NonStop S-Series Planning and Configuration Guide (G06.26+)

Glossary
HP NonStop S-Series Planning and Configuration Guide—523303-017
Glossary-102
shell
Contrast with dynamic-link library (DLL). See also TNS shared run-time library (TNS
SRL) and TNS/R native shared run-time library (TNS/R native SRL).
shell. (1) In the Open System Services (OSS) environment, a program that interprets
sequences of text input as commands. A shell can operate on an input stream, or it
can interactively prompt and read commands from a terminal. (2) An envelope of code
that provides a convenient way to call a procedure in another execution environment.
See also TNS to native-mode access shell
.
shell generator. A software tool that, given a procedure interface definition coded in pTAL
for a native-mode library procedure, produces a custom shell routine to provide access
from TNS object code to that native-mode procedure. See also TNS to native-mode
access shell.
shell map. An address table created by the HP NonStop™ operating system that contains
the entry point addresses of all available TNS to native-mode access shells. See also
TNS to native-mode access shell
.
shielded twisted pair (STP). A transmission medium consisting of two twisted conductors
with a foil or braid shield. Contrast with unshielded twisted pair (UTP)
.
shutdown file. A file invoked by the local operator or by another shutdown file that contains
commands to shut down system devices, communications lines, and system and
application software. Contrast with startup file
.
SID. See system image disk (SID) or source ServerNet ID (SID).
signal. The method by which an environment notifies a process of an event. Signals are
used to notify a process when an error that is not related to input or output has
occurred. See also Open System Services (OSS) signal
and TNS/R native signal.
signal delivery. The time when Open System Services (OSS) takes the action appropriate
for a specific process and a specific signal.
signal generation. The time when an event occurs that causes a signal for a process.
signal handler. A function or procedure that is executed when a specific signal is delivered
to a specific process.
Signaling System Number 7 (SS7). The protocol used in public networks to establish
connections between switches.
signal mask. The set of signals that are currently blocked from delivery to a specific
process.
signal reference grid. A series of conductors, constructed of pure or composite metals (for
example, copper) with good surface conductivity. A superior signal reference grid is
installed on the subfloor of a computer room and connected to the raised-floor