Annotation of src/usr.bin/less/version.c, Revision 1.2
1.2 ! niklas 1: /* $OpenBSD$ */
! 2:
1.1 etheisen 3: /*
4: * Copyright (c) 1984,1985,1989,1994,1995 Mark Nudelman
5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice in the documentation and/or other materials provided with
14: * the distribution.
15: *
16: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
17: * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
20: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
22: * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
23: * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
25: * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
26: * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27: */
28:
29:
30: /*
31: ----------------------- CHANGE HISTORY --------------------------
32:
33: 1/29/84 Allowed use on standard input
34: 2/1/84 Added E, N, P commands
35: 4/17/84 Added '=' command, 'stop' signal handling
36: 4/20/84 Added line folding
37: v2 4/27/84 Fixed '=' command to use BOTTOM_PLUS_ONE,
38: instead of TOP, added 'p' & 'v' commands
39: v3 5/3/84 Added -m and -t options, '-' command
40: v4 5/3/84 Added LESS environment variable
41: v5 5/3/84 New comments, fixed '-' command slightly
42: v6 5/15/84 Added -Q, visual bell
43: v7 5/24/84 Fixed jump_back(n) bug: n should count real
44: lines, not folded lines. Also allow number on G command.
45: v8 5/30/84 Re-do -q and -Q commands
46: v9 9/25/84 Added "+<cmd>" argument
47: v10 10/10/84 Fixed bug in -b<n> argument processing
48: v11 10/18/84 Made error() ring bell if \n not entered.
49: -----------------------------------------------------------------
50: v12 2/13/85 Reorganized signal handling and made portable to 4.2bsd.
51: v13 2/16/85 Reword error message for '-' command.
52: v14 2/22/85 Added -bf and -bp variants of -b.
53: v15 2/25/85 Miscellaneous changes.
54: v16 3/13/85 Added -u flag for backspace processing.
55: v17 4/13/85 Added j and k commands, changed -t default.
56: v18 4/20/85 Rewrote signal handling code.
57: v19 5/2/85 Got rid of "verbose" eq_message().
58: Made search() scroll in some cases.
59: v20 5/21/85 Fixed screen.c ioctls for System V.
60: v21 5/23/85 Fixed some first_cmd bugs.
61: v22 5/24/85 Added support for no RECOMP nor REGCMP.
62: v23 5/25/85 Miscellanous changes and prettying up.
63: Posted to USENET.
64: -----------------------------------------------------------------
65: v24 6/3/85 Added ti,te terminal init & de-init.
66: (Thanks to Mike Kersenbrock)
67: v25 6/8/85 Added -U flag, standout mode underlining.
68: v26 6/9/85 Added -M flag.
69: Use underline termcap (us) if it exists.
70: v27 6/15/85 Renamed some variables to make unique in
71: 6 chars. Minor fix to -m.
72: v28 6/28/85 Fixed right margin bug.
73: v29 6/28/85 Incorporated M.Rose's changes to signal.c
74: v30 6/29/85 Fixed stupid bug in argument processing.
75: v31 7/15/85 Added -p flag, changed repaint algorithm.
76: Added kludge for magic cookie terminals.
77: v32 7/16/85 Added cat_file if output not a tty.
78: v33 7/23/85 Added -e flag and EDITOR.
79: v34 7/26/85 Added -s flag.
80: v35 7/27/85 Rewrote option handling; added option.c.
81: v36 7/29/85 Fixed -e flag to work if not last file.
82: v37 8/10/85 Added -x flag.
83: v38 8/19/85 Changed prompting; created prompt.c.
84: v39 8/24/85 (Not -p) does not initially clear screen.
85: v40 8/26/85 Added "skipping" indicator in forw().
86: Posted to USENET.
87: -----------------------------------------------------------------
88: v41 9/17/85 ONLY_RETURN, control char commands,
89: faster search, other minor fixes.
90: v42 9/25/85 Added ++ command line syntax;
91: ch_fsize for pipes.
92: v43 10/15/85 Added -h flag, changed prim.c algorithms.
93: v44 10/16/85 Made END print in all cases of eof;
94: ignore SIGTTOU after receiv ing SIGTSTP.
95: v45 10/16/85 Never print backspaces unless -u.
96: v46 10/24/85 Backwards scroll in jump_loc.
97: v47 10/30/85 Fixed bug in edit(): *first_cmd==0
98: v48 11/16/85 Use TIOCSETN instead of TIOCSETP.
99: Added marks (m and ' commands).
100: Posted to USENET.
101: -----------------------------------------------------------------
102: v49 1/9/86 Fixed bug: signal didn't clear mcc.
103: v50 1/15/86 Added ' (quote) to gomark.
104: v51 1/16/86 Added + cmd, fixed problem if first_cmd
105: fails, made g cmd sort of "work" on pipes
106: ev en if bof is no longer buffered.
107: v52 1/17/86 Made short files work better.
108: v53 1/20/86 Added -P option.
109: v54 1/20/86 Changed help to use HELPFILE.
110: v55 1/23/86 Messages work better if not tty output.
111: v56 1/24/86 Added -l option.
112: v57 1/31/86 Fixed -l to get confirmation before
113: ov erwriting an existing file.
114: v58 8/28/86 Added filename globbing.
115: v59 9/15/86 Fixed some bugs with very long filenames.
116: v60 9/26/86 Incorporated changes from Leith (Casey)
117: Leedom for boldface and -z option.
118: v61 9/26/86 Got rid of annoying repaints after ! cmd.
119: Posted to USENET.
120: -----------------------------------------------------------------
121: v62 12/23/86 Added is_directory(); change -z default to
122: -1 instead of 24; cat-and-exit if -e and
123: file is less than a screenful.
124: v63 1/8/87 Fixed bug in cat-and-exit if > 1 file.
125: v64 1/12/87 Changed puts/putstr, putc/putchr,
126: getc/getchr to av oid name conflict with
127: stdio functions.
128: v65 1/26/87 Allowed '-' command to change NUMBER
129: v alued options (thanks to Gary Puckering)
130: v66 2/13/87 Fixed bug: prepaint should use force=1.
131: v67 2/24/87 Added !! and % expansion to ! command.
132: v68 2/25/87 Added SIGWINCH and TIOCGWINSZ support;
133: changed is_directory to bad_file.
134: (thanks to J. Robert Ward)
135: v69 2/25/87 Added SIGWIND and WIOCGETD (for Unix PC).
136: v70 3/13/87 Changed help cmd from 'h' to 'H'; better
137: error msgs in bad_file, errno_message.
138: v71 5/11/87 Changed -p to -c, made triple -c/-C
139: for clear-eol like more's -c.
140: v72 6/26/87 Added -E, -L, use $SHELL in lsystem().
141: (thanks to Stev e Spearman)
142: v73 6/26/87 Allow Examine "#" for previous file.
143: Posted to USENET 8/25/87.
144: -----------------------------------------------------------------
145: v74 9/18/87 Fix conflict in EOF symbol with stdio.h,
146: Make os.c more portable to BSD.
147: v75 9/23/87 Fix problems in get_term (thanks to
148: Paul Eggert); new backwards scrolling in
149: jump_loc (thanks to Marion Hakanson).
150: v76 9/23/87 Added -i flag; allow single "!" to
151: inv oke a shell (thanks to Franco Barber).
152: v77 9/24/87 Added -n flag and line number support.
153: v78 9/25/87 Fixed problem with prompts longer than
154: the screen width.
155: v79 9/29/87 Added the _ command.
156: v80 10/6/87 Allow signal to break out of linenum scan.
157: v81 10/6/87 Allow -b to be changed from within less.
158: v82 10/7/87 Add cmd_decode to use a table for key
159: binding (thanks to Dav id Nason).
160: v83 10/9/87 Allow .less file for user-defined keys.
161: v84 10/11/87 Fix -e/-E problems (thanks to Felix Lee).
162: v85 10/15/87 Search now keeps track of line numbers.
163: v86 10/20/87 Added -B option and autobuf; fixed
164: "pipe error" bug.
165: v87 3/1/88 Fix bug re BSD signals while reading file.
166: v88 3/12/88 Use new format for -P option (thanks to
167: der Mouse), allow "+-c" without message,
168: fix bug re BSD hangup.
169: v89 3/18/88 Turn off line numbers if linenum scan
170: is interrupted.
171: v90 3/30/88 Allow -P from within less.
172: v91 3/30/88 Added tags file support (new -t option)
173: (thanks to Brian Campbell).
174: v92 4/4/88 Added -+option syntax.
175: v93 4/11/88 Add support for slow input (thanks to
176: Joe Orost & apologies for taking almost
177: 3 years to get this in!)
178: v94 4/11/88 Redo reading/signal stuff.
179: v95 4/20/88 Repaint screen better after signal.
180: v96 4/21/88 Add /! and ?! commands.
181: v97 5/17/88 Allow -l/-L from within less.
182: Eliminate some static arrays (use calloc).
183: Posted to USENET.
184: -----------------------------------------------------------------
185: v98 10/14/88 Fix incorrect calloc call; uninitialized
186: var in exec_mca; core dump on unknown TERM.
187: Make v cmd work if past last line of file.
188: Fix some signal bugs.
189: v99 10/29/88 Allow space between -X and string,
190: when X is a string-valued option.
191: v100 1/5/89 Fix globbing bug when $SHELL not set;
192: allow spaces after -t command.
193: v101 1/6/89 Fix problem with long (truncated) lines
194: in tags file (thanks to Neil Dixon).
195: v102 1/6/89 Fix bug with E# when no prev file;
196: allow spaces after -l command.
197: v103 3/14/89 Add -N, -f and -? options. Add z and w
198: commands. Add %L for prompt strings.
199: v104 3/16/89 Added EDITPROTO.
200: v105 3/20/89 Fix bug in find_linenum which cached
201: incorrectly on long lines.
202: v106 3/31/89 Added -k option and multiple lesskey
203: files.
204: v107 4/27/89 Add 8-bit char support and -g option.
205: Split option code into 3 files.
206: v108 5/5/89 Allocate position table dynamically
207: (thanks to Paul Eggert); change % command
208: from "percent" to vi-style brace finder.
209: v109 5/10/89 Added ESC-% command, split prim.c.
210: v110 5/24/89 Fixed bug in + option; fixed repaint bug
211: under Sun windows (thanks to Paul Eggert).
212: v111 5/25/89 Generalized # and % expansion; use
213: calloc for some error messages.
214: v112 5/30/89 Get rid of ESC-%, add {}()[] commands.
215: v113 5/31/89 Optimize lseeks (thanks to Paul Eggert).
216: v114 7/25/89 Added ESC-/ and ESC-/! commands.
217: v115 7/26/89 Added ESC-n command.
218: v116 7/31/89 Added find_pos to optimize g command.
219: v117 8/1/89 Change -f option to -r.
220: v118 8/2/89 Save positions for all previous files,
221: not just the immediately previous one.
222: v119 8/7/89 Save marks across file boundaries.
223: Add file handle stuff.
224: v120 8/11/89 Add :ta command.
225: v121 8/16/89 Add -f option.
226: v122 8/30/89 Fix performance with many buffers.
227: v123 8/31/89 Verbose prompts for string options.
228: Posted beta to USENET.
229: -----------------------------------------------------------------
230: v124 9/18/89 Reorganize search commands,
231: N = rev, ESC-n = span, add ESC-N.
232: v125 9/18/89 Fix tab bug (thanks to Alex Liu).
233: Fix EOF bug when both -w and -c.
234: v126 10/25/89 Add -j option.
235: v127 10/27/89 Fix problems with blank lines before BOF.
236: v128 10/27/89 Add %bj, etc. to prompt strings.
237: v129 11/3/89 Add -+,-- commands; add set-option and
238: unset-option to lesskey.
239: v130 11/6/89 Generalize A_EXTRA to string, remove
240: set-option, unset-option from lesskey.
241: v131 11/7/89 Changed name of EDITPROTO to LESSEDIT.
242: v132 11/8/89 Allow editing of command prefix.
243: v133 11/16/89 Add -y option (thanks to Jeff Sullivan).
244: v134 12/1/89 Glob filenames in the -l command.
245: v135 12/5/89 Combined {}()[] commands into one, and
246: added ESC-^F and ESC-^B commands.
247: v136 1/20/90 Added -S, -R flags. Added | command.
248: Added warning for binary files. (thanks
249: to Richard Brittain and J. Sullivan).
250: v137 1/21/90 Rewrote horrible pappend code.
251: Added * notation for hi-bit chars.
252: v138 1/24/90 Fix magic cookie terminal handling.
253: Get rid of "cleanup" loop in ch_get.
254: v139 1/27/90 Added MSDOS support. (many thanks
255: to Richard Brittain).
256: v140 2/7/90 Editing a new file adds it to the
257: command line list.
258: v141 2/8/90 Add edit_list for editing >1 file.
259: v142 2/10/90 Add :x command.
260: v143 2/11/90 Add * and @ modifies to search cmds.
261: Change ESC-/ cmd from /@* to / *.
262: v144 3/1/90 Messed around with ch_zero;
263: no real change.
264: v145 3/2/90 Added -R and -v/-V for MSDOS;
265: renamed FILENAME to avoid conflict.
266: v146 3/5/90 Pull cmdbuf functions out of command.c
267: v147 3/7/90 Implement ?@; fix multi-file edit bugs.
268: v148 3/29/90 Fixed bug in :e<file> then :e#.
269: v149 4/3/90 Change error,ierror,query to use PARG.
270: v150 4/6/90 Add LESS_CHARSET, LESS_CHARDEF.
271: v151 4/13/90 Remove -g option; clean up ispipe.
272: v152 4/14/90 lsystem() closes input file, for
273: editors which require exclusive open.
274: v153 4/18/90 Fix bug if SHELL unset;
275: fix bug in overstrike control char.
276: v154 4/25/90 Output to fd 2 via buffer.
277: v155 4/30/90 Ignore -i if uppercase in pattern
278: (thanks to Michael Rendell.)
279: v156 5/3/90 Remove scroll limits in forw() & back();
280: causes problems with -c.
281: v157 5/4/90 Forward search starts at next real line
282: (not screen line) after jump target.
283: v158 6/14/90 Added F command.
284: v159 7/29/90 Fix bug in exiting: output not flushed.
285: v160 7/29/90 Clear screen before initial output w/ -c.
286: v161 7/29/90 Add -T flag.
287: v162 8/14/90 Fix bug with +F on command line.
288: v163 8/21/90 Added LESSBINFMT variable.
289: v164 9/5/90 Added -p, LINES, COLUMNS and
290: unset mark ' == BOF, for 1003.2 D5.
291: v165 9/6/90 At EOF with -c set, don't display empty
292: screen when try to page forward.
293: v166 9/6/90 Fix G when final line in file wraps.
294: v167 9/11/90 Translate CR/LF -> LF for 1003.2.
295: v168 9/13/90 Return to curr file if "tag not found".
296: v169 12/12/90 G goes to EOF even if file has grown.
297: v170 1/17/91 Add optimization for BSD _setjmp;
298: fix #include ioctl.h TERMIO problem.
299: (thanks to Paul Eggert)
300: Posted to USENET.
301: -----------------------------------------------------------------
302: v171 3/6/91 Fix -? bug in get_filename.
303: v172 3/15/91 Fix G bug in empty file.
304: Fix bug with ?\n and -i and uppercase
305: pattern at EOF!
306: (thanks to Paul Eggert)
307: v173 3/17/91 Change N cmd to not permanently change
308: direction. (thanks to Brian Matthews)
309: v174 3/18/91 Fix bug with namelogfile not getting
310: cleared when change files.
311: v175 3/18/91 Fix bug with ++cmd on command line.
312: (thanks to Jim Meyering)
313: v176 4/2/91 Change | to not force current screen,
314: include marked line, start/end from
315: top of screen. Improve search speed.
316: (thanks to Don Mears)
317: v177 4/2/91 Add LESSHELP variable.
318: Fix bug with F command with -e.
319: Try /dev/tty for input before using fd 2.
320: Patches posted to USENET 4/2/91.
321: -----------------------------------------------------------------
322: v178 4/8/91 Fixed bug in globbing logfile name.
323: (thanks to Jim Meyering)
324: v179 4/9/91 Allow negative -z for screen-relative.
325: v180 4/9/91 Clear to eos rather than eol if "db";
326: don't use "sr" if "da".
327: (thanks to Tor Lillqvist)
328: v181 4/18/91 Fixed bug with "negative" chars 80 - FF.
329: (thanks to Benny Sander Hofmann)
330: v182 5/16/91 Fixed bug with attribute at EOL.
331: (thanks to Brian Matthews)
332: v183 6/1/91 Rewrite linstall to do smart config.
333: v184 7/11/91 Process \b in searches based on -u
334: rather than -i.
335: v185 7/11/91 -Pxxx sets short prompt; assume SIGWINCH
336: after a SIGSTOP. (thanks to Ken Laprade)
337: -----------------------------------------------------------------
338: v186 4/20/92 Port to MS-DOS (Microsoft C).
339: v187 4/23/92 Added -D option & TAB_COMPLETE_FILENAME.
340: v188 4/28/92 Added command line editing features.
341: v189 12/8/92 Fix mem overrun in anscreen.c:init;
342: fix edit_list to recover from bin file.
343: v190 2/13/93 Make TAB enter one filename at a time;
344: create ^L with old TAB functionality.
345: v191 3/10/93 Defer creating "flash" page for MS-DOS.
346: v192 9/6/93 Add BACK-TAB.
347: v193 9/17/93 Simplify binary_file handling.
348: v194 1/4/94 Add rudiments of alt_filename handling.
349: v195 1/11/94 Port back to Unix; support keypad.
350: -----------------------------------------------------------------
351: v196 6/7/94 Fix bug with bad filename; fix IFILE
352: type problem. (thanks to David MacKenzie)
353: v197 6/7/94 Fix bug with .less tables inserted wrong.
354: v198 6/23/94 Use autoconf installation technology.
355: (thanks to David MacKenzie)
356: v199 6/29/94 Fix MS-DOS build (thanks to Tim Wiegman).
357: v200 7/25/94 Clean up copyright, minor fixes.
358: Posted to prep.ai.mit.edu
359: -----------------------------------------------------------------
360: v201 7/27/94 Check for no memcpy; add casts to calloc;
361: look for regcmp in libgen.a.
362: (thanks to Kaveh Ghazi).
363: v202 7/28/94 Fix bug in edit_next/edit_prev with
364: non-existant files.
365: v203 8/2/94 Fix a variety of configuration bugs on
366: various systems. (thanks to Sakai
367: Kiyotaka, Harald Koenig, Bjorn Brox,
368: Teemu Rantanen, and Thorsten Lockert)
369: v204 8/3/94 Use strerror if available.
370: (thanks to J.T. Conklin)
371: v205 8/5/94 Fix bug in finding "me" termcap entry.
372: (thanks to Andreas Stolcke)
373: 8/10/94 v205+: Change BUFSIZ to LBUFSIZE to avoid name
374: conflict with stdio.h.
375: Posted to prep.ai.mit.edu
376: -----------------------------------------------------------------
377: v206 8/10/94 Use initial_scrpos for -t to avoid
378: displaying first page before init().
379: (thanks to Dominique Petitpierre)
380: v207 8/12/94 Fix bug if stdout is not tty.
381: v208 8/16/94 Fix bug in close_altfile if goto err1
382: in edit_ifile. (Thanks to M.J. Hewitt)
383: v209 8/16/94 Change scroll to wscroll to avoid
384: conflict with library function.
385: v210 8/16/94 Fix bug with bold on 8 bit chars.
386: (thanks to Vitor Duarte)
387: v211 8/16/94 Don't quit on EOI in jump_loc / forw.
388: v212 8/18/94 Use time_t if available.
389: v213 8/20/94 Allow ospeed to be defined in termcap.h.
390: v214 8/20/94 Added HILITE_SEARCH, -F, ESC-u cmd.
391: (thanks to Paul Lew and Bob Byrnes)
392: v215 8/23/94 Fix -i toggle behavior.
393: v216 8/23/94 Process BS in all searches, not only -u.
394: v217 8/24/94 Added -X flag.
395: v218 8/24/94 Reimplement undo_search.
396: v219 8/24/94 Find tags marked with line number
397: instead of pattern.
398: v220 8/24/94 Stay at same position after SIG_WINCH.
399: v221 8/24/94 Fix bug in file percentage in big file.
400: v222 8/25/94 Do better if can't reopen current file.
401: v223 8/27/94 Support setlocale.
402: (thanks to Robert Joop)
403: v224 8/29/94 Revert v216: process BS in search
404: only if -u.
405: v225 9/6/94 Rewrite undo_search again: toggle.
406: v226 9/15/94 Configuration fixes.
407: (thanks to David MacKenzie)
408: v227 9/19/94 Fixed strerror config problem.
409: Posted to prep.ai.mit.edu
410: -----------------------------------------------------------------
411: v228 9/21/94 Fix bug in signals: repeated calls to
412: get_editkeys overflowed st_edittable.
413: v229 9/21/94 Fix "Nothing to search" error if -a
414: and SRCH_PAST_EOF.
415: v230 9/21/94 Don't print extra error msg in search
416: after regerror().
417: v231 9/22/94 Fix hilite bug if search matches 0 chars.
418: (thanks to John Polstra)
419: v232 9/23/94 Deal with weird systems that have
420: termios.h but not tcgetattr().
421: Posted to prep.ai.mit.edu
422: -----------------------------------------------------------------
423: v233 9/26/94 Use get_term() instead of pos_init() in
424: psignals to re-get lower_left termcap.
425: (Thanks to John Malecki)
426: v234 9/26/94 Make MIDDLE closer to middle of screen.
427: v235 9/27/94 Use local strchr if system doesn't have.
428: v236 9/28/94 Don't use libucb; use libterm if
429: libtermcap & libcurses doesn't work.
430: (Fix for Solaris; thanks to Frank Kaefer)
431: v237 9/30/94 Use system isupper() etc if provided.
432: Posted to prep.ai.mit.edu
433: -----------------------------------------------------------------
434: v238 10/6/94 Make binary non-blinking if LESSBINFMT
435: is set to a string without a *.
436: v239 10/7/94 Don't let delimit_word run back past
437: beginning of cmdbuf.
438: v240 10/10/94 Don't write into termcap buffer.
439: (Thanks to Benoit Speckel)
440: v241 10/13/94 New lesskey file format.
441: Don't expand filenames in search command.
442: v242 10/14/94 Allow lesskey specification of "literal".
443: v243 10/14/94 Add #stop command to lesskey.
444: v244 10/16/94 Add -f flag to lesskey.
445: v245 10/25/94 Allow TAB_COMPLETE_FILENAME to be undefd.
446: v246 10/27/94 Move help file to /usr/local/share.
447: v247 10/27/94 Add -V option.
448: v248 11/5/94 Add -V option to lesskey.
449: v249 11/5/94 Remove -f flag from lesskey; default
450: input file is ~/.lesskey.in, not stdin.
451: v250 11/7/94 Lesskey input file "-" means stdin.
452: v251 11/9/94 Convert cfgetospeed result to ospeed.
453: (Thanks to Andrew Chernov)
454: v252 11/16/94 Change default lesskey input file from
455: .lesskey.in to .lesskey.
456: Posted to prep.ai.mit.edu
457: -----------------------------------------------------------------
458: v253 11/21/94 Fix bug when tags file has a backslash.
459: v254 12/6/94 Fix -k option.
460: v255 12/8/94 Add #define EXAMINE to disable :e etc.
461: v256 12/10/94 Change highlighting: only highlite search
462: results (but now it is reliable).
463: v257 12/10/94 Add goto_line and repaint_highlight
464: to optimize highlight repaints.
465: v258 12/12/94 Fixup in hilite_line if BS_SPECIAL.
466: v259 12/12/94 Convert to autoconf 2.0.
467: v260 12/13/94 Add SECURE define.
468: v261 12/14/94 Use system WERASE char as EC_W_BACKSPACE.
469: v262 12/16/94 Add -g/-G flag and screen_hilite.
470: v263 12/20/94 Reimplement/optimize -G flag behavior.
471: v264 12/23/94 Allow EXTRA string after line-edit cmd
472: in lesskey file.
473: v265 12/24/94 Add LESSOPEN=|cmd syntax.
474: v266 12/26/94 Add -I flag.
475: v267 12/28/94 Formalize the four-byte header emitted
476: by a LESSOPEN pipe.
477: v268 12/28/94 Get rid of four-byte header.
478: v269 1/2/95 Close alt file before open new one.
479: Avoids multiple popen().
480: v270 1/3/95 Use VISUAL; use S_ISDIR/S_ISREG; fix
481: config problem with Solaris POSIX regcomp.
482: v271 1/4/95 Don't quit on read error.
483: v272 1/5/95 Get rid of -L.
484: v273 1/6/95 Fix ch_ungetchar bug; don't call
485: LESSOPEN on a pipe.
486: v274 1/6/95 Ported to OS/2 (thanks to Kai Uwe Rommel)
487: v275 1/18/95 Fix bug if toggle -G at EOF.
488: v276 1/30/95 Fix OS/2 version.
489: v277 1/31/95 Add "next" charset; don't display ^X
490: for X > 128.
491: v278 2/14/95 Change default for -G.
492: Posted to prep.ai.mit.edu
493: -----------------------------------------------------------------
494: v279 2/22/95 Add GNU options --help, --version.
495: Minor config fixes.
496: v280 2/24/95 Clean up calls to glob(); don't set #
497: if we can't open the new file.
498: v281 2/24/95 Repeat search should turn on hilites.
499: v282 3/2/95 Minor fixes.
500: v283 3/2/95 Fix homefile; make OS2 look in $HOME.
501: v284 3/2/95 Error if "v" on LESSOPENed file;
502: "%" figures out file size on pipe.
503: v285 3/7/95 Don't set # in lsystem;
504: lesskey try $HOME first.
505: v286 3/7/95 Reformat change history (too much free time?).
506: v287 3/8/95 Fix hilite bug if overstrike multiple chars.
507: v288 3/8/95 Allow lesskey to override get_editkey keys.
508: v289 3/9/95 Fix adj_hilite bug when line gets processed by
509: hilite_line more than once.
510: v290 3/9/95 Make configure automatically. Fix Sequent problem
511: with incompatible sigsetmask().
512:
513: */
514:
515: char version[] = "290";