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The STREAMS interface on SCO OpenServer, SCO UnixWare 2.1.X, and UnixWare 7 are fundamentally the same, with the major differences in the stream head ioctl commands.
On all systems, STREAMS the interface is implemented through a set of system calls and ioctl commands (issued using the ioctl system call).
See the ``System call compatibility tables'' for each STREAMS-related system call for details:
The compatibility provided in UnixWare 7 for STREAMS ioctl commands is described in ``STREAMS ioctl compatibility table''.
Note that applications compiled with the SCO OpenServer Development System must define _SVID3 in the source in order to use the following ioctl commands:
I_ATMARK I_CANPUT I_CKBAND I_FLUSHBAND I_GETBAND I_GETCLTIME I_GWROPT I_LIST I_PLINK I_PUNLINK I_SETCLTIME I_SWROPT