That buffering is done by libc not the OS. So no buffering if you write directly to stdout's OS file descriptor. In C, you'll observe the buffered IO if you use printf(3)/fprintf(3)/fwrite(3), but not if you used write(2) directly.
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That buffering is done by libc not the OS. So no buffering if you write directly to stdout's OS file descriptor. In C, you'll observe the buffered IO if you use
printf(3)/fprintf(3)/fwrite(3), but not if you usedwrite(2)directly.