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RedHat 9 (Linux i386) - man page for flush (redhat section n)

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


       flush - Flush buffered output for a channel

       flush channelId

       Flushes	any  output  that  has	been buffered for channelId.  ChannelId must be a channel
       identifier such as returned by a previous open or socket command, and it  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.

       file(n), open(n), socket(n)

       blocking, buffer, channel, flush, nonblocking, output

Tcl					       7.5					 flush(n)
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