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uint_t so_flags; /* options to set */
short so_readopt; /* read option */
ushort_t so_wroff; /* write offset */
ssize_t so_minpsz; /* minimum read packet size */
ssize_t so_maxpsz; /* maximum read packet size */
size_t so_hiwat; /* read queue high water mark */
size_t so_lowat; /* read queue low water mark */
unsigned char so_band; /* band for water marks */
ushort_t so_erropt; /* error option */
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The following are the flags that can be set in the so_flags bit mask in the stroptions structure.
Note that multiple flags can be set.
-
SO_READOPT
- Set read option.
-
SO_WROFF
- Set
write offset.
-
SO_MINPSZ
- Set minimum packet size
-
SO_MAXPSZ
- Set maximum packet size.
-
SO_HIWAT
- Set
high water mark.
-
SO_LOWAT
- Set
low water mark.
-
SO_MREADON
- Set read notification ON.
-
SO_MREADOFF
- Set read notification OFF.
-
SO_NDELON
- Old TTY semantics for NDELAY reads and writes.
-
SO_NDELOFFSTREAMS
- Semantics for NDELAY reads and writes.
-
SO_ISTTY
- The
stream is acting as a terminal.
-
SO_ISNTTY
- The stream is not acting as a terminal.
-
SO_TOSTOP
- Stop on background writes to this stream.
-
SO_TONSTOP
- Do not stop on background writes to this stream.
-
SO_BAND
- Water
marks affect band.
-
SO_ERROPT
- Set error option.
When SO_READOPT is set,
the so_readopt field of the stroptions
structure can take one of the following values. See read(2).
-
RNORM
- Read
message normal.
-
RMSGD
- Read
message discard.
-
RMSGN
- Read
message, no discard.
When SO_BAND is set, so_band determines to which band so_hiwat and so_lowat apply.
When SO_ERROPT is set, the so_erropt field of the stroptions structure
can take a value that is either none or one of:
-
RERRNORM
- Persistent read
errors; default.
-
RERRNONPERSIST
- Non-persistent read errors.
OR'ed with either none or one of:
-
WERRNORM
- Persistent
write errors; default.
-
WERRNONPERSIST
- Non-persistent write errors.
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