In general, applications developed with either the OpenServer development
system or the OpenServer version of the GNU toolchain
(gcc, g++, etc.) are supported under OKP.
The standard interprocess communication (IPC) facilities
can be used to communicate between processes running in different personalities,
so new applications can be written for UnixWare 7 and share data with legacy
applications running under OKP.
Many of the OpenServer developer tools will also work under OKP, but
OKP is not intended as a development or maintenance environment for
OpenServer applications (see
If you migrate an existing OpenServer system to OKP,
all installed applications are migrated as part of that process.
OKP also supports common OpenServer installation utilities
for installing OpenServer applications under /openserver after you
have already populated the OKP environment.
``Installing OpenServer Applications under OKP''
Identifying OpenServer binaries
The UnixWare 7 and kernels
automatically invoke special kernel processing
when executing an OpenServer application.
They recognize all COFF binaries as OpenServer applications
and detect a special mark in the header section
of an ELF binary
that identifies it as an OpenServer application; see
OKP provides access to
most OpenServer runtime utilities
that are required for application deployment.
Many of these commands have specific behaviors or flags
on which OpenServer applications rely
or are not part of the native UnixWare 7 environment.
These commands are accessed automatically
when an application is executed through the
command, which calls
to change the root directory for the command
and maps other OpenServer environment characteristics appropriately.
This enables OpenServer applications that depend on literal paths
to execute correctly under OKP
and prevents namespace conflicts with native UnixWare 7 shells and utilities.
Native support for OpenServer library functions and system calls
OKP includes specially-modified versions
of the current OpenServer libraries,
optimized to run on UnixWare 7.
Note the following exceptions
Some undocumented OpenServer flags for the
system call functions are not supported.
The SUDS system call extensions
(aio, sem, latch, timers)
are not supported.
However, most applications are coded
to call alternatives if such calls are not
available and so will run under OKP.
Some old XENIX facilities that are included in OpenServer
are not currently available to OKP applications.
Examples include mandatory file and record locking,
XENIX semaphores, and XENIX shared data.
XENIX binaries cannot be run in the current OKP implementation.
Specific OpenServer system administration
and system debugging system call support
is not provided.
Specifically, some of the functions to
are not supported,
features such as PIPE are not supported.
Application migration utilities
utilities to populate the OKP environment.
OpenServer terminal definitions
All OpenServer terminfo files
as well as
when running OKP.
OpenServer languages, locales, and message catalogs
OpenServer style internationalization and localization
are mapped to the corresponding UnixWare 7 locales
command used to execute OpenServer applications under OKP.
Ability to launch applications at init time
Scripts executed by the OpenServer /etc/rc2 script
can be executed under OKP without modification.
The OKP migration utilities
adjust OpenServer applications
to run under the native UnixWare 7 security provisions
with restrictions similar to those
that are provided by the OpenServer Trusted Computing Base (TCB).
To do this, OKP creates the /openserver/etc/default/security file
with TCBFILES=OFF set
to disable the TCB.
This prevents potential conflicts that could arise
between the OpenServer and UnixWare 7 security mechanisms.
System security for applications running under OKP
is managed through UnixWare 7 administrative tools;
Managing system security
for information about the UnixWare 7 security facilities.
Limited support is provided for the
security call in ELF binaries.
call is not supported.
SecureWare commands are not supported.
OKP includes facilities to facilitate and synchronize
OKP with the native UnixWare 7 and LKP personalities.
Some OpenServer system files such as
live in different locations and have different formats
on UnixWare 7.
The UnixWare 7
utility synchronizes files between native UnixWare 7 and OKP.
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 22 April 2004