stdbuf
Run COMMAND, with modified buffering operations for its standard streams.
Synopsis
stdbuf
OPTION... COMMAND
add an example, a script, a trick and tips
examples
source
exec stdbuf -i0 -o0 -e0
"$@"
source
echo running genTrainMetrics
stdbuf -o0 python genTrainMetrics.py
echo
echo running genTestMetrics
stdbuf -o0 python genTestMetrics.py
echo running ordering
stdbuf -o0 python ordering.py
echo
echo running driver
stdbuf -o0 python driver.py
echo
# echo running submission
tail -f access.log | stdbuf -oL cut -d ' ' -f1 | uniq
This will immedidately display unique entries from access.log
source
stdbuf -o0 ./at_computer.py | tee --append tmp.txt
source
echo running genTrainMetrics
stdbuf -o0 python genTrainMetrics.py
echo
echo running genTestMetrics
echo running genTestMetrics
stdbuf -o0 python genTestMetrics.py
echo
echo running ordering
stdbuf -o0 python ordering.py
echo
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.
copyright
Copyright © 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 redistribute
it. There is NO WARRANTY, to the extent permitted by law.
reporting bugs
Report stdbuf bugs to bug-coreutils[:at:]gnu[:dot:]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/>
bugs
On GLIBC
platforms, specifying a buffer size, i.e. using fully
buffered mode will result in undefined operation.
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.
author
Written by
Padraig Brady.