Redating many RAR archives to latest file inside each RAR

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DannyR49
Posts: 2
Joined: Sat Sep 22, 2007 12:51 am

Redating many RAR archives to latest file inside each RAR

Post by DannyR49 » Sat Sep 22, 2007 1:45 am

Since 1998, I've enjoyed using a batch file I created that redates many ZIP archives to the date/time stamp of the latest file from within each ZIP. Now it's RAR's chance to come to the fore!

For WinZIP command-line PkZip25.exe (15-04-98 02:50) from Pk250c32 of PKWARE Inc., there is a 'switch' (-zipdate=newest) that lets me do this nicely and reasonably elegantly.

Code snippet from my batch file:
for %%i in ("*.zip") do C:\Utils\PkZip25.exe "%%i" -silent -zipdate=newest -del nul

I simply position within the directory I wish to manipulate, then run the batch file. It's all over and done within seconds.

Pk250c32 Syntax snippet:
-zipdate - set the file modification date of the .ZIP file.

=newest - set to the date of the "newest" file within the .ZIP file.
=oldest - set to the date of the "oldest" file within the .ZIP file.
=retain - retain the original date of the .ZIP file (the date on which the .ZIP file was created).
=none - disable the .ZIP file date in the config file, and set the .ZIP date as the last modification date.
-----------------------------
=default = the current date.
default if used on command line without a sub-option = retain

Now, there's been many frustrating moments when I would have wished to do exactly the same for RAR files, rather than manually changing the current downloaded date and time backwards to the actual (latest) date/time, making it often easier to determine amongst many files which ones really are the newest.

Can someone please help me?
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jonib
Posts: 70
Joined: Thu Mar 31, 2005 3:00 am
Location: Sweden

Re: Redating many RAR archives to latest file inside each RA

Post by jonib » Sat Sep 22, 2007 6:59 pm

Hi DannyR49
DannyR49 wrote:Code snippet from my batch file:
for %%i in ("*.zip") do C:\Utils\PkZip25.exe "%%i" -silent -zipdate=newest -del nul
This seems to do what you want

Code: Select all

for %%i in ("*.rar") do C:\Utils\rar ch -tl -inul "%%i"

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-tl            Set archive time to latest file
-inul          Disable all messages
And you need this when not using other commands

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ch            Change archive parameters
Update:
But you should know that the .RAR file is modified and stuff like "authenticity verification" is removed, but your .ZIP command seems to modify the .ZIP file also.

DannyR49
Posts: 2
Joined: Sat Sep 22, 2007 12:51 am

Redating many RAR archives to latest file inside each RAR

Post by DannyR49 » Sun Sep 23, 2007 2:56 am

Thankyou so much JoniB. It works like a treat, no mods to do whatsoever.
I guess I was looking at UnRAR's switches, instead of getting out of the square and looking at RAR's switches.
Your extra switches to use in this mode worked perfectly - thanks again.

jonib
Posts: 70
Joined: Thu Mar 31, 2005 3:00 am
Location: Sweden

Post by jonib » Sun Sep 23, 2007 3:07 pm

Glad it worked.

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