error correction code (ECC) --
A generic term applied to coding schemes that allow for the correction of
errors in one or more bits of a word of data.
edit mode --
In forms, the ability to use editing commands to modify text and data.
See also
form.
editor --
A program you use to edit (write or change) text stored in
a file.
effective user ID --
An active process has an effective user ID
and an effective group ID
that are used to determine file access permissions.
The effective user ID and effective group ID
are equal to the process's real user ID
and real group ID
respectively, unless the process
or one of its ancestors evolved from a file that
had the set-user-ID
bit or set-group ID bit set. See
exec(2).
electronic mail --
Messages sent using the computer.
You can send messages to any other user on your system.
You can send messages to users on other
computers if your computer is part of a network.
elevator --
(programming)
The center portion of a Scrollbar widget;
that part which moves along the cable.
ELF --
(programming)
ELF is an acronym for the executable and linking format
of the object files produced by the C compilation system.
encode --
In SNMP, to serialize an
ASN.1
instance of a data type into a string of octets. See also
OctetString.
enter --
To input one or more characters from
the keyboard, followed by <Enter>.
For example, ``Enter your password'' means to type the characters
of your password and then press the <Enter> key.
enter key -- The key labeled <Return> or <Enter>. It is represented as <Enter> in this documentation. It usually indicates that you have finished typing in a text field, that you have reached the end of a line of text, or that you are accepting text entered in a dialog box.
enveloping --
In data communications, the process whereby control information is added
around data passed from higher-level protocols to lower-level protocols. This
action is compared to putting an envelope around a letter. When the letter
(data) arrives at its destination (peer protocol on a remote system), the
envelope is removed, exposing a new envelope that is passed on (to the
higher-level protocol).
environment --
1. The various settings that control the way you work on the
UNIX system. These settings are specific to the
shell
you use and can be modified from the
command line
or by modifying shell control files. For example, the
directories the shell searches to find a command you type
are set in the
variable
PATH, which is part of your environment.
2. (programming) In FMLI, variables can be added to the environment
with the
set(1fmli)
built-in utility, and removed from the environment
with the unset utility.
FMLI also defines a local environment that contains variables
known only to the FMLI application.
environment variable --
Special variables that modify your
login shell
behavior. Typical examples are PATH, which defines the
directories in which the shell searches for files or
commands, and PROMPT which determines the on-screen shell
prompt message. See also
variable.
error message --
A message informing you that the computer cannot perform the
task you requested.
The error message briefly describes the nature of the problem.
escape key --
The escape key is marked ``Esc'' on most keyboards. In
this documentation, the escape key is referred to as <Esc>.
ETSDU --
(programming)
Expedited Transport Service Data Unit.
EUC --
(programming)
Extended UNIX system code.
exclusive access --
(programming) A feature used mainly by device allocation programs
allowing a process, or multiple processes, to exclude
access to a device by other processes.
executable --
(programming)
A program that can be processed or executed by the computer without
any further translation; a file that has execute permission, such as an
a.out
file, or a
shell script.
executable file --
A file that contains a program or command. To run the
program or command, double-click on the associated icon,
drop an appropriate file on the icon, or enter the filename
at a command prompt. Some executable files are
in binary form and are not readable like regular text
files. See also
DOS executable files.
executable program --
(programming)
An executable program
is a compiled and linked program or a shell program.
The command to execute either is the name of the file containing the program.
A compiled and linked program is called an executable object file.
See also
object file
and
executable file.
executable file icon --
The icons that represent executable files.
Double-clicking on an executable file icon executes
the program or command represented by that icon.
Some programs have their own specially designed icons and
others use a generic executable file icon.
exit --
(programming)
The exit function causes a process to terminate.
exit closes any open files
and cleans up most other information and
memory used by the process.
An exit status, or return code, is an integer value
that your program returns
to the operating system to say whether it completed
successfully or not.
See also
exit(2).
expedited data --
(programming)
Data that is considered urgent.
The specific semantics of expedited data is defined by
the transport protocol that provides the transport service.
expedited transport service data --
(programming)
The amount of expedited user data
the identity of which is preserved from one end
of a transport connection to the other.
expert level --
(programming)
Second-lowest of the four lower RPC levels.
Programs written to this level can control client and server
characteristics, interface with
rpcbind(1Mtcp),
and manipulate service dispatch.
explicit focus --
The behavior of the window manager when you can make a
window active by clicking on it with mouse button 1.
See also
explicit focus.
export --
For SNMP, to register a
MIB module.
The process whereby an SMUX
peer
informs an SNMP
agent
that the peer is assuming responsibility for managing a MIB module.
expression --
(programming)
An expression is a mathematical or logical symbol or meaningful
combination of symbols.
extent --
The incremental unit of allocation used when a file
is to be extended on a VXFS filesystem.