in my system
Linux ubuntu 3.8.0-29-generic #42~precise1-Ubuntu
man page for putmsg contains reference to STREAMS man page. Stevens refers the same entity as STREAMIO (p. 858), and this is what I've found online:
http://manpages.ubuntu.com/manpages/gutsy/man7/stropts.h.7posix.html#contenttoc0
However, I can't find neither the local man page, nor how to add it locally. Please, advise.
"So from a technical point of view streams is dead" -- Alan Cox in https://lkml.org/lkml/1998/6/28/138 and yes that 1998 in the URL is the year, so it's at least 15 years past dead now.
STREAMS is not implemented in GNU/Linux. You can get a set of man pages that describe the interface as specified by POSIX by installing the manpages-posix and manpages-posix-dev packages, but you're wasting your time reading about STREAMS if your interest is anything but historical.
Of the two add-on implementations of STREAMS for Linux mentioned in the wikipedia article, one is a dead link and the other one goes to a site (openss7.org) which is focused entirely on telephone switching, and hasn't been updated since 2008.