[TriLUG] How to debug piping issues

[Chris Baldwin via TriLUG]

Silly question - what does xdotool expect?

Is it this xdotool: 
http://manpages.ubuntu.com/manpages/lucid/man1/xdotool.1.html ?

Have you tried xargs, i.e. "zbarcam --raw | xargs xdotool type --file -" ?

-Chris

On 3/28/16 8:35 PM, Reid Thompson via TriLUG wrote:
> Just wondering, did you try that command without the --file? My man page
> example for stdin doesn't have it.
>
> On Sun, Mar 27, 2016, 23:24 Brian via TriLUG <trilug at trilug.org> wrote:
>
>> On 03/27/2016 12:13 AM, Steven Tardy wrote:
>>>> On Mar 26, 2016, at 11:33 PM, Brian via TriLUG <trilug at trilug.org>
>> wrote:
>>>> $ zbarcam --raw | xdotool type --file -
>>> Typical buffering, probably have to send 4kB before the second program
>> sees anything. Google suggests "unbuffer" may prevent the pipe from
>> buffering.
>> $ unbuffer zbarcam --raw | xdotool type --file -
>>
>> No difference :-(
>>
>> Plus it seems as though if 4k buffering were the issue, my perl script
>> (run this way: zbarcam --raw | barwedge.pl ) would have the same
>> problem, and it doesn't.
>>
>> Maybe there's something about how xdotool type --file - expects the
>> stdin file handle to behave (perhaps it doesn't type anything until it
>> sees an EOF or something).
>>
>> Anyway, thanks!
>> -B
>>
>>
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