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Sorry if this is a naïve question, but let’s say I have a Ruby program called processor.rb that begins with data = STDIN.read. If I invoke this program like this
cat textfile.txt | processor.rb
Does STDIN.read wait for cat to pipe the entire textfile.txt in? Or does it assign some indeterminate portion of textfile.txt to the data variable?
I’m asking this because I recently saw a strange bug in one of my programs that suggests that the latter is the case.
Probably is line buffered and reads until it encounters a newline or EOF.