preventing FIFO from EOF
rihad
rihad at mail.ru
Fri Dec 12 05:42:21 PST 2008
Danny Braniss wrote:
>> $ mkfifo /var/tmp/foo
>> $ buffer -i /var/tmp/foo # misc/buffer
>> # in another console:
>> $ echo hi > /var/tmp/foo
>>
>> buffer prints hi and exits. I want it to keep reading and printing
>> indefinitely.
>>
>> Further experimentation revealed that I need two writers: one dummy
>> writer that just keeps /var/tmp/foo open for writing, and the other
>> doing the "real work". This way buffer wouldn't exit. But how to emulate
>> the dummy writer? It itself needs to block on something to keep
>> /var/tmp/foo open. Any clean way to do this in shell? Maybe the solution
>> is quite simple but isn't at the tip of my tongue.
>>
>> Thanks.
>
> too easy
> n csh:
> while 1
> buffer -i /var/tmp/foo
> end
> or in sh:
> while true; do
> buffer -i /var/tmp/foo
> done
>
Thanks, but I should have said that buffer must always run to never miss
any data.
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