Does anyone know how to redirect the output of a program, running from a bash script, to a named pipe IN NON BLOCKING MODE (having 'O_NONBLOCK' flag set)?
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You can use a small program called ftee that is available in this StackOverflow anwser: https://stackoverflow.com/a/7620387/403614
As far as I know (and as far as my research went), there are no "bash only" solutions.