Re: File Source - File Sink data transfer

[Steven Barbo]

not sure what the picture is saying...

opening /dev/urandom should give you data.

from a terminal, what happens if you issue:

sh-4.4$ ls -l /dev/urandom
crw-rw-rw- 1 root root 1, 9 Jul 30  2021 /dev/urandom

getting 1024 bytes from it:

sh-4.4$ dd if=/dev/urandom of=fred bs=1 count=1024
1024+0 records in
1024+0 records out
1024 bytes (1.0 kB, 1.0 KiB) copied, 0.00284394 s, 360 kB/s

should result in something such like:
sh-4.4$ ls -l fred
-rw-r--r-- 1 barbo barbo 1024 May 16 14:22 fred

On Mon, May 16, 2022 at 2:24 PM user 1 <gnuradio@onditech.com> wrote:

Hi Steven,

Thank you for your suggestion, but /dev/urandom  is an empty file ????
   See Screenshot_3


jeff

------------------



Le 16/05/2022 à 16:41, Steven Barbo a écrit :
> Howdy Jeff.
> What happens if you use /dev/urandom as file source?
>
> On Mon, May 16, 2022 at 9:09 AM user 1 <gnuradio@onditech.com
> <mailto:gnuradio@onditech.com>> wrote:
>
>     Hello Cinaed,
>
>     Unfortunately scheme doesn't work, even with a bin file.
>
>
>
>     jeff
>
>
>     ------------------------------
>
>     Le 16/05/2022 à 12:06, Cinaed Simson a écrit :
>      > Hi Jeff - the error indicates the file source has the wrong data
>     type,
>      > i.e. it may not be binary data.
>      >
>      > If the input file contains hex numbers, then you need to convert
>     each
>      > hex number to a binary number and concatenate them.
>      >
>      > -- CInaed
>      >
>      >
>      > For instance, 40 hex is equivalent to 01000000 binary.
>      >
>      > For instance,
>      >
>      > On 5/16/22 00:46, user 1 wrote:
>      >> Hi,
>      >>
>      >> Somebody could tell me why this simple scheme doesn't work (see the
>      >> screenshots)?
>      >>
>      >>       File Source   --->   Throttle    --->   File Sink
>      >>
>      >>
>      >> I work under Ubuntu 20.04.4  LTS and GnuRadio 3.9.6
>      >>
>      >>
>      >> This scheme worked fine in the past with previous releases of
>     GnuRadio.
>      >>
>      >>
>      >> Thank you for your help.
>      >>
>      >>
>      >>
>      >> Jeff
>      >
>
>
>
> --
> If something is requisite, how can it possibly be, prerequisite?
>
> vanitas vanitatum omnia vanitas
> later, steve
> http://umn.edu/~barbo <http://umn.edu/~barbo>

--

If something is requisite, how can it possibly be, prerequisite? 

vanitas vanitatum omnia vanitas
later, steve
http://umn.edu/~barbo