1STDBUF(1)                        User Commands                       STDBUF(1)
2
3
4

NAME

6       stdbuf  - Run COMMAND, with modified buffering operations for its stan‐
7       dard streams.
8

SYNOPSIS

10       stdbuf OPTION... COMMAND
11

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
21
22       -o, --output=MODE
23              adjust standard output stream buffering
24
25       -e, --error=MODE
26              adjust standard error stream buffering
27
28       --help display this help and exit
29
30       --version
31              output version information and exit
32
33       If MODE is 'L' the corresponding stream will be  line  buffered.   This
34       option is invalid with standard input.
35
36       If MODE is '0' the corresponding stream will be unbuffered.
37
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.
42
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
48       GNU  coreutils  online  help:  <http://www.gnu.org/software/coreutils/>
49       Report stdbuf translation bugs to <http://translationproject.org/team/>
50

EXAMPLES

52       tail -f access.log | stdbuf -oL cut -d ' ' -f1 | uniq
53       This will immedidately display unique entries from access.log
54

BUGS

56       On GLIBC platforms, specifying a buffer size, i.e. using fully buffered
57       mode will result in undefined operation.
58

AUTHOR

60       Written by Padraig Brady.
61

63       Copyright  ©  2013  Free Software Foundation, Inc.  License GPLv3+: GNU
64       GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
65       This is free software: you are free  to  change  and  redistribute  it.
66       There is NO WARRANTY, to the extent permitted by law.
67

SEE ALSO

69       The  full  documentation  for stdbuf is maintained as a Texinfo manual.
70       If the info and stdbuf programs are properly installed  at  your  site,
71       the command
72
73              info coreutils 'stdbuf invocation'
74
75       should give you access to the complete manual.
76
77
78
79GNU coreutils 8.22               October 2018                        STDBUF(1)
Impressum