stdbuf
(1)
Name
stdbuf - Run COMMAND, with modified buffering operations for
its standard streams.
Synopsis
stdbuf OPTION... COMMAND
Description
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 corre-
sponding 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 corre-
sponding 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
This will immedidately display unique entries from
access.log
GNU coreutils 8.16 Last change: June 2014 1
User Commands STDBUF(1)
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/core-
utils/>
General help using GNU software: <http://www.gnu.org/geth-
elp/>
Report stdbuf translation bugs to <http://translationpro-
ject.org/team/>
COPYRIGHT
Copyright (C) 2012 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 redis-
tribute it. There is NO WARRANTY, to the extent permitted
by law.
ATTRIBUTES
See attributes(5) for descriptions of the following
attributes:
+---------------+--------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+--------------------+
|Availability | file/gnu-coreutils |
+---------------+--------------------+
|Stability | Uncommitted |
+---------------+--------------------+
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.
NOTES
This software was built from source available at
https://java.net/projects/solaris-userland. The original
community source was downloaded from
http://ftp.gnu.org/gnu/coreutils/coreutils-8.16.tar.xz
GNU coreutils 8.16 Last change: June 2014 2
User Commands STDBUF(1)
Further information about this software can be found on the
open source community website at http://www.gnu.org/soft-
ware/coreutils/.
GNU coreutils 8.16 Last change: June 2014 3