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Full Discussion: Generating files of specific size
Top Forums Shell Programming and Scripting Generating files of specific size Post 302077831 by nxd25 on Monday 26th of June 2006 06:03:43 PM
Old 06-26-2006
Generating files of specific size
I've been working on getting a script to take size, dir name and file name variables from an input file and creating the same dir structure along with the file of specific size.

An example of the input file:

size/dirname/filename
Code:
2100/JAN_06/12345ABC.TCC
2354/FEB_06/24564XYZ.NOS
11240/MAR_06/1212ABAB.NCC

I am able to get results with the following code:
Code:
#!/bin/sh

set filesize=$1
set dirname=$2
set filename=$3

awk -F/ '{print $1,$2,$3}' os_listing.out | \
while read filesize dirname filename
do
        mkdir $dirname
        cd $dirname
        dd if=test/inputfile of=$filename bs=1 count=$filesize
        cd ..
done

The input file is just a file with random text that equals the size of the largest file this script will create.

What I'm trying to figure out is how to add text of a fixed character length, specifically the file name inside each file when it's created, then have the dd command create the file of specific size.

If I use any of the seek options with the dd command, it will just add onto the count size, which results in larger files.

Please let me know if additional information is needed.

Thank you in advance for any help and support.
Last edited by Yogesh Sawant; 02-26-2010 at 02:07 PM.. Reason: added code tags
 

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LEARN ABOUT CENTOS

xcursorgen

XCURSORGEN(1)						      General Commands Manual						     XCURSORGEN(1)

NAME

       xcursorgen - create an X cursor file from a collection of PNG images

SYNOPSIS

       xcursorgen [ -V ] [ --version ] [ -? ] [ --help ] [ -p dir ] [ --prefix dir ] [ config-file [ output-file ] ]

DESCRIPTION

       Xcursorgen  reads the config-file to find the list of cursor images along with their hotspot and nominal size information.  Xcursorgen con-
       verts all of the images to Xcursor format and writes them to the output-file.

       Each line in the config file is of the form:
       <size> <xhot> <yhot> <filename> <ms-delay>

       Multiple images with the same <size> are used to create animated cursors, the <ms-delay> value on each line indicates how long  each  image
       should be displayed before switching to the next.  <ms-delay> can be elided for static cursors.

       If  config-file	is not specified, or is specified as "-", standard input is used for the configuration file.  If output-file is not speci-
       fied, or is specified as "-", standard output is used for the output file.

OPTIONS

       -V, --version
	       Display the version number and exit.

       -?, --help
	       Display the usage message and exit.

       -p dir, --prefix dir
	       Find cursor images in the directory specified by dir.   If not specified, the current directory is used.

SEE ALSO

       Xcursor(3)

X Version 11							 xcursorgen 1.0.5						     XCURSORGEN(1)
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