Import the [now] dual licensed version 3.5.4 of less. It is

distributed under your choice of the GPL or a BSD style license.

Reviewed by:	peter
Obtained from:	http://home.flash.net/~marknu/less/

1 files changed, 485 insertions, 0 deletions

diff --git a/contrib/less/NEWS b/contrib/less/NEWS
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+
+                     NEWS about less
+
+======================================================================
+
+  For the latest news about less, see the "less" Web page:
+      http://www.flash.net/~marknu/less
+  You can also download the latest version of less from there.
+
+  To report bugs, suggestions or comments, send email to 
+  bug-less@gnu.org or marknu@flash.net.
+
+======================================================================
+
+
+	Major changes between "less" versions 352 and 354
+
+* Allow space after numeric-valued command line options.
+
+* Fix problem with configuring terminal libraries on some systems.
+
+* Add support for PCRE regular expression library.
+
+* Add --with-regex option to configure to allow manually selecting
+  a regular expression library.
+
+* Fix bug compiling with SECURE = 1.
+
+======================================================================
+
+
+	Major changes between "less" versions 346 and 352
+
+* Enable UTF-8 if "UTF-8" appears in locale-related environment variables.
+
+* Add --with-editor option to configure script.
+
+* The -M prompt and = message now show the top and bottom line number.
+
+* Fix bug in running the editor on a file whose name contains quotes, etc.
+
+* Fix bug in horizontal scrolling of long lines.
+
+* Fix bug in doing :d on a file which contains marks.
+
+* Fix bug causing cleared lines to sometimes be filled with standout, 
+  bold, underline, etc. on certain terminals.
+
+* Fixes for MS-DOS (DJGPP) version.
+
+======================================================================
+
+
+	Major changes between "less" versions 340 and 346
+
+* The UTF-8 character set is now supported.
+
+* The default character set is now latin1 rather than ascii.
+
+* New option -R (--RAW-CONTROL-CHARS) is like -r but handles 
+  long (wrapped) lines correctly, as long as the input contains only 
+  normal text and ANSI color escape sequences.
+
+* New option -F (--quit-if-one-screen) quits if the text fits on
+  the first screen.
+
+* The -w option now highlights the target line of a g or p command.
+
+* A system-wide lesskey file is supported (LESSKEY_SYSTEM).
+
+* New escape for prompt strings: %c is replaced by column number.
+
+* New escape for prompt strings: %P is replaced by percentage into
+  file, based on line number rather than byte offset.
+
+* HOME and END keys now jump to beginning of file or end of file.
+
+======================================================================
+
+
+	Major changes between "less" versions 337 and 340
+
+* Command line options for less may now be given in either the old 
+  single-letter form, or a new long name form (--option-name).
+  See the less man page or "less --help" for the list of long option names.
+
+* Command line options for lesskey may now be given in a new long name
+  form.  See the lesskey man page for the list of long option names.
+
+* New command -- toggles an option using the long option name.
+
+* New command __ queries an option using the long option name.
+
+* The old -- command is renamed as -!.
+
+* If a ^P is entered between the dash and the option letter of the -
+  command, the message describing the new setting is suppressed.
+
+* Lesskey files may now contain \k escape sequences to represent the
+  "special" keys (arrows, PAGE-UP/PAGE-DOWN, HOME, END, INSERT, DELETE).
+
+* New command :d removes the current file from the list of files.
+
+* New option -~ (like -w before version 335)
+  suppresses tildes after end-of-file.
+
+* Less is now released under the GNU General Public License.
+
+======================================================================
+
+
+	Major changes between "less" versions 335 and 337
+
+* Fixed bugs in "make install".
+
+======================================================================
+
+
+	Major changes between "less" versions 332 and 335
+
+* The old -w flag (suppress tildes after end-of-file) has been removed.
+
+* New -w flag highlights the first new line after a forward-screen.
+
+* New -W flag highlights the first new line after any forward movement.
+
+* Window resize works even if LINES and/or COLUMNS environment 
+  variables are incorrect.
+
+* New percent escapes for prompt strings:
+  %d is replaced by the page number, and
+  %D is replaced by the number of pages in the file.
+
+* Added charsets "iso8859" and "ebcdic".
+
+* In Windows version, uses HOMEDRIVE and HOMEPATH if HOME is not defined.
+
+* Fixed some bugs causing incorrect display on DOS/Windows.
+
+======================================================================
+
+
+	Major changes between "less" versions 330 and 332
+
+* Filenames from the command line are entered into the command history,
+  so UPARROW/DOWNARROW can be used to retrieve them from the :e command.
+
+* Now works correctly on Windows when using a scrolling terminal
+  window (buffer larger than display window).
+
+* On Windows, now restores the console screen on exit.  
+  Use -X to get the old behavior.
+
+* Fixed bug on Windows when CAPS-LOCK or NUM-LOCK is pressed.
+
+* Fixed bug on Windows when piping output of an interactive program.
+
+* Fixed bug in tags file processing when tags file has DOS-style
+  line terminators (CR/LF).
+
+* Fixed compilation problem on OS/2.
+
+======================================================================
+
+
+	Major changes between "less" versions 321 and 330
+
+* Now supports filenames containing spaces (in double quotes).
+  New option -" can be used to change the quoting characters.
+
+* In filename completion, a slash is appended to a directory name.
+  If the environment variable LESSSEPARATOR is set, the value of
+  that variable, rather than a slash, is appended.
+
+* LeftArrow and RightArrow are same as ESC-[ and ESC-].
+
+* Added commands ESC-( and ESC-), same as ESC-[ and ESC-].
+
+* A "quit" command defined in a lesskey file may now have an "extra" 
+  string, which is used to return an exit code from less when it quits.
+
+* New environment variables LESSMETACHARS and LESSMETAESCAPE provide
+  more control over how less interfaces to the shell.
+
+* Ported to Microsoft Visual C compiler for Windows.
+
+* Ported to DJGPP compiler for MS-DOS.
+
+* Bug fixes.
+
+======================================================================
+
+
+	Major changes between "less" versions 291 and 321
+
+* Command line at bottom of screen now scrolls, so it can be longer 
+  than the screen width.
+
+* New commands ESC-] and ESC-[ scroll the display horizontally.
+
+* New command ESC-SPACE scrolls forward a full screen, even if it
+  hits end-of-file.
+
+* Alternate modifiers for search commands: ^N is same as !,
+  ^F is same as @, and ^E is same as *.
+
+* New modifier for search commands: ^K means highlight the matches
+  currently on-screen, but don't move to the first match.
+
+* New modifier for search commands: ^R means don't use regular
+  expressions in the search.
+
+* Environment variable LESSKEY gives name of default lesskey file.
+
+* Environment variable LESSSECURE will force less to run in
+  "secure" mode.
+
+* Command line argument "--" signals that the rest of the arguments
+  are files (not option flags).
+
+* Help file (less.hlp) is no longer installed.  Help text is now 
+  embedded in the less executable itself.
+
+* Added -Ph to change the prompt for the help text.
+  Added -Ps to change the default short prompt (same as plain -P).
+
+* Ported to the Borland C compiler for MS-DOS.
+
+* Ported to Windows 95 & Windows NT.
+
+* Ported to OS-9.
+
+* Ported to GNU Hurd.
+
+======================================================================
+
+
+	Major changes between "less" versions 290 and 291
+
+* Less environment variables can be specified in lesskey files.
+
+* Fixed MS-DOS build.
+
+======================================================================
+
+
+	Major changes between "less" versions 278 and 290
+
+* Accepts GNU-style options "--help" and "--version".
+
+* OS/2 version looks for less.ini in $HOME before $INIT and $PATH.
+
+* Bug fixes
+
+======================================================================
+
+
+	Major changes between "less" versions 252 and 278
+
+* A LESSOPEN preprocessor may now pipe the converted file data to less,
+  rather than writing it to a temporary file.
+
+* Search pattern highlighting has been fixed.  It now highlights 
+  reliably, even if a string is split across two screen lines,
+  contains TABs, etc.
+
+* The -F flag (which suppress search highlighting) has been changed 
+  to -G.  A new flag, -g, changes search highlighting to highlight 
+  only the string found by the last search command, instead of all 
+  strings which match the last search command.
+
+* New flag -I acts like -i, but ignores case even if the search 
+  pattern contains uppercase letters.
+
+* Less now checks for the environment variable VISUAL before EDITOR.
+
+* Ported to OS/2.
+
+======================================================================
+
+
+	Major changes between "less" versions 237 and 252
+
+* Changes in line-editing keys:
+  The literal key is now ^V or ^A rather than \ (backslash).
+  Filename completion commands (TAB and ^L) are disabled 
+  when typing a search pattern.
+
+* Line-editing command keys can be redefined using lesskey.
+
+* Lesskey with no input file defaults to $HOME/.lesskey
+  rather than standard input.
+
+* New option -V displays version number of less.
+
+* New option -V displays version number of lesskey.
+
+* Help file less.hlp is now installed by default in /usr/local/share 
+  rather than /usr/local/lib.
+
+
+======================================================================
+
+
+	Major changes between "less" versions 170 and 237
+
+* By popular demand, text which matches the current search pattern
+  is highlighted.  New -F flag disables this feature.
+
+* Henry Spencer's regexp.c is now included, for systems which do not
+  have a regular expression library.
+  regexp.c is Copyright (c) 1986 by University of Toronto.
+
+* New line-editing keys, including command history (arrow keys) and 
+  filename completion (TAB).
+
+* Input preprocessor allows modification of input files (e.g. uncompress)
+  via LESSOPEN/LESSCLOSE environment variables.
+
+* New -X flag disables sending termcap "ti" and "te" (initialize and
+  deinitialize) strings to the terminal. 
+
+* Changing -i from within less now correctly affects a subsequent
+  repeated search.  
+
+* Searching for underlined or overstruck text now works when the -u
+  flag is in effect, rather than the -i flag.
+
+* Use setlocale (LANG and LC_CTYPE environment variables) to determine
+  the character set if LESSCHARSET/LESSCHARDEF are not set.
+
+* The default format for displaying binary characters is now standout
+  (reverse video) rather than blinking.  This can still be changed by
+  setting the LESSBINFMT environment variable.
+
+* Use autoconf installation technology.
+
+* Ported to MS-DOS.
+
+        ********************************
+          Things that may surprise you
+        ********************************
+
+* When you enter text at the bottom of the screen (search string, 
+  filename, etc.), some keys act different than previously.  
+  Specifically, \ (backslash), ESC, TAB, BACKTAB, and control-L 
+  now have line editing functions.
+
+* Some previous unofficial versions of less were able to display
+  compressed files.  The new LESSOPEN/LESSCLOSE feature now provides
+  this functionality in a different way.
+
+* Some previous unofficial versions of less provided a -Z flag to 
+  set the number of lines of text to retain between full screen scrolls.
+  The -z-n flag (that is, -z with a negative number) provides this 
+  functionality.
+
+
+======================================================================
+
+
+	Major changes between "less" versions 123 and 170
+
+* New option -j allows target lines to be positioned anywhere on screen.
+
+* New option -S truncates displayed line at the screen width,
+  rather than wrapping onto the next line.
+
+* New option -y limits amount of forward scroll.
+
+* New option -T specifies a "tags" file.
+
+* Non-printable, non-control characters are displayed in octal.
+  Such characters, as well as control characters, are displayed 
+  in blinking mode.
+
+* New command -+ sets an option to its default.
+* New command -- sets an option to the opposite of its default.
+
+* Lesskey file may have a string appended to a key's action,
+  which acts as though typed in after the command.
+
+* New commands ESC-^F and ESC-^B match arbitrary types of brackets.
+
+* New command F monitors a growing file (like "tail -f").
+
+* New command | pipes a section of the input file into a shell command.
+
+* New command :x directly jumps to a file in the command line list.
+
+* Search commands have been enhanced and reorganized:
+	n	Repeat search, same direction.
+	N	Repeat search, opposite direction.
+	ESC-/	Search forward thru file boundaries
+	ESC-?	Search backward thru file boundaries
+	ESC-n	Repeat search thru file boundaries, same direction.
+	ESC-N	Repeat search thru file boundaries, opposite direction.
+  Special character * causes search to search thru file boundaries.
+  Special character @ causes search to begin at start/end of file list.
+
+* Examining a new file adds it to the command line list.
+  A list of files, or an expression which matches more than one file,
+  may be examined; all of them are added to the command line list.
+
+* Environment variables LESSCHARSET and LESSCHARDEF can define
+  a non-ASCII character set.
+
+* Partial support for MSDOS, including options -R for repainting screen
+  on quit, -v/-V to select video mode, and -W to change window size.
+
+
+======================================================================
+
+
+	Major changes between "less" versions 97 and 123
+
+* New option (-N) causes line numbers to be displayed in the
+  text of the file (like vi "set nu").
+
+* New option (-?) prints help message immediately.
+
+* New option (-r) displays "raw" control characters, without
+  mapping them to ^X notation.
+
+* New option (-f) forces less to open non-regular files
+  (directories, etc).
+
+* New option (-k) can be used to specify lesskey files by name.
+
+* New option (-y) can be used to set a forward scroll limit
+  (like -h sets a backward scroll limit).
+
+* File marks (set by the m command) are now preserved when a new
+  file is edited.  The ' command can thus be used to switch files.
+
+* New command ESC-/ searches all files (on the command line) 
+  for a pattern.
+
+* New command ESC-n repeats previous search, spanning files.
+
+* The N command has been changed to repeat the previous search
+  in the reverse direction.  The old N command is still available 
+  via :n.
+
+* New command ESC-N repeats previous search in the reverse
+  direction and spanning files.
+
+* 8 bit characters are now supported.  A new option (-g) can be 
+  used to strip off the eighth bit (the previous behavior).
+
+* Options which take a following string (like -t) may now
+  optionally have a space between the option letter and the string.
+
+* Six new commands { } ( ) [ and ] can be used to match
+  brackets of specific types, similar to vi % command.
+
+* New commands z and w move forward/backward one window and
+  simultaneously set the window size.
+
+* Prompt string expansion now has %L for line number of the last
+  line in the file, and %E for the name of the editor.
+  Also, % escapes which refer to a line (b=bottom, t=top, etc.)
+  can use j for the jump target line.
+
+* New environment variable LESSEDIT can be used to tailor the
+  command string passed to the editor by the v command.
+
+* Examining a file which was previously examined will return
+  to the same position in the file.
+
+* A "%" is expanded to the current filename and a "#" to the 
+  previous filename, in both shell commands and the E command.
+  (Previously % worked only in shell commands and # worked 
+  only in the E command.)
+
+* New command ":ta" is equivalent to "-t".
+
+* New command "s" is equivalent to "-l".
+
+* The - command may be followed by "+X" to revert to the default
+  for option X, or "-X" to get the opposite of the default.
+
+* Lesskey files may now include characters after the action as
+  extra input to be parsed after the action; for example:
+  "toggle-option X" to toggle a specific option X.