[RTEMS Project] #2916: termios: Change receive callback invocation to enable select() and poll() support

[RTEMS trac]

#2916: termios: Change receive callback invocation to enable select() and poll()
support
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 Reporter:  Sebastian Huber  |      Owner:  joel.sherrill@…
     Type:  defect           |     Status:  new
 Priority:  normal           |  Milestone:  4.12
Component:  cpukit           |    Version:
 Severity:  normal           |   Keywords:
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 Call the receive callback in case a read will succeed without to block.
 This enables the use of the receive callback for a poll() and select()
 support.  Increase raw input buffer size to allow buffering of one line.

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Ticket URL: <http://devel.rtems.org/ticket/2916>
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