1

I want netcat to pipe the output of a tcp/ip connection to commands that examine the output and split it into distinct files separated by the strings "msg" and "/msg" from the output, something like

nc host port | while :
do
split 'msg' '/msg' > timestamp.txt
done

but I can't get the syntax right. In an ideal world, I'd also like the whole of the output of nc appending to another file, say big_data.txt. Maybe I should use grep?

I know how to send nc output to a file and can work out how to split it, but the file will keep appending for 12 hours each day. Also, I think it's more efficient to split the data as it arrives.

1

I did it all in R.

    stream_processor <- function(host_,port)
     con2 <- socketConnection(host=host_, port=port_)
    # as non-blocking, may need to loop for input
    readLines(con2)
    while(isIncomplete(con2)) {
        Sys.sleep(1)
        z <- unlist(readLines(con2,1000))
     write(z, file=paste(make.names(date()),'.stream',sep=''))
  }
}

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.