"flush stdout, write your message to stderr, then flush stderr." Standard Error is unbuffered: http://www.opengroup.org/onlinepubs/009695399/functions/stdin.ht

"flush stdout, write your message to stderr, then flush stderr." Standard Error is unbuffered: http://www.opengroup.org/onlinepubs/009695399/functions/stdin.html http://www.opengroup.org/onlinepubs/009695399/functions/stdi... "When opened, the standard error stream is not fully buffered; the standard input and standard output streams are fully buffered if and only if the stream can be determined not to refer to an interactive device."