ied.1 (2010 09)

i
ied(1) ied(1)
\t tab \v vertical tab
\b backspace
Three- and four-character sequences must be
\nn or \nnn, giving the octal value
for the character. If charmap is less than 256 lines long, the remaining characters
are mapped to themselves.
-p prompt Many commands do not prompt when ready for input.
ied approximates a prompt-
ing mechanism for such commands. This is not always perfectly successful, but for
many commands it helps. In the worst case, the prompt is interspersed with output
in the wrong location. prompt is a string as used in the format argument to
printf() (see printf (3S)). The only %
conversions that can be included are up to
one instance of
%d which is converted to the sequential number of the command,
and any number of occurrences of %% which is treated as a literal
% character.
Prompting is suppressed when
ied is operating in transparent mode.
-r This sets "non-raw" mode. Normally
ied uses its own editing capabilities when
reading simple text. This causes
ied to use tty line discipline most of the time.
The disadvantage of the default mode is that more context switches and general
processing are required. The advantage is that
ied is more transparent. For
example, to specifically send an end-of-file in the non-raw mode requires that the
end-of-file character (usually Ctrl-D) be followed by a carriage return. Similarly the
"literal next" function (Ctrl-V) cannot escape the line-erase and line-kill functions in
non-raw mode.
-s size This option specifies the size of the history buffer. When
ied is started with an
existing history file, approximately the last size lines are available to the history
mechanism (the number is not guaranteed to be exactly size). Other lines in the file
are retained until such time as
ied is started on that history file and it exceeds
approximately 4K bytes in size, at which time ied discards older entries at the
beginning of the file until it is near 4 KB in size. Since this occurs only at startup,
history files can grow to be quite large between restarts. Larger values of size make
the process image larger.
If
-s is not specified, the value of the environment variable IEDHISTSIZE is
used. If neither is specified, a default is used.
-t Set transparent mode. This forces ied to permanently be in transparent mode (as
discussed above). It is primarily useful with -i for some classes of automated pro-
cessing. In particular, it is useful for driving a command if the command takes as
input what ied would interpret as editing characters. Thus with the appropriate
combinations of -i and -t, it is possible to drive an editor such as
vi or a screen-
smart application from a batch file.
Should something go wrong with
ied, the SIGQUIT signal, repeated 3 times, usually aborts ied
. The
exception is the case of a fully transparent application, where
ied must be killed from another window or
terminal. This is really relevant only when there is no way to direct the serviced process to terminate
itself.
The editing capabilities of
ied are essentially those found in ksh. Only those that differ from ksh are
described below. As in ksh, the style of editing is determined from the environment variable VISUAL,or
from EDITOR if VISUAL is not specified. The value examined should end in vi, emacs,or gmacs to
specify an editor type. If it does not, ied does no editing, and history is not accessible.
In
vi mode:
J Join lines. Considering the most recently edited line (which is empty immediately
after a line is sent to the application) to be the "last line" of the history, the current
line being displayed from the history is appended to the end of the last line, and the
position in the history is reset to be at the last line which is then displayed. A space
is inserted between the old and new text on the last line. The cursor is left on that
space. Because ied’s understanding of line continuation is minimal, this is useful
for editing long statements.
v Not supported.
V Not supported.
2 Hewlett-Packard Company − 2 − HP-UX 11i Version 3: September 2010