NonStop System Glossary

real group ID
An attribute of an Open System Services (OSS) process. When an OSS process is created, the
real group ID identifies the group of the user or parent process that created the process. The real
group ID can be changed after process creation.
real user ID
An attribute of an Open System Services (OSS) process. When an OSS process is created, the
real user ID identifies the user or parent process that created the process. The real user ID can be
changed after process creation.
$RECEIVE
The name of a file through which a process receives and optionally replies to messages from other
processes.
reconfiguration
The act of changing the hardware or software configuration of a running system. Examples include
installing a new software release version update (RVU), adding hardware peripherals, and
restructuring a database. Reconfiguring a system might or might not require a planned outage.
reduced instruction-set computing (RISC)
A processor architecture based on a relatively small and simple instruction set, a large number of
general-purpose registers, and an optimized instruction pipeline that supports high-performance
instruction execution. Contrast with complex instruction-set computing (CISC) and Explicitly Parallel
Instruction Computing (EPIC).
reentrant
A function, program, or routine that can be invoked by multiple threads concurrently. This type of
function, also known as thread safe, must provide internal synchronization to ensure that any
shared or global data is properly protected.
reexported library
A library whose symbols are made available by another dynamic-link library (DLL) to any localized
client of that DLL. Reexport is an attribute of the DLL’s libList entry for that library. This attribute is
specified by the DLL’s programmer and recorded by the linker as a DLL is built. It affects only
localized clients of the DLL. This feature allows a symbol to be moved from one DLL to another
without relinking clients of the original DLL.
Reexporting is transitive; that is, if A reexports B and B reexports C, then A reexports C. Reexported
libraries can reexport other libraries to form a succession of reexported libraries of arbitrary length.
reference page
In Open System Services (OSS) and Distributed Computing Environment (DCE), the online or
hard-copy version of a file that provides reference information for a software facility. Some UNIX
product externals and end-user publications use the term man page instead, referring either to the
online delivery mechanism used to display the file (usually the shell man command) or to the nature
of the file as part of a publication.
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