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Although you may load and configure this library manually, an utility, stdbuf(1), can be used to run a command with the appropriate environment variables.
_STDBUF_I | |
Initial buffering definition for the standard input stream | |
_STDBUF_O | |
Initial buffering definition for the standard output stream | |
_STDBUF_E | |
Initial buffering definition for the standard error stream | |
Each variable may take one of the following values:
"0" | unbuffered |
"L" | line buffered |
"B" | fully buffered with the default buffer size |
size | fully buffered with a buffer of size bytes (suffixes 'k', 'M' and 'G' are accepted) |
# vmstat 1 | LD_PRELOAD=/usr/lib/libstdbuf.so \ STDBUF_1=L awk '$2 > 1 || $3 > 1' | cat -n
See also the manpage of stdbuf(1) for a simpler way to do this.
LIBSTDBUF (3) | April 28, 2012 |
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