1/* 2 * Copyright (C) 1984-2012 Mark Nudelman 3 * 4 * You may distribute under the terms of either the GNU General Public 5 * License or the Less License, as specified in the README file. 6 * 7 * For more information, see the README file. 8 */ 9 10 11/* 12----------------------- CHANGE HISTORY -------------------------- 13 14 1/29/84 Allowed use on standard input 15 2/1/84 Added E, N, P commands 16 4/17/84 Added '=' command, 'stop' signal handling 17 4/20/84 Added line folding 18v2 4/27/84 Fixed '=' command to use BOTTOM_PLUS_ONE, 19 instead of TOP, added 'p' & 'v' commands 20v3 5/3/84 Added -m and -t options, '-' command 21v4 5/3/84 Added LESS environment variable 22v5 5/3/84 New comments, fixed '-' command slightly 23v6 5/15/84 Added -Q, visual bell 24v7 5/24/84 Fixed jump_back(n) bug: n should count real 25 lines, not folded lines. Also allow number on G command. 26v8 5/30/84 Re-do -q and -Q commands 27v9 9/25/84 Added "+<cmd>" argument 28v10 10/10/84 Fixed bug in -b<n> argument processing 29v11 10/18/84 Made error() ring bell if \n not entered. 30----------------------------------------------------------------- 31v12 2/13/85 Reorganized signal handling and made portable to 4.2bsd. 32v13 2/16/85 Reword error message for '-' command. 33v14 2/22/85 Added -bf and -bp variants of -b. 34v15 2/25/85 Miscellaneous changes. 35v16 3/13/85 Added -u flag for backspace processing. 36v17 4/13/85 Added j and k commands, changed -t default. 37v18 4/20/85 Rewrote signal handling code. 38v19 5/2/85 Got rid of "verbose" eq_message(). 39 Made search() scroll in some cases. 40v20 5/21/85 Fixed screen.c ioctls for System V. 41v21 5/23/85 Fixed some first_cmd bugs. 42v22 5/24/85 Added support for no RECOMP nor REGCMP. 43v23 5/25/85 Miscellanous changes and prettying up. 44 Posted to USENET. 45----------------------------------------------------------------- 46v24 6/3/85 Added ti,te terminal init & de-init. 47 (Thanks to Mike Kersenbrock) 48v25 6/8/85 Added -U flag, standout mode underlining. 49v26 6/9/85 Added -M flag. 50 Use underline termcap (us) if it exists. 51v27 6/15/85 Renamed some variables to make unique in 52 6 chars. Minor fix to -m. 53v28 6/28/85 Fixed right margin bug. 54v29 6/28/85 Incorporated M.Rose's changes to signal.c 55v30 6/29/85 Fixed stupid bug in argument processing. 56v31 7/15/85 Added -p flag, changed repaint algorithm. 57 Added kludge for magic cookie terminals. 58v32 7/16/85 Added cat_file if output not a tty. 59v33 7/23/85 Added -e flag and EDITOR. 60v34 7/26/85 Added -s flag. 61v35 7/27/85 Rewrote option handling; added option.c. 62v36 7/29/85 Fixed -e flag to work if not last file. 63v37 8/10/85 Added -x flag. 64v38 8/19/85 Changed prompting; created prompt.c. 65v39 8/24/85 (Not -p) does not initially clear screen. 66v40 8/26/85 Added "skipping" indicator in forw(). 67 Posted to USENET. 68----------------------------------------------------------------- 69v41 9/17/85 ONLY_RETURN, control char commands, 70 faster search, other minor fixes. 71v42 9/25/85 Added ++ command line syntax; 72 ch_fsize for pipes. 73v43 10/15/85 Added -h flag, changed prim.c algorithms. 74v44 10/16/85 Made END print in all cases of eof; 75 ignore SIGTTOU after receiv ing SIGTSTP. 76v45 10/16/85 Never print backspaces unless -u. 77v46 10/24/85 Backwards scroll in jump_loc. 78v47 10/30/85 Fixed bug in edit(): *first_cmd==0 79v48 11/16/85 Use TIOCSETN instead of TIOCSETP. 80 Added marks (m and ' commands). 81 Posted to USENET. 82----------------------------------------------------------------- 83v49 1/9/86 Fixed bug: signal didn't clear mcc. 84v50 1/15/86 Added ' (quote) to gomark. 85v51 1/16/86 Added + cmd, fixed problem if first_cmd 86 fails, made g cmd sort of "work" on pipes 87 ev en if bof is no longer buffered. 88v52 1/17/86 Made short files work better. 89v53 1/20/86 Added -P option. 90v54 1/20/86 Changed help to use HELPFILE. 91v55 1/23/86 Messages work better if not tty output. 92v56 1/24/86 Added -l option. 93v57 1/31/86 Fixed -l to get confirmation before 94 ov erwriting an existing file. 95v58 8/28/86 Added filename globbing. 96v59 9/15/86 Fixed some bugs with very long filenames. 97v60 9/26/86 Incorporated changes from Leith (Casey) 98 Leedom for boldface and -z option. 99v61 9/26/86 Got rid of annoying repaints after ! cmd. 100 Posted to USENET. 101----------------------------------------------------------------- 102v62 12/23/86 Added is_directory(); change -z default to 103 -1 instead of 24; cat-and-exit if -e and 104 file is less than a screenful. 105v63 1/8/87 Fixed bug in cat-and-exit if > 1 file. 106v64 1/12/87 Changed puts/putstr, putc/putchr, 107 getc/getchr to av oid name conflict with 108 stdio functions. 109v65 1/26/87 Allowed '-' command to change NUMBER 110 v alued options (thanks to Gary Puckering) 111v66 2/13/87 Fixed bug: prepaint should use force=1. 112v67 2/24/87 Added !! and % expansion to ! command. 113v68 2/25/87 Added SIGWINCH and TIOCGWINSZ support; 114 changed is_directory to bad_file. 115 (thanks to J. Robert Ward) 116v69 2/25/87 Added SIGWIND and WIOCGETD (for Unix PC). 117v70 3/13/87 Changed help cmd from 'h' to 'H'; better 118 error msgs in bad_file, errno_message. 119v71 5/11/87 Changed -p to -c, made triple -c/-C 120 for clear-eol like more's -c. 121v72 6/26/87 Added -E, -L, use $SHELL in lsystem(). 122 (thanks to Stev e Spearman) 123v73 6/26/87 Allow Examine "#" for previous file. 124 Posted to USENET 8/25/87. 125----------------------------------------------------------------- 126v74 9/18/87 Fix conflict in EOF symbol with stdio.h, 127 Make os.c more portable to BSD. 128v75 9/23/87 Fix problems in get_term (thanks to 129 Paul Eggert); new backwards scrolling in 130 jump_loc (thanks to Marion Hakanson). 131v76 9/23/87 Added -i flag; allow single "!" to 132 inv oke a shell (thanks to Franco Barber). 133v77 9/24/87 Added -n flag and line number support. 134v78 9/25/87 Fixed problem with prompts longer than 135 the screen width. 136v79 9/29/87 Added the _ command. 137v80 10/6/87 Allow signal to break out of linenum scan. 138v81 10/6/87 Allow -b to be changed from within less. 139v82 10/7/87 Add cmd_decode to use a table for key 140 binding (thanks to Dav id Nason). 141v83 10/9/87 Allow .less file for user-defined keys. 142v84 10/11/87 Fix -e/-E problems (thanks to Felix Lee). 143v85 10/15/87 Search now keeps track of line numbers. 144v86 10/20/87 Added -B option and autobuf; fixed 145 "pipe error" bug. 146v87 3/1/88 Fix bug re BSD signals while reading file. 147v88 3/12/88 Use new format for -P option (thanks to 148 der Mouse), allow "+-c" without message, 149 fix bug re BSD hangup. 150v89 3/18/88 Turn off line numbers if linenum scan 151 is interrupted. 152v90 3/30/88 Allow -P from within less. 153v91 3/30/88 Added tags file support (new -t option) 154 (thanks to Brian Campbell). 155v92 4/4/88 Added -+option syntax. 156v93 4/11/88 Add support for slow input (thanks to 157 Joe Orost & apologies for taking almost 158 3 years to get this in!) 159v94 4/11/88 Redo reading/signal stuff. 160v95 4/20/88 Repaint screen better after signal. 161v96 4/21/88 Add /! and ?! commands. 162v97 5/17/88 Allow -l/-L from within less. 163 Eliminate some static arrays (use calloc). 164 Posted to USENET. 165----------------------------------------------------------------- 166v98 10/14/88 Fix incorrect calloc call; uninitialized 167 var in exec_mca; core dump on unknown TERM. 168 Make v cmd work if past last line of file. 169 Fix some signal bugs. 170v99 10/29/88 Allow space between -X and string, 171 when X is a string-valued option. 172v100 1/5/89 Fix globbing bug when $SHELL not set; 173 allow spaces after -t command. 174v101 1/6/89 Fix problem with long (truncated) lines 175 in tags file (thanks to Neil Dixon). 176v102 1/6/89 Fix bug with E# when no prev file; 177 allow spaces after -l command. 178v103 3/14/89 Add -N, -f and -? options. Add z and w 179 commands. Add %L for prompt strings. 180v104 3/16/89 Added EDITPROTO. 181v105 3/20/89 Fix bug in find_linenum which cached 182 incorrectly on long lines. 183v106 3/31/89 Added -k option and multiple lesskey 184 files. 185v107 4/27/89 Add 8-bit char support and -g option. 186 Split option code into 3 files. 187v108 5/5/89 Allocate position table dynamically 188 (thanks to Paul Eggert); change % command 189 from "percent" to vi-style brace finder. 190v109 5/10/89 Added ESC-% command, split prim.c. 191v110 5/24/89 Fixed bug in + option; fixed repaint bug 192 under Sun windows (thanks to Paul Eggert). 193v111 5/25/89 Generalized # and % expansion; use 194 calloc for some error messages. 195v112 5/30/89 Get rid of ESC-%, add {}()[] commands. 196v113 5/31/89 Optimize lseeks (thanks to Paul Eggert). 197v114 7/25/89 Added ESC-/ and ESC-/! commands. 198v115 7/26/89 Added ESC-n command. 199v116 7/31/89 Added find_pos to optimize g command. 200v117 8/1/89 Change -f option to -r. 201v118 8/2/89 Save positions for all previous files, 202 not just the immediately previous one. 203v119 8/7/89 Save marks across file boundaries. 204 Add file handle stuff. 205v120 8/11/89 Add :ta command. 206v121 8/16/89 Add -f option. 207v122 8/30/89 Fix performance with many buffers. 208v123 8/31/89 Verbose prompts for string options. 209 Posted beta to USENET. 210----------------------------------------------------------------- 211v124 9/18/89 Reorganize search commands, 212 N = rev, ESC-n = span, add ESC-N. 213v125 9/18/89 Fix tab bug (thanks to Alex Liu). 214 Fix EOF bug when both -w and -c. 215v126 10/25/89 Add -j option. 216v127 10/27/89 Fix problems with blank lines before BOF. 217v128 10/27/89 Add %bj, etc. to prompt strings. 218v129 11/3/89 Add -+,-- commands; add set-option and 219 unset-option to lesskey. 220v130 11/6/89 Generalize A_EXTRA to string, remove 221 set-option, unset-option from lesskey. 222v131 11/7/89 Changed name of EDITPROTO to LESSEDIT. 223v132 11/8/89 Allow editing of command prefix. 224v133 11/16/89 Add -y option (thanks to Jeff Sullivan). 225v134 12/1/89 Glob filenames in the -l command. 226v135 12/5/89 Combined {}()[] commands into one, and 227 added ESC-^F and ESC-^B commands. 228v136 1/20/90 Added -S, -R flags. Added | command. 229 Added warning for binary files. (thanks 230 to Richard Brittain and J. Sullivan). 231v137 1/21/90 Rewrote horrible pappend code. 232 Added * notation for hi-bit chars. 233v138 1/24/90 Fix magic cookie terminal handling. 234 Get rid of "cleanup" loop in ch_get. 235v139 1/27/90 Added MSDOS support. (many thanks 236 to Richard Brittain). 237v140 2/7/90 Editing a new file adds it to the 238 command line list. 239v141 2/8/90 Add edit_list for editing >1 file. 240v142 2/10/90 Add :x command. 241v143 2/11/90 Add * and @ modifies to search cmds. 242 Change ESC-/ cmd from /@* to / *. 243v144 3/1/90 Messed around with ch_zero; 244 no real change. 245v145 3/2/90 Added -R and -v/-V for MSDOS; 246 renamed FILENAME to avoid conflict. 247v146 3/5/90 Pull cmdbuf functions out of command.c 248v147 3/7/90 Implement ?@; fix multi-file edit bugs. 249v148 3/29/90 Fixed bug in :e<file> then :e#. 250v149 4/3/90 Change error,ierror,query to use PARG. 251v150 4/6/90 Add LESS_CHARSET, LESS_CHARDEF. 252v151 4/13/90 Remove -g option; clean up ispipe. 253v152 4/14/90 lsystem() closes input file, for 254 editors which require exclusive open. 255v153 4/18/90 Fix bug if SHELL unset; 256 fix bug in overstrike control char. 257v154 4/25/90 Output to fd 2 via buffer. 258v155 4/30/90 Ignore -i if uppercase in pattern 259 (thanks to Michael Rendell.) 260v156 5/3/90 Remove scroll limits in forw() & back(); 261 causes problems with -c. 262v157 5/4/90 Forward search starts at next real line 263 (not screen line) after jump target. 264v158 6/14/90 Added F command. 265v159 7/29/90 Fix bug in exiting: output not flushed. 266v160 7/29/90 Clear screen before initial output w/ -c. 267v161 7/29/90 Add -T flag. 268v162 8/14/90 Fix bug with +F on command line. 269v163 8/21/90 Added LESSBINFMT variable. 270v164 9/5/90 Added -p, LINES, COLUMNS and 271 unset mark ' == BOF, for 1003.2 D5. 272v165 9/6/90 At EOF with -c set, don't display empty 273 screen when try to page forward. 274v166 9/6/90 Fix G when final line in file wraps. 275v167 9/11/90 Translate CR/LF -> LF for 1003.2. 276v168 9/13/90 Return to curr file if "tag not found". 277v169 12/12/90 G goes to EOF even if file has grown. 278v170 1/17/91 Add optimization for BSD _setjmp; 279 fix #include ioctl.h TERMIO problem. 280 (thanks to Paul Eggert) 281 Posted to USENET. 282----------------------------------------------------------------- 283v171 3/6/91 Fix -? bug in get_filename. 284v172 3/15/91 Fix G bug in empty file. 285 Fix bug with ?\n and -i and uppercase 286 pattern at EOF! 287 (thanks to Paul Eggert) 288v173 3/17/91 Change N cmd to not permanently change 289 direction. (thanks to Brian Matthews) 290v174 3/18/91 Fix bug with namelogfile not getting 291 cleared when change files. 292v175 3/18/91 Fix bug with ++cmd on command line. 293 (thanks to Jim Meyering) 294v176 4/2/91 Change | to not force current screen, 295 include marked line, start/end from 296 top of screen. Improve search speed. 297 (thanks to Don Mears) 298v177 4/2/91 Add LESSHELP variable. 299 Fix bug with F command with -e. 300 Try /dev/tty for input before using fd 2. 301 Patches posted to USENET 4/2/91. 302----------------------------------------------------------------- 303v178 4/8/91 Fixed bug in globbing logfile name. 304 (thanks to Jim Meyering) 305v179 4/9/91 Allow negative -z for screen-relative. 306v180 4/9/91 Clear to eos rather than eol if "db"; 307 don't use "sr" if "da". 308 (thanks to Tor Lillqvist) 309v181 4/18/91 Fixed bug with "negative" chars 80 - FF. 310 (thanks to Benny Sander Hofmann) 311v182 5/16/91 Fixed bug with attribute at EOL. 312 (thanks to Brian Matthews) 313v183 6/1/91 Rewrite linstall to do smart config. 314v184 7/11/91 Process \b in searches based on -u 315 rather than -i. 316v185 7/11/91 -Pxxx sets short prompt; assume SIGWINCH 317 after a SIGSTOP. (thanks to Ken Laprade) 318----------------------------------------------------------------- 319v186 4/20/92 Port to MS-DOS (Microsoft C). 320v187 4/23/92 Added -D option & TAB_COMPLETE_FILENAME. 321v188 4/28/92 Added command line editing features. 322v189 12/8/92 Fix mem overrun in anscreen.c:init; 323 fix edit_list to recover from bin file. 324v190 2/13/93 Make TAB enter one filename at a time; 325 create ^L with old TAB functionality. 326v191 3/10/93 Defer creating "flash" page for MS-DOS. 327v192 9/6/93 Add BACK-TAB. 328v193 9/17/93 Simplify binary_file handling. 329v194 1/4/94 Add rudiments of alt_filename handling. 330v195 1/11/94 Port back to Unix; support keypad. 331----------------------------------------------------------------- 332v196 6/7/94 Fix bug with bad filename; fix IFILE 333 type problem. (thanks to David MacKenzie) 334v197 6/7/94 Fix bug with .less tables inserted wrong. 335v198 6/23/94 Use autoconf installation technology. 336 (thanks to David MacKenzie) 337v199 6/29/94 Fix MS-DOS build (thanks to Tim Wiegman). 338v200 7/25/94 Clean up copyright, minor fixes. 339 Posted to prep.ai.mit.edu 340----------------------------------------------------------------- 341v201 7/27/94 Check for no memcpy; add casts to calloc; 342 look for regcmp in libgen.a. 343 (thanks to Kaveh Ghazi). 344v202 7/28/94 Fix bug in edit_next/edit_prev with 345 non-existent files. 346v203 8/2/94 Fix a variety of configuration bugs on 347 various systems. (thanks to Sakai 348 Kiyotaka, Harald Koenig, Bjorn Brox, 349 Teemu Rantanen, and Thorsten Lockert) 350v204 8/3/94 Use strerror if available. 351 (thanks to J.T. Conklin) 352v205 8/5/94 Fix bug in finding "me" termcap entry. 353 (thanks to Andreas Stolcke) 3548/10/94 v205+: Change BUFSIZ to LBUFSIZE to avoid name 355 conflict with stdio.h. 356 Posted to prep.ai.mit.edu 357----------------------------------------------------------------- 358v206 8/10/94 Use initial_scrpos for -t to avoid 359 displaying first page before init(). 360 (thanks to Dominique Petitpierre) 361v207 8/12/94 Fix bug if stdout is not tty. 362v208 8/16/94 Fix bug in close_altfile if goto err1 363 in edit_ifile. (Thanks to M.J. Hewitt) 364v209 8/16/94 Change scroll to wscroll to avoid 365 conflict with library function. 366v210 8/16/94 Fix bug with bold on 8 bit chars. 367 (thanks to Vitor Duarte) 368v211 8/16/94 Don't quit on EOI in jump_loc / forw. 369v212 8/18/94 Use time_t if available. 370v213 8/20/94 Allow ospeed to be defined in termcap.h. 371v214 8/20/94 Added HILITE_SEARCH, -F, ESC-u cmd. 372 (thanks to Paul Lew and Bob Byrnes) 373v215 8/23/94 Fix -i toggle behavior. 374v216 8/23/94 Process BS in all searches, not only -u. 375v217 8/24/94 Added -X flag. 376v218 8/24/94 Reimplement undo_search. 377v219 8/24/94 Find tags marked with line number 378 instead of pattern. 379v220 8/24/94 Stay at same position after SIG_WINCH. 380v221 8/24/94 Fix bug in file percentage in big file. 381v222 8/25/94 Do better if can't reopen current file. 382v223 8/27/94 Support setlocale. 383 (thanks to Robert Joop) 384v224 8/29/94 Revert v216: process BS in search 385 only if -u. 386v225 9/6/94 Rewrite undo_search again: toggle. 387v226 9/15/94 Configuration fixes. 388 (thanks to David MacKenzie) 389v227 9/19/94 Fixed strerror config problem. 390 Posted to prep.ai.mit.edu 391----------------------------------------------------------------- 392v228 9/21/94 Fix bug in signals: repeated calls to 393 get_editkeys overflowed st_edittable. 394v229 9/21/94 Fix "Nothing to search" error if -a 395 and SRCH_PAST_EOF. 396v230 9/21/94 Don't print extra error msg in search 397 after regerror(). 398v231 9/22/94 Fix hilite bug if search matches 0 chars. 399 (thanks to John Polstra) 400v232 9/23/94 Deal with weird systems that have 401 termios.h but not tcgetattr(). 402 Posted to prep.ai.mit.edu 403----------------------------------------------------------------- 404v233 9/26/94 Use get_term() instead of pos_init() in 405 psignals to re-get lower_left termcap. 406 (Thanks to John Malecki) 407v234 9/26/94 Make MIDDLE closer to middle of screen. 408v235 9/27/94 Use local strchr if system doesn't have. 409v236 9/28/94 Don't use libucb; use libterm if 410 libtermcap & libcurses doesn't work. 411 (Fix for Solaris; thanks to Frank Kaefer) 412v237 9/30/94 Use system isupper() etc if provided. 413 Posted to prep.ai.mit.edu 414----------------------------------------------------------------- 415v238 10/6/94 Make binary non-blinking if LESSBINFMT 416 is set to a string without a *. 417v239 10/7/94 Don't let delimit_word run back past 418 beginning of cmdbuf. 419v240 10/10/94 Don't write into termcap buffer. 420 (Thanks to Benoit Speckel) 421v241 10/13/94 New lesskey file format. 422 Don't expand filenames in search command. 423v242 10/14/94 Allow lesskey specification of "literal". 424v243 10/14/94 Add #stop command to lesskey. 425v244 10/16/94 Add -f flag to lesskey. 426v245 10/25/94 Allow TAB_COMPLETE_FILENAME to be undefd. 427v246 10/27/94 Move help file to /usr/local/share. 428v247 10/27/94 Add -V option. 429v248 11/5/94 Add -V option to lesskey. 430v249 11/5/94 Remove -f flag from lesskey; default 431 input file is ~/.lesskey.in, not stdin. 432v250 11/7/94 Lesskey input file "-" means stdin. 433v251 11/9/94 Convert cfgetospeed result to ospeed. 434 (Thanks to Andrew Chernov) 435v252 11/16/94 Change default lesskey input file from 436 .lesskey.in to .lesskey. 437 Posted to prep.ai.mit.edu 438----------------------------------------------------------------- 439v253 11/21/94 Fix bug when tags file has a backslash. 440v254 12/6/94 Fix -k option. 441v255 12/8/94 Add #define EXAMINE to disable :e etc. 442v256 12/10/94 Change highlighting: only highlite search 443 results (but now it is reliable). 444v257 12/10/94 Add goto_line and repaint_highlight 445 to optimize highlight repaints. 446v258 12/12/94 Fixup in hilite_line if BS_SPECIAL. 447v259 12/12/94 Convert to autoconf 2.0. 448v260 12/13/94 Add SECURE define. 449v261 12/14/94 Use system WERASE char as EC_W_BACKSPACE. 450v262 12/16/94 Add -g/-G flag and screen_hilite. 451v263 12/20/94 Reimplement/optimize -G flag behavior. 452v264 12/23/94 Allow EXTRA string after line-edit cmd 453 in lesskey file. 454v265 12/24/94 Add LESSOPEN=|cmd syntax. 455v266 12/26/94 Add -I flag. 456v267 12/28/94 Formalize the four-byte header emitted 457 by a LESSOPEN pipe. 458v268 12/28/94 Get rid of four-byte header. 459v269 1/2/95 Close alt file before open new one. 460 Avoids multiple popen(). 461v270 1/3/95 Use VISUAL; use S_ISDIR/S_ISREG; fix 462 config problem with Solaris POSIX regcomp. 463v271 1/4/95 Don't quit on read error. 464v272 1/5/95 Get rid of -L. 465v273 1/6/95 Fix ch_ungetchar bug; don't call 466 LESSOPEN on a pipe. 467v274 1/6/95 Ported to OS/2 (thanks to Kai Uwe Rommel) 468v275 1/18/95 Fix bug if toggle -G at EOF. 469v276 1/30/95 Fix OS/2 version. 470v277 1/31/95 Add "next" charset; don't display ^X 471 for X > 128. 472v278 2/14/95 Change default for -G. 473 Posted to prep.ai.mit.edu 474----------------------------------------------------------------- 475v279 2/22/95 Add GNU options --help, --version. 476 Minor config fixes. 477v280 2/24/95 Clean up calls to glob(); don't set # 478 if we can't open the new file. 479v281 2/24/95 Repeat search should turn on hilites. 480v282 3/2/95 Minor fixes. 481v283 3/2/95 Fix homefile; make OS2 look in $HOME. 482v284 3/2/95 Error if "v" on LESSOPENed file; 483 "%" figures out file size on pipe. 484v285 3/7/95 Don't set # in lsystem; 485 lesskey try $HOME first. 486v286 3/7/95 Reformat change history (too much free time?). 487v287 3/8/95 Fix hilite bug if overstrike multiple chars. 488v288 3/8/95 Allow lesskey to override get_editkey keys. 489v289 3/9/95 Fix adj_hilite bug when line gets processed by 490 hilite_line more than once. 491v290 3/9/95 Make configure automatically. Fix Sequent problem 492 with incompatible sigsetmask(). 493 Posted to prep.ai.mit.edu 494----------------------------------------------------------------- 495v291 3/21/95 Add #env to lesskey. Fix MS-DOS build. 496 Posted to simtel. 497----------------------------------------------------------------- 498v292 4/24/95 Add MS-DOS support for Borland C. 499 Fix arrow keys in MS-DOS versions. 500v293 4/28/95 Add auto-versioning stuff to make dist. 501v294 5/12/95 Fix Borland build. 502v295 1/20/96 Fix search on squished file; add /@@. 503v296 1/23/96 Allow cmdbuf larger than screen width. 504v297 1/24/96 Don't call termcap if tgetent fails; 505 add #defines for buffers. 506v298 1/24/96 Change @@ to ^K. 507 Add alternate search modifiers ^N, ^F, ^E. 508v299 1/25/96 Fix percent overflow in jump_percent (thanks to Brent Wiese); 509 don't send "ti" after shell command till RETURN pressed. 510v300 1/25/96 Change -U to print tabs as ^I. 511v301 1/30/96 Make hilites work in cmd F output. 512v302 1/31/96 Fix cmd F to notice window-change signals. 513v303 1/31/96 Add ESC-SPACE command. 514v304 2/1/96 Add ^R search modifier; add LESSSECURE. 515v305 2/2/96 Workaround Linux /proc kernel bug; add LESSKEY. 516v306 3/16/96 Minor fixes. 517v307 3/25/96 Allow cmd line arg "--"; fix DOS & OS/2 defines.h. 518v308 4/4/96 Port to OS-9 (thanks to Boisy Pitre); fix -d. 519v309 4/9/96 Fix OS-9 version; fix tags bug with "$". 520v310 4/10/96 Get rid of HELPFILE. 521v311 4/22/96 Add Windows32 support; merge doscreen.c into screen.c. 522v312 4/24/96 Don't quit after "cannot reopen" error. 523v313 4/25/96 Added horizontal scrolling. 524v314 4/26/96 Modified -e to quit on reaching end of a squished file. 525v315 4/26/96 Fix "!;TAB" bug. 526v316 5/2/96 Make "|a" when (a < curr screen) go to end of curr screen. 527v317 5/14/96 Various fixes for the MS-DOS and OS/2 builds. 528 Added ## and %% handling for filenames 529v318 5/29/96 Port to OS-9 Microware compiler; minor fixes 530 (thanks to Martin Gregorie). 531v319 7/8/96 Fix Windows port (thanks to Jeff Paquette). 532v320 7/11/96 Final fixes for Windows port. 533v321 7/18/96 Minor fixes. 534 Posted to Web page. 535----------------------------------------------------------------- 536v322 8/13/96 Fix bug in shell escape from help file; add support for 537 Microsoft Visual C under Windows; numerous small fixes. 538v323 8/19/96 Fixes for Windows version (thanks to Simon Munton); 539 fix for Linux library weirdness (thanks to Jim Diamond); 540 port to DJGPP (thanks to Eli Zaretskii). 541v324 8/21/96 Add support for spaces in filenames (thanks to Simon Munton). 542v325 8/21/96 Add lessecho, for spaces in filenames under Unix. 543v326 8/27/96 Fix DJGPP version. 544v327 9/1/96 Reorganize lglob, make spaces in filenames work better in Unix. 545v328 10/7/96 Append / to directory name in filename completion. 546 Fix MS-DOS and OS-9 versions. 547v329 10/11/96 Fix more MS-DOS bugs; add LESSSEPARATOR; add -" option. 548 Add LESSMETACHARS, LESSMETAESCAPE. 549v330 10/21/96 Minor fixes. 550 Posted to Web page. 551----------------------------------------------------------------- 552v331 4/22/97 Various Windows fixes (thanks to Gurusamy Sarathy). 553v332 4/22/97 Enter filenames from cmd line into edit history. 554 Posted to Web page. 555----------------------------------------------------------------- 556v333 3/4/99 Changed -w to highlite new line after forward movement. 557v334 3/9/99 Avoid overflowing prompt buffer; add %d and %D. 558v335 3/20/99 Add EBCDIC support (thanks to Thomas Dorner). 559 Use HOMEDRIVE/HOMEPATH on Windows (thanks to Preston Bannister). 560 Posted to Web page. 561----------------------------------------------------------------- 562v336 4/8/99 Fix installation bugs. 563v337 4/9/99 Fix another installation bug. 564 Posted to Web page. 565----------------------------------------------------------------- 566v338 4/13/99 Add support for long option names. 567v339 4/18/99 Add \k, long option names to lesskey. Add -^P. Add :d. 568v340 4/21/99 Add regexec2. Fix Windows build. 569 Posted to Web page. 570----------------------------------------------------------------- 571v341 5/6/99 Add -F option; %c & ?c prompt escapes. 572 (Thanks to Michele Maltoni) 573v342 7/22/99 Add system-wide lesskey file; allow GPL or Less License. 574v343 9/23/99 Support UTF-8 (Thanks to Robert Brady). 575 Add %P and ?P in prompts. 576v344 10/27/99 -w highlights target line of g and p commands. 577v345 10/29/99 Make -R pass thru ESC but not other control chars. 578 Posted to Web page. 579----------------------------------------------------------------- 580v346 11/4/99 Fix bugs in long option processing; R cmd should clear hilites. 581 Posted to Web page. 582----------------------------------------------------------------- 583v347 12/13/99 Fixes for DJGPP version (thanks to Eli Zaretskii). 584v348 12/28/99 Fix deleting file with marks (thanks to Dimitar Jekov). 585 Fix color problem in DJGPP version (thanks to Eli Zaretskii). 586v349 1/24/00 Fix minor DJGPP bugs; check environment vars for UTF-8; 587 add --with-editor (thanks to Eli, Markus Kuhn, Thomas Schoepf). 588v350 3/1/00 Fix clear-while-standout bug. 589v351 3/5/00 Change -M and = prompts to show top & bottom line number. 590 Posted to Web page. 591----------------------------------------------------------------- 592v352 3/8/00 Fix scan_option NULL dereference. 593----------------------------------------------------------------- 594v353 3/20/00 Fix SECURE compile bug, allow space after numeric option. 595v354 3/23/00 Add support for PCRE; add --with-regex configure option. 596----------------------------------------------------------------- 597v355 6/28/00 Add -# option (thanks to Andy Levinson). 598v356 7/5/00 Add -J option. 599v357 7/6/00 Support sigprocmask. 600----------------------------------------------------------------- 601v358 7/8/00 Fix problems with #stop in lesskey file. 602 Posted to Web page. 603----------------------------------------------------------------- 604v359 9/10/00 Fixes for Win32 display problems (thanks to Maurizio Vairani). 605v360 1/17/01 Move sysless to etc. 606v361 12/4/01 Add IBM-1047 charset & EBCDIC fixes (thanks to Thomas Dorner). 607 Fix 32 bit dependencies (thanks to Paul Eggert). 608 Fix UTF-8 overstriking (thanks to Robert Brady). 609v362 12/4/01 Make status column show search targets. 610v363 12/6/01 Add --no-keypad option. 611 Add variable width tabstops (thanks to Peter Samuelson). 612v364 12/10/01 Better handling of very long lines in input; 613 Fix horizontal shifting of colored text. 614v365 12/11/01 Fix overstriking of tabs; 615 Add support for global(1) and multiple tag matches 616 (thanks to Shigio Yamaguchi and Tim Vanderhoek). 617v366 12/11/01 Fixes for OS/2 (thanks to Kyosuke Tokoro). 618v367 12/13/01 Allow -D and -x options to terminate without dollar sign; 619 Right/left arrow when entering N are shift cmds, not line edit. 620v368 12/18/01 Update lesskey commands. 621v370 12/23/01 Fix tags error messages. 622 Posted to Web page. 623----------------------------------------------------------------- 624v371 12/26/01 Fix new_file bug; use popen in Windows version; 625 fix some compiler warnings. 626v372 12/29/01 Make -b be in units of 1K. 627v373 1/14/02 Improve handling of filenames containing shell metachars. 628v374 2/7/02 Fix memory leak; fix bug in -x argument parsing. 629v375 4/7/02 Fix searching for SGR sequences; fix SECURE build; 630 add SGR support to DJGPP version (thanks to Eli Zaretskii). 631v376 6/10/02 Fix bug in overstriking mulitbyte UTF-8 characters 632 (thanks to Jungshik Shin). 633 Posted to Web page. 634----------------------------------------------------------------- 635v377 9/10/02 Fix bug in Windows version when file contains CR; 636 fix bug in search highlights with -R; 637 make initial buffer limit really be 64K not unlimited. 638v378 9/30/02 Misc bug fixes and compiler warning cleanup. 639 Posted to Web page. 640----------------------------------------------------------------- 641v379 11/23/02 Add -L option; fix bug with ctrl-K in lesskey files; 642 improve UTF-8 overstriking and underscore overstriking; 643 fix minor man page problems; change to autoconf 2.54. 644v380 11/24/02 Make LINENUM same as POSITION. 645v381 11/28/02 Make -N use 7 columns for line number if possible. 646----------------------------------------------------------------- 647v382 2/3/04 Remove copyrighted code. 648----------------------------------------------------------------- 649v383 2/16/04 Add history file; add -K option; improve UTF-8 handling; 650 fix some signed char bugs (thanks to Christian Biere); 651 fix some upper/lower case bugs (thanks to Bjoern Jacke); 652 add erase2 char (thanks to David Lawrence); 653 add windows charset (thanks to Dimitar Zhekov). 654v384 2/20/04 Improvements in UTF-8 handling. 655v385 2/23/04 Fix UTF-8 output bug. 656----------------------------------------------------------------- 657v386 9/13/05 Improvements to UTF-8 shift & color (thanks to Charles Levert); 658 protect against invalid LESSOPEN and LESSCLOSE values. 659v387 9/14/05 Update Charles Levert's UTF-8 patch. 660v388 9/14/05 Change history behavior; change most sprintf calls to snprintf. 661v389 9/14/05 Fix copy & paste with long lines; improve performance of 662 expand_linebuf; fix crash in init_mlist; 663v390 9/15/05 Show search matches in status column even if -G is set. 664----------------------------------------------------------------- 665v391 9/17/05 Fix bugs. 666v392 10/14/05 Fix line wrapping bug. 667v393 10/19/05 Allow multiple attributes per char; fix bold+underline bug 668 (thanks again to Charles Levert). 669v394 11/8/05 Fix prompt bug; fix compile problem in Windows build. 670----------------------------------------------------------------- 671v395 1/12/07 Update Unicode tables (thanks to Charles Levert); 672 don't chmod if LESSHISTFILE = /dev/null; 673 make -f work for directories; support DESTDIR in Makefile; 674 fix sigset_t detection in configure; 675 make "t" cmd traverse tags in correct order 676v396 1/13/07 Add compatibility with POSIX more. 677v397 3/21/07 Allow decimal point in number for % command; 678 Allow decimal point in number for -j option; 679 Allow n command to fetch last search pattern from history 680 (thanks to arno). 681v398 3/22/07 Don't rewrite history file if not necessary; 682 fix bug when filenames contain "$". 683v399 3/22/07 Don't move to bottom of screen at startup; 684 don't output extraneous newlines. 685v400 3/23/07 Allow search to find pattern after null byte (PCRE and no-regex) 686 (thanks to Michael Constant). 687----------------------------------------------------------------- 688v401 3/24/07 Minor documentation fixes. 689v402 3/30/07 Fix autoconf bug when memcpy etc are inline; 690 fix bug in terminating number following -j option. 691v403 5/25/07 Fix Windows build. 692v404 6/5/07 Fix display bug with F command and long lines. 693v405 6/17/07 Fix display bug when using -w option. 694v406 6/17/07 Fix secure build. 695v407 8/16/07 Fix bugs; support CSI chars. 696v408 10/1/07 Fix bug in -i with non-ASCII chars. 697v409 10/12/07 Fix crash when viewing text with invalid UTF-8 sequences. 698v411 11/6/07 Fix case-insensitive searching with non-ASCII text. 699v412 11/6/07 Use symbolic SEEK constants. 700v413 11/6/07 Fix search highlight bug with non-ASCII text. 701v414 11/6/07 Fix display bug with no-wrap terminals. 702v415 11/14/07 Add --follow-name option. 703v416 11/22/07 Fix crash when searching text with invalid UTF-8 sequences. 704v417 12/31/07 Don't support single-char CSI in UTF-8 mode; 705 fix bug with -R and invalid CSI sequences; 706 fix bug searching text with SGR sequences with -r; 707 emulate SGR sequences in WIN32 build. 708v418 12/31/07 Clean up. 709----------------------------------------------------------------- 710v419 1/16/08 Make CSI char 0x9B work in UTF-8 mode (thanks to Colin Watson). 711v420 2/24/08 Add & command; fix -F option; fix '' after G. 712v421 2/24/08 Ignore filtered lines when searching. 713v422 3/2/08 Output CR at startup. 714v423 5/27/08 Clean up. 715v424 6/16/08 Fix compile bug with pcre; don't filter help file. 716v425 7/14/08 Fix non-ANSI code in list handling in ch.c. 717v426 10/27/08 Fix ignaw terminal handling (thanks to Per Hedeland); 718 fix binary file detection in UTF-8 mode. 719v427 3/16/09 A few Win32 fixes (thanks to Jason Hood). 720v428 3/30/09 Add "|-" syntax to LESSOPEN. 721v429 4/10/09 Fix search highlighting bug with underlined text. 722----------------------------------------------------------------- 723v430 4/22/09 Don't pass "-" to non-pipe LESSOPEN unless it starts with "-". 724v431 4/29/09 Fix highlight bug when match is at end of line. 725v432 6/27/09 Better fix for highlight bugs; 726 fix new problems with ignaw terminals. 727v433 6/28/09 Cleanup search code. 728v434 6/29/09 More cleanup. 729v435 7/04/09 Fix bugs with non-regex filtering. 730v436 7/05/09 Fix memory leak. 731----------------------------------------------------------------- 732v437 7/14/09 Fix bug in handling some long option names; 733 make percentage calculation more accurate. 734v438 12/29/10 Fix bugs with -i/-I and & filtering; 735 exit with status 2 on ctrl-C with -K. 736v439 12/31/10 Add -A option. 737v440 1/5/11 Fix bug displaying prompt after = command. 738v441 1/21/11 Fix semi-infinite loop if no newlines in file; 739 make new -A behavior the default. 740----------------------------------------------------------------- 741v442 3/2/11 Fix search bug. 742 Add ctrl-G line edit command. 743v443 4/9/11 Fix Windows build. 744v444 6/8/11 Fix ungetc bug; remove vestiges of obsolete -l option. 745----------------------------------------------------------------- 746v445 10/19/11 Fix hilite bug in backwards scroll with -J. 747 Fix hilite bug with backspaces. 748 Fix bugs handling SGR sequences in Win32 (thanks to Eric Lee). 749 Add support for GNU regex (thanks to Reuben Thomas). 750v446 5/15/12 Up/down arrows in cmd editing search for matching cmd. 751v447 5/21/12 Add ESC-F command, two-pipe LESSOPEN syntax. 752v448 6/15/12 Print name of regex library in version message. 753v449 6/23/12 Allow config option --with-regex=none. 754v450 7/4/12 Fix EOF bug with ESC-F. 755v451 7/20/12 Fix typo. 756----------------------------------------------------------------- 757v452 10/19/12 Fix --with-regex=none, fix "stty 0", fix Win32. 758 Don't quit if errors in cmd line options. 759v453 10/27/12 Increase buffer sizes. 760v454 11/5/12 Fix typo. 761v455 11/5/12 Fix typo. 762v456 11/8/12 Fix option string incompatibility. 763v457 12/8/12 Use new option string syntax only after --use-backslash. 764v458 4/4/13 Fix display bug in using up/down in cmd buffer. 765*/ 766 767char version[] = "458"; 768