Open System Services Porting Guide (G06.29+, H06.06+, J06.03+)

noft utility A utility that reads and displays information from TNS/R native object files.
non-regular file An OSS file that is not a regular (disk) file.
noncanonical input
mode
A terminal input mode in which data is made available to a process when a timer expires or
when a certain number of characters have been entered. Noncanonical data is not grouped into
logical lines of input. This mode is sometimes called block mode or transparent mode. Contrast
with canonical input mode.
NonStop operating
system.
See HP NonStop™ operating system.
nowait I/O The ability of an application process to continue executing in parallel with read or write operations
that it initiates. Contrast with waited I/O.
Object Code
Accelerator (OCA)
A program optimization tool that processes a TNS object file and produces an accelerated file
for a TNS/E system. OCA augments a TNS object file with equivalent sequences of Intel Itanium
instructions. TNS object code that is accelerated runs faster on TNS/E systems than TNS object
code that is not accelerated. Contrast with Accelerator.
object file A file containing compiled machine instructions for one or more routines. This file can be an
executable loadfile for a program or library or a not-yet-executable linkfile for some program
module.
OCA See Object Code Accelerator (OCA).
odd-unstructured
files
Files that have no built-in record structures and permit reading and writing of both even and odd
byte counts and positioning to both even and odd byte addresses.
open file A file with a file descriptor.
open file
description
A data structure within an HP NonStop Expand network node that contains information about
the access of a process or of a group of processes to a file. An open file description records such
attributes as the file offset, file status, and file access modes. An open file description is associated
with only one open file but can be associated with one or more file descriptors.
open system A system with interfaces that conform to international computing standards and therefore appear
the same regardless of the system’s manufacturer. For example, the OSS environment on HP
NonStop systems conforms to international standards such as ISO/IEC IS 9945-1:1990 (ANSI/IEEE
Std. 1003.1-1990, also known as POSIX.1), national standards such as FIPS 151-2, and portions
of industry specifications such as the X/Open Portability Guide Version 4 (XPG4).
Open System
Services (OSS)
An open system environment available for interactive or programmatic use with the HP NonStop
operating system. Processes that run in the OSS environment use the OSS application program
interface; interactive users of the OSS environment use the OSS shell for their command interpreter.
Synonymous with Open System Services (OSS) environment. Contrast with Guardian.
Open System
Services (OSS)
environment
The HP NonStop Open System Services (OSS) application program interface (API), tools, and
utilities.
Open System
Services (OSS)
Monitor
A Guardian utility that accepts requests through an interactive interface named the Subsystem
Control Facility (SCF).
Open System
Services (OSS)
signal
A signal model defined in the POSIX.1 specification and available to OSS processes. OSS signals
can be sent between processes.
See also signal.
operator message A message, intended for an operator, that describes a significant event on an HP NonStop server.
OSS See Open System Services (OSS).
OSS environment See Open System Services (OSS) environment.
OSS module A module compiled to execute in the OSS environment.
OSS Monitor See Open System Services (OSS) Monitor.
OSS personality See Open System Services (OSS) environment.
OSS process ID
(PID)
The unique identifier that represents a process during the lifetime of the process and during the
lifetime of the process group of that process.
See also PID.
224 Glossary