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Unix in a Nutshell, 4th Edition by Arnold Robbins

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Name

fflush

Synopsis

fflush([output-expr]){E}

Flush any buffers associated with open output file or pipe output-expr.

gawk extends this function. If no output-expr is supplied, it flushes standard output. If output-expr is the null string (""), it flushes all open files and pipes.

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