Re: writing binary data

From: Jean-Marc Monnez (monnez.jean-marc_at_AGORA.MSA.FR)
Date: 03/29/04

  • Next message: Bill Thompson: "Re: writing binary data" 
    Date:         Mon, 29 Mar 2004 11:52:43 +0200
To: aix-l@Princeton.EDU

    The escape you need in echo or print is \0 followed by the octal value
    of the byte.
    F.e. to add 80 (hex), use 200 (octal).
    echo "\0200\c" > binfile

    Your main work is octal conversion for each byte....

    Regards

    -- JMM

    -----------------------------
    Jean-Marc MONNEZ
    MSA / AGORA / ATD
    monnez.jean-marc@agora.msa.fr
    -----------------------------

    Holger.VanKoll@SWISSCOM.COM a écrit :

    > Hello Aix-lers,
    >
    > I have this string
    >
    > 80DF000038600002540807FE38A00000
    >
    > containing 16 bytes ( 80 , DF , 00, 00 and so on).
    >
    > I want to have a binary file containg those bytes.
    > So that
    > cat file|od -x
    > would give this output:
    >
    > 0000000 80DF 0000 3860 0002 5408 07FE 38A0 0000
    >
    > I could use cut to get every single byte; f.e.
    >
    > echo 80DF000038600002540807FE38A00000|cut -c1-2
    > echo 80DF000038600002540807FE38A00000|cut -c3-4
    >
    > and I also know how to convert those bytes to decimal, if necessary.
    >
    > I just see no way to write binary data.
    > If $a contains 80 (hex) or 128 (decimal), a echo $a >filename just
    > creates a textfile with 128.
    >
    > Any suggestions?
    >
    > Regards,
    >
    > Holger 

    

    

    

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