ultrix 4.1 rexec(3) bug?

[Peter Mutsaers]

On ultrix 4.1 (dec 5100) when I use rexec(3) in a program, I get some
strange unresolved references which do not apprear in any library:
macbuf, proxy and a few others.
By looking into libc.a I saw that the rexec code uses a function named 
ruserpass, and in this function the references are made but unresolved.

Does anyone know if this is a bug, or if I have forgotten something?
Please email replys as I do not always read this group. Thanks in
advance,
--
Peter Mutsaers                          email:    muts at fysap.fys.ruu.nl     
Rijksuniversiteit Utrecht                         muts at fys.ruu.nl
Princetonplein 5                          tel:    (+31)-(0)30-533880
3584 CG Utrecht, Netherlands