stdbuf Man page

STDBUF(1) User Commands STDBUF(1)

NAME

stdbuf – Run COMMAND, with modified buffering operations for its stan‐
dard 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 follow‐
ing: 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 example) then that will override corresponding changes 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

GNU coreutils online help:
Report stdbuf translation bugs to

COPRYRIGHT

Copyright © 2016 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later .
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

Full documentation at:
or available locally via: info ‘(coreutils) stdbuf invocation’

GNU coreutils 8.25 February 2016 STDBUF(1)

Ils en parlent aussi

xrootconsole | Silicone’s web