stdbuf - phpMan

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23.5 `stdbuf': Run a command with modified I/O stream buffering

`stdbuf' allows one to modify the buffering operations of the three
standard I/O streams associated with a program.  Synopsis:

     stdbuf OPTION... COMMAND

   Any additional ARGs are passed as additional arguments to the

   The program accepts the following options.  Also see *note Common

`-i MODE'
     Adjust the standard input stream buffering.

`-o MODE'
     Adjust the standard output stream buffering.

`-e MODE'
     Adjust the standard error stream buffering.

   The MODE can be specified as follows:

     Set the stream to line buffered mode.  In this mode data is
     coalesced until a newline is output or input is read from any
     stream attached to a terminal device.  This option is invalid with
     standard input.

     Disable buffering of the selected stream.  In this mode data is
     output immediately and only the amount of data requested is read
     from input.

     Specify the size of the buffer to use in fully buffered mode.
     SIZE may be, or may be an integer optionally followed by, one of
     the following multiplicative suffixes:
          `KB' =>           1000 (KiloBytes)
          `K'  =>           1024 (KibiBytes)
          `MB' =>      1000*1000 (MegaBytes)
          `M'  =>      1024*1024 (MebiBytes)
          `GB' => 1000*1000*1000 (GigaBytes)
          `G'  => 1024*1024*1024 (GibiBytes)
     and so on for `T', `P', `E', `Z', and `Y'.

   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.

   Exit status:

     125 if `stdbuf' itself fails
     126 if COMMAND is found but cannot be invoked
     127 if COMMAND cannot be found
     the exit status of COMMAND otherwise

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