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VI(1)			  BSD General Commands Manual			 VI(1)

NAME
     vi, view — screen oriented (visual) display editor based on ex

SYNOPSIS
     vi [-R] [-l] [-r] [-t tag] [-w n] [+command] name ...

DESCRIPTION
     Vi (visual) is a display oriented text editor based on ex(1).  Ex and vi
     run the same code; it is possible to get to the command mode of ex from
     within vi and vice-versa.

     View is the same as “vi -R”, e.g. run in read-only mode.

     Available options:

     -R		Read only. Changes to the file may not be written out.

     -l		Sets options for editing LISP source (options showmatch and
		lisp).

     -r		In the event of an editor or system crash, the -r option will
		retrieve the last saved version of the specified file, or if
		no file is specified, a list of saved files is printed.

     -t tag	If tags are used (see ctags(1)) the editor is positioned at
		tag.

     -wn	The default window size is set to n.

     +command	Enter the file with command. Useful for positioning on a
		string or line number.

     The Vi Quick Reference card and the Introduction to Display Editing with
     Vi provide full details on using vi.

ENVIRONMENT
     The vi command uses the following environment variables.

     EXINIT	 User specified startup values for ex and vi.  Usually speci‐
		 fied in the file ~/.exrc

     HOME	 Default directory to search for the file ~/.exrc

     SHELL	 Shell used for escaped commands (with the ex :! command).

     TERM	 Terminal type used to lookup terminal capabilities from the
		 file /usr/share/misc/termcap.

     TERMCAP	 If set, specifies an alternate termcap file.

FILES
     /usr/libexec/ex?.?strings	 error messages
     /usr/libexec/ex?.?recover	 recover command
     /usr/libexec/ex?.?preserve	 preserve command
     /usr/share/misc/termcap	 describes capabilities of terminals
     ~/.exrc			 editor startup file
     /tmp/Exnnnnn		 editor temporary
     /tmp/Rxnnnnn		 named buffer temporary
     /var/preserve		 preservation directory

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

     Vi Quick Reference Card.

     An Introduction to Display Editing with Vi.

BUGS
     Software tabs using ^T work only immediately after the autoindent.

     Left and right shifts on intelligent terminals don't make use of insert
     and delete character operations in the terminal.

     The wrapmargin option can be fooled since it looks at output columns when
     blanks are typed.	If a long word passes through the margin and onto the
     next line without a break, then the line won't be broken.

     Insert/delete within a line can be slow if tabs are present on intelli‐
     gent terminals, since the terminals need help in doing this correctly.

     Saving text on deletes in the named buffers is somewhat inefficient.

     The source command does not work when executed as :source; there is no
     way to use the :append, :change, and :insert commands, since it is not
     possible to give more than one line of input to a : escape.  To use these
     on a :global you must Q to ex command mode, execute them, and then reen‐
     ter the screen editor with vi or open.

HISTORY
     The vi command appeared in 3.0BSD.

3rd Berkeley Distribution      December 30, 1993     3rd Berkeley Distribution
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