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(3tcl), open(3tcl), socket(3tcl), Tcl_StandardChannels(3tcl)

KEYWORDS

       blocking, buffer, channel, flush, nonblocking, output

Tcl                                                    7.5                                           flush(3tcl)