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Full Discussion: Check if file compressed or not
Top Forums Shell Programming and Scripting Check if file compressed or not Post 302088723 by badg3r on Thursday 14th of September 2006 04:58:56 AM
Old 09-14-2006
compress ALL non compressed files in a directory
I have now finished my script that will compress all uncompressed files in a directory, thought I'd post it to help anyone else out.
Code:
#!/bin/ksh

TEST_FILE=/tmp/tester$$
FILE=/tmp/result$$



#first cd to dir 
DIR=/u02/waptv/test

#then run file command to see what files are

for f in ${DIR}/*
do
     file $f >> $TEST_FILE
     done

#Now file TEST_FILE has many things in we need to exclude , such as the compressed files and scripts

cat $TEST_FILE|grep -v compressed|grep -v .sh  > $FILE

#now we have only the non compressed files

#remove colon and whitespace and add a gzip (or compression of choice) to the beginning of the output
TMP=/tmp/temp$$
cat $FILE | awk '{print $1}' | sed -e 's/[ \t]*$//' -e 's/\://g' -e 's/^/gzip /' >$TMP
mv $TMP $FILE

#Execute output which will compress all the files
. $FILE
# for testing cat $FILE

Hope that helps someone else too.
 

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LEARN ABOUT V7

zgrep

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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