_XOPEN_STREAMS

With the exception of ioctl(), functions in the _XOPEN_STREAMS option group are not implemented in Zephyr but are provided so that conformant applications can still link. Unimplemented functions in this option group will fail, setting errno to ENOSYS †.

Enable this option with CONFIG_XSI_STREAMS.

_XOPEN_STREAMS

API	Supported
fattach()	yes †
fdetach()	yes †
getmsg()	yes †
getpmsg()	yes †
ioctl()	yes
isastream()	yes †
putmsg()	yes †
putpmsg()	yes †