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Full Discussion: Lines with strange characters and sed...
Top Forums Shell Programming and Scripting Lines with strange characters and sed... Post 302252096 by luiscarvalheiro on Tuesday 28th of October 2008 07:27:47 PM
Old 10-28-2008
Question Lines with strange characters and sed...
Dear All:

I Have a bunch of files which I'd like to process with a shell script. The problem is that the files have strange characters in their headers, like

�g�8@L-000-MSG2__-ABCD________-FIRA_____-000001___-200806181330-__
��e�
Data from BLABLABLA, Instrument: BLABLA, Date: 2008/06/18 13:30Z
Row: 1078 Col: 1130 Lat: -22.267 Lon: 22.256 *** Something here ***

For my intents, I only need the information (in this case) from line 3 onwards. Sometimes this strange header occupies 2 lines, others 3...others...I don't know.

I made a very simple test, like

FILE=`find . -type f -name "FILENAME"`

for i in $FILE
do

FNOW=`echo $i`

#Cuts two first lines of the file
sed '1,2d' $FNOW > newfile
sed '/^$/d' -i newfile

HEADER=`head -1 newfile | cut -c1-4`
if [ "$HEADER" != "Data" ]
then
sed '1d' -i newfile
sed '/^$/d' -i newfile
fi

#A simple testing
HEADER2=`head -1 newfile | cut -c1-4`
echo ${HEADER2},${HEADER} >> test.txt

done



The problem is that.....sometimes i don't get to cut all the "strange" headers to obtain "clean" files, as you can see in some lines of test.txt

Data,@H
Data,ۘ
Data,Data
Data,@H

(etc)

So:
Is there any way to fulfill my intentions with sed? Maybe some "delete all the first lines until find the expression «Data»? Honestly, i don't know what else to try.

Thank you very much in advance
 

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LEARN ABOUT DEBIAN

test::data

Data(3pm)						User Contributed Perl Documentation						 Data(3pm)

NAME

       Test::Data -- test functions for particular variable types

SYNOPSIS

       use Test::Data qw(Scalar Array Hash Function);

DESCRIPTION

       Test::Data provides utility functions to check properties and values of data and variables.

   Functions
       Plug-in modules define functions for each data type.  See the appropriate module.

   How it works
       The Test::Data module simply imports functions from Test::Data::* modules.  Each module defines a self-contained function, and puts that
       function name into @EXPORT.  Test::Data defines its own import function, but that does not matter to the plug-in modules.

       If you want to write a plug-in module, follow the example of one that already exists.   Name the module Test::Data::Foo, where you replace
       Foo with the right name.  Test::Data should automatically find it.

BUGS

       I'm not a very good Windows Perler, so some things don't work as they should on Windows. I recently got a Windows box so I can test things,
       but if you run into problems, I can use all the patches or advice you care to send.

SEE ALSO

       Test::Data::Scalar, Test::Data::Array, Test::Data::Hash, Test::Data::Function, Test::Builder

SOURCE AVAILABILITY

       This source is in Github:

	       http://github.com/briandfoy/test-data/tree/master

AUTHOR

       brian d foy, "<bdfoy@cpan.org>"

COPYRIGHT AND LICENSE

       Copyright (c) 2002-2009 brian d foy.  All rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.14.2							    2009-02-12								 Data(3pm)
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