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Full Discussion: Using sed in ksh to find and replace string
Top Forums Shell Programming and Scripting Using sed in ksh to find and replace string Post 302656283 by pandeyra on Thursday 14th of June 2012 11:50:46 AM
Old 06-14-2012
Using sed in ksh to find and replace string
Hi All,

I have a file in which contains location of various data files. I want to change locations using sed. Find and replace strings are in a separate file. Content of this file (/tmp/tt) -
Code:
/dd/pp/test/test/1/ /pp/aa/test/dg1/
/dd/pp/test/test/2/ /pp/aa/test/dg2/
/dd/pp/test/test/3/ /pp/aa/test/dg3/

This is how I am trying to get desired result-
Code:
cat /tmp/tt | while read LINE
do
  FND=`echo $LINE | awk '{print $1}'`
  REP=`echo $LINE | awk '{print $2}'`
  sed "s=/${FND}=${REP}=" /tmp/ccf_temp.sql > /tmp/tmp.sql && mv /tmp/tmp.sql /tmp/ccf_temp.sql
done

Above is not working. However on command line if I give find and replace string directly, sed is working fine. For example below is fine
Code:
$>sed "s/dd/pp/test/test/1//pp/aa/test/dg1/=" /tmp/ccf_temp.sql > /tmp/tmp.sql


So I believe it is the variable that is cauing issue.

Can someone help please.

Thanks in advance for your time
Last edited by Franklin52; 06-15-2012 at 04:34 AM.. Reason: Please use code tags for data and code samples
 

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LEARN ABOUT DEBIAN

test::tempdir

Test::TempDir(3pm)					User Contributed Perl Documentation					Test::TempDir(3pm)

NAME

       Test::TempDir - Temporary files support for testing.

SYNOPSIS

	       use Test::TempDir;

	       my $test_tempdir = temp_root();

	       my ( $fh, $file ) = tempfile();

	       my $directory_scratch_obj = scratch();

DESCRIPTION

       Test::TempDir provides temporary directory creation with testing in mind.

       The differences between using this and using File::Temp are:

       o   If "t/tmp" is available (writable, creatable, etc) it's preferred over $ENV{TMPDIR} etc. Otherwise a temporary directory will be used.

	   This is "temp_root"

       o   Lockfiles are used on "t/tmp", to prevent race conditions when running under a parallel test harness.

       o   The "temp_root" is cleaned at the end of a test run, but not if tests failed.

       o   "temp_root" is emptied at the begining of a test run unconditionally.

       o   The default policy is not to clean the individual "tempfiles" and "tempdirs" within "temp_root", in order to aid in debugging of failed
	   tests.

EXPORTS

       temp_root
	   The root of the temporary stuff.

       tempfile
       tempdir
	   Wrappers for the File::Temp functions of the same name.

	   The default options are changed to use "temp_root" for "DIR" and disable "CLEANUP", but these are overridable.

       scrach
	   Loads Directory::Scratch and instantiates a new one, with the same default options as "tempfile" and "tempdir".

SEE ALSO

       File::Temp, Directory::Scratch, Path::Class

VERSION CONTROL

       This module is maintained using Git. You can get the latest version from <git://github.com/nothingmuch/test-tempdir.git>.

AUTHOR

       Yuval Kogman <nothingmuch@woobling.org>

COPYRIGHT

	       Copyright (c) 2008 Yuval Kogman. All rights reserved
	       This program is free software; you can redistribute
	       it and/or modify it under the same terms as Perl itself.

perl v5.10.0							    2009-08-11							Test::TempDir(3pm)
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