Need to convert Binary files to ascii Post: 56766

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Top Forums UNIX for Advanced & Expert Users Need to convert Binary files to ascii Post 56766 by jim mcnamara on Monday 11th of October 2004 11:22:37 AM

10-11-2004

Registered User

od will jump to an offset with the -j <offset> qualifier.
The -t u4 will tell od to format the output as an unsigned decimal.

You need to check your od man page because I think the -t qualifier is not always supported, and may only support 16 bit words, not 32 bit words.

Otherwise compile and try this
cc -o bfile bfile.c
bfile `head -c -n 3404 mybinaryfile`

Code:

/* bfile.c */
#include <stdio.h>
#include <string.h>
int main(int argc, char *argv[])
{
     if (*argv[1])
     {
         if(strlen(argv[1])>3403)
         {
                 char  *p=&argv[1][3401];
                 fprintf(stdout,"%d\n",*(int *)p);
         }
      }
      return 0;
}

You are limited in postion in the file to what _POSIX_ARG_MAX is defined to for your system (in limits.h) - Normally it is 4096.

Last edited by jim mcnamara; 10-11-2004 at 12:27 PM..

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LEARN ABOUT DEBIAN

binary.createblock

Binary.createBlock(3kaya)				       Kaya module reference					 Binary.createBlock(3kaya)

NAME

       Binary::createBlock - Create a new, uninitialised block for binary data.

SYNOPSIS

       Binary createBlock( Int bsize )

ARGUMENTS

       bsize The size of the block. Block sizes cannot be changed once the block is created.

DESCRIPTION

       Create  a  new,	uninitialised block for binary data. Remember to use Builtins.byteLength(3kaya) instead of Builtins.length(3kaya) if you
       want to store Strings in these, as you may have problems with multi-byte characters otherwise.

       The uninitialised contents of this block are not guaranteed to be zeroes.

AUTHORS

       Kaya standard library by Edwin Brady, Chris Morris and others (kaya@kayalang.org). For further information see http://kayalang.org/

LICENSE

       The Kaya standard library is free software; you can redistribute it and/or modify it under the terms  of  the  GNU  Lesser  General  Public
       License (version 2.1 or any later version) as published by the Free Software Foundation.

RELATED

       Binary.Binary(3kaya)

Kaya								   October 2012 					 Binary.createBlock(3kaya)