Count number of compressed files in a tar.gz archive


 
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# 1  
Question Count number of compressed files in a tar.gz archive

Hi Folks,
I have a tar.gz compressed file with me, and I want to know the number of files in the archive without uncompressing it.
Please let me know how I can achieve it.

Regards
RK Veluvali
# 2  
use tar -vft tarfile to see the content and size of the file
# 3  
Quote:
Originally Posted by vrk1219
Hi Folks,
I have a tar.gz compressed file with me, and I want to know the number of files in the archive without uncompressing it.
Please let me know how I can achieve it.
Without decompressing it, you can't. The compressed data is meaningless to tar. You'll have to pipe it through gunzip before doing a 'tar -tf -'.
# 4  
Nobody's mentioned the O/S or how the data was compressed.
A general answer is a combination of the above posts. You have to decompress but it can be to a pipeline through "zcat".
The switches to the "tar" are:
t = list files rather than extract them
f = filename of archive (in this case "-" which means read from pipeline).


Code:
zcat tarfile.gz | tar -tf - | wc -l

# 5  
Quote:
Originally Posted by methyl
Nobody's mentioned the O/S or how the data was compressed.
The OS probably isn't important in this case since nonportable flags like -z haven't been suggested. And given the gz, it's safe to assume the compressor was gzip.
# 6  
Many unixes won't accept "-" in a parameter to "tar".
Never assume anything. (Tongue firmly in cheek).

Last edited by methyl; 08-16-2009 at 05:11 PM.. Reason: Clarified by removing clarification
 

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