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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 LINUX

dbs-edit-patch

DBS-EDIT-PATCH(1)                                               Debian Build System                                              DBS-EDIT-PATCH(1)

NAME

       dbs-edit-patch - Edit a DBS patch

SYNOPSIS

       dbs-edit-patch [options] patch
       dbs-edit-patch -h|--help

DESCRIPTION

       dbs-edit-patch is script to generate or modify patches for Debian source-packages in DBS format.

WARNING

       dbs  is  deprecated,  please  switch  to  the  `3.0 (quilt)' Debian source package format instead. See http://wiki.debian.org/Projects/Deb-
       Src3.0#FAQ for a short guide how to do it.

OPTIONS

       -h, --help
              Show summary of options.

       -t dir, --tmpdir=dir
              Directory for the temporary files, default is /tmp or if set $TMP.

       -s dir, --sourcedir=dir
              Top level directory of the debian-package source-tree, default is the present working directory.

       -P dir, --sourcepatchdir=dir
              Directory containing upstream patches.

       -T dir, --sourcetardir=dir
              Directory containing the upstream tarball.

       -p level, --strip=level
              Striplevel -p of patch (Option -p of diff(1)), accepted values are 0 and 1, default is 0.

ENVIRONMENT VARIABLES

       TMP    Sets the directory for the temporary files, can be overridden with -t dir.

debian/vars
       dbs-edit-patch will automatically use variables defined in the optional debian/vars file.

       When a file debian/vars.in exists and debian/vars either does not exist or is older  than  any  of  the  following  files:  debian/vars.in,
       debian/changelog, debian/rules or debian/control, then dbs-edit-patch will try updating the vars file by running the following command
           make -f debian/rules -W debian/vars.in debian/vars

EXAMPLES

       Edit the 021_debian patch of Heimdal:

           ~/heimdal-0.3d> dbs-edit-patch -t/tmp 021_debian
           Extracting source heimdal-0.3d.tar.gz ... successful.
           Applying patch 001_replay ... successful.
           etc.
           Copying heimdal-0.3d to heimdal-0.3d-old ... successful.
           Applying patch 021_debian ... successful.

       Edit  files under /tmp/021_debian/heimdal-0.3d as required, then put a short description into /tmp/021_debian/patch-description if desired,
       and finally execute /tmp/021_debian/dbs-update-patch to save the results.

       Technical  note:  dbs-edit-patch  extracts  all  patches  before  021_debian  into  /tmp/021_debian/heimdal-0.3d,  copies  the  result   to
       /tmp/021_debian/heimdal-0.3d-old,  and  applies the last patch 021_debian (if it exists). Also, it creates a shell script which will create
       the diff between the old and new directories:

           ~/heimdal-0.3d> ls -la /tmp/021_debian
           total 12
           -rwxr-xr-x    1 bam      users         112 Jan 31 13:31 dbs-update-patch*
           -rw-r--r--    1 bam      users           0 Jan 31 13:31 patch-description
           drwxr-xr-x   14 bam      users        4096 Jan 31 13:31 heimdal-0.3d/
           drwxr-xr-x   14 bam      users        4096 Jan 31 13:31 heimdal-0.3d-old/
           drwxr-xr-x    5 bam      users        4096 Jan 31 13:31 .stampdir/

           ~/heimdal-0.3d> cat /tmp/021_debian/dbs-update-patch
           #!/bin/sh -e
           cd "/tmp/021_debian"
           HOOK_DIR="/usr/src/heimdal/debian/dbs-hooks"
           test -d "$HOOK_DIR" && run-parts "$HOOK_DIR" --arg update-patch-prediff
           find -name "*.bak" -print0 | xargs -0 --no-run-if-empty rm
           find -name "*~" -print0 | xargs -0 --no-run-if-empty rm
           : > new_patch
           test ! -e patch-description || cp patch-description new_patch
           diff -ruN heimdal-0.3d-old heimdal-0.3d >> new_patch || test $? -eq 1
           mv new_patch  /usr/src/heimdal/debian/patches/021_debian
           test -d "$HOOK_DIR" && run-parts "$HOOK_DIR" --arg update-patch-postdiff

SEE ALSO

       diff(1), dbs(7), /usr/share/doc/dbs/

AUTHOR

       DBS was written by Adam Heath, modified by Ben Collins, modified and packaged for Debian by  Brian  May.  This  manpage  was  generated  by
       Andreas Metzler and modified by Robert Luberda.

Debian                                                          February 15th, 2011                                              DBS-EDIT-PATCH(1)
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