COMPAT_ULTRIX(8) BSD System Manager's Manual COMPAT_ULTRIX(8)
compat_ultrix -- setup procedure for ULTRIX compatibility on MIPS and VAX
NetBSD/mips and NetBSD/vax architectures can run Risc ULTRIX and VAX
ULTRIX executables, respectively. However, you have to worry about the
legal issues of ensuring that you have a right to use any ULTRIX binaries
on your machine.
Most executables will work. The exceptions include programs that use
proprietary, ULTRIX-specific features (LAT, CI support, DECnet support)
and various system calls, ioctl()'s, or ULTRIX kernel semantics that are
difficult to emulate (e.g. ULTRIX packetfilter) or buggy (e.g. ULTRIX
All ULTRIX executables are static, so no shared libraries are required
for ULTRIX compatibility. However, ULTRIX is based on a 4.3BSD alpha
release. ULTRIX commands and libraries are often much older than their
NetBSD or even SunOS 4.x equivalents, and may require incompatible con-
SYSTEM CONFIGURATION FILES
Set up resolv.conf and svc.conf as below:
# mkdir -p /emul/ultrix/etc
# cd /emul/ultrix/etc
# egrep 'domain|nameserver' /etc/resolv.conf > ./resolv.conf
# cp -p /usr/share/examples/emul/ultrix/etc/* ./
The ULTRIX resolver library only understands domain and nameserver lines
in resolv.conf(5). You should create a copy of /etc/resolv.conf contain-
ing only those commands and put it in /emul/ultrix/etc/resolv.conf. Note
that the domain search order used by ULTRIX executables may not be the
same as native binaries; there is no good way around this.
ULTRIX uses /etc/svc.conf to select an ordered search of NIS, Hesiod, or
local flat-file mappings. You should create an /emul/ultrix/etc/svc.conf
specifying either local files or bind (DNS) lookups for all ULTRIX name
RISC ULTRIX NIS (YP) is known to not work. The ULTRIX NIS libraries have
a consistent endian-ness bug. ULTRIX NIS client will not inter-operate
with the NetBSD ypbind(8) process. The only workaround is to use
/etc/svc.conf to disable NIS (YP).
The ndbm hashed-password file used by ULTRIX are incompatible with the db
hashed-password file used by NetBSD. There is no good solution for this.
NIS would be a good one, if ULTRIX NIS worked.
The API used by Xservers to talk to the kernel is currently compatible
with ULTRIX 4.1. An implementation of the ULTRIX 4.2 Xws interface (used
by X11R6) is in progress.
A complete list of things which fail to work in ULTRIX compatibility mode
should be added here.
BSD January 16, 1999 BSD