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STDBUF(1)                        User Commands                       STDBUF(1)



NAME
       stdbuf - Run COMMAND, with modified buffering operations for its standard streams.

SYNOPSIS
       stdbuf OPTION... COMMAND

DESCRIPTION
       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 e.g.) then that will override
       corresponding settings changed by 'stdbuf'.  Also some filters (like 'dd' and 'cat' etc.) don't use streams for
       I/O, and are thus unaffected by 'stdbuf' settings.

EXAMPLES
       tail -f access.log | stdbuf -oL cut -d ' ' -f1 | uniq
       This will immedidately display unique entries from access.log

BUGS
       On  GLIBC  platforms,  specifying a buffer size, i.e. using fully buffered mode will result in undefined opera-
       tion.

AUTHOR
       Written by Padraig Brady.

REPORTING BUGS
       Report stdbuf bugs to bug-coreutilsATgnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>;
       General help using GNU software: <http://www.gnu.org/gethelp/>;
       Report stdbuf translation bugs to <http://translationproject.org/team/>;

COPYRIGHT
       Copyright  (C)  2010  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 permit-
       ted by law.

SEE ALSO
       The full documentation for stdbuf is maintained as a Texinfo manual.  If the info and stdbuf programs are prop-
       erly installed at your site, the command

              info coreutils 'stdbuf invocation'

       should give you access to the complete manual.



GNU coreutils 8.4                 March 2017                         STDBUF(1)