp) >

-help prints help file

SYNTAX:

CheckDeviceDrivers.ps1 -computer WebServer -a b

Displays a listing of all device drivers that are set to start on boot on a computer named WebServer

CheckDeviceDrivers.ps1 -a auto

Displays a listing of all device drivers on local computer set to start up automatically

CheckDeviceDrivers.ps1 -computer WebServer -a m

Displays a listing of all device drivers

that are set to start manually on a computer named WebServer

CheckDeviceDrivers.ps1 -help ?

Displays the help topic for the script

"@

$helpText

exit

}

if($help){ "Obtaining help ..." ; funhelp }

switch($a)

{

"a" {

"Retrieving all device drivers"

$filter = "started = 'true' or started = 'false'"

}

"r" {

"Retrieving all running device drivers"

$filter = "started = 'true'"

}

"s" {

"Retrieving all stopped device drivers"

$filter = "started = 'false'"

}

"b" {

"Retrieving boot device drivers"

$filter = "startmode = 'boot'"

}

"m" {

"Retrieving manual device drivers"

$filter = "startmode = 'manual'"

}

"au" {

"Retrieving auto device drivers"

$filter = "startmode = 'auto'"

}

"sy" {

"Retrieving system device drivers"

$filter = "startmode = 'system'"

}

"h" {

"You need to specify an action. The -a parameter is required"

"Try this: " + $MyInvocation.MyCommand.Definition + " -h"

exit

}

DEFAULT

{

"You need to specify an action. The -a parameter is required"

"Try this: " + $MyInvocation.MyCommand.Definition + " -h"

exit

}

}

$wmi = Get-WmiObject -Class win32_systemdriver `

-computername $computer -filter $filter

format-table -InputObject $wmi -property `

displayname, pathname, name -autosize

该脚本通过param语句定义了-computer,-a和-help参数。其中-a指定要执行的操作,默认为h,即显示帮助信息。

该脚本通过switch语句定义了主要操作的业务逻辑,允许用户指定一系列不同且相关的设备驱动。switch语句显示一条当前操作状态信息,然后通过设定$filter变量值,为Get-WmiObject cmdlet创建filter(筛选)参数。

该脚本中调用了可以在多个switch语句中使用的$MyInvocation.MyCommand.Definition命令,用于在输出信息中引用正在运行的脚本。其核心功能是通过Get-WmiObject cmdlet查询Win32_SystemDriver WMI类,通过指定$computer变量查询指定的计算机,然后可以使用通过switch语句创建的筛选器并将查询结果保存在$wmi变量中。为了在输出时格式化该变量,使用了带-InputObject参数的Format-Table cmdlet。同时保存$wmi变量中的management对象,执行结果如图1所示。

image

图1 执行结果

 

作者: 付海军
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