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Full Discussion: Using Grep in a Shell Script
Top Forums Shell Programming and Scripting Using Grep in a Shell Script Post 66592 by nbvcxzdz on Wednesday 16th of March 2005 05:26:29 AM
Old 03-16-2005
Using Grep in a Shell Script

Hi everyone,

Im trying to write a Shell script that basically creates a set of files based on a file with many records. For example if a file called dummy has the following content:

a.txt
1st line of a's text file
2nd line of a's text file
3rd line of a's text file
b.txt
1st line of b's text file
2nd line of b's text file
3rd line of b's text file

After running my shell script, 2 files should be created. The first should be called a.txt and its contents should be:
1st line of a's text file
2nd line of a's text file
3rd line of a's text file

The second file created should be called b.txt and its contents should be:
1st line of b's text file
2nd line of b's text file
3rd line of b's text file

So essentialy the name of the file is followed by its content in dummy. I've attempted to write a script to do this but ive being having problems getting it to work. If someone has done this before using similar code or completely different code could you please help me out? I think i have some error in my grep line and also other minor errors. My shell script code
is as follows:

#look at one line at a time in dummy file
line_number=1
#number of lines in file, temporarliy set to 9 but should be whatever the #number of lines in the file is
LENGTH=9

while [ $line_number -le $LENGTH ]
do
$current_line=`tail +$line_number < dummy|head -n$line_number|cat`

if [ grep ".txt" $current_line ]
then
FILENAME=$current_line
else
`echo $current_line >> $FILENAME`
fi

#$line_number='exp $line_number + 1'
line_number=`expr $line_number+1`
done




thanks
nbvcxzdz
 

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CPANPLUS::Shell(3pm)					 Perl Programmers Reference Guide				      CPANPLUS::Shell(3pm)

NAME
CPANPLUS::Shell - base class for CPANPLUS shells SYNOPSIS
use CPANPLUS::Shell; # load the shell indicated by your # config -- defaults to # CPANPLUS::Shell::Default use CPANPLUS::Shell qw[Classic] # load CPANPLUS::Shell::Classic; my $ui = CPANPLUS::Shell->new(); my $name = $ui->which; # Find out what shell you loaded $ui->shell; # run the ui shell DESCRIPTION
This module is the generic loading (and base class) for all "CPANPLUS" shells. Through this module you can load any installed "CPANPLUS" shell. Just about all the functionality is provided by the shell that you have loaded, and not by this class (which merely functions as a generic loading class), so please consult the documentation of your shell of choice. BUG REPORTS
Please report bugs or other issues to <bug-cpanplus@rt.cpan.org<gt>. AUTHOR
This module by Jos Boumans <kane@cpan.org>. COPYRIGHT
The CPAN++ interface (of which this module is a part of) is copyright (c) 2001 - 2007, Jos Boumans <kane@cpan.org>. All rights reserved. This library is free software; you may redistribute and/or modify it under the same terms as Perl itself. SEE ALSO
CPANPLUS::Shell::Default, CPANPLUS::Shell::Classic, cpanp perl v5.18.2 2014-01-06 CPANPLUS::Shell(3pm)
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