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OpenDarwin 7.2.1 - man page for less (opendarwin section 1)

LESS(1) 			     General Commands Manual				  LESS(1)

NAME
       less - opposite of more

SYNOPSIS
       less -?
       less --help
       less -V
       less --version
       less [-[+]aBcCdeEfFgGiIJmMnNqQrRsSuUVwWX~]
	    [-b space] [-h lines] [-j line] [-k keyfile]
	    [-{oO} logfile] [-p pattern] [-P prompt] [-t tag]
	    [-T tagsfile] [-x tab,...] [-y lines] [-[z] lines]
	    [-# shift] [+[+]cmd] [--] [filename]...
       (See the OPTIONS section for alternate option syntax with long option names.)

DESCRIPTION
       Less  is  a program similar to more (1), but which allows backward movement in the file as
       well as forward movement.  Also, less does not have to read the entire input  file  before
       starting,  so  with  large  input files it starts up faster than text editors like vi (1).
       Less uses termcap (or terminfo on some systems), so it can run on a variety of  terminals.
       There  is  even	limited  support  for hardcopy terminals.  (On a hardcopy terminal, lines
       which should be printed at the top of the screen are prefixed with a caret.)

       Commands are based on both more and vi.	Commands may be preceded  by  a  decimal  number,
       called N in the descriptions below.  The number is used by some commands, as indicated.

COMMANDS
       In  the	following  descriptions,  ^X means control-X.  ESC stands for the ESCAPE key; for
       example ESC-v means the two character sequence "ESCAPE", then "v".

       h or H Help: display a summary of these commands.  If you forget all the  other	commands,
	      remember this one.

       SPACE or ^V or f or ^F
	      Scroll  forward  N  lines,  default one window (see option -z below).  If N is more
	      than the screen size, only the final screenful is displayed.  Warning: some systems
	      use ^V as a special literalization character.

       z      Like SPACE, but if N is specified, it becomes the new window size.

       ESC-SPACE
	      Like  SPACE,  but  scrolls  a full screenful, even if it reaches end-of-file in the
	      process.

       RETURN or ^N or e or ^E or j or ^J
	      Scroll forward N lines, default 1.  The entire N lines are displayed, even if N  is
	      more than the screen size.

       d or ^D
	      Scroll forward N lines, default one half of the screen size.  If N is specified, it
	      becomes the new default for subsequent d and u commands.

       b or ^B or ESC-v
	      Scroll backward N lines, default one window (see option -z below).  If  N  is  more
	      than the screen size, only the final screenful is displayed.

       w      Like ESC-v, but if N is specified, it becomes the new window size.

       y or ^Y or ^P or k or ^K
	      Scroll backward N lines, default 1.  The entire N lines are displayed, even if N is
	      more than the screen size.  Warning: some systems use ^Y as a special  job  control
	      character.

       u or ^U
	      Scroll  backward	N lines, default one half of the screen size.  If N is specified,
	      it becomes the new default for subsequent d and u commands.

       ESC-) or RIGHTARROW
	      Scroll horizontally right N characters, default half the screen width (see  the  -#
	      option).	 If a number N is specified, it becomes the default for future RIGHTARROW
	      and LEFTARROW commands.  While the text is scrolled,  it	acts  as  though  the  -S
	      option (chop lines) were in effect.

       ESC-( or LEFTARROW
	      Scroll  horizontally  left  N characters, default half the screen width (see the -#
	      option).	If a number N is specified, it becomes the default for future  RIGHTARROW
	      and LEFTARROW commands.

       r or ^R or ^L
	      Repaint the screen.

       R      Repaint  the screen, discarding any buffered input.  Useful if the file is changing
	      while it is being viewed.

       F      Scroll forward, and keep trying to read when the end of file is reached.	 Normally
	      this  command  would  be	used when already at the end of the file.  It is a way to
	      monitor the tail of a file which is growing while it is being viewed.  (The  behav-
	      ior is similar to the "tail -f" command.)

       g or < or ESC-<
	      Go  to  line  N  in the file, default 1 (beginning of file).  (Warning: this may be
	      slow if N is large.)

       G or > or ESC->
	      Go to line N in the file, default the end of the file.  (Warning: this may be  slow
	      if  N is large, or if N is not specified and standard input, rather than a file, is
	      being read.)

       p or % Go to a position N percent into the file.  N should be between 0 and 100.

       {      If a left curly bracket appears in the top line displayed on the screen, the { com-
	      mand will go to the matching right curly bracket.  The matching right curly bracket
	      is positioned on the bottom line of the screen.  If there is  more  than	one  left
	      curly  bracket  on the top line, a number N may be used to specify the N-th bracket
	      on the line.

       }      If a right curly bracket appears in the bottom line displayed on the screen, the	}
	      command  will  go  to  the  matching  left  curly bracket.  The matching left curly
	      bracket is positioned on the top line of the screen.  If there  is  more	than  one
	      right  curly  bracket  on  the top line, a number N may be used to specify the N-th
	      bracket on the line.

       (      Like {, but applies to parentheses rather than curly brackets.

       )      Like }, but applies to parentheses rather than curly brackets.

       [      Like {, but applies to square brackets rather than curly brackets.

       ]      Like }, but applies to square brackets rather than curly brackets.

       ESC-^F Followed by two characters, acts like {, but uses the two characters  as	open  and
	      close  brackets,	respectively.  For example, "ESC ^F < >" could be used to go for-
	      ward to the > which matches the < in the top displayed line.

       ESC-^B Followed by two characters, acts like }, but uses the two characters  as	open  and
	      close  brackets, respectively.  For example, "ESC ^B < >" could be used to go back-
	      ward to the < which matches the > in the bottom displayed line.

       m      Followed by any lowercase letter, marks the current position with that letter.

       '      (Single quote.)  Followed by any lowercase letter, returns to  the  position  which
	      was  previously marked with that letter.	Followed by another single quote, returns
	      to the position at which the last "large" movement command was executed.	 Followed
	      by  a  ^	or  $, jumps to the beginning or end of the file respectively.	Marks are
	      preserved when a new file is examined, so the '  command	can  be  used  to  switch
	      between input files.

       ^X^X   Same as single quote.

       /pattern
	      Search forward in the file for the N-th line containing the pattern.  N defaults to
	      1.  The pattern is a regular expression, as recognized by ed.  The search starts at
	      the second line displayed (but see the -a and -j options, which change this).

	      Certain  characters  are	special  if entered at the beginning of the pattern; they
	      modify the type of search rather than become part of the pattern:

	      ^N or !
		     Search for lines which do NOT match the pattern.

	      ^E or *
		     Search multiple files.  That is, if the search reaches the END of	the  cur-
		     rent  file without finding a match, the search continues in the next file in
		     the command line list.

	      ^F or @
		     Begin the search at the first line of the FIRST file  in  the  command  line
		     list,  regardless	of  what is currently displayed on the screen or the set-
		     tings of the -a or -j options.

	      ^K     Highlight any text which matches the pattern  on  the  current  screen,  but
		     don't move to the first match (KEEP current position).

	      ^R     Don't interpret regular expression metacharacters; that is, do a simple tex-
		     tual comparison.

       ?pattern
	      Search backward in the file for the N-th line containing the pattern.   The  search
	      starts at the line immediately before the top line displayed.

	      Certain characters are special as in the / command:

	      ^N or !
		     Search for lines which do NOT match the pattern.

	      ^E or *
		     Search  multiple files.  That is, if the search reaches the beginning of the
		     current file without finding a match, the search continues in  the  previous
		     file in the command line list.

	      ^F or @
		     Begin the search at the last line of the last file in the command line list,
		     regardless of what is currently displayed on the screen or the  settings  of
		     the -a or -j options.

	      ^K     As in forward searches.

	      ^R     As in forward searches.

       ESC-/pattern
	      Same as "/*".

       ESC-?pattern
	      Same as "?*".

       n      Repeat previous search, for N-th line containing the last pattern.  If the previous
	      search was modified by ^N, the search is made for the N-th line NOT containing  the
	      pattern.	 If  the  previous search was modified by ^E, the search continues in the
	      next (or previous) file if not satisfied in the  current	file.	If  the  previous
	      search  was  modified  by ^R, the search is done without using regular expressions.
	      There is no effect if the previous search was modified by ^F or ^K.

       N      Repeat previous search, but in the reverse direction.

       ESC-n  Repeat previous search, but crossing file boundaries.  The effect is as if the pre-
	      vious search were modified by *.

       ESC-N  Repeat previous search, but in the reverse direction and crossing file boundaries.

       ESC-u  Undo  search  highlighting.   Turn off highlighting of strings matching the current
	      search pattern.  If highlighting is already off because of a  previous  ESC-u  com-
	      mand,  turn  highlighting  back on.  Any search command will also turn highlighting
	      back on.	(Highlighting can also be disabled by toggling the  -G	option;  in  that
	      case search commands do not turn highlighting back on.)

       :e [filename]
	      Examine a new file.  If the filename is missing, the "current" file (see the :n and
	      :p commands below) from the list of files in the command line  is  re-examined.	A
	      percent  sign  (%)  in the filename is replaced by the name of the current file.	A
	      pound sign (#) is replaced by the name of the previously examined  file.	 However,
	      two consecutive percent signs are simply replaced with a single percent sign.  This
	      allows you to enter a filename that contains a percent sign  in  the  name.   Simi-
	      larly,  two  consecutive	pound  signs  are replaced with a single pound sign.  The
	      filename is inserted into the command line list of files so that it can be seen  by
	      subsequent :n and :p commands.  If the filename consists of several files, they are
	      all inserted into the list of files and the first one is examined.  If the filename
	      contains	one  or  more  spaces,	the  entire filename should be enclosed in double
	      quotes (also see the -" option).

       ^X^V or E
	      Same as :e.  Warning: some systems use ^V as a  special  literalization  character.
	      On such systems, you may not be able to use ^V.

       :n     Examine  the  next  file	(from the list of files given in the command line).  If a
	      number N is specified, the N-th next file is examined.

       :p     Examine the previous file in the command line list.  If a number	N  is  specified,
	      the N-th previous file is examined.

       :x     Examine  the  first file in the command line list.  If a number N is specified, the
	      N-th file in the list is examined.

       :d     Remove the current file from the list of files.

       t      Go to the next tag, if there were more than one matches for the current  tag.   See
	      the -t option for more details about tags.

       T      Go to the previous tag, if there were more than one matches for the current tag.

       = or ^G or :f
	      Prints  some  information  about	the file being viewed, including its name and the
	      line number and byte offset of the bottom line being displayed.	If  possible,  it
	      also prints the length of the file, the number of lines in the file and the percent
	      of the file above the last displayed line.

       -      Followed by one of the command line option letters (see OPTIONS below),  this  will
	      change  the  setting of that option and print a message describing the new setting.
	      If a ^P (CONTROL-P) is entered immediately after	the  dash,  the  setting  of  the
	      option  is  changed  but no message is printed.  If the option letter has a numeric
	      value (such as -b or -h), or a string value (such as -P or -t), a new value may  be
	      entered  after the option letter.  If no new value is entered, a message describing
	      the current setting is printed and nothing is changed.

       --     Like the - command, but takes a long option name (see OPTIONS below) rather than	a
	      single  option  letter.	You must press RETURN after typing the option name.  A ^P
	      immediately after the second dash suppresses printing of a message  describing  the
	      new setting, as in the - command.

       -+     Followed	by  one  of the command line option letters this will reset the option to
	      its default setting and print a message describing the  new  setting.   (The  "-+X"
	      command  does the same thing as "-+X" on the command line.)  This does not work for
	      string-valued options.

       --+    Like the -+ command, but takes a long option name rather than a single option  let-
	      ter.

       -!     Followed	by  one of the command line option letters, this will reset the option to
	      the "opposite" of its default setting and print a message describing the	new  set-
	      ting.  This does not work for numeric or string-valued options.

       --!    Like  the -! command, but takes a long option name rather than a single option let-
	      ter.

       _      (Underscore.)  Followed by one of the command line option letters, this will  print
	      a message describing the current setting of that option.	The setting of the option
	      is not changed.

       __     (Double underscore.)  Like the _ (underscore) command, but takes a long option name
	      rather  than a single option letter.  You must press RETURN after typing the option
	      name.

       +cmd   Causes the specified cmd to be executed each time a  new	file  is  examined.   For
	      example,	+G  causes less to initially display each file starting at the end rather
	      than the beginning.

       V      Prints the version number of less being run.

       q or Q or :q or :Q or ZZ
	      Exits less.

       The following four commands may or may not be valid, depending on your particular  instal-
       lation.

       v      Invokes  an editor to edit the current file being viewed.  The editor is taken from
	      the environment variable VISUAL if defined, or EDITOR if VISUAL is not defined,  or
	      defaults	to "vi" if neither VISUAL nor EDITOR is defined.  See also the discussion
	      of LESSEDIT under the section on PROMPTS below.

       ! shell-command
	      Invokes a shell to run the shell-command given.  A percent sign (%) in the  command
	      is  replaced  by the name of the current file.  A pound sign (#) is replaced by the
	      name of the previously examined file.  "!!" repeats the last  shell  command.   "!"
	      with  no shell command simply invokes a shell.  On Unix systems, the shell is taken
	      from the environment variable SHELL, or defaults to "sh".  On MS-DOS and OS/2  sys-
	      tems, the shell is the normal command processor.

       | <m> shell-command
	      <m>  represents  any  mark  letter.  Pipes a section of the input file to the given
	      shell command.  The section of the file to be piped is between the  first  line  on
	      the  current  screen and the position marked by the letter.  <m> may also be ^ or $
	      to indicate beginning or end of file respectively.  If <m> is  .	or  newline,  the
	      current screen is piped.

       s filename
	      Save  the input to a file.  This only works if the input is a pipe, not an ordinary
	      file.

OPTIONS
       Command line options are described below.  Most options may be changed while less is  run-
       ning, via the "-" command.

       Most  options may be given in one of two forms: either a dash followed by a single letter,
       or two dashes followed by a long option name.  A long option name may  be  abbreviated  as
       long  as  the  abbreviation is unambiguous.  For example, --quit-at-eof may be abbreviated
       --quit, but not --qui, since both --quit-at-eof and --quiet begin with --qui.   Some  long
       option  names  are  in  uppercase,  such as --QUIT-AT-EOF, as distinct from --quit-at-eof.
       Such option names need only have their first letter capitalized; the remainder of the name
       may be in either case.  For example, --Quit-at-eof is equivalent to --QUIT-AT-EOF.

       Options are also taken from the environment variable "LESS".  For example, to avoid typing
       "less -options ..." each time less is invoked, you might tell csh:

       setenv LESS "-options"

       or if you use sh:

       LESS="-options"; export LESS

       On MS-DOS, you don't need the quotes, but you should replace  any  percent  signs  in  the
       options string by double percent signs.

       The  environment variable is parsed before the command line, so command line options over-
       ride the LESS environment variable.  If an option appears in the LESS variable, it can  be
       reset  to  its default value on the command line by beginning the command line option with
       "-+".

       For options like -P or -D which take a following string, a dollar sign ($) must be used to
       signal the end of the string.  For example, to set two -D options on MS-DOS, you must have
       a dollar sign between them, like this:

       LESS="-Dn9.1$-Ds4.1"

       -? or --help
	      This option displays a summary of the commands accepted by less (the same as the	h
	      command).   (Depending  on  how  your shell interprets the question mark, it may be
	      necessary to quote the question mark, thus: "-\?".)

       -a or --search-skip-screen
	      Causes searches to start after the last line displayed on the screen, thus skipping
	      all  lines  displayed on the screen.  By default, searches start at the second line
	      on the screen (or after the last found line; see the -j option).

       -bn or --buffers=n
	      Specifies the amount of buffer space less will use for each file, in units of kilo-
	      bytes  (1024  bytes).  By default 64K of buffer space is used for each file (unless
	      the file is a pipe; see the -B option).  The -b option  specifies  instead  that	n
	      kilobytes  of  buffer space should be used for each file.  If n is -1, buffer space
	      is unlimited; that is, the entire file is read into memory.

       -B or --auto-buffers
	      By default, when data is read from a pipe, buffers are allocated	automatically  as
	      needed.	If  a  large amount of data is read from the pipe, this can cause a large
	      amount of memory to be allocated.  The -B option disables this automatic allocation
	      of  buffers for pipes, so that only 64K (or the amount of space specified by the -b
	      option) is used for the pipe.  Warning: use of -B can result in erroneous  display,
	      since only the most recently viewed part of the file is kept in memory; any earlier
	      data is lost.

       -c or --clear-screen
	      Causes full screen repaints to be painted from the top line down.  By default, full
	      screen repaints are done by scrolling from the bottom of the screen.

       -C or --CLEAR-SCREEN
	      The -C option is like -c, but the screen is cleared before it is repainted.

       -d or --dumb
	      The  -d  option  suppresses the error message normally displayed if the terminal is
	      dumb; that is, lacks some important capability, such as the ability  to  clear  the
	      screen or scroll backward.  The -d option does not otherwise change the behavior of
	      less on a dumb terminal.

       -Dxcolor or --color=xcolor
	      [MS-DOS only] Sets the color of the text displayed.  x is a single character  which
	      selects  the  type  of text whose color is being set: n=normal, s=standout, d=bold,
	      u=underlined, k=blink.  color is a pair of numbers  separated  by  a  period.   The
	      first  number  selects  the  foreground color and the second selects the background
	      color of the text.  A single number N is the same as N.0.

       -e or --quit-at-eof
	      Causes less to automatically exit the  second  time  it  reaches	end-of-file.   By
	      default, the only way to exit less is via the "q" command.

       -E or --QUIT-AT-EOF
	      Causes less to automatically exit the first time it reaches end-of-file.

       -f or --force
	      Forces  non-regular  files  to  be opened.  (A non-regular file is a directory or a
	      device special file.)  Also suppresses the warning message when a  binary  file  is
	      opened.  By default, less will refuse to open non-regular files.

       -F or --quit-if-one-screen
	      Causes  less to automatically exit if the entire file can be displayed on the first
	      screen.

       -g or --hilite-search
	      Normally, less will highlight ALL strings which match the last search command.  The
	      -g  option  changes this behavior to highlight only the particular string which was
	      found by the last search command.  This can cause less to run somewhat faster  than
	      the default.

       -G or --HILITE-SEARCH
	      The -G option suppresses all highlighting of strings found by search commands.

       -hn or ---max-back-scroll=n
	      Specifies  a  maximum  number  of  lines to scroll backward.  If it is necessary to
	      scroll backward more than n lines, the screen is repainted in a  forward	direction
	      instead.	 (If  the  terminal  does not have the ability to scroll backward, -h0 is
	      implied.)

       -i or --ignore-case
	      Causes searches to ignore case; that is, uppercase  and  lowercase  are  considered
	      identical.   This  option  is ignored if any uppercase letters appear in the search
	      pattern; in other words, if a pattern contains uppercase letters, then that  search
	      does not ignore case.

       -I or --IGNORE-CASE
	      Like -i, but searches ignore case even if the pattern contains uppercase letters.

       -jn or --jump-target=n
	      Specifies a line on the screen where the "target" line is to be positioned.  A tar-
	      get line is the object of a text search, tag search, jump to a line number, jump to
	      a file percentage, or jump to a marked position.	The screen line is specified by a
	      number: the top line on the screen is 1, the next is 2, and so on.  The number  may
	      be negative to specify a line relative to the bottom of the screen: the bottom line
	      on the screen is -1, the second to the bottom is -2, and so on.  If the  -j  option
	      is  used,  searches begin at the line immediately after the target line.	For exam-
	      ple, if "-j4" is used, the target line  is  the  fourth  line  on  the  screen,  so
	      searches begin at the fifth line on the screen.

       -J or --status-column
	      Displays	a  status column at the left edge of the screen.  The status column shows
	      the lines that matched the current search.  The status column is also used  if  the
	      -w or -W option is in effect.

       -kfilename or --lesskey-file=filename
	      Causes  less  to open and interpret the named file as a lesskey (1) file.  Multiple
	      -k options may be specified.  If the LESSKEY or LESSKEY_SYSTEM environment variable
	      is set, or if a lesskey file is found in a standard place (see KEY BINDINGS), it is
	      also used as a lesskey file.

       -m or --long-prompt
	      Causes less to prompt verbosely (like more), with the percent into  the  file.   By
	      default, less prompts with a colon.

       -M or --LONG-PROMPT
	      Causes less to prompt even more verbosely than more.

       -n or --line-numbers
	      Suppresses  line	numbers.  The default (to use line numbers) may cause less to run
	      more slowly in some cases, especially with a very large  input  file.   Suppressing
	      line numbers with the -n option will avoid this problem.	Using line numbers means:
	      the line number will be displayed in the verbose prompt and in the =  command,  and
	      the v command will pass the current line number to the editor (see also the discus-
	      sion of LESSEDIT in PROMPTS below).

       -N or --LINE-NUMBERS
	      Causes a line number to be displayed at the beginning of each line in the display.

       -ofilename or --log-file=filename
	      Causes less to copy its input to the named  file	as  it	is  being  viewed.   This
	      applies  only  when  the	input  file is a pipe, not an ordinary file.  If the file
	      already exists, less will ask for confirmation before overwriting it.

       -Ofilename or --LOG-FILE=filename
	      The -O option is like -o, but it will overwrite an existing file without asking for
	      confirmation.

	      If  no  log  file has been specified, the -o and -O options can be used from within
	      less to specify a log file.  Without a file name, they will simply report the  name
	      of the log file.	The "s" command is equivalent to specifying -o from within less.

       -ppattern or --pattern=pattern
	      The  -p  option on the command line is equivalent to specifying +/pattern; that is,
	      it tells less to start at the first occurrence of pattern in the file.

       -Pprompt or --prompt=prompt
	      Provides a way to tailor the three prompt styles	to  your  own  preference.   This
	      option  would  normally  be put in the LESS environment variable, rather than being
	      typed in with each less command.	Such an option must either be the last option  in
	      the  LESS  variable,  or	be terminated by a dollar sign.  -Ps followed by a string
	      changes the default (short) prompt to that string.  -Pm  changes	the  medium  (-m)
	      prompt.	-PM  changes  the  long (-M) prompt.  -Ph changes the prompt for the help
	      screen.  -P= changes the message printed by the = command.  -Pw changes the message
	      printed while waiting for data (in the F command).  All prompt strings consist of a
	      sequence of letters and special escape sequences.  See the section on  PROMPTS  for
	      more details.

       -q or --quiet or --silent
	      Causes moderately "quiet" operation: the terminal bell is not rung if an attempt is
	      made to scroll past the end of the file or before the beginning of  the  file.   If
	      the  terminal  has  a  "visual bell", it is used instead.  The bell will be rung on
	      certain other errors, such as typing an invalid character.  The default is to  ring
	      the terminal bell in all such cases.

       -Q or --QUIET or --SILENT
	      Causes totally "quiet" operation: the terminal bell is never rung.

       -r or --raw-control-chars
	      Causes "raw" control characters to be displayed.	The default is to display control
	      characters using the caret notation; for example, a control-A (octal 001)  is  dis-
	      played as "^A".  Warning: when the -r option is used, less cannot keep track of the
	      actual appearance of the screen (since this depends on how the screen  responds  to
	      each  type  of control character).  Thus, various display problems may result, such
	      as long lines being split in the wrong place.

       -R or --RAW-CONTROL-CHARS
	      Like -r, but tries to keep track of the screen  appearance  where  possible.   This
	      works  only  if  the  input  consists of normal text and possibly some ANSI "color"
	      escape sequences, which are sequences of the form:

		   ESC [ ... m

	      where the "..." is zero or more characters other than  "m".   For  the  purpose  of
	      keeping  track  of  screen  appearance,  all  control characters and all ANSI color
	      escape sequences are assumed to not move the cursor.  You can make less think  that
	      characters  other than "m" can end ANSI color escape sequences by setting the envi-
	      ronment variable LESSANSIENDCHARS to the list of characters which can end  a  color
	      escape sequence.

       -s or --squeeze-blank-lines
	      Causes  consecutive  blank  lines to be squeezed into a single blank line.  This is
	      useful when viewing nroff output.

       -S or --chop-long-lines
	      Causes lines longer than the screen width to be chopped rather than  folded.   That
	      is,  the remainder of a long line is simply discarded.  The default is to fold long
	      lines; that is, display the remainder on the next line.

       -ttag or --tag=tag
	      The -t option, followed immediately by a TAG, will edit the  file  containing  that
	      tag.   For  this to work, tag information must be available; for example, there may
	      be a file in the current directory called "tags", which  was  previously	built  by
	      ctags  (1) or an equivalent command.  If the environment variable LESSGLOBALTAGS is
	      set, it is taken to be the name of a command compatible with global (1),	and  that
	      command	is   executed	to   find   the   tag.	  (See	 http://www.gnu.org/soft-
	      ware/global/global.html).  The -t option may also be  specified  from  within  less
	      (using the - command) as a way of examining a new file.  The command ":t" is equiv-
	      alent to specifying -t from within less.

       -Ttagsfile or --tag-file=tagsfile
	      Specifies a tags file to be used instead of "tags".

       -u or --underline-special
	      Causes backspaces and carriage returns to be treated as printable characters;  that
	      is, they are sent to the terminal when they appear in the input.

       -U or --UNDERLINE-SPECIAL
	      Causes  backspaces,  tabs and carriage returns to be treated as control characters;
	      that is, they are handled as specified by the -r option.

	      By default, if neither -u nor -U is given, backspaces which appear adjacent  to  an
	      underscore  character are treated specially: the underlined text is displayed using
	      the terminal's hardware underlining  capability.	 Also,	backspaces  which  appear
	      between  two  identical  characters  are	treated specially: the overstruck text is
	      printed using the terminal's hardware boldface capability.   Other  backspaces  are
	      deleted, along with the preceding character.  Carriage returns immediately followed
	      by a newline are deleted.  other carriage returns are handled as specified  by  the
	      -r  option.   Text which is overstruck or underlined can be searched for if neither
	      -u nor -U is in effect.

       -V or --version
	      Displays the version number of less.

       -w or --hilite-unread
	      Temporarily highlights the first "new" line after a  forward  movement  of  a  full
	      page.   The  first "new" line is the line immediately following the line previously
	      at the bottom of the screen.  Also highlights the target line after a g or  p  com-
	      mand.   The  highlight  is  removed at the next command which causes movement.  The
	      entire line is highlighted, unless the -J option is in effect, in which  case  only
	      the status column is highlighted.

       -W or --HILITE-UNREAD
	      Like  -w,  but temporarily highlights the first new line after any forward movement
	      command larger than one line.

       -xn,... or --tabs=n,...
	      Sets tab stops.  If only one n is specified, tab stops are set at multiples  of  n.
	      If  multiple  values  separated by commas are specified, tab stops are set at those
	      positions, and then continue with the same spacing as the last two.   For  example,
	      -x9,17 will set tabs at positions 9, 17, 25, 33, etc.  The default for n is 8.

       -X or --no-init
	      Disables	sending  the  termcap  initialization and deinitialization strings to the
	      terminal.  This is sometimes desirable if the deinitialization  string  does  some-
	      thing unnecessary, like clearing the screen.

       --no-keypad
	      Disables sending the keypad initialization and deinitialization strings to the ter-
	      minal.  This is sometimes useful if the keypad  strings  make  the  numeric  keypad
	      behave in an undesirable manner.

       -yn or --max-forw-scroll=n
	      Specifies  a  maximum  number  of  lines	to scroll forward.  If it is necessary to
	      scroll forward more than n lines, the screen is repainted instead.  The  -c  or  -C
	      option  may  be used to repaint from the top of the screen if desired.  By default,
	      any forward movement causes scrolling.

       -[z]n or --window=n
	      Changes the default scrolling window size to n lines.  The default is  one  screen-
	      ful.  The z and w commands can also be used to change the window size.  The "z" may
	      be omitted for compatibility with more.  If the number n is negative, it	indicates
	      n lines less than the current screen size.  For example, if the screen is 24 lines,
	      -z-4 sets the scrolling window to 20 lines.  If the screen is resized to 40  lines,
	      the scrolling window automatically changes to 36 lines.

       -"cc or --quotes=cc
	      Changes the filename quoting character.  This may be necessary if you are trying to
	      name a file which contains both spaces and quote characters.  Followed by a  single
	      character,  this changes the quote character to that character.  Filenames contain-
	      ing a space should then be surrounded by	that  character  rather  than  by  double
	      quotes.  Followed by two characters, changes the open quote to the first character,
	      and the close quote to the second character.  Filenames containing a  space  should
	      then  be preceded by the open quote character and followed by the close quote char-
	      acter.  Note that even after the quote characters are changed, this option  remains
	      -" (a dash followed by a double quote).

       -~ or --tilde
	      Normally	lines after end of file are displayed as a single tilde (~).  This option
	      causes lines after end of file to be displayed as blank lines.

       -# or --shift
	      Specifies the default number of positions to scroll horizontally in the  RIGHTARROW
	      and  LEFTARROW commands.	If the number specified is zero, it sets the default num-
	      ber of positions to one half of the screen width.

       --     A command line argument of "--" marks the end of option arguments.   Any	arguments
	      following  this  are  interpreted  as filenames.	This can be useful when viewing a
	      file whose name begins with a "-" or "+".

       +      If a command line option begins with +, the remainder of that option is taken to be
	      an  initial command to less.  For example, +G tells less to start at the end of the
	      file rather than the beginning, and +/xyz tells it to start at the first occurrence
	      of  "xyz" in the file.  As a special case, +<number> acts like +<number>g; that is,
	      it starts the display at the specified line number (however, see the  caveat  under
	      the  "g" command above).	If the option starts with ++, the initial command applies
	      to every file being viewed, not just the first one.  The + command described previ-
	      ously may also be used to set (or change) an initial command for every file.

LINE EDITING
       When entering command line at the bottom of the screen (for example, a filename for the :e
       command, or the pattern for a search command), certain keys can be used to manipulate  the
       command line.  Most commands have an alternate form in [ brackets ] which can be used if a
       key does not exist on a particular keyboard.  (The bracketed forms do not work in the  MS-
       DOS version.)  Any of these special keys may be entered literally by preceding it with the
       "literal" character, either ^V or ^A.  A backslash itself may also be entered literally by
       entering two backslashes.

       LEFTARROW [ ESC-h ]
	      Move the cursor one space to the left.

       RIGHTARROW [ ESC-l ]
	      Move the cursor one space to the right.

       ^LEFTARROW [ ESC-b or ESC-LEFTARROW ]
	      (That  is,  CONTROL and LEFTARROW simultaneously.)  Move the cursor one word to the
	      left.

       ^RIGHTARROW [ ESC-w or ESC-RIGHTARROW ]
	      (That is, CONTROL and RIGHTARROW simultaneously.)  Move the cursor one word to  the
	      right.

       HOME [ ESC-0 ]
	      Move the cursor to the beginning of the line.

       END [ ESC-$ ]
	      Move the cursor to the end of the line.

       BACKSPACE
	      Delete  the  character to the left of the cursor, or cancel the command if the com-
	      mand line is empty.

       DELETE or [ ESC-x ]
	      Delete the character under the cursor.

       ^BACKSPACE [ ESC-BACKSPACE ]
	      (That is, CONTROL and BACKSPACE simultaneously.)	Delete the word to  the  left  of
	      the cursor.

       ^DELETE [ ESC-X or ESC-DELETE ]
	      (That is, CONTROL and DELETE simultaneously.)  Delete the word under the cursor.

       UPARROW [ ESC-k ]
	      Retrieve the previous command line.

       DOWNARROW [ ESC-j ]
	      Retrieve the next command line.

       TAB    Complete	the  partial filename to the left of the cursor.  If it matches more than
	      one filename, the first match is entered into the command line.  Repeated TABs will
	      cycle thru the other matching filenames.	If the completed filename is a directory,
	      a "/" is appended to the filename.  (On MS-DOS systems, a "\"  is  appended.)   The
	      environment  variable LESSSEPARATOR can be used to specify a different character to
	      append to a directory name.

       BACKTAB [ ESC-TAB ]
	      Like, TAB, but cycles in the reverse direction thru the matching filenames.

       ^L     Complete the partial filename to the left of the cursor.	If it matches  more  than
	      one filename, all matches are entered into the command line (if they fit).

       ^U (Unix and OS/2) or ESC (MS-DOS)
	      Delete the entire command line, or cancel the command if the command line is empty.
	      If you have changed your line-kill character in Unix to something  other	than  ^U,
	      that character is used instead of ^U.

KEY BINDINGS
       You may define your own less commands by using the program lesskey (1) to create a lesskey
       file.  This file specifies a set of command keys and an action associated with  each  key.
       You  may  also  use lesskey to change the line-editing keys (see LINE EDITING), and to set
       environment variables.  If the environment variable LESSKEY is set, less uses that as  the
       name of the lesskey file.  Otherwise, less looks in a standard place for the lesskey file:
       On Unix systems, less looks for a lesskey file called "$HOME/.less".  On MS-DOS	and  Win-
       dows  systems,  less looks for a lesskey file called "$HOME/_less", and if it is not found
       there, then looks for a lesskey file called "_less" in any directory specified in the PATH
       environment   variable.	  On   OS/2  systems,  less  looks  for  a  lesskey  file  called
       "$HOME/less.ini", and if it is not found, then looks for a lesskey file called  "less.ini"
       in  any	directory  specified in the INIT environment variable, and if it not found there,
       then looks for a lesskey file called "less.ini" in any directory  specified  in	the  PATH
       environment variable.  See the lesskey manual page for more details.

       A  system-wide  lesskey	file  may  also  be  set up to provide key bindings.  If a key is
       defined in both a local lesskey file and in the system-wide  file,  key	bindings  in  the
       local  file  take precedence over those in the system-wide file.  If the environment vari-
       able LESSKEY_SYSTEM is set, less uses that as the name of the  system-wide  lesskey  file.
       Otherwise,  less  looks in a standard place for the system-wide lesskey file: On Unix sys-
       tems, the system-wide lesskey file is /usr/local/etc/sysless.  (However, if less was built
       with  a	different sysconf directory than /usr/local/etc, that directory is where the sys-
       less file is found.)  On MS-DOS and Windows  systems,  the  system-wide	lesskey  file  is
       c:\_sysless.  On OS/2 systems, the system-wide lesskey file is c:\sysless.ini.

INPUT PREPROCESSOR
       You may define an "input preprocessor" for less.  Before less opens a file, it first gives
       your input preprocessor a chance to modify the way the contents of the file are displayed.
       An  input preprocessor is simply an executable program (or shell script), which writes the
       contents of the file to a different file, called the replacement file.	The  contents  of
       the  replacement  file  are  then displayed in place of the contents of the original file.
       However, it will appear to the user as if the original file is opened; that is, less  will
       display the original filename as the name of the current file.

       An  input  preprocessor	receives  one  command	line  argument, the original filename, as
       entered by the user.  It should create the replacement file, and when finished, print  the
       name  of  the replacement file to its standard output.  If the input preprocessor does not
       output a replacement filename, less uses the original file, as  normal.	 The  input  pre-
       processor is not called when viewing standard input.  To set up an input preprocessor, set
       the LESSOPEN environment variable to a command line which  will	invoke	your  input  pre-
       processor.  This command line should include one occurrence of the string "%s", which will
       be replaced by the filename when the input preprocessor command is invoked.

       When less closes a file opened in such a way, it will call  another  program,  called  the
       input  postprocessor,  which may perform any desired clean-up action (such as deleting the
       replacement file created by LESSOPEN).  This program receives two command line  arguments,
       the  original  filename	as entered by the user, and the name of the replacement file.  To
       set up an input postprocessor, set the LESSCLOSE environment variable to  a  command  line
       which  will invoke your input postprocessor.  It may include two occurrences of the string
       "%s"; the first is replaced with the original name of the file and  the	second	with  the
       name of the replacement file, which was output by LESSOPEN.

       For  example, on many Unix systems, these two scripts will allow you to keep files in com-
       pressed format, but still let less view them directly:

       lessopen.sh:
	    #! /bin/sh
	    case "$1" in
	    *.Z) uncompress -c $1  >/tmp/less.$$  2>/dev/null
		 if [ -s /tmp/less.$$ ]; then
		      echo /tmp/less.$$
		 else
		      rm -f /tmp/less.$$
		 fi
		 ;;
	    esac

       lessclose.sh:
	    #! /bin/sh
	    rm $2

       To  use	these  scripts,  put  them  both   where   they   can	be   executed	and   set
       LESSOPEN="lessopen.sh %s",  and LESSCLOSE="lessclose.sh %s %s".	More complex LESSOPEN and
       LESSCLOSE scripts may be written to accept other types of compressed files, and so on.

       It is also possible to set up an input preprocessor to pipe  the  file  data  directly  to
       less,  rather  than  putting  the  data	into a replacement file.  This avoids the need to
       decompress the entire file before starting to view it.  An input preprocessor  that  works
       this  way  is  called  an  input  pipe.	 An  input pipe, instead of writing the name of a
       replacement file on its standard output, writes the entire  contents  of  the  replacement
       file on its standard output.  If the input pipe does not write any characters on its stan-
       dard output, then there is no replacement file and less uses the original file, as normal.
       To use an input pipe, make the first character in the LESSOPEN environment variable a ver-
       tical bar (|) to signify that the input preprocessor is an input pipe.

       For example, on many Unix systems,  this  script  will  work  like  the	previous  example
       scripts:

       lesspipe.sh:
	    #! /bin/sh
	    case "$1" in
	    *.Z) uncompress -c $1  2>/dev/null
		 ;;
	    esac

       To  use	this  script, put it where it can be executed and set LESSOPEN="|lesspipe.sh %s".
       When an input pipe is used, a LESSCLOSE postprocessor can be used, but it is  usually  not
       necessary  since  there is no replacement file to clean up.  In this case, the replacement
       file name passed to the LESSCLOSE postprocessor is "-".

NATIONAL CHARACTER SETS
       There are three types of characters in the input file:

       normal characters
	      can be displayed directly to the screen.

       control characters
	      should not be displayed directly, but are expected to be	found  in  ordinary  text
	      files (such as backspace and tab).

       binary characters
	      should not be displayed directly and are not expected to be found in text files.

       A "character set" is simply a description of which characters are to be considered normal,
       control, and binary.  The LESSCHARSET environment variable may be used to select a charac-
       ter set.  Possible values for LESSCHARSET are:

       ascii  BS, TAB, NL, CR, and formfeed are control characters, all chars with values between
	      32 and 126 are normal, and all others are binary.

       iso8859
	      Selects an ISO 8859 character set.  This is the same as  ASCII,  except  characters
	      between 160 and 255 are treated as normal characters.

       latin1 Same as iso8859.

       latin9 Same as iso8859.

       dos    Selects a character set appropriate for MS-DOS.

       ebcdic Selects an EBCDIC character set.

       IBM-1047
	      Selects  an  EBCDIC character set used by OS/390 Unix Services.  This is the EBCDIC
	      analogue of latin1.  You get similar results by setting either LESSCHARSET=IBM-1047
	      or LC_CTYPE=en_US in your environment.

       koi8-r Selects a Russian character set.

       next   Selects a character set appropriate for NeXT computers.

       utf-8  Selects the UTF-8 encoding of the ISO 10646 character set.

       In  special  cases, it may be desired to tailor less to use a character set other than the
       ones definable by LESSCHARSET.  In this case, the environment variable LESSCHARDEF can  be
       used  to define a character set.  It should be set to a string where each character in the
       string represents one character in the character set.  The character "."  is  used  for	a
       normal  character,  "c" for control, and "b" for binary.  A decimal number may be used for
       repetition.  For example, "bccc4b." would mean character 0 is binary, 1, 2 and 3 are  con-
       trol,  4, 5, 6 and 7 are binary, and 8 is normal.  All characters after the last are taken
       to be the same as the last, so characters 9 through 255 would  be  normal.   (This  is  an
       example, and does not necessarily represent any real character set.)

       This table shows the value of LESSCHARDEF which is equivalent to each of the possible val-
       ues for LESSCHARSET:

	    ascii     8bcccbcc18b95.b
	    dos       8bcccbcc12bc5b95.b.
	    ebcdic    5bc6bcc7bcc41b.9b7.9b5.b..8b6.10b6.b9.7b
		      9.8b8.17b3.3b9.7b9.8b8.6b10.b.b.b.
	    IBM-1047  4cbcbc3b9cbccbccbb4c6bcc5b3cbbc4bc4bccbc		      191.b
	    iso8859   8bcccbcc18b95.33b.
	    koi8-r    8bcccbcc18b95.b128.
	    latin1    8bcccbcc18b95.33b.
	    next      8bcccbcc18b95.bb125.bb

       If neither LESSCHARSET nor LESSCHARDEF is set, but the string  "UTF-8"  is  found  in  the
       LC_ALL, LC_TYPE or LANG environment variables, then the default character set is utf-8.

       If  that  string is not found, but your system supports the setlocale interface, less will
       use setlocale to determine the character set.  setlocale is controlled by setting the LANG
       or LC_CTYPE environment variables.

       Finally,  if  the  setlocale interface is also not available, the default character set is
       latin1.

       Control and binary characters are displayed in standout (reverse video).  Each such  char-
       acter  is displayed in caret notation if possible (e.g. ^A for control-A).  Caret notation
       is used only if inverting the 0100 bit results in a normal  printable  character.   Other-
       wise,  the  character  is displayed as a hex number in angle brackets.  This format can be
       changed by setting the LESSBINFMT environment variable.	LESSBINFMT may begin with  a  "*"
       and one character to select the display attribute: "*k" is blinking, "*d" is bold, "*u" is
       underlined, "*s" is standout, and "*n" is normal.  If LESSBINFMT does  not  begin  with	a
       "*",  normal  attribute	is  assumed.   The  remainder of LESSBINFMT is a string which may
       include one printf-style escape sequence (a % followed by x, X, o, d, etc.).  For example,
       if  LESSBINFMT is "*u[%x]", binary characters are displayed in underlined hexadecimal sur-
       rounded by brackets.  The default if no LESSBINFMT is specified is "*s<%X>".

PROMPTS
       The -P option allows you to tailor the prompt to your preference.  The string given to the
       -P  option  replaces  the  specified  prompt string.  Certain characters in the string are
       interpreted specially.  The prompt mechanism is rather complicated to provide flexibility,
       but  the ordinary user need not understand the details of constructing personalized prompt
       strings.

       A percent sign followed by a single character is expanded according to what the	following
       character is:

       %bX    Replaced	by  the  byte offset into the current input file.  The b is followed by a
	      single character (shown as X above) which specifies the line whose byte  offset  is
	      to be used.  If the character is a "t", the byte offset of the top line in the dis-
	      play is used, an "m" means use the middle line, a "b" means use the bottom line,	a
	      "B" means use the line just after the bottom line, and a "j" means use the "target"
	      line, as specified by the -j option.

       %B     Replaced by the size of the current input file.

       %c     Replaced by the column number of the text appearing in  the  first  column  of  the
	      screen.

       %dX    Replaced	by  the  page number of a line in the input file.  The line to be used is
	      determined by the X, as with the %b option.

       %D     Replaced by the number of pages in the input file, or equivalently, the page number
	      of the last line in the input file.

       %E     Replaced	by  the  name of the editor (from the VISUAL environment variable, or the
	      EDITOR environment variable if VISUAL is not defined).  See the discussion  of  the
	      LESSEDIT feature below.

       %f     Replaced by the name of the current input file.

       %i     Replaced by the index of the current file in the list of input files.

       %lX    Replaced	by  the  line number of a line in the input file.  The line to be used is
	      determined by the X, as with the %b option.

       %L     Replaced by the line number of the last line in the input file.

       %m     Replaced by the total number of input files.

       %pX    Replaced by the percent into the current input file, based on  byte  offsets.   The
	      line used is determined by the X as with the %b option.

       %PX    Replaced	by  the  percent into the current input file, based on line numbers.  The
	      line used is determined by the X as with the %b option.

       %s     Same as %B.

       %t     Causes any trailing spaces to be removed.  Usually used at the end of  the  string,
	      but may appear anywhere.

       %x     Replaced by the name of the next input file in the list.

       If any item is unknown (for example, the file size if input is a pipe), a question mark is
       printed instead.

       The format of the prompt string can be changed depending on certain conditions.	 A  ques-
       tion  mark  followed  by  a single character acts like an "IF": depending on the following
       character, a condition is evaluated.  If the condition is true, any  characters	following
       the question mark and condition character, up to a period, are included in the prompt.  If
       the condition is false, such characters are not included.  A colon appearing  between  the
       question  mark  and  the period can be used to establish an "ELSE": any characters between
       the colon and the period are included in the string if and only if  the	IF  condition  is
       false.  Condition characters (which follow a question mark) may be:

       ?a     True if any characters have been included in the prompt so far.

       ?bX    True if the byte offset of the specified line is known.

       ?B     True if the size of current input file is known.

       ?c     True if the text is horizontally shifted (%c is not zero).

       ?dX    True if the page number of the specified line is known.

       ?e     True if at end-of-file.

       ?f     True if there is an input filename (that is, if input is not a pipe).

       ?lX    True if the line number of the specified line is known.

       ?L     True if the line number of the last line in the file is known.

       ?m     True if there is more than one input file.

       ?n     True if this is the first prompt in a new input file.

       ?pX    True  if	the  percent  into  the current input file, based on byte offsets, of the
	      specified line is known.

       ?PX    True if the percent into the current input file, based  on  line	numbers,  of  the
	      specified line is known.

       ?s     Same as "?B".

       ?x     True  if	there is a next input file (that is, if the current input file is not the
	      last one).

       Any characters other than the special ones (question mark,  colon,  period,  percent,  and
       backslash)  become  literally  part  of	the prompt.  Any of the special characters may be
       included in the prompt literally by preceding it with a backslash.

       Some examples:

       ?f%f:Standard input.

       This prompt prints the filename, if known; otherwise the string "Standard input".

       ?f%f .?ltLine %lt:?pt%pt\%:?btByte %bt:-...

       This prompt would print the filename, if known.	The filename is followed by the line num-
       ber, if known, otherwise the percent if known, otherwise the byte offset if known.  Other-
       wise, a dash is printed.  Notice how each question mark has a matching period, and how the
       % after the %pt is included literally by escaping it with a backslash.

       ?n?f%f .?m(file %i of %m) ..?e(END) ?x- Next\: %x..%t

       This prints the filename if this is the first prompt in a file, followed by the "file N of
       N" message if there is more than one input file.  Then, if  we  are  at	end-of-file,  the
       string  "(END)"	is  printed  followed  by  the	name  of  the next file, if there is one.
       Finally, any trailing spaces are truncated.  This is the default prompt.   For  reference,
       here  are the defaults for the other two prompts (-m and -M respectively).  Each is broken
       into two lines here for readability only.

       ?n?f%f .?m(file %i of %m) ..?e(END) ?x- Next\: %x.:
	    ?pB%pB\%:byte %bB?s/%s...%t

       ?f%f .?n?m(file %i of %m) ..?ltlines %lt-%lb?L/%L. :
	    byte %bB?s/%s. .?e(END) ?x- Next\: %x.:?pB%pB\%..%t

       And here is the default message produced by the = command:

       ?f%f .?m(file %i of %m) .?ltlines %lt-%lb?L/%L. .
	    byte %bB?s/%s. ?e(END) :?pB%pB\%..%t

       The prompt expansion features are also used for another purpose: if an  environment  vari-
       able  LESSEDIT  is defined, it is used as the command to be executed when the v command is
       invoked.  The LESSEDIT string is expanded in the same way  as  the  prompt  strings.   The
       default value for LESSEDIT is:

	    %E ?lm+%lm. %f

       Note  that  this expands to the editor name, followed by a + and the line number, followed
       by the file name.  If your editor does not accept the "+linenumber" syntax, or  has  other
       differences  in	invocation  syntax,  the  LESSEDIT variable can be changed to modify this
       default.

SECURITY
       When the environment variable LESSSECURE is set to 1, less runs in a "secure" mode.   This
       means these features are disabled:

	      !      the shell command

	      |      the pipe command

	      :e     the examine command.

	      v      the editing command

	      s  -o  log files

	      -k     use of lesskey files

	      -t     use of tags files

		     metacharacters in filenames, such as *

		     filename completion (TAB, ^L)

       Less can also be compiled to be permanently in "secure" mode.

ENVIRONMENT VARIABLES
       Environment  variables may be specified either in the system environment as usual, or in a
       lesskey (1) file.  If environment variables are defined in more than one place,	variables
       defined in a local lesskey file take precedence over variables defined in the system envi-
       ronment, which take precedence over variables defined in the system-wide lesskey file.

       COLUMNS
	      Sets the number of columns on the screen.  Takes precedence over the number of col-
	      umns  specified  by  the	TERM variable.	(But if you have a windowing system which
	      supports TIOCGWINSZ or WIOCGETD, the window system's idea of the screen size  takes
	      precedence over the LINES and COLUMNS environment variables.)

       EDITOR The name of the editor (used for the v command).

       HOME   Name  of	the  user's  home directory (used to find a lesskey file on Unix and OS/2
	      systems).

       HOMEDRIVE, HOMEPATH
	      Concatenation of the HOMEDRIVE and HOMEPATH environment variables is  the  name  of
	      the user's home directory if the HOME variable is not set (only in the Windows ver-
	      sion).

       INIT   Name of the user's init directory (used to find a lesskey file on OS/2 systems).

       LANG   Language for determining the character set.

       LC_CTYPE
	      Language for determining the character set.

       LESS   Options which are passed to less automatically.

       LESSANSIENDCHARS
	      Characters which are assumed to end an ANSI color escape sequence (default "m").

       LESSBINFMT
	      Format for displaying non-printable, non-control characters.

       LESSCHARDEF
	      Defines a character set.

       LESSCHARSET
	      Selects a predefined character set.

       LESSCLOSE
	      Command line to invoke the (optional) input-postprocessor.

       LESSECHO
	      Name of the lessecho program (default "lessecho").  The lessecho program is  needed
	      to expand metacharacters, such as * and ?, in filenames on Unix systems.

       LESSEDIT
	      Editor prototype string (used for the v command).  See discussion under PROMPTS.

       LESSGLOBALTAGS
	      Name  of the command used by the -t option to find global tags.  Normally should be
	      set to "global" if your system has the global (1) command.  If not set, global tags
	      are not used.

       LESSKEY
	      Name of the default lesskey(1) file.

       LESSKEY_SYSTEM
	      Name of the default system-wide lesskey(1) file.

       LESSMETACHARS
	      List of characters which are considered "metacharacters" by the shell.

       LESSMETAESCAPE
	      Prefix  which  less  will  add  before  each metacharacter in a command sent to the
	      shell.  If LESSMETAESCAPE is an empty string,  commands  containing  metacharacters
	      will not be passed to the shell.

       LESSOPEN
	      Command line to invoke the (optional) input-preprocessor.

       LESSSECURE
	      Runs less in "secure" mode.  See discussion under SECURITY.

       LESSSEPARATOR
	      String to be appended to a directory name in filename completion.

       LINES  Sets  the number of lines on the screen.	Takes precedence over the number of lines
	      specified by the TERM variable.  (But if you have a windowing system which supports
	      TIOCGWINSZ  or  WIOCGETD,  the window system's idea of the screen size takes prece-
	      dence over the LINES and COLUMNS environment variables.)

       PATH   User's search path (used to find a lesskey file on MS-DOS and OS/2 systems).

       SHELL  The shell used to execute the ! command, as well as to expand filenames.

       TERM   The type of terminal on which less is being run.

       VISUAL The name of the editor (used for the v command).

SEE ALSO
       lesskey(1)

WARNINGS
       The = command and prompts (unless changed by -P) report the line numbers of the	lines  at
       the  top  and  bottom of the screen, but the byte and percent of the line after the one at
       the bottom of the screen.

       If the :e command is used to name more than one file, and one of the named files has  been
       viewed previously, the new files may be entered into the list in an unexpected order.

       On  certain  older terminals (the so-called "magic cookie" terminals), search highlighting
       will cause an erroneous display.  On such terminals, search highlighting  is  disabled  by
       default to avoid possible problems.

       In  certain  cases, when search highlighting is enabled and a search pattern begins with a
       ^, more text than the matching string may be highlighted.  (This problem  does  not  occur
       when less is compiled to use the POSIX regular expression package.)

       When  viewing  text  containing ANSI color escape sequences using the -R option, searching
       will not find text containing an embedded escape sequence.  Also, search highlighting  may
       change the color of some of the text which follows the highlighted text.

       On  some  systems, setlocale claims that ASCII characters 0 thru 31 are control characters
       rather than binary characters.  This causes less to treat some binary files  as	ordinary,
       non-binary files.  To workaround this problem, set the environment variable LESSCHARSET to
       "ascii" (or whatever character set is appropriate).

       See http://www.greenwoodsoftware.com/less for the latest list of known bugs in  this  ver-
       sion of less.

COPYRIGHT
       Copyright (C) 2002  Mark Nudelman

       less is part of the GNU project and is free software.  You can redistribute it and/or mod-
       ify it under the terms of either (1) the GNU General Public License as  published  by  the
       Free  Software  Foundation; or (2) the Less License.  See the file README in the less dis-
       tribution for more details regarding redistribution.  You should have received a  copy  of
       the  GNU  General Public License along with the source for less; see the file COPYING.  If
       not, write to the Free Software	Foundation,  59  Temple  Place,  Suite	330,  Boston,  MA
       02111-1307,  USA.   You should also have received a copy of the Less License; see the file
       LICENSE.

       less is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;  without
       even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
       GNU General Public License for more details.

AUTHOR
       Mark Nudelman <markn@greenwoodsoftware.com>
       Send bug reports or comments to the above address or to bug-less@gnu.org.
       For more information, see the less homepage at http://www.greenwoodsoftware.com/less.

				     Version 378: 30 Sep 2002				  LESS(1)


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