AT&T UNIX™PC Unix System V Users Manual - tenox

KSH ( 1 ) KSH(l)
Command Re-entry.
The text of the last lllSTSIZE (default 128) commands entered
from a terminal device is saved in a history file. The file
$HOME/ .history is used if the HISTFILE variable is not set
or is not writable. A shell can access the commands of all interactive
shells which use the same named lllSTFILE. The special
command fc is used to list or edit a portion of this file. The portion
of the file to be edited or listed can be selected by number or
by giving the first character or characters of the command. A single
command or range of commands can be specified. If you do
not specify an editor program as an argument to fc then the value
of the parameter FCEDIT is used. If FCEDIT is not defined
then /binfed is used. The edited command(s) are printed and reexecuted
upon leaving the editor. The editor name - is used to
skip the editing phase and to re-execute the command. In this
case a substitution parameter of the form old=new can be used
to modify the command before execution. For example, if r is
aliased to 'fc -e -' then typing 'r bad=good c' will re-execute
the most recent command which starts with the letter c, replacing
the string bad with the string good.
In-line Editing Options.
Normally, each command line entered from a terminal device is
simply typed followed by a new-line ('RETURN' or 'LINE
FEED'). If any of the options emacs, gmacs, or vi is active, the
user can edit the command line. To be in any one of these edit
modes set the corresponding option. An editing option is
automatically selected each time the VISUAL or EDITOR variable
is assigned a value ending in one of these option names.
The editing features require that the user's terminal accept
'RETURN' as carriage return without line feed and that a space
(' ') must overwrite the current character on the screen. ADM terminal
users should set the "space-advance" switch to 'space'.
Hewlett-Packard series 2621 terminal users should set the straps
to 'bcGHxZ etX'.
The editing modes implement a concept where the user is looking
through a window at the current line. The window width is the
value of COLUMNS if it is defined, otherwise 80. If the line is
longer than the window width minus two, a mark is displayed at
the end of the window to notify the user. As the cursor moves
and reaches the window boundaries the window will be centered
about the cursor. The mark is a > (