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 operation.

AUTHOR

       Written by Padraig Brady.

REPORTING BUGS

       Report stdbuf bugs to bug-coreutils@gnu.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 © 2013 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.

SEE ALSO

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

              info coreutils 'stdbuf invocation'

       should give you access to the complete manual.