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STDBUF


Section: User Commands (1)
Updated: March 2014
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NAME

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

SYNOPSIS

stdbuf

OPTIONCOMMAND
 

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 [email protected]

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 © 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.



 

Index



NAME

SYNOPSIS

DESCRIPTION

EXAMPLES

BUGS

AUTHOR

REPORTING BUGS

COPYRIGHT

SEE ALSO



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