projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 89edd2cf WJ |
1 | /* |
| 2 | * less | |
| 3 | * Copyright (c) 1984,1985,1989 Mark Nudelman | |
| 4 | * | |
| 5 | * This program may be freely used and/or modified, | |
| 6 | * with the following provisions: | |
| 7 | * 1. This notice and the above copyright notice must remain intact. | |
| 8 | * 2. Neither this program, nor any modification of it, | |
| 9 | * may be sold for profit without written consent of the author. | |
| 10 | * | |
| 11 | * --------------------------------------------------------------- | |
| 12 | * | Special note to the person who ported "less" to the Amiga: | | |
| 13 | * | If you're going to be vain enough to splash your name on | | |
| 14 | * | the screen every time someone runs less, you might at | | |
| 15 | * | least credit the author. | | |
| 16 | * --------------------------------------------------------------- | |
| 17 | * | |
| 18 | * This program is a paginator similar to "more", | |
| 19 | * but allows you to move both forward and backward in the file. | |
| 20 | * Commands are based on "more" and "vi". | |
| 21 | * | |
| 22 | * ----------------------- CHANGES --------------------------------- | |
| 23 | * | |
| 24 | * Allowed use on standard input 1/29/84 markn | |
| 25 | * Added E, N, P commands 2/1/84 markn | |
| 26 | * Added '=' command, 'stop' signal handling 4/17/84 markn | |
| 27 | * Added line folding 4/20/84 markn | |
| 28 | * v2: Fixed '=' command to use BOTTOM_PLUS_ONE, | |
| 29 | * instead of TOP, added 'p' & 'v' commands 4/27/84 markn | |
| 30 | * v3: Added -m and -t options, '-' command 5/3/84 markn | |
| 31 | * v4: Added LESS environment variable 5/3/84 markn | |
| 32 | * v5: New comments, fixed '-' command slightly 5/3/84 markn | |
| 33 | * v6: Added -Q, visual bell 5/15/84 markn | |
| 34 | * v7: Fixed jump_back(n) bug: n should count real | |
| 35 | * lines, not folded lines. Also allow number | |
| 36 | * on G command. 5/24/84 markn | |
| 37 | * v8: Re-do -q and -Q commands 5/30/84 markn | |
| 38 | * v9: Added "+<cmd>" argument 9/25/84 markn | |
| 39 | * v10: Fixed bug in -b<n> argument processing 10/10/84 markn | |
| 40 | * v11: Made error() ring bell if \n not entered. 10/18/84 markn | |
| 41 | * ----------------------------------------------------------------- | |
| 42 | * v12: Reorganized signal handling and made | |
| 43 | * portable to 4.2bsd. 2/13/85 mark | |
| 44 | * v13: Reword error message for '-' command. 2/16/85 mark | |
| 45 | * v14: Added -bf and -bp variants of -b. 2/22/85 mark | |
| 46 | * v15: Miscellaneous changes. 2/25/85 mark | |
| 47 | * v16: Added -u flag for backspace processing. 3/13/85 mark | |
| 48 | * v17: Added j and k commands, | |
| 49 | * changed -t default. 4/13/85 mark | |
| 50 | * v18: Rewrote signal handling code. 4/20/85 mark | |
| 51 | * v19: Got rid of "verbose" eq_message(). 5/2/85 mark | |
| 52 | * Made search() scroll in some cases. | |
| 53 | * v20: Fixed screen.c ioctls for System V. 5/21/85 mark | |
| 54 | * v21: Fixed some first_cmd bugs. 5/23/85 mark | |
| 55 | * v22: Added support for no RECOMP nor REGCMP. 5/24/85 mark | |
| 56 | * v23: Miscellanous changes and prettying up. 5/25/85 mark | |
| 57 | * Posted to USENET. | |
| 58 | * ----------------------------------------------------------------- | |
| 59 | * v24: Added ti,te terminal init & de-init 6/3/85 Mike Kersenbrock | |
| 60 | * v25: Added -U flag, standout mode underlining. 6/8/85 mark | |
| 61 | * v26: Added -M flag. 6/9/85 mark | |
| 62 | * Use underline termcap (us) if it exists. | |
| 63 | * v27: Renamed some variables to make unique in 6/15/85 mark | |
| 64 | * 6 chars. Minor fix to -m. | |
| 65 | * v28: Fixed right margin bug. 6/28/85 mark | |
| 66 | * v29: Incorporated M.Rose's changes to signal.c 6/28/85 mark | |
| 67 | * v30: Fixed stupid bug in argument processing. 6/29/85 mark | |
| 68 | * v31: Added -p flag, changed repaint algorithm. 7/15/85 mark | |
| 69 | * Added kludge for magic cookie terminals. | |
| 70 | * v32: Added cat_file if output not a tty. 7/16/85 mark | |
| 71 | * v33: Added -e flag and EDITOR. 7/23/85 mark | |
| 72 | * v34: Added -s flag. 7/26/85 mark | |
| 73 | * v35: Rewrote option handling; added option.c. 7/27/85 mark | |
| 74 | * v36: Fixed -e flag to work if not last file. 7/29/85 mark | |
| 75 | * v37: Added -x flag. 8/10/85 mark | |
| 76 | * v38: Changed prompting; created prompt.c. 8/19/85 mark | |
| 77 | * v39: (Not -p) does not initially clear screen. 8/24/85 mark | |
| 78 | * v40: Added "skipping" indicator in forw(). 8/26/85 mark | |
| 79 | * Posted to USENET. | |
| 80 | * ----------------------------------------------------------------- | |
| 81 | * v41: ONLY_RETURN, control char commands, 9/17/85 mark | |
| 82 | * faster search, other minor fixes. | |
| 83 | * v42: Added ++ command line syntax; 9/25/85 mark | |
| 84 | * ch_fsize for pipes. | |
| 85 | * v43: Added -h flag, changed prim.c algorithms. 10/15/85 mark | |
| 86 | * v44: Made END print in all cases of eof; 10/16/85 mark | |
| 87 | * ignore SIGTTOU after receiving SIGTSTP. | |
| 88 | * v45: Never print backspaces unless -u. 10/16/85 mark | |
| 89 | * v46: Backwards scroll in jump_loc. 10/24/85 mark | |
| 90 | * v47: Fixed bug in edit(): *first_cmd==0 10/30/85 mark | |
| 91 | * v48: Use TIOCSETN instead of TIOCSETP. 11/16/85 mark | |
| 92 | * Added marks (m and ' commands). | |
| 93 | * Posted to USENET. | |
| 94 | * ----------------------------------------------------------------- | |
| 95 | * v49: Fixed bug: signal didn't clear mcc. 1/9/86 mark | |
| 96 | * v50: Added ' (quote) to gomark. 1/15/86 mark | |
| 97 | * v51: Added + cmd, fixed problem if first_cmd | |
| 98 | * fails, made g cmd sort of "work" on pipes | |
| 99 | * even if bof is no longer buffered. 1/16/86 mark | |
| 100 | * v52: Made short files work better. 1/17/86 mark | |
| 101 | * v53: Added -P option. 1/20/86 mark | |
| 102 | * v54: Changed help to use HELPFILE. 1/20/86 mark | |
| 103 | * v55: Messages work better if not tty output. 1/23/86 mark | |
| 104 | * v56: Added -l option. 1/24/86 mark | |
| 105 | * v57: Fixed -l to get confirmation before | |
| 106 | * overwriting an existing file. 1/31/86 mark | |
| 107 | * v58: Added filename globbing. 8/28/86 mark | |
| 108 | * v59: Fixed some bugs with very long filenames. 9/15/86 mark | |
| 109 | * v60: Incorporated changes from Leith (Casey) | |
| 110 | * Leedom for boldface and -z option. 9/26/86 mark | |
| 111 | * v61: Got rid of annoying repaints after ! cmd. 9/26/86 mark | |
| 112 | * Posted to USENET. | |
| 113 | * ----------------------------------------------------------------- | |
| 114 | * v62: Added is_directory(); change -z default to | |
| 115 | * -1 instead of 24; cat-and-exit if -e and | |
| 116 | * file is less than a screenful. 12/23/86 mark | |
| 117 | * v63: Fixed bug in cat-and-exit if > 1 file. 1/8/87 mark | |
| 118 | * v64: Changed puts/putstr, putc/putchr, | |
| 119 | * getc/getchr to avoid name conflict with | |
| 120 | * stdio functions. 1/12/87 mark | |
| 121 | * v65: Allowed '-' command to change NUMBER | |
| 122 | * valued options (thanks to Gary Puckering) 1/26/87 mark | |
| 123 | * v66: Fixed bug: prepaint should use force=1. 2/13/87 mark | |
| 124 | * v67: Added !! and % expansion to ! command. 2/24/87 mark | |
| 125 | * v68: Added SIGWINCH and TIOCGWINSZ support; | |
| 126 | * changed is_directory to bad_file. | |
| 127 | * (thanks to J. Robert Ward) 2/25/87 mark | |
| 128 | * v69: Added SIGWIND and WIOCGETD (for Unix PC). 2/25/87 mark | |
| 129 | * v70: Changed help cmd from 'h' to 'H'; better | |
| 130 | * error msgs in bad_file, errno_message. 3/13/87 mark | |
| 131 | * v71: Changed -p to -c, made triple -c/-C | |
| 132 | * for clear-eol like more's -c. 5/11/87 mark | |
| 133 | * v72: Added -E, -L, use $SHELL in lsystem(). 6/26/87 mark | |
| 134 | * (thanks to Steve Spearman) | |
| 135 | * v73: Allow Examine "#" for previous file. 6/26/87 mark | |
| 136 | * Posted to USENET 8/25/87. | |
| 137 | * ----------------------------------------------------------------- | |
| 138 | * v74: Fix conflict in EOF symbol with stdio.h, 9/18/87 mark | |
| 139 | * Make os.c more portable to BSD. | |
| 140 | * v75: Fix problems in get_term (thanks to 9/23/87 mark | |
| 141 | * Paul Eggert); new backwards scrolling in | |
| 142 | * jump_loc (thanks to Marion Hakanson). | |
| 143 | * v76: Added -i flag; allow single "!" to 9/23/87 mark | |
| 144 | * invoke a shell (thanks to Franco Barber). | |
| 145 | * v77: Added -n flag and line number support. 9/24/87 mark | |
| 146 | * v78: Fixed problem with prompts longer than 9/25/87 mark | |
| 147 | * the screen width. | |
| 148 | * v79: Added the _ command. 9/29/87 mark | |
| 149 | * v80: Allow signal to break out of linenum scan. 10/6/87 mark | |
| 150 | * v81: Allow -b to be changed from within less. 10/6/87 mark | |
| 151 | * v82: Add cmd_decode to use a table for key 10/7/87 mark | |
| 152 | * binding (thanks to David Nason). | |
| 153 | * v83: Allow .less file for user-defined keys. 10/9/87 mark | |
| 154 | * v84: Fix -e/-E problems (thanks to Felix Lee). 10/11/87 mark | |
| 155 | * v85: Search now keeps track of line numbers. 10/15/87 mark | |
| 156 | * v86: Added -B option and autobuf; fixed 10/20/87 mark | |
| 157 | * "pipe error" bug. | |
| 158 | * v87: Fix bug re BSD signals while reading file. 3/1/88 mark | |
| 159 | * v88: Use new format for -P option (thanks to 3/12/88 mark | |
| 160 | * der Mouse), allow "+-c" without message, | |
| 161 | * fix bug re BSD hangup. | |
| 162 | * v89: Turn off line numbers if linenum scan 3/18/88 mark | |
| 163 | * is interrupted. | |
| 164 | * v90: Allow -P from within less. 3/30/88 mark | |
| 165 | * v91: Added tags file support (new -t option) 3/30/88 mark | |
| 166 | * (thanks to Brian Campbell). | |
| 167 | * v92: Added -+option syntax. 4/4/88 mark | |
| 168 | * v93: Add support for slow input (thanks to 4/11/88 mark | |
| 169 | * Joe Orost & apologies for taking almost | |
| 170 | * 3 years to get this in!) | |
| 171 | * v94: Redo reading/signal stuff. 4/11/88 mark | |
| 172 | * v95: Repaint screen better after signal. 4/20/88 mark | |
| 173 | * v96: Add /! and ?! commands. 4/21/88 mark | |
| 174 | * v97: Allow -l/-L from within less. 5/17/88 mark | |
| 175 | * Eliminate some static arrays (use calloc). | |
| 176 | * Posted to USENET. | |
| 177 | * ----------------------------------------------------------------- | |
| 178 | * v98: Fix incorrect calloc call; uninitialized 10/14/88 mark | |
| 179 | * var in exec_mca; core dump on unknown TERM. | |
| 180 | * Make v cmd work if past last line of file. | |
| 181 | * Fix some signal bugs. | |
| 182 | * v99: Allow space between -X and string, 10/29/88 mark | |
| 183 | * when X is a string-valued option. | |
| 184 | * v100: Fix globbing bug when $SHELL not set; 1/5/89 mark | |
| 185 | * allow spaces after -t command. | |
| 186 | * v101: Fix problem with long (truncated) lines 1/6/89 mark | |
| 187 | * in tags file (thanks to Neil Dixon). | |
| 188 | * v102: Fix bug with E# when no prev file; 1/6/89 mark | |
| 189 | * allow spaces after -l command. | |
| 190 | * v103: Add -N, -f and -? options. Add z and w 3/14/89 mark | |
| 191 | * commands. Add %L for prompt strings. | |
| 192 | * v104: Added EDITPROTO. 3/16/89 mark | |
| 193 | * v105: Fix bug in find_linenum which cached 3/20/89 mark | |
| 194 | * incorrectly on long lines. | |
| 195 | * v106: Added -k option and multiple lesskey 3/31/89 mark | |
| 196 | * files. | |
| 197 | * v107: Add 8-bit char support and -g option. 4/27/89 mark | |
| 198 | * Split option code into 3 files. | |
| 199 | * v108: Allocate position table dynamically 5/5/89 mark | |
| 200 | * (thanks to Paul Eggert); change % command | |
| 201 | * from "percent" to vi-style brace finder. | |
| 202 | * v109: Added ESC-% command, split prim.c. 5/10/89 mark | |
| 203 | * v110: Fixed bug in + option; fixed repaint bug 5/24/89 mark | |
| 204 | * under Sun windows (thanks to Paul Eggert). | |
| 205 | * v111: Generalized # and % expansion; use 5/25/89 mark | |
| 206 | * calloc for some error messages. | |
| 207 | * v112: Get rid of ESC-%, add {}()[] commands. 5/30/89 mark | |
| 208 | * v113: Optimize lseeks (thanks to Paul Eggert). 5/31/89 mark | |
| 209 | * v114: Added ESC-/ and ESC-/! commands. 7/25/89 mark | |
| 210 | * v115: Added ESC-n command. 7/26/89 mark | |
| 211 | * v116: Added find_pos to optimize g command. 7/31/89 mark | |
| 212 | * v117: Change -f option to -r. 8/1/89 mark | |
| 213 | * v118: Save positions for all previous files, 8/2/89 mark | |
| 214 | * not just the immediately previous one. | |
| 215 | * v119: Save marks across file boundaries. 8/7/89 mark | |
| 216 | * Add file handle stuff. | |
| 217 | * v120: Add :ta command. 8/11/89 mark | |
| 218 | * v121: Add -f option. 8/16/89 mark | |
| 219 | * v122: Fix performance with many buffers. 8/30/89 mark | |
| 220 | * v123: Verbose prompts for string options. 8/31/89 mark | |
| 221 | * Posted beta to USENET. | |
| 222 | * ----------------------------------------------------------------- | |
| 223 | * v124: Reorganize search commands, 9/18/89 mark | |
| 224 | * N = rev, ESC-n = span, add ESC-N. | |
| 225 | * v125: Fix tab bug (thanks to Alex Liu). 9/18/89 mark | |
| 226 | * Fix EOF bug when both -w and -c. | |
| 227 | * v126: Add -j option. 10/25/89 mark | |
| 228 | * v127: Fix problems with blank lines before BOF. 10/27/89 mark | |
| 229 | * v128: Add %bj, etc. to prompt strings. 10/27/89 mark | |
| 230 | * v129: Add -+,-- commands; add set-option and 11/3/89 mark | |
| 231 | * unset-option to lesskey. | |
| 232 | * v130: Generalize A_EXTRA to string, remove 11/6/89 mark | |
| 233 | * set-option, unset-option from lesskey. | |
| 234 | * v131: Changed name of EDITPROTO to LESSEDIT. 11/7/89 mark | |
| 235 | * v132: Allow editing of command prefix. 11/8/89 mark | |
| 236 | * v133: Add -y option (thanks to Jeff Sullivan). 11/16/89 mark | |
| 237 | * v134: Glob filenames in the -l command. 12/1/89 mark | |
| 238 | * v135: Combined {}()[] commands into one, and 12/5/89 mark | |
| 239 | * added ESC-^F and ESC-^B commands. | |
| 240 | * v136: Added -S, -R flags. Added | command. 1/20/90 mark | |
| 241 | * Added warning for binary files. (thanks | |
| 242 | * to Richard Brittain and J. Sullivan). | |
| 243 | * v137: Rewrote horrible pappend code. 1/21/90 mark | |
| 244 | * Added * notation for hi-bit chars. | |
| 245 | * v138: Fix magic cookie terminal handling. 1/24/90 mark | |
| 246 | * Get rid of "cleanup" loop in ch_get. | |
| 247 | * v139: Added MSDOS support. (many thanks 1/27/90 mark | |
| 248 | * to Richard Brittain). | |
| 249 | * v140: Editing a new file adds it to the 2/7/90 mark | |
| 250 | * command line list. | |
| 251 | * v141: Add edit_list for editing >1 file. 2/8/90 mark | |
| 252 | * v142: Add :x command. 2/10/90 mark | |
| 253 | * v143: Add * and @ modifies to search cmds. 2/11/90 mark | |
| 254 | * Change ESC-/ cmd from /@* to / *. | |
| 255 | * v144: Messed around with ch_zero; 3/1/90 mark | |
| 256 | * no real change. | |
| 257 | * v145: Added -R and -v/-V for MSDOS; 3/2/90 mark | |
| 258 | * renamed FILENAME to avoid conflict. | |
| 259 | * v146: Pull cmdbuf functions out of command.c 3/5/90 mark | |
| 260 | * v147: Implement ?@; fix multi-file edit bugs. 3/7/90 mark | |
| 261 | * v148: Fixed bug in :e<file> then :e#. 3/29/90 mark | |
| 262 | * v149: Change error,ierror,query to use PARG. 4/3/90 mark | |
| 263 | * v150: Add LESS_CHARSET, LESS_CHARDEF. 4/6/90 mark | |
| 264 | * v151: Remove -g option; clean up ispipe. 4/13/90 mark | |
| 265 | * v152: lsystem() closes input file, for 4/14/90 mark | |
| 266 | * editors which require exclusive open. | |
| 267 | * v153: Fix bug if SHELL unset; 4/18/90 mark | |
| 268 | * fix bug in overstrike control char. | |
| 269 | * v154: Output to fd 2 via buffer. 4/25/90 mark | |
| 270 | * v155: Ignore -i if uppercase in pattern 4/30/90 mark | |
| 271 | * (thanks to Michael Rendell.) | |
| 272 | * v156: Remove scroll limits in forw() & back(); 5/3/90 mark | |
| 273 | * causes problems with -c. | |
| 274 | * v157: Forward search starts at next real line 5/4/90 mark | |
| 275 | * (not screen line) after jump target. | |
| 276 | * v158: Added F command. 6/14/90 mark | |
| 277 | * v159: Fix bug in exiting: output not flushed. 7/29/90 mark | |
| 278 | * v160: Clear screen before initial output w/ -c. 7/29/90 mark | |
| 279 | * v161: Add -T flag. 7/29/90 mark | |
| 280 | * v162: Fix bug with +F on command line. 8/14/90 mark | |
| 281 | * v163: Added LESSBINFMT variable. 8/21/90 mark | |
| 282 | * v164: Added -p, LINES, COLUMNS and 9/5/90 mark | |
| 283 | * unset mark ' == BOF, for 1003.2 D5. | |
| 284 | * v165: At EOF with -c set, don't display empty 9/6/90 mark | |
| 285 | * screen when try to page forward. | |
| 286 | * v166: Fix G when final line in file wraps. 9/6/90 mark | |
| 287 | * v167: Translate CR/LF -> LF for 1003.2. 9/11/90 mark | |
| 288 | * v168: Return to curr file if "tag not found". 9/13/90 mark | |
| 289 | * v169: G goes to EOF even if file has grown. 12/12/90 mark | |
| 290 | * v170: Add optimization for BSD _setjmp; 1/17/91 mark | |
| 291 | * fix #include ioctl.h TERMIO problem. | |
| 292 | * (thanks to Paul Eggert) | |
| 293 | * Posted to USENET. | |
| 294 | * ----------------------------------------------------------------- | |
| 295 | * v171: Fix -? bug in get_filename. 3/6/91 mark | |
| 296 | * v172: Fix G bug in empty file. 3/15/91 mark | |
| 297 | * Fix bug with ?\n and -i and uppercase | |
| 298 | * pattern at EOF! | |
| 299 | * (thanks to Paul Eggert) | |
| 300 | * v173: Change N cmd to not permanently change 3/17/91 mark | |
| 301 | * direction. (thanks to Brian Matthews) | |
| 302 | * v174: Fix bug with namelogfile not getting 3/18/91 mark | |
| 303 | * cleared when change files. | |
| 304 | * v175: Fix bug with ++cmd on command line. 3/18/91 mark | |
| 305 | * (thanks to Jim Meyering) | |
| 306 | * v176: Change | to not force current screen, 4/2/91 mark | |
| 307 | * include marked line, start/end from | |
| 308 | * top of screen. Improve search speed. | |
| 309 | * (thanks to Don Mears) | |
| 310 | * v177: Add LESSHELP variable. 4/2/91 mark | |
| 311 | * Fix bug with F command with -e. | |
| 312 | * Try /dev/tty for input before using fd 2. | |
| 313 | */ | |
| 314 | ||
| 315 | char version[] = "@(#) less version 177"; |