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aku1 发表于 2006-6-22 11:22:51 |
要写windows脚本估计没有比Microsoft® Windows® 2000 Scripting Guide更好的书了 ：）
Scheduled tasks can save a great deal of work for administrators, especially if these tasks are well coordinated for minimal impact on users, computers, and the network. However, poorly planned scheduled tasks can cause a number of problems.
For example, if multiple tasks are scheduled to run at the same time, some tasks might interfere with other tasks. Likewise, CPU-intensive or network-intensive tasks scheduled to run at inopportune times might negatively affect users or the network.
To help ensure that tasks are carried out on a regular basis, but without adversely affecting users or the network, it is important for administrators to know which tasks are scheduled to run on their computers and when they are scheduled to run. Enumerating your scheduled tasks can help you minimize the impact of these activities on an individual computer and on the network as a whole.
The Win32_ScheduledJob class can be used to enumerate the following items about the scheduled tasks on a computer:
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Which task is scheduled to run. |
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When the task is scheduled to run. |
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What happened the last time the task was scheduled to run. (That is, did the task run as expected, or did it fail?) |
Scheduled task properties available through the Win32_ScheduledJob class are shown in Table 17.13.
Table 17.13 Win32_ScheduledJob Properties
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Caption |
Short description (one-line string) of the task. |
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Command |
Name of the command, batch program, or binary file (along with command-line arguments) that the schedule service will use to invoke the job. Example: "defrag /q /f" |
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DaysOfMonth |
Days of the month when the job is scheduled to run. If a job is to run on multiple days of the month, these values can be joined in a logical OR. For example, if a job is to run on the 1st and 16th of each month, the value of the DaysOfMonth property will be 1 OR 32768.
Values include:
1 - 1st
2 - 2nd
4 - 3rd
8 - 4th
16 - 5th
32 - 6th
64 - 7th
128 - 8th
256 - 9th
512 - 10th
1024 - 11th
2048 - 12th
4096 - 13th
8192 - 14th
16384 - 15th
32768 - 16th
65536 - 17th
131072 - 18th
262144 - 19th
524288 - 20th
1048576 - 21st
2097152 - 22nd
4194304 - 23rd
8388608 - 24th
16777216 - 25th
33554432 - 26th
67108864 - 27th
134217728 - 28th
268435456 - 29th
536870912 - 30th
1073741824 - 31st |
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DaysOfWeek |
Days of the week when the job is scheduled to run. If a job is to run on multiple days of the week, these values can be joined in a logical OR. For example, if a job is to run on Mondays, Wednesdays, and Fridays, the value of the DaysOfWeek property will be 1 OR 4 OR 16.
Values include:
1 - Monday
2 - Tuesday
4 - Wednesday
8 - Thursday
16 - Friday
32 - Saturday
64 - Sunday |
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Description |
Description of the object. |
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ElapsedTime |
Length of time that the job has been executing. |
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InstallDate |
Date the job was created. |
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InteractWithDesktop |
Boolean value indicating that the specified job is interactive (meaning a user can give input to a scheduled job while it is executing). |
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JobID |
Identifier number of the scheduled task. |
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JobStatus |
Status of execution the last time this job was supposed to run. Values are:
Success
Failure |
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Notify |
User to be notified upon job completion or failure. |
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Owner |
User that submitted the job. |
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Priority |
Urgency or importance of execution of a job. |
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RunRepeatedly |
Scheduled job should run repeatedly on the days that the job is scheduled. If FALSE, the job is run once. |
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StartTime |
UTC time to run the job, in the format:
YYYYMMDDHHMMSS.MMMMMM±UUU
Where YYYYMMDD must be replaced by ********.
The replacement is necessary because the scheduling service allows jobs to be configured to run only once or to run on a day of the month or week. A job cannot be run on a specific date.
For example, ********123000.000000-420 means that the task should run at 12:30 P.M. Pacific time with daylight saving time in effect.
In the Universal Time Coordinate (UTC) format:
yyyy represents the year.
mm represents the month.
dd represents the day.
HH represents the hour (in 24-hour format).
MM represents the minutes.
SS represents the seconds.
xxxxxx represents the milliseconds.
±UUU represents the number of minutes difference between the current time zone and Greenwich mean time. |
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TimeSubmitted |
Time that the job was created. |
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UntilTime |
Time after which the job is invalid or should be stopped. |
Scripting Steps
Listing 17.29 contains a script that enumerates the scheduled tasks on a computer. To carry out this task, the script must perform the following steps:
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1. |
Create a variable to specify the computer name. |
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2. |
Use a GetObject call to connect to the WMI namespace root\cimv2 on the computer, and set the impersonation level to "impersonate." |
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3. |
Use the ExecQuery method to query the Win32_ScheduledJob class.
This query returns a collection consisting of all the scheduled tasks created for the computer. |
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4. |
For each scheduled task in the collection, echo the task properties. |
Listing 17.29 Enumerating Scheduled Tasks
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strComputer = "."
Set objWMIService = GetObject("winmgmts:" _
& "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2")
Set colScheduledJobs = objWMIService.ExecQuery _
("SELECT * FROM Win32_ScheduledJob")
For Each objJob in colScheduledJobs
Wscript.Echo "Caption: " & objJob.Caption
Wscript.Echo "Command: " & objJob.Command
Wscript.Echo "Days Of Month: " & objJob.DaysOfMonth
Wscript.Echo "Days Of Week: " & objJob.DaysOfWeek
Wscript.Echo "Description: " & objJob.Description
Wscript.Echo "Elapsed Time: " & objJob.ElapsedTime
Wscript.Echo "Install Date: " & objJob.InstallDate
Wscript.Echo "Interact with Desktop: " & objJob.InteractWithDesktop
Wscript.Echo "Job ID: " & objJob.JobID
Wscript.Echo "Job Status: " & objJob.JobStatus
Wscript.Echo "Name: " & objJob.Name
Wscript.Echo "Notify: " & objJob.Notify
Wscript.Echo "Owner: " & objJob.Owner
Wscript.Echo "Priority: " & objJob.Priority
Wscript.Echo "Run Repeatedly: " & objJob.RunRepeatedly
Wscript.Echo "Start Time: " & objJob.StartTime
Wscript.Echo "Status: " & objJob.Status
Wscript.Echo "Time Submitted: " & objJob.TimeSubmitted
Wscript.Echo "Until Time: " & objJob.UntilTime
Next
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