inotify() in SCO UNIX

Hi

I'm going to write a program in C language to watch activity on file system
in SCO UNIX openserver 5.0.6.
Apparently Linux provide an API called "inotify" , I'm wondering what's the SCO UNIX package for this ?

AFAIK, there is none. There are similar systems for *BSD and (the BSD-based) OS X, but those are all limited to a certain OS kernel or filesystem. So it would be impossible to port to a different OS.