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Top Forums Shell Programming and Scripting unzip particular gzip files among the normal data files Post 302148182 by porter on Friday 30th of November 2007 05:45:51 AM
Old 11-30-2007
Quote:
Originally Posted by thepurple
So, litterally just to see the files it is not possible which one is data and which one is Gzip.
I suggest you review that strategy.

Quote:
Originally Posted by thepurple
Please provide me the coding lines how to define "file" in script....
something like

Code:
file $somefile | grep "gzip compressed data"
if test "$?" = "0"
then
    echo $somefile is gzipped
fi

 

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ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME
zgrep - search possibly compressed files for a regular expression SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename... DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code: (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep. If the GREP environment variable is set, zgrep uses it as the grep program to be invoked. EXIT CODE
2 - An option that is not supported was specified. AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1) ZGREP(1)
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