1STDBUF(1)                        User Commands                       STDBUF(1)
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NAME

6       stdbuf  - Run COMMAND, with modified buffering operations for its stan‐
7       dard streams.
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SYNOPSIS

10       stdbuf OPTION... COMMAND
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DESCRIPTION

13       Run COMMAND,  with  modified  buffering  operations  for  its  standard
14       streams.
15
16       Mandatory  arguments  to  long  options are mandatory for short options
17       too.
18
19       -i, --input=MODE
20              adjust standard input stream buffering
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22       -o, --output=MODE
23              adjust standard output stream buffering
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25       -e, --error=MODE
26              adjust standard error stream buffering
27
28       --help display this help and exit
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30       --version
31              output version information and exit
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33       If MODE is `L' the corresponding stream will be  line  buffered.   This
34       option is invalid with standard input.
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36       If MODE is `0' the corresponding stream will be unbuffered.
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38       Otherwise  MODE is a number which may be followed by one of the follow‐
39       ing: KB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G, T, P,
40       E,  Z, Y.  In this case the corresponding stream will be fully buffered
41       with the buffer size set to MODE bytes.
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43       NOTE: If COMMAND adjusts the buffering of its standard  streams  (`tee'
44       does  for  e.g.) then that will override corresponding settings changed
45       by `stdbuf'.  Also some filters (like `dd' and `cat'  etc.)  don't  use
46       streams for I/O, and are thus unaffected by `stdbuf' settings.
47

EXAMPLES

49       tail -f access.log | stdbuf -oL cut -d ' ' -f1 | uniq
50       This will immedidately display unique entries from access.log
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BUGS

53       On GLIBC platforms, specifying a buffer size, i.e. using fully buffered
54       mode will result in undefined operation.
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AUTHOR

57       Written by Padraig Brady.
58

REPORTING BUGS

60       Report stdbuf bugs to bug-coreutils@gnu.org
61       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
62       General help using GNU software: <http://www.gnu.org/gethelp/>
63       Report stdbuf translation bugs to <http://translationproject.org/team/>
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66       Copyright © 2010 Free Software Foundation, Inc.   License  GPLv3+:  GNU
67       GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
68       This  is  free  software:  you  are free to change and redistribute it.
69       There is NO WARRANTY, to the extent permitted by law.
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SEE ALSO

72       The full documentation for stdbuf is maintained as  a  Texinfo  manual.
73       If  the  info  and stdbuf programs are properly installed at your site,
74       the command
75
76              info coreutils 'stdbuf invocation'
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78       should give you access to the complete manual.
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82GNU coreutils 8.5                November 2010                       STDBUF(1)
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