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 correspond-
       ing 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-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 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.



GNU coreutils 8.5                                         November 2010                                                STDBUF(1)