[BRLTTY] Appending NUL to cat

[james collins]

while read line
do
     echo "$line"
     echo -en "\x00"
done > /dev/cu.usbserial-FTKVMAFF
got this from an apple site. I looked at
the man page for echo and bash, I have a
hard time reading man pages, but for echo
I don't have -e, it just has -n? Is -e
part of bash? Do you think the above
would work? If I put it in a text file?


Sent from my iPhone

On Sep 28, 2009, at 1:06 PM, Dave Mielke <dave at mielke.cc> wrote:

> [quoted lines by james collins on 2009/09/28 at 12:29 -0400]
>
>> Just wondering what I am doing wrong? I want to use cat, but I want  
>> to
>> append a NUL character to what I type? I tried typing:
>> echo -e -n '\000' | cat > /dev/cu.usbserial -FTKVMAFF
>> What I was hoping would happen, is my cursor would drop down a line
>> and I would be in the cat command, I would then right some text and
>> when I hit return, a NUL character would be appended to the text I  
>> had
>> written and my synthesizer would speak the words I had written?
>
> I think you mustn't be very familiar with Unix-style operating  
> systems.
>
> When you join two commands with |, what you're doing is redirecting  
> the input
> of the second command (in your case, cat) away from your keyboard  
> and to the
> output of the first command (in your case, echo).
>
> There's no magic way to do what you're wanting to do. If you want a  
> NUL
> appended to each line you type before that line is written to your  
> synthesizer
> then you're going to have to write a simple program to do exactly  
> that. In this
> case, a fairly simple shell script should suffice.
>
> -- 
> Dave Mielke           | 2213 Fox Crescent | The Bible is the very  
> Word of God.
> Phone: 1-613-726-0014 | Ottawa, Ontario   | 2011 May 21 is the Day  
> of Judgement.
> EMail: dave at mielke.cc | Canada  K2A 1H7   | 2011 Oct 21 is the End  
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