SVR5 and SCO OpenServer 5
M_DATA(D7str)
M_DATA --
carry ordinary data
Description
Intended to contain ordinary data.
Messages allocated by the
allocb(D3str)
routine are type M_DATA by default.
M_DATA messages are generally sent bidirectionally
on a Stream, and their contents can be passed
between a process and the Stream head.
In the
getmsg
and
putmsg
system calls,
the contents of M_DATA message
blocks are referred to as the data part.
Messages composed of multiple message blocks
typically have M_DATA as the message type
for all message blocks following the first.
Message type
Ordinary (non-priority).
Version applicability
ddi:
1, 2, 3, 4, 5, 5mp, 6, 6mp, 7, 7mp, 7.1, 7.1mp, 8, 8mp
oddi:
1, 2, 2mp, 3, 3mp, 4, 4mp, 5, 5mp
References
streamio
19 June 2005
© 2005 The SCO Group, Inc. All rights reserved.
OpenServer 6 and UnixWare (SVR5) HDK - June 2005