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Old 06-04-2004, 12:52 PM   #1
reitzell
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Registered: May 2004
Posts: 17

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xargs question


I'm doing something wrong with xargs. I had a bunch of rar files in a dir. and I can type unrar x file.rar and rebuild the archive. So, I thought I could ls *.rar|xargs unrar x and this would do the same thing but for all of the *.rar files I have but it doesn't work. Do you know what I'm doing wrong here?

Thanks,
Rob
 
Old 06-04-2004, 01:29 PM   #2
Demonbane
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Registered: Aug 2003
Location: Sydney, Australia
Distribution: Gentoo
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yea, the problem is that rar/unrar doesn't take multiple input files as its arguments, so basically
Code:
ls *.rar|xargs unrar x
is equivalent to
Code:
unrar x *.rar
which won't work.
You can setup a simple loop to do it one by one, eg:
Code:
for foo in *.rar; do unrar x $foo; done

Last edited by Demonbane; 06-04-2004 at 01:39 PM.
 
Old 06-04-2004, 01:29 PM   #3
micxz
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Registered: Oct 2002
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How about:

find . -name *.rar -print0 | xargs -0 unrar
 
Old 06-04-2004, 03:50 PM   #4
reitzell
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Registered: May 2004
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Thanks! Demonbane and micxz. This place rules!

(the "find ..." one doesn't work) but the for foo one does.
 
Old 07-04-2004, 03:36 AM   #5
45t3r15k
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Registered: Jul 2004
Location: Illinois
Distribution: Debian
Posts: 5

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Xargs rocks

try this
ls *.rar | xargs -i unrar x {}
Haven't tried it with the unrar command but I use this
ls *.wav | xargs -i lame {} {}.mp3
to encode a directory full of freshly ripped tracks to mp3 format
 
  


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