Anyone recognize uio.h ?

[rsilverman at eagle.wesleyan.edu]

Hello,

Does anyone out there recognize the include file "uio.h" ?  I'm trying to build 
CAP (the Columbia AppleTalk Package) on Xenix 2.3.2, with the TCP/IP runtime
and dev. system -- it's asking for this file, and I don't have it and have
never heard of it.  Any pointers will be much appreciated.

Thanks,
                                                Richard Silverman

arpa:      rsilverman at eagle.wesleyan.edu        Systems Engineer
bitnet:    rsilverman at wesleyan.bitnet           AM Computer Products
AppleLink: SILVERMAN.R                          Southington, CT 06489