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NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | BUGS | AUTHOR | REPORTING BUGS | COPYRIGHT | SEE ALSO | COLOPHON |
STDBUF(1) User Commands STDBUF(1)
stdbuf - Run COMMAND, with modified buffering operations for its
standard streams.
stdbuf OPTION... COMMAND
Run COMMAND, with modified buffering operations for its standard
streams.
Mandatory arguments to long options are mandatory for short options
too.
-i, --input=MODE
adjust standard input stream buffering
-o, --output=MODE
adjust standard output stream buffering
-e, --error=MODE
adjust standard error stream buffering
--help display this help and exit
--version
output version information and exit
If MODE is 'L' the corresponding stream will be line buffered. This
option is invalid with standard input.
If MODE is '0' the corresponding stream will be unbuffered.
Otherwise MODE is a number which may be followed by one of the
following: KB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for
G, T, P, E, Z, Y. In this case the corresponding stream will be
fully buffered with the buffer size set to MODE bytes.
NOTE: If COMMAND adjusts the buffering of its standard streams ('tee'
does for example) then that will override corresponding changes by
'stdbuf'. Also some filters (like 'dd' and 'cat' etc.) don't use
streams for I/O, and are thus unaffected by 'stdbuf' settings.
tail -f access.log | stdbuf -oL cut -d ' ' -f1 | uniq
This will immediately display unique entries from access.log
On GLIBC platforms, specifying a buffer size, i.e., using fully
buffered mode will result in undefined operation.
Written by Padraig Brady.
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report stdbuf translation bugs to
<http://translationproject.org/team/>
Copyright © 2017 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Full documentation at: <http://www.gnu.org/software/coreutils/stdbuf>
or available locally via: info '(coreutils) stdbuf invocation'
This page is part of the coreutils (basic file, shell and text
manipulation utilities) project. Information about the project can
be found at ⟨http://www.gnu.org/software/coreutils/⟩. If you have a
bug report for this manual page, see
⟨http://www.gnu.org/software/coreutils/⟩. This page was obtained from
the tarball coreutils-8.27.tar.xz fetched from
⟨http://www.gnutls.org/download.html⟩ on 2017-07-05. If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page, or
you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
GNU coreutils 8.27 March 2017 STDBUF(1)
Pages that refer to this page: setbuf(3)