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How to modify timestamp in a dll or exe?

How can I set the timestamp for a file via the command-line to a specific date?

My specific situation is Windows 7, and I'd prefer to use Sysinternals tools suite. A generic answer would do just fine, though.

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marked as duplicate by Joseph Hansen, Randolph West, MaQleod, Ƭᴇcʜιᴇ007, Sathya Jun 4 '11 at 6:11

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
You should probably clarify your question and state that you want to choose the new timestamp. The two current answers assume you are looking for a Windows port of the Unix command touch that sets a files's timestamp to the current time. –  William Jackson Jun 3 '11 at 20:44
    
I've looked through Sysinternals, and I'm pretty sure they don't have a utility for this. You should try the programs linked to from superuser.com/questions/135901/… –  William Jackson Jun 3 '11 at 20:50
    
@William Jackson Changed, thanks for that. Also, if it truly was a port of the Unix command touch, I could specify the date. en.wikipedia.org/wiki/Touch_(Unix). Something is wrong with the auto linking though, make sure you get both parentheses. –  Joseph Hansen Jun 3 '11 at 20:50
    
I ... can't believe I never bothered to read man touch. You have taught me something new. –  William Jackson Jun 3 '11 at 20:56

5 Answers 5

Due to William Jackson's answer, I found a similar question on Stack Overflow.

The accepted answer states to use Powershell and these commands:

$(Get-Item ).creationtime=$(Get-Date "mm/dd/yyyy hh:mm am/pm")
$(Get-Item ).lastaccesstime=$(Get-Date "mm/dd/yyyy hh:mm am/pm")
$(Get-Item ).lastwritetime=$(Get-Date "mm/dd/yyyy hh:mm am/pm")
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2  
A slight variation that is recursive and a little shorter, though less readable: "gci -rec | %{ $_.lastWriteTime = ($_.lastAccessTime = ($_.creationTime = (get-date "2011-09-14T07:10:00"))) }" –  it depends Sep 14 '11 at 6:36
2  
For people that don't know much about Powershell, you have to put the filename after Get-Item. You can also omit the string after Get-Date to set the attribute to the current date/time like the default behavior of the touch command. Finally you can pass that code as an argument to the powershell command to have it just execute that from an existing batch file. Example: powershell $(Get-Item aaa.csv).lastwritetime=$(Get-Date) –  sjbotha Sep 4 '13 at 14:03

See the answers to this question:

http://stackoverflow.com/questions/51435/windows-version-of-the-unix-touch-command

Specifically, this can be done natively with:

copy /b filename.ext +,,

This will set the timestamp to the current time.

Documentation for the copy command is on TechNet.

The commas indicate the omission of the Destination parameter.

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Can you explain how that is working? What is the +,,? How do I know what date it is being set to? –  Joseph Hansen Jun 3 '11 at 20:05
    
@josmh Check the documentation link for details. The timestamp gets set to the current time when you run the command. Are you implying that you want to be able to change the timestamp to an arbritary time of your choosing? –  William Jackson Jun 3 '11 at 20:10
2  
I'm not seeing how that helps me choose a new date for the file? –  Joseph Hansen Jun 3 '11 at 20:42

Nirsoft to the rescue: try the freeware tool nircmd. It's a bunch of useful tools in one small command line program. One of the commands allows you to specify either or both of created time and modified time, like this:

nircmd.exe setfiletime "c:\temp\myfile.txt" "24-06-2003 17:57:11" "22-11-2005 10:21:56"

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up vote 4 down vote accepted

Using Cygwin, to set the timestamp of test.txt to January 31, 2000, at 00:01.00:

touch -t 200001310001.00 test.txt
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This comes back with invalid date format error. –  ziggy May 31 '13 at 19:06

Check out the following webpage: http://www.stevemiller.net/apps/

The Win32 Console Toolbox contains a utility called 'touch' that lets you modify the times on one or more files. I believe it only works with US format times, though.

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