dd garbled output

dd garbled output

[Steven Penny]

Using this file

    $ cat file.txt
    hello
    doge
    world

I can run this command

    $ grep -v doge file.txt | dd conv=notrunc of=file.txt

and get output as expected

    $ cat file.txt
    hello
    world

However with Cygwin the end result is garbled

    $ cat infile.txt
    hello
    world
    orld

What is causing this?

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Re: dd garbled output

[Thomas Wolff]

Am 11.05.2014 09:17, schrieb Steven Penny:
> Using this file
>
>      $ cat file.txt
>      hello
>      doge
>      world
>
> I can run this command
>
>      $ grep -v doge file.txt | dd conv=notrunc of=file.txt
>
> and get output as expected
>
>      $ cat file.txt
>      hello
>      world
>
> However with Cygwin the end result is garbled
No, it's not.
>      $ cat infile.txt
>      hello
>      world
>      orld
>
> What is causing this?
Obviously, you had some content in file.txt before and *as you 
requested* (conv=notrunc, read the manual) dd did not overwrite that but 
only filled in its output at the beginning of the file.


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