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.\" Copyright (c) 1980 Regents of the University of California.

.\" All rights reserved.  The Berkeley software License Agreement

.\" specifies the terms and conditions for redistribution.

.\"

.\"	@(#)ex.1	6.4.1 (2.11BSD) 1996/10/21

.\"

.\".TH EX 1 "October 21, 1996"

.TH EX 1 "May 22, 2000"

.UC 4

.SH NAME

ex, edit \- text editor

.SH SYNOPSIS

.B ex

[

.B \-

] [

.B \-v

] [

.B \-t 

tag

] [

.B \-r

] [

\fB+\fIcommand\fR

] [

.B \-l

]

name ...

.br

.B edit

[

ex options

]

.SH DESCRIPTION

.I Ex

is the root of a family of editors:

.I edit,

.I ex

and

.I vi.

.I Ex

is a superset of

.I ed,

with the most notable extension being a display editing facility.

Display based editing is the focus of

.I vi.

.PP

If you have not used

.I ed,

or are a casual user, you will find that the editor

.I edit

is convenient for you.

It avoids some of the complexities of

.I ex

used mostly by systems programmers and persons very familiar with

.I ed.

.PP

If you have a \s-2CRT\s0 terminal, you may wish to use a display

based editor; in this case

see

.IR vi (1),

which is a command which focuses on the display editing portion of

.I ex.

.SH DOCUMENTATION

The document

.I "Edit: A tutorial"

(USD:14) provides a comprehensive introduction to

.I edit

assuming no previous knowledge of computers or the \s-2UNIX\s0 system.

.PP

The

.I "Ex Reference Manual \- Version 3.7"

(USD:16)

is a comprehensive and complete manual for the command mode features

of

.I ex,

but you cannot learn to use the editor by reading it.

For an introduction to

more advanced forms of editing using the command mode of

.I ex

see the editing documents written by Brian Kernighan for the editor

.I ed;

the material in the introductory and advanced documents works also with

.I ex.

.PP

.I "An Introduction to Display Editing with Vi"

(USD:15)

introduces the display editor

.I vi

and provides reference material on

.I vi.

In addition, the

.I "Vi Quick Reference"

card summarizes the commands

of

.I vi

in a useful, functional way, and is useful with the

.I Introduction.

.SH FILES

.DT

/usr/share/misc/exstrings		error messages

.br

/usr/libexec/exrecover		recover command

.br

/usr/sbin/expreserve		preserve command

.br

/etc/termcap			describes capabilities of terminals

.br

~/.exrc				editor startup file

.br

/tmp/Ex\fInnnnn\fR			editor temporary

.br

/tmp/Rx\fInnnnn\fR			named buffer temporary

.br

/usr/preserve			preservation directory

.SH SEE ALSO

awk(1), ed(1), grep(1), sed(1), grep(1), vi(1), termcap(5), environ(7)

.SH AUTHOR

Originally written by William Joy

.br

Mark Horton has maintained the editor since version 2.7, adding macros,

support for many unusual terminals,

and other features such as word abbreviation mode.

.br

This version was hacked by Gunnar Ritter

to support ISO-8859 characters.

.SH BUGS

The

.I undo

command causes all marks to be lost on lines changed and then restored

if the marked lines were changed.

.PP

.I Undo

never clears the buffer modified condition.

.PP

The

.I z

command prints a number of logical rather than physical lines.

More than a screen full of output may result if long lines are present.

.PP

File input/output errors don't print a name if the command line \fB`\-'\fR

option is used.

.PP

There is no easy way to do a single scan ignoring case.

.PP

The editor does not warn if text is placed in named buffers and not used

before exiting the editor.

.PP

Null characters are discarded in input files, and cannot appear in resultant

files.

.PP

In regular expressions,

only 7-bit ASCII characters can be used.