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termios.3: Add descriptive titles to noncanonical read() cases 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2014-03-21 15:15:06 +01:00
parent a9f0126fa6
commit f8f8b9c1f6
1 changed files with 4 additions and 4 deletions
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man3/termios.3
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@ -725,7 +725,7 @@ determine the circumstances in which a
.BR read (2)
completes; there are four distinct cases:
.TP
MIN == 0; TIME == 0:
MIN == 0, TIME == 0 (polling read)
If data is available,
.BR read (2)
returns immediately, with the lesser of the number of bytes
@ -734,12 +734,12 @@ If no data is available,
.BR read (2)
returns 0.
.TP
MIN > 0; TIME == 0:
MIN > 0, TIME == 0 (blocking read)
.BR read (2)
blocks until MIN bytes are available,
and returns up to the number of bytes requested.
.TP
MIN == 0; TIME > 0:
MIN == 0, TIME > 0 (read with timeout)
TIME specifies the limit for a timer in tenths of a second.
The timer is started when
.BR read (2)
@ -754,7 +754,7 @@ If data is already available at the time of the call to
.BR read (),
the call behaves as though the data was received immediately after the call.
.TP
MIN > 0; TIME > 0:
MIN > 0, TIME > 0 (read with interbyte timeout)
TIME specifies the limit for a timer in tenths of a second.
Once an initial byte of input becomes available,
the timer is restarted after each further byte is received.