Provided by: freebsd-manpages_8.2-1_all
streams -- System V STREAMS networking ABI support
To compile support for this ABI into the kernel, place the following line
in your kernel configuration file:
Alternatively, to load the ABI as a module at boot time, place the
following line in loader.conf(5):
The streams module provides limited System V Release 4 STREAMS
interprocess communication ABI (application binary interface)
compatibility for userland applications.
Internally, streams provides STREAMS handles by using socket creation
kernel routines, and adding state-tracking information to the socket to
permit manipulation by STREAMS emulation code in svr4(4). Hence, opening
a stream device produces a result similar to what would be obtained by
Applications should never use this interface directly: STREAMS emulation
is only provided as a service to support ABI requirements in the SVR4
environment which svr4(4) needs to present to client binaries.
System V Release 4 ABI support first appeared in FreeBSD 4.0. The ABI
was ported from an equivalent facility present in NetBSD 1.3 written by
This whole interface is a crude hack to produce STREAMS semantics through
emulation over sockets.
Programmers who hope to be able to use this interface to provide SVR4
STREAMS services to BSD applications will be sorely disappointed.