stdbuf(1) - phpMan

STDBUF(1)                                 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.  Binary prefixes can be used,
       too: KiB=K, MiB=M, and so on.  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 immediately 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: <https://www.gnu.org/software/coreutils/>
       Report any translation bugs to <https://translationproject.org/team/>

COPYRIGHT
       Copyright (C) 2020 Free Software Foundation, Inc.  License GPLv3+: GNU GPL  version  3  or
       later <https://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.

SEE ALSO
       Full documentation <https://www.gnu.org/software/coreutils/stdbuf>
       or available locally via: info '(coreutils) stdbuf invocation'

GNU coreutils 8.32                        February 2024                                 STDBUF(1)

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