Scripts for building a prefetch

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1

Hi all,

I’ve finally started posting BigFix stuff to a github.

These bash and PowerShell scripts accept a file path (including wildcards), get the sizes and hashes for prefetch, and output the results in a visual table. I’ve found various other scripts that do this, but wanted use only native shell languages, and also format the output in a particular way.

Enjoy!

-Andrew

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3

Thanks for sharing @atlauren. Definitely useful to have OS native methods of getting this info.

Just as sharing another approach, for those using the FixletDebugger, here are 2 relevance templates I use to build a prefetch or prefetch block code with all the file details (just replace the URL and path to files with those suitable for your use case)

Q: ( "prefetch " & name of it & " sha1:" & sha1 of it & " size:" & size of it as string & " http://my.bes.sever.com:52311/Uploads" & concatenation "/" of substrings separated by "\" of (following text of first "\myfiles4bigfix" of (pathnames of it)) & " sha256:" & sha256 of it ) of files of folder "C:\TEMP\myfiles4bigfix"
A: prefetch setup.exe sha1:10e2e8457c17ba41b8a724189a0ca7ea80a1b065 size:272896 http://my.bes.sever.com:52311/Uploads/setup.exe sha256:2f48ce34d4e55e1ba000b891f2743c6be3961503ad920d6ceb665db19d24a460
A: prefetch setup.msi sha1:fbdccb5728aaaff26b350bd4e5174d0043322714 size:415232 http://my.bes.sever.com:52311/Uploads/setup.msi sha256:ad05ce0bf59324fb859aede3e9225957d0d4acaf4925ab4b68444d8afd7644a1
T: 13.579 ms
I: plural string

Q: ("add prefetch item name=" & name of it & " sha1=" & sha1 of it & " sha256=" & sha256 of it & " size=" & size of it as string & " url=http://my.bes.server.com:52311/Uploads" & concatenation "/" of substrings separated by "\" of (following text of first "\myfiles4bigfix" of (pathnames of it))) of files of folder "C:\TEMP\myfiles4bigfix"
A: add prefetch item name=setup.exe sha1=10e2e8457c17ba41b8a724189a0ca7ea80a1b065 sha256=2f48ce34d4e55e1ba000b891f2743c6be3961503ad920d6ceb665db19d24a460 size=272896 url=http://my.bes.server.com:52311/Uploads/setup.exe
A: add prefetch item name=setup.msi sha1=fbdccb5728aaaff26b350bd4e5174d0043322714 sha256=ad05ce0bf59324fb859aede3e9225957d0d4acaf4925ab4b68444d8afd7644a1 size=415232 url=http://my.bes.server.com:52311/Uploads/setup.msi
T: 7.230 ms
I: plural string
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4

Thanks @SLB, I like your approach. Someday I might integrate “current pathname location” as an option, doing similar substitutions to magically derive the URL.

My main goals were:

  • accommodate the personal proclivity that sometimes I download while in this environment, sometimes in that other one.
  • format output in a way that is easily copy/pasted into our own property-laden actionscript templates.
  • use OS-native languages

I’ve been meaning to do this for a while, but finally got around to it after facing a particularly large list of files to churn through. :smiley:

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5

2025-04-28

These scripts now include parameter-formatted output.

% get-prefetch.sh ./foo
*** foo ***
  theName = foo
  theSize = 37
  theSha  = fbe4fb65815ffd0946824660a6d32f459ccf17fe
  ** PARAMETERS **
	parameter "theFile" = "foo"
	parameter "theSha1" = "fbe4fb65815ffd0946824660a6d32f459ccf17fe"
	parameter "theSize" = "37"

PS > get-prefetch.ps1 .\foo
*** foo ***
  theName = foo
  theSize = 242
  theSha  = C837F4F3BC9E8D19C25DC2196CD10EDBC5276422
  ** PARAMETERS **
        parameter "theFile" = "foo"
        parameter "theSha1" = "C837F4F3BC9E8D19C25DC2196CD10EDBC5276422"
        parameter "theSize" = "242"

Edit: Updated for correct quotes on the PowerShell variety.

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