HP NonStop G-Series - Manual (Page 194)

data transparent. Describes software that examines all eight bits of every data byte, and that uses no bit in a data
byte for its own purposes. Internationalized applications must be data transparent.
dearchived Restored into a file system from a specially formatted file called an archive.
demon On a UNIX system, a process that runs continuously to provide a specific service for other
processes. A demon does not have a controlling terminal and is not explicitly invoked. On a
system, a demon runs in the Open System Services (OSS) environment and has an OSS process
ID.
See also
static server .
device. A computer peripheral or an object that appears to an application as such.
See also
terminal .
directory entry. An object that associates a filename with a file. Several directory entries can associate names
with the same file.
See also
link .
directory loop An error condition in which a directory is identified as its own parent.
directory special
file. See directory. .
directory stream. An object with an opaque data type. A process can sequentially read directory entries from a
directory stream.
directory tree A hierarchy of directories. In the Open System Services (OSS) environment, directories are
connected to each other in a branching hierarchical fashion such that there is only one path
between any two directories (provided there is no backtracking).
directory. AA type of Open System Services (OSS) special file that contains directory entries, which name
links to other files. No two directory entries in the same directory have the same name.
distributed system. A system that consists of a group of connected, cooperating computers.
domain. In the Internet, a part of the naming hierarchy. Syntactically, a domain name consists of a sequence
of names (labels) separated by periods (dots).
duplicate file
descriptor. A file descriptor that refers to the same open file description as another file descriptor.
EDIT file An unstructured file with file code 101 in the Guardian file system. An EDIT file can be processed
by either the EDIT or PS Text Edit (TEDIT) editor. An EDIT file typically contains source program
or script code, documentation, or program output. Open System Services (OSS) functions can
open an EDIT file only for reading.
effective group ID. An attribute of a process that is used to determine permissions such as the file access allowed
for the process. The effective group ID of a process is a group ID that contributes to the group
access privileges of that process. The effective group ID of a process might be used to set the
group ID of files created by that process. The effective group ID can be changed while the process
runs.
effective user ID. An attribute of a process that is used to determine such permissions as the file access allowed
for the process. The effective user ID of a process is the user ID that determines the owner access
privileges of that process. The effective user ID of a process might be used to set the user ID of
files created by that process. The effective user ID can be changed while the process runs.
empty directory. A directory that contains only an entry for itself and an entry for the directory directly above it in
the hierarchy.
empty string. A character string that contains only a null terminator. Synonymous with a null string.
environment
strings. A vector of strings of the form name = value that are accessible to a process and are inherited
by its child processes. An environment string contains information about the environment in which
the process runs.
Epoch. The period beginning January 1, 1970, at 0 hours, 0 minutes, and 0 seconds Coordinated
Universal Time (UTC).
See also
Coordinated Universal Time (UTC). .
errno An external variable that contains the most recent error condition set by a C function.
194 Glossary