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[Solved] Read a .gz file line by line without using gzcat


 
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# 1  
Old 10-05-2010
[Solved] Read a .gz file line by line without using gzcat

Hi all
Is there a way to read and process a gzip file line by line similar to a text file without using gzcat..

while processing a text file we will usually use the logic
Code:
exec<sample.txt
while read line
do 
echo $line
done

Is there a similar way to process the gz file in the same manner line by line without using gzcat .Thanks all in advance

Last edited by vbe; 10-05-2010 at 09:40 AM.. Reason: code tags please - the howto is in the forum rules...
# 2  
Old 10-05-2010
why you don't want to use gzcat?
another option would be then gunzip->process->gzip
# 3  
Old 10-05-2010
gzcat does 2 things : gunzip on the fly, and cat of content, all that to STD OUT.
This allows you to
Code:
gzcat my_tar_archive.tgz | tar -tvf -

If you are to not use gzcat ( could be you havent got it installed...), as the previous post suggest, you are to use gunzip and uncompress, read content and create the .gz file again
# 4  
Old 10-05-2010
Since gzip, gunzip and gzcat are the same executable, so if you have one, you have all, available all over as a binary or source. Normally, you do something like this:
gunzip < file.gz | while read ln
do
. . .
done
Compatability: uncompress will not work on .gz, but gunzip, gzcat work on compress output (.Z).

Tell us more.
# 5  
Old 10-06-2010
Bug

Thanks Guys For ur Replies..
the problem i had was gzcat was not installed in my system and was not able to figure out the solution for a line by line processing . your posts solved my problem SmilieSmilie

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