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Full Discussion: SED Substitution
Top Forums Shell Programming and Scripting SED Substitution Post 302256976 by shubhranshu on Tuesday 11th of November 2008 02:41:50 AM
Old 11-11-2008
SED Substitution
Hi ,
I am stuck up in the below scenario:-
I need to read a file name (eg A.txt) name frm another file (eg B.txt) and then I need to search for a particular expression in A.txt and substitute it with another expression.
How can I use SED inside SHELL Scripting and command prompt as well to execute the above problem.

The below is the script which I was trying to execute but I am not getting the desired O/P

++++++++++++++++++++++++++++++++++++++++++++++++
#!/bin/sh
FILE="$1"
echo ############################
echo $FILE
echo ############################

exec 3<&0
exec 0<$FILE
while read line
do
echo ############################
echo $line
echo ############################

FILE1="$line"
echo ############################
echo $FILE1
echo ############################


sed 's/feature\/frame\/work/vobs\/syscomp02\/comm\/work/' $FILE1

done
exec 0<&3
+++++++++++++++++++++++++++++++++++++++++++++++++++++
Where $1 is the input file which has the name of files to be edited.

Could someone please help?

Thanks in Advance,
SD.
 

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LEARN ABOUT DEBIAN

booldnf

booldnf(1)																booldnf(1)

NAME

       booldnf - converts a boolean expression to the DNF

SYNOPSIS

       echo 'a&(!b|c&!d)' | booldnf > result.txt

DESCRIPTION

       booldnf	is  a  program that reads boolean expressions from its standard input and rewrites them in Disjunctive Normal Form on its standard
       output.	It uses the BoolStuff library.

       The Disjunctive Normal Form is an ORing of ANDed terms.	In other words, if the OR is considered an additive operation and the AND a multi-
       plicative operation, then the DNF is a sum of products.

       Each expression must be on its own text line.  Variable names must be composed only of ASCII letters and digits.

       The AND operator is &, the OR operator is |, and the NOT operator is !.	Parentheses are allowed.

       The  command  flushes  its  output  buffer  after  each result or error message, to make sure that it can be used with bidirectional pipes.
       Results and error messages always take exactly one text line.

EXAMPLES

       The command

	      echo 'a&(!b|c&!d)' | booldnf

       should display

	      a&c&!d|a&!b

LICENSE

       This program is free software; you may redistribute it under the terms of the GNU General Public License.  This program has  absolutely	no
       warranty.

AUTHOR

       See the boolstuff(3) manual page.

BUGS

       See the boolstuff(3) manual page.

								October 13th, 2008							booldnf(1)
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