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NetBSD 6.1.5 - man page for view (netbsd section 1)

VI(1)											    VI(1)

NAME
       ex, vi, view - text editors

SYNOPSIS
       ex [-eFGRrSsv] [-c cmd] [-t tag] [-w size] [file ...]
       vi [-eFlRrSv] [-c cmd] [-t tag] [-w size] [file ...]
       view [-eFGRrSv] [-c cmd] [-t tag] [-w size] [file ...]

LICENSE
       The  vi	program  is freely redistributable.  You are welcome to copy, modify and share it
       with others under the conditions listed in the LICENSE file.  If any company (not individ-
       ual!)  finds  vi  sufficiently  useful that you would have purchased it, or if any company
       wishes to redistribute it, contributions to the authors would be appreciated.

DESCRIPTION
       Vi is a screen oriented text editor.  Ex is a line-oriented text editor.  Ex  and  vi  are
       different interfaces to the same program, and it is possible to switch back and forth dur-
       ing an edit session.  View is the equivalent of using the -R (read-only) option of vi.

       This manual page is the one provided with the nex/nvi versions of the ex/vi text  editors.
       Nex/nvi are intended as bug-for-bug compatible replacements for the original Fourth Berke-
       ley Software Distribution (4BSD) ex and vi programs.  For the rest of  this  manual  page,
       nex/nvi	is  used only when it's necessary to distinguish it from the historic implementa-
       tions of ex/vi.

       This manual page is intended for users already familiar with ex/vi.   Anyone  else  should
       almost certainly read a good tutorial on the editor before this manual page.  If you're in
       an unfamiliar environment, and you absolutely have to get work done immediately, read  the
       section after the options description, entitled ``Fast Startup''.  It's probably enough to
       get you going.

       The following options are available:

       -c     Execute cmd immediately after starting the edit session.	Particularly  useful  for
	      initial  positioning  in	the  file, however cmd is not limited to positioning com-
	      mands.  This is the POSIX  1003.2  interface  for  the  historic	``+cmd''  syntax.
	      Nex/nvi supports both the old and new syntax.

       -e     Start editing in ex mode, as if the command name were ex.

       -F     Don't  copy the entire file when first starting to edit.	(The default is to make a
	      copy in case someone else modifies the file during your edit session.)

       -G     Start editing in gtags mode, as if the gtagsmode option was set.

       -l     Start editing with the lisp and showmatch options set.

       -R     Start editing in read-only mode, as if the command name was view, or  the  readonly
	      option was set.

       -r     Recover  the  specified  files,  or, if no files are specified, list the files that
	      could be recovered.  If no recoverable files by the specified name exist, the  file
	      is edited as if the -r option had not been specified.

       -S     Run with the secure edit option set, disallowing all access to external programs.

       -s     Enter  batch  mode; applicable only to ex edit sessions.	Batch mode is useful when
	      running ex scripts.  Prompts, informative messages and other user oriented  message
	      are  turned off, and no startup files or environmental variables are read.  This is
	      the POSIX 1003.2 interface for the historic ``-'' argument.  Nex/nvi supports  both
	      the old and new syntax.

       -t     Start editing at the specified tag.  (See ctags(1)).

       -w     Set the initial window size to the specified number of lines.

       -v     Start editing in vi mode, as if the command name was vi or view.

       Command	input  for  ex/vi is read from the standard input.  In the vi interface, it is an
       error if standard input is not a terminal.  In the ex interface, if standard input is  not
       a terminal, ex will read commands from it regardless, however, the session will be a batch
       mode session, exactly as if the -s option had been specified.

       Ex/vi exits 0 on success, and greater than 0 if an error occurs.

FAST STARTUP
       This section will tell you the minimum amount that you need to  do  simple  editing  tasks
       using  vi.   If you've never used any screen editor before, you're likely to have problems
       even with this simple introduction.  In that case you should  find  someone  that  already
       knows vi and have them walk you through this section.

       Vi  is  a screen editor.  This means that it takes up almost the entire screen, displaying
       part of the file on each screen line, except for the last line of the  screen.	The  last
       line  of the screen is used for you to give commands to vi, and for vi to give information
       to you.

       The other fact that you need to understand is that vi is a modeful editor,  i.e.  you  are
       either  entering  text or you are executing commands, and you have to be in the right mode
       to do one or the other.	You will be in command mode when you first start editing a  file.
       There  are commands that switch you into input mode.  There is only one key that takes you
       out of input mode, and that is the <escape> key.  (Key names are written  using	less-than
       and  greater-than  signs, e.g.  <escape> means the ``escape'' key, usually labeled ``esc''
       on your terminal's keyboard.)  If you're ever confused as to which mode	you're	in,  keep
       entering  the  <escape> key until vi beeps at you.  (Generally, vi will beep at you if you
       try and do something that's not allowed.  It will also display error messages.)

       To start editing a file, enter the command ``vi file_name<carriage-return>''.  The command
       you  should  enter  as  soon  as  you  start  editing is ``:set verbose showmode<carriage-
       return>''.  This will make the editor give you verbose error messages and display the cur-
       rent mode at the bottom of the screen.

       The commands to move around the file are:

       h      Move the cursor left one character.

       j      Move the cursor down one line.

       k      Move the cursor up one line.

       l      Move the cursor right one character.

       <cursor-arrows>
	      The cursor arrow keys should work, too.

       /text<carriage-return>
	      Search  for the string ``text'' in the file, and move the cursor to its first char-
	      acter.

       The commands to enter new text are:

       a      Append new text, after the cursor.

       i      Insert new text, before the cursor.

       o      Open a new line below the line the cursor is on, and start entering text.

       O      Open a new line above the line the cursor is on, and start entering text.

       <escape>
	      Once you've entered input mode using the one of the a, i,  O  or	o  commands,  use
	      <escape> to quit entering text and return to command mode.

       The commands to copy text are:

       yy     Copy the line the cursor is on.

       p      Append the copied line after the line the cursor is on.

       The commands to delete text are:

       dd     Delete the line the cursor is on.

       x      Delete the character the cursor is on.

       The commands to write the file are:

       :w<carriage-return>
	      Write  the file back to the file with the name that you originally used as an argu-
	      ment on the vi command line.

       :w file_name<carriage-return>
	      Write the file back to the file with the name ``file_name''.

       The commands to quit editing and exit the editor are:

       :q<carriage-return>
	      Quit editing and leave vi (if you've modified the file, but not saved your changes,
	      vi will refuse to quit).

       :q!<carriage-return>
	      Quit, discarding any modifications that you may have made.

       One final caution.  Unusual characters can take up more than one column on the screen, and
       long lines can take up more than a single screen line.  The above commands work on ``phys-
       ical''  characters  and	lines, i.e. they affect the entire line no matter how many screen
       lines it takes up and the entire character no matter how many screen columns it takes up.

VI COMMANDS
       The following section describes the commands available in the command mode of the vi  edi-
       tor.  In each entry below, the tag line is a usage synopsis for the command character.

       [count] <control-A>
	      Search forward count times for the current word.

       [count] <control-B>
	      Page backwards count screens.

       [count] <control-D>
	      Scroll forward count lines.

       [count] <control-E>
	      Scroll forward count lines, leaving the current line and column as is, if possible.

       [count] <control-F>
	      Page forward count screens.

       <control-G>
	      Display the file information.

       <control-H>

       [count] h
	      Move the cursor back count characters in the current line.

       [count] <control-J>

       [count] <control-N>

       [count] j
	      Move the cursor down count lines without changing the current column.

       <control-L>

       <control-R>
	      Repaint the screen.

       [count] <control-M>

       [count] +
	      Move the cursor down count lines to the first nonblank character of that line.

       [count] <control-P>

       [count] k
	      Move the cursor up count lines, without changing the current column.

       <control-T>
	      Return to the most recent tag context.

       <control-U>
	      Scroll backwards count lines.

       <control-W>
	      Switch to the next lower screen in the window, or, to the first screen if there are
	      no lower screens in the window.

       <control-Y>
	      Scroll backwards count lines, leaving the current line and column as is, if  possi-
	      ble.

       <control-Z>
	      Suspend the current editor session.

       <escape>
	      Execute ex commands or cancel partial commands.

       <control-]>
	      Push  a  tag reference onto the tag stack.  In gtagsmode, if at the first column of
	      line, locate function references otherwise function definitions.

       <control-^>
	      Switch to the most recently edited file.

       [count] <space>

       [count] l
	      Move the cursor forward count characters without changing the current line.

       [count] ! motion shell-argument(s)
	      Replace text with results from a shell command.

       [count] # #|+|-
	      Increment or decrement the cursor number.

       [count] $
	      Move the cursor to the end of a line.

       %      Move to the matching character.

       &      Repeat the previous substitution command on the current line.

       '<character>

       `<character>
	      Return to a context marked by the character <character>.

       [count] (
	      Back up count sentences.

       [count] )
	      Move forward count sentences.

       [count] ,
	      Reverse find character count times.

       [count] -
	      Move to first nonblank of the previous line, count times.

       [count] .
	      Repeat the last vi command that modified text.

       /RE<carriage-return>

       /RE/ [offset]<carriage-return>

       ?RE<carriage-return>

       ?RE? [offset]<carriage-return>

       N

       n      Search forward or backward for a regular expression.

       0      Move to the first character in the current line.

       :      Execute an ex command.

       [count] ;
	      Repeat the last character find count times.

       [count] < motion

       [count] > motion
	      Shift lines left or right.

       @ buffer
	      Execute a named buffer.

       [count] A
	      Enter input mode, appending the text after the end of the line.

       [count] B
	      Move backwards count bigwords.

       [buffer] [count] C
	      Change text from the current position to the end-of-line.

       [buffer] D
	      Delete text from the current position to the end-of-line.

       [count] E
	      Move forward count end-of-bigwords.

       [count] F <character>
	      Search count times backward through the current line for <character>.

       [count] G
	      Move to line count, or the last line of the file if count not specified.

       [count] H
	      Move to the screen line count - 1 lines below the top of the screen.

       [count] I
	      Enter input mode, inserting the text at the beginning of the line.

       [count] J
	      Join lines.

       [count] L
	      Move to the screen line count - 1 lines above the bottom of the screen.

	M     Move to the screen line in the middle of the screen.

       [count] O
	      Enter input mode, appending text in a new line above the current line.

       [buffer] P
	      Insert text from a buffer.

       Q      Exit vi (or visual) mode and switch to ex mode.

       [count] R
	      Enter input mode, replacing the characters in the current line.

       [buffer] [count] S
	      Substitute count lines.

       [count] T <character>
	      Search backwards, count times, through the current line for the character after the
	      specified <character>.

       U      Restore the current line to its state before the cursor last moved to it.

       [count] W
	      Move forward count bigwords.

       [buffer] [count] X
	      Delete count characters before the cursor.

       [buffer] [count] Y
	      Copy (or ``yank'') count lines into the specified buffer.

       ZZ     Write the file and exit vi.

       [count] [[
	      Back up count section boundaries.

       [count] ]]
	      Move forward count section boundaries.

       ^      Move to first nonblank character on the current line.

       [count] _
	      Move down count - 1 lines, to the first nonblank character.

       [count] a
	      Enter input mode, appending the text after the cursor.

       [count] b
	      Move backwards count words.

       [buffer] [count] c motion
	      Change a region of text.

       [buffer] [count] d motion
	      Delete a region of text.

       [count] e
	      Move forward count end-of-words.

       [count] f<character>
	      Search forward, count times, through the rest of the current line for <character>.

       [count] i
	      Enter input mode, inserting the text before the cursor.

       m <character>
	      Save the current context (line and column) as <character>.

       [count] o
	      Enter input mode, appending text in a new line under the current line.

       [buffer] p
	      Append text from a buffer.

       [count] r <character>
	      Replace count characters.

       [buffer] [count] s
	      Substitute  count  characters in the current line starting with the current charac-
	      ter.

       [count] t <character>
	      Search forward, count times, through the current line for the character immediately
	      before <character>.

       u      Undo the last change made to the file.

       [count] w
	      Move forward count words.

       [buffer] [count] x
	      Delete count characters.

       [buffer] [count] y motion
	      Copy (or ``yank'') a text region specified by the count and motion into a buffer.

       [count1] z [count2] -|.|+|^|<carriage-return>
	      Redraw, optionally repositioning and resizing the screen.

       [count] {
	      Move backward count paragraphs.

       [count] |
	      Move to a specific column position on the current line.

       [count] }
	      Move forward count paragraphs.

       [count] ~
	      Reverse the case of the next count character(s).

       [count] ~ motion
	      Reverse  the  case  of  the  characters in a text region specified by the count and
	      motion.

       <interrupt>
	      Interrupt the current operation.

VI TEXT INPUT COMMANDS
       The following section describes the commands available in the text input mode  of  the  vi
       editor.

       <nul>  Replay the previous input.

       <control-D>
	      Erase to the previous shiftwidth column boundary.

       ^<control-D>
	      Erase all of the autoindent characters, and reset the autoindent level.

       0<control-D>
	      Erase all of the autoindent characters.

       <control-T>
	      Insert  sufficient  <tab>  and  <space>  characters  to  move  forward  to the next
	      shiftwidth column boundary.  If expandtab is set, only insert <space> characters.

       <erase>

       <control-H>
	      Erase the last character.

       <literal next>
	      Quote the next character.

       <escape>
	      Resolve all text input into the file, and return to command mode.

       <line erase>
	      Erase the current line.

       <control-W>

       <word erase>
	      Erase the last word.  The definition of word is dependent on the altwerase and tty-
	      werase options.

       <control-X>[0-9A-Fa-f]+
	      Insert a character with the specified hexadecimal value into the text.

       <interrupt>
	      Interrupt text input mode, returning to command mode.

EX COMMANDS
       The  following  section	describes the commands available in the ex editor.  In each entry
       below, the tag line is a usage synopsis for the command.

       <end-of-file>
	      Scroll the screen.

       ! argument(s)

       [range]! argument(s)
	      Execute a shell command, or filter lines through a shell command.

       "      A comment.

       [range] nu[mber] [count] [flags]

       [range] # [count] [flags]
	      Display the selected lines, each preceded with its line number.

       @ buffer

       * buffer
	      Execute a buffer.

       [line] a[ppend][!]
	      The input text is appended after the specified line.

       [range] c[hange][!] [count]
	      The input text replaces the specified range.

       cs[cope] add | find | help | kill | reset
	      Execute a Cscope command.

       [range] d[elete] [buffer] [count] [flags]
	      Delete the lines from the file.

       di[splay] b[uffers] | c[onnections] | s[creens] | t[ags]
	      Display buffers, Cscope connections, screens or tags.

       [Ee][dit][!] [+cmd] [file]

       [Ee]x[!] [+cmd] [file]
	      Edit a different file.

       exu[sage] [command]
	      Display usage for an ex command.

       f[ile] [file]
	      Display and optionally change the file name.

       [Ff]g [name]
	      Vi mode only.  Foreground the specified screen.

       [range] g[lobal] /pattern/ [commands]

       [range] v /pattern/ [commands]
	      Apply commands to lines matching (or not matching) a pattern.

       he[lp] Display a help message.

       [line] i[nsert][!]
	      The input text is inserted before the specified line.

       [range] j[oin][!] [count] [flags]
	      Join lines of text together.

       [range] l[ist] [count] [flags]
	      Display the lines unambiguously.

       map[!] [lhs rhs]
	      Define or display maps (for vi only).

       [line] ma[rk] <character>

       [line] k <character>
	      Mark the line with the mark <character>.

       [range] m[ove] line
	      Move the specified lines after the target line.

       mk[exrc][!] file
	      Write the abbreviations, editor options and maps to the specified file.

       [Nn][ext][!] [file ...]
	      Edit the next file from the argument list.

       [line] o[pen] /pattern/ [flags]
	      Enter open mode.

       pre[serve]
	      Save the file in a form that can later be recovered using the ex -r option.

       [Pp]rev[ious][!]
	      Edit the previous file from the argument list.

       [range] p[rint] [count] [flags]
	      Display the specified lines.

       [line] pu[t] [buffer]
	      Append buffer contents to the current line.

       q[uit][!]
	      End the editing session.

       [line] r[ead][!] [file]
	      Read a file.

       rec[over] file
	      Recover file if it was previously saved.

       res[ize] [+|-]size
	      Vi mode only.  Grow or shrink the current screen.

       rew[ind][!]
	      Rewind the argument list.

       rta[g][!] tagstring
	      Edit the file referring the specified tag. (Only in gtagsmode)

       se[t] [option[=[value]] ...] [nooption ...] [option? ...] [all]
	      Display or set editor options.

       sh[ell]
	      Run a shell program.

       so[urce] file
	      Read and execute ex commands from a file.

       [range] s[ubstitute] [/pattern/replace/] [options] [count] [flags]

       [range] & [options] [count] [flags]

       [range] ~ [options] [count] [flags]
	      Make substitutions.

       su[spend][!]

       st[op][!]

       <suspend>
	      Suspend the edit session.

       [Tt]a[g][!] tagstring
	      Edit the file containing the specified tag.

       tagn[ext][!]
	      Edit the file containing the next context for the current tag.

       tagp[op][!] [file | number]
	      Pop to the specified tag in the tags stack.

       tagp[rev][!]
	      Edit the file containing the previous context for the current tag.

       unm[ap][!] lhs
	      Unmap a mapped string.

       ve[rsion]
	      Display the version of the ex/vi editor.

       [line] vi[sual] [type] [count] [flags]
	      Ex mode only.  Enter vi.

       [Vi]i[sual][!] [+cmd] [file]
	      Vi mode only.  Edit a new file.

       viu[sage] [command]
	      Display usage for a vi command.

       [range] w[rite][!] [>>] [file]

       [range] w[rite] [!] [file]

       [range] wn[!] [>>] [file]

       [range] wq[!] [>>] [file]
	      Write the file.

       [range] x[it][!] [file]
	      Write the file if it has been modified.

       [range] ya[nk] [buffer] [count]
	      Copy the specified lines to a buffer.

       [line] z [type] [count] [flags]
	      Adjust the window.

SET OPTIONS
       There are a large number of options that may be set (or	unset)	to  change  the  editor's
       behavior.   This section describes the options, their abbreviations and their default val-
       ues.

       In each entry below, the first part of the tag line is the full name of the  option,  fol-
       lowed  by  any equivalent abbreviations.  The part in square brackets is the default value
       of the option.  Most of the options are boolean, i.e. they are either on or  off,  and  do
       not have an associated value.

       Options apply to both ex and vi modes, unless otherwise specified.

       altwerase [off]
	      Vi only.	Select an alternate word erase algorithm.

       autoindent, ai [off]
	      Automatically indent new lines.

       autoprint, ap [off]
	      Ex only.	Display the current line automatically.

       autowrite, aw [off]
	      Write modified files automatically when changing files.

       backup [""]
	      Backup files before they are overwritten.

       beautify, bf [off]
	      Discard control characters.

       cdpath [environment variable CDPATH, or current directory]
	      The directory paths used as path prefixes for the cd command.

       cedit [no default]
	      Set the character to edit the colon command-line history.

       columns, co [80]
	      Set the number of columns in the screen.

       comment [off]
	      Vi only.	Skip leading comments in shell, C and C++ language files.

       directory, dir [environment variable TMPDIR, or /tmp]
	      The directory where temporary files are created.

       edcompatible, ed [off]
	      Remember	the  values  of  the ``c'' and ``g'' suffices to the substitute commands,
	      instead of initializing them as unset for each new command.

       errorbells, eb [off]
	      Ex only.	Announce error messages with a bell.

       expandtab, et [off]
	      Prevent the use of <tab> characters  in  leading	whitespace  when  shifting  text,
	      autoindenting, indenting with <control-T>, or outdenting with <control-D>.

       exrc, ex [off]
	      Read the startup files in the local directory.

       extended [off]
	      Regular expressions are extended (i.e.  egrep(1)-style) expressions.

       filec [no default]
	      Set the character to perform file path completion on the colon command line.

       flash [on]
	      Flash the screen instead of beeping the keyboard on error.

       gtagsmode, gt [off]
	      Use GTAGS and GRTAGS instead of tags.

       hardtabs, ht [8]
	      Set the spacing between hardware tab settings.

       iclower [off]
	      Makes  all  Regular  Expressions	case-insensitive, as long as an upper-case letter
	      does not appear in the search string.

       ignorecase, ic [off]
	      Ignore case differences in regular expressions.

       keytime [6]
	      The 10th's of a second ex/vi waits for a subsequent key to complete a key mapping.

       leftright [off]
	      Vi only.	Do left-right scrolling.

       lines, li [24]
	      Vi only.	Set the number of lines in the screen.

       lisp [off]
	      Vi only.	Modify various search commands and  options  to  work  with  Lisp.   This
	      option is not yet implemented.

       list [off]
	      Display lines in an unambiguous fashion.

       lock [on]
	      Attempt to get an exclusive lock on any file being edited, read or written.

       magic [on]
	      Treat certain characters specially in regular expressions.

       matchchars [[]{}()<>]
	      Character pairs looked for by the % command.

       matchtime [7]
	      Vi  only.   The  10th's of a second ex/vi pauses on the matching character when the
	      showmatch option is set.

       mesg [on]
	      Permit messages from other users.

       modelines, modeline [off]
	      Read the first and last few lines of each file for ex commands.  This  option  will
	      never be implemented.

       noprint [""]
	      Characters that are never handled as printable characters.

       number, nu [off]
	      Precede each line displayed with its current line number.

       octal [off]
	      Display unknown characters as octal numbers, instead of the default hexadecimal.

       open [on]
	      Ex only.	If this option is not set, the open and visual commands are disallowed.

       optimize, opt [on]
	      Vi  only.   Optimize  text  throughput  to  dumb terminals.  This option is not yet
	      implemented.

       paragraphs, para [IPLPPPQPP LIpplpipbp]
	      Vi only.	Define additional paragraph boundaries for the { and } commands.

       path []
	      Define additional directories to search for files being edited.

       print [""]
	      Characters that are always handled as printable characters.

       prompt [on]
	      Ex only.	Display a command prompt.

       readonly, ro [off]
	      Mark the file and session as read-only.

       recdir [/var/tmp/vi.recover]
	      The directory where recovery files are stored.

       redraw, re [off]
	      Vi only.	Simulate an intelligent terminal on a dumb one.  This option is  not  yet
	      implemented.

       remap [on]
	      Remap keys until resolved.

       report [5]
	      Set the number of lines about which the editor reports changes or yanks.

       ruler [off]
	      Vi only.	Display a row/column ruler on the colon command line.

       scroll, scr [window / 2]
	      Set the number of lines scrolled.

       searchincr [off]
	      Makes the / and ?  commands incremental.

       sections, sect [NHSHH HUnhsh]
	      Vi only.	Define additional section boundaries for the [[ and ]] commands.

       secure [off]
	      Turns off all access to external programs.

       shell, sh [environment variable SHELL, or /bin/sh]
	      Select the shell used by the editor.

       shellmeta [~{[*?$`'"\]
	      Set the meta characters checked to determine if file name expansion is necessary.

       shiftwidth, sw [8]
	      Set the autoindent and shift command indentation width.

       showmatch, sm [off]
	      Vi only.	Note matching ``{'' and ``('' for ``}'' and ``)'' characters.

       showmode, smd [off]
	      Vi only.	Display the current editor mode and a ``modified'' flag.

       sidescroll [16]
	      Vi only.	Set the amount a left-right scroll will shift.

       slowopen, slow [off]
	      Delay display updating during text input.  This option is not yet implemented.

       sourceany [off]
	      Read startup files not owned by the current user.  This option will never be imple-
	      mented.

       tabstop, ts [8]
	      This option sets tab widths for the editor display.

       taglength, tl [0]
	      Set the number of significant characters in tag names.

       tags, tag [tags /var/db/libc.tags /sys/kern/tags]
	      Set the list of tags files.

       term, ttytype, tty [environment variable TERM]
	      Set the terminal type.

       terse [off]
	      This option has historically made editor messages less verbose.  It has  no  effect
	      in this implementation.

       tildeop [off]
	      Modify the ~ command to take an associated motion.

       timeout, to [on]
	      Time out on keys which may be mapped.

       ttywerase [off]
	      Vi only.	Select an alternate erase algorithm.

       verbose [off]
	      Vi only.	Display an error message for every error.

       w300 [no default]
	      Vi only.	Set the window size if the baud rate is less than 1200 baud.

       w1200 [no default]
	      Vi only.	Set the window size if the baud rate is equal to 1200 baud.

       w9600 [no default]
	      Vi only.	Set the window size if the baud rate is greater than 1200 baud.

       warn [on]
	      Ex only.	This option causes a warning message to the terminal if the file has been
	      modified, since it was last written, before a !  command.

       window, w, wi [environment variable LINES]
	      Set the window size for the screen.

       windowname [off]
	      Change the icon/window name to the current file name even if it can't  be  restored
	      on editor exit.

       wraplen, wl [0]
	      Vi only.	Break lines automatically, the specified number of columns from the left-
	      hand margin.  If both the wraplen and wrapmargin edit options are set, the wrapmar-
	      gin value is used.

       wrapmargin, wm [0]
	      Vi  only.   Break  lines	automatically,	the  specified number of columns from the
	      right-hand margin.  If both the wraplen and wrapmargin edit options  are	set,  the
	      wrapmargin value is used.

       wrapscan, ws [on]
	      Set searches to wrap around the end or beginning of the file.

       writeany, wa [off]
	      Turn off file-overwriting checks.

ENVIRONMENT VARIABLES
       COLUMNS
	      The  number  of columns on the screen.  This value overrides any system or terminal
	      specific values.	If the COLUMNS environmental variable is not set when ex/vi runs,
	      or  the columns option is explicitly reset by the user, ex/vi enters the value into
	      the environment.

       EXINIT A list of ex startup commands, read if the variable NEXINIT is not set.

       HOME   The user's home directory, used as the  initial  directory  path	for  the  startup
	      ``$HOME/.nexrc'' and ``$HOME/.exrc'' files.  This value is also used as the default
	      directory for the vi cd command.

       LINES  The number of rows on the screen.  This value overrides any system or terminal spe-
	      cific  values.   If the LINES environmental variable is not set when ex/vi runs, or
	      the lines option is explicitly reset by the user, ex/vi enters the value	into  the
	      environment.

       NEXINIT
	      A list of ex startup commands.

       SHELL  The user's shell of choice (see also the shell option).

       TERM   The  user's terminal type.  The default is the type ``unknown''.	If the TERM envi-
	      ronmental variable is not set when ex/vi runs, or the  term  option  is  explicitly
	      reset by the user, ex/vi enters the value into the environment.

       TMPDIR The location used to stored temporary files (see also the directory edit option).

ASYNCHRONOUS EVENTS
       SIGALRM
	      Vi/ex  uses  this  signal for periodic backups of file modifications and to display
	      ``busy'' messages when operations are likely to take a long time.

       SIGHUP

       SIGTERM
	      If the current buffer has changed since it was last written in  its  entirety,  the
	      editor  attempts	to  save the modified file so it can be later recovered.  See the
	      vi/ex Reference manual section entitled ``Recovery'' for more information.

       SIGINT When an interrupt occurs, the current operation is halted, and the  editor  returns
	      to  the command level.  If interrupted during text input, the text already input is
	      resolved into the file as if the text input had been normally terminated.

       SIGWINCH
	      The screen is resized.  See the vi/ex Reference manual  section  entitled  ``Sizing
	      the Screen'' for more information.

       SIGCONT

       SIGQUIT

       SIGTSTP
	      Vi/ex ignores these signals.

FILES
       /bin/sh
	      The default user shell.

       /etc/vi.exrc
	      System-wide vi startup file.

       /tmp   Temporary file directory.

       /var/tmp/vi.recover
	      The default recovery file directory.

       $HOME/.nexrc
	      1st choice for user's home directory startup file.

       $HOME/.exrc
	      2nd choice for user's home directory startup file.

       .nexrc 1st choice for local directory startup file.

       .exrc  2nd choice for local directory startup file.

SEE ALSO
       ctags(1), more(1), curses(3), dbopen(3)

       The ``Vi Quick Reference'' card.

       ``An  Introduction to Display Editing with Vi'', found in the ``UNIX User's Manual Supple-
       mentary Documents'' section of both the 4.3BSD and 4.4BSD manual sets.  This  document  is
       the closest thing available to an introduction to the vi screen editor.

       ``Ex  Reference	Manual	(Version  3.7)'', found in the ``UNIX User's Manual Supplementary
       Documents'' section of both the 4.3BSD and 4.4BSD manual sets.  This document is the final
       reference for the ex editor, as distributed in most historic 4BSD and System V systems.

       ``Edit:	A tutorial'', found in the ``UNIX User's Manual Supplementary Documents'' section
       of the 4.3BSD manual set.  This document is an introduction to a simple version of the  ex
       screen editor.

       ``Ex/Vi	Reference  Manual'',  found in the ``UNIX User's Manual Supplementary Documents''
       section of the 4.4BSD manual set.  This document is the final reference	for  the  nex/nvi
       text editors, as distributed in 4.4BSD and 4.4BSD-Lite.

       Roff  source  for  all  of  these documents is distributed with nex/nvi in the nvi/USD.doc
       directory of the nex/nvi source code.

       The  files  ``autowrite'',  ``input'',  ``quoting''  and  ``structures''  found	 in   the
       nvi/docs/internals directory of the nex/nvi source code.

HISTORY
       The nex/nvi replacements for the ex/vi editor first appeared in 4.4BSD.

STANDARDS
       Nex/nvi	is  close  to  IEEE Std1003.2 (``POSIX'').  That document differs from historical
       ex/vi practice in several places; there are changes to be made on both sides.

3rd Berkeley Distribution		       1Q1					    VI(1)


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