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flush(n)                                    Tcl Built-In Commands                                   flush(n)



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NAME
       flush - Flush buffered output for a channel

SYNOPSIS
       flush channelId
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DESCRIPTION
       Flushes any output that has been buffered for channelId.

       ChannelId  must  be  an  identifier  for  an  open  channel such as a Tcl standard channel (stdout or
       stderr), the return value from an invocation of open or socket, or the result of a  channel  creation
       command provided by a Tcl extension.  The channel must have been opened for writing.

       If the channel is in blocking mode the command does not return until all the buffered output has been
       flushed to the channel. If the channel is in nonblocking mode, the  command  may  return  before  all
       buffered  output  has  been  flushed;  the remainder will be flushed in the background as fast as the
       underlying file or device is able to absorb it.

EXAMPLE
       Prompt for the user to type some information in on the console:
              puts -nonewline "Please type your name: "
              flush stdout
              gets stdin name
              puts "Hello there, $name!"


SEE ALSO
       file(n), open(n), socket(n), Tcl_StandardChannels(3)


KEYWORDS
       blocking, buffer, channel, flush, nonblocking, output



Tcl                                                  7.5                                            flush(n)