1 /* 2 * Copyright (c) 1988 Mark Nudleman 3 * Copyright (c) 1988 Regents of the University of California. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms are permitted 7 * provided that the above copyright notice and this paragraph are 8 * duplicated in all such forms and that any documentation, 9 * advertising materials, and other materials related to such 10 * distribution and use acknowledge that the software was developed 11 * by Mark Nudleman and the University of California, Berkeley. The 12 * name of Mark Nudleman or the 13 * University may not be used to endorse or promote products derived 14 * from this software without specific prior written permission. 15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 17 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 18 */ 19 20 #ifndef lint 21 static char sccsid[] = "@(#)version.c 5.2 (Berkeley) 07/25/88"; 22 #endif /* not lint */ 23 24 /* 25 * less 26 * Copyright (c) 1984,1985 Mark Nudelman 27 * 28 * This program may be freely used and/or modified, 29 * with the following provisions: 30 * 1. This notice and the above copyright notice must remain intact. 31 * 2. Neither this program, nor any modification of it, 32 * may be sold for profit without written consent of the author. 33 * 34 * ----------------------------------------------------------------- 35 * 36 * This program is a paginator similar to "more", 37 * but allows you to move both forward and backward in the file. 38 * Commands are based on "more" and "vi". 39 * 40 * ----------------------- CHANGES --------------------------------- 41 * 42 * Allowed use on standard input 1/29/84 markn 43 * Added E, N, P commands 2/1/84 markn 44 * Added '=' command, 'stop' signal handling 4/17/84 markn 45 * Added line folding 4/20/84 markn 46 * v2: Fixed '=' command to use BOTTOM_PLUS_ONE, 47 * instead of TOP, added 'p' & 'v' commands 4/27/84 markn 48 * v3: Added -m and -t options, '-' command 5/3/84 markn 49 * v4: Added LESS environment variable 5/3/84 markn 50 * v5: New comments, fixed '-' command slightly 5/3/84 markn 51 * v6: Added -Q, visual bell 5/15/84 markn 52 * v7: Fixed jump_back(n) bug: n should count real 53 * lines, not folded lines. Also allow number 54 * on G command. 5/24/84 markn 55 * v8: Re-do -q and -Q commands 5/30/84 markn 56 * v9: Added "+<cmd>" argument 9/25/84 markn 57 * v10: Fixed bug in -b<n> argument processing 10/10/84 markn 58 * v11: Made error() ring bell if \n not entered. 10/18/84 markn 59 * ----------------------------------------------------------------- 60 * v12: Reorganized signal handling and made 61 * portable to 4.2bsd. 2/13/85 mark 62 * v13: Reword error message for '-' command. 2/16/85 mark 63 * v14: Added -bf and -bp variants of -b. 2/22/85 mark 64 * v15: Miscellaneous changes. 2/25/85 mark 65 * v16: Added -u flag for backspace processing. 3/13/85 mark 66 * v17: Added j and k commands, 67 * changed -t default. 4/13/85 mark 68 * v18: Rewrote signal handling code. 4/20/85 mark 69 * v19: Got rid of "verbose" eq_message(). 5/2/85 mark 70 * Made search() scroll in some cases. 71 * v20: Fixed screen.c ioctls for System V. 5/21/85 mark 72 * v21: Fixed some first_cmd bugs. 5/23/85 mark 73 * v22: Added support for no RECOMP nor REGCMP. 5/24/85 mark 74 * v23: Miscellanous changes and prettying up. 5/25/85 mark 75 * Posted to USENET. 76 * ----------------------------------------------------------------- 77 * v24: Added ti,te terminal init & de-init 6/3/85 Mike Kersenbrock 78 * v25: Added -U flag, standout mode underlining. 6/8/85 mark 79 * v26: Added -M flag. 6/9/85 mark 80 * Use underline termcap (us) if it exists. 81 * v27: Renamed some variables to make unique in 6/15/85 mark 82 * 6 chars. Minor fix to -m. 83 * v28: Fixed right margin bug. 6/28/85 mark 84 * v29: Incorporated M.Rose's changes to signal.c 6/28/85 mark 85 * v30: Fixed stupid bug in argument processing. 6/29/85 mark 86 * v31: Added -p flag, changed repaint algorithm. 7/15/85 mark 87 * Added kludge for magic cookie terminals. 88 * v32: Added cat_file if output not a tty. 7/16/85 mark 89 * v33: Added -e flag and EDITOR. 7/23/85 mark 90 * v34: Added -s flag. 7/26/85 mark 91 * v35: Rewrote option handling; added option.c. 7/27/85 mark 92 * v36: Fixed -e flag to work if not last file. 7/29/85 mark 93 * v37: Added -x flag. 8/10/85 mark 94 * v38: Changed prompting; created prompt.c. 8/19/85 mark 95 * v39: (Not -p) does not initially clear screen. 8/24/85 mark 96 * v40: Added "skipping" indicator in forw(). 8/26/85 mark 97 * Posted to USENET. 98 * ----------------------------------------------------------------- 99 * v41: ONLY_RETURN, control char commands, 9/17/85 mark 100 * faster search, other minor fixes. 101 * v42: Added ++ command line syntax; 9/25/85 mark 102 * ch_fsize for pipes. 103 * v43: Added -h flag, changed prim.c algorithms. 10/15/85 mark 104 * v44: Made END print in all cases of eof; 10/16/85 mark 105 * ignore SIGTTOU after receiving SIGTSTP. 106 * v45: Never print backspaces unless -u. 10/16/85 mark 107 * v46: Backwards scroll in jump_loc. 10/24/85 mark 108 * v47: Fixed bug in edit(): *first_cmd==0 10/30/85 mark 109 * v48: Use TIOCSETN instead of TIOCSETP. 11/16/85 mark 110 * Added marks (m and ' commands). 111 * Posted to USENET. 112 * ----------------------------------------------------------------- 113 * v49: Fixed bug: signal didn't clear mcc. 1/9/86 mark 114 * v50: Added ' (quote) to gomark. 1/15/86 mark 115 * v51: Added + cmd, fixed problem if first_cmd 116 * fails, made g cmd sort of "work" on pipes 117 * even if bof is no longer buffered. 1/16/86 mark 118 * v52: Made short files work better. 1/17/86 mark 119 * v53: Added -P option. 1/20/86 mark 120 * v54: Changed help to use HELPFILE. 1/20/86 mark 121 * v55: Messages work better if not tty output. 1/23/86 mark 122 * v56: Added -l option. 1/24/86 mark 123 * v57: Fixed -l to get confirmation before 124 * overwriting an existing file. 1/31/86 mark 125 * v58: Added filename globbing. 8/28/86 mark 126 * v59: Fixed some bugs with very long filenames. 9/15/86 mark 127 * v60: Incorporated changes from Leith (Casey) 128 * Leedom for boldface and -z option. 9/26/86 mark 129 * v61: Got rid of annoying repaints after ! cmd. 9/26/86 mark 130 * Posted to USENET. 131 * ----------------------------------------------------------------- 132 * v62: Added is_directory(); change -z default to 133 * -1 instead of 24; cat-and-exit if -e and 134 * file is less than a screenful. 12/23/86 mark 135 * v63: Fixed bug in cat-and-exit if > 1 file. 1/8/87 mark 136 * v64: Changed puts/putstr, putc/putchr, 137 * getc/getchr to avoid name conflict with 138 * stdio functions. 1/12/87 mark 139 * v65: Allowed '-' command to change NUMBER 140 * valued options (thanks to Gary Puckering) 1/26/87 mark 141 * v66: Fixed bug: prepaint should use force=1. 2/13/87 mark 142 * v67: Added !! and % expansion to ! command. 2/24/87 mark 143 * v68: Added SIGWINCH and TIOCGWINSZ support; 144 * changed is_directory to bad_file. 145 * (thanks to J. Robert Ward) 2/25/87 mark 146 * v69: Added SIGWIND and WIOCGETD (for Unix PC). 2/25/87 mark 147 * v70: Changed help cmd from 'h' to 'H'; better 148 * error msgs in bad_file, errno_message. 3/13/87 mark 149 * v71: Changed -p to -c, made triple -c/-C 150 * for clear-eol like more's -c. 5/11/87 mark 151 * v72: Added -E, -L, use $SHELL in lsystem(). 6/26/87 mark 152 * (thanks to Steve Spearman) 153 * v73: Allow Examine "#" for previous file. 6/26/87 mark 154 * Posted to USENET 8/25/87. 155 * ----------------------------------------------------------------- 156 * v74: Fix conflict in EOF symbol with stdio.h, 9/18/87 mark 157 * Make os.c more portable to BSD. 158 * v75: Fix problems in get_term (thanks to 9/23/87 mark 159 * Paul Eggert); new backwards scrolling in 160 * jump_loc (thanks to Marion Hakanson). 161 * v76: Added -i flag; allow single "!" to 9/23/87 mark 162 * invoke a shell (thanks to Franco Barber). 163 * v77: Added -n flag and line number support. 9/24/87 mark 164 * v78: Fixed problem with prompts longer than 9/25/87 mark 165 * the screen width. 166 * v79: Added the _ command. 9/29/87 mark 167 * v80: Allow signal to break out of linenum scan. 10/6/87 mark 168 * v81: Allow -b to be changed from within less. 10/6/87 mark 169 * v82: Add cmd_decode to use a table for key 10/7/87 mark 170 * binding (thanks to David Nason). 171 * v83: Allow .less file for user-defined keys. 10/9/87 mark 172 * v84: Fix -e/-E problems (thanks to Felix Lee). 10/11/87 mark 173 * v85: Search now keeps track of line numbers. 10/15/87 mark 174 * v86: Added -B option and autobuf; fixed 10/20/87 mark 175 * "pipe error" bug. 176 * v87: Fix bug re BSD signals while reading file. 3/1/88 mark 177 * v88: Use new format for -P option (thanks to 3/12/88 mark 178 * der Mouse), allow "+-c" without message, 179 * fix bug re BSD hangup. 180 * v89: Turn off line numbers if linenum scan 3/18/88 mark 181 * is interrupted. 182 * v90: Allow -P from within less. 3/30/88 mark 183 * v91: Added tags file support (new -t option) 3/30/88 mark 184 * (thanks to Brian Campbell). 185 * v92: Added -+option syntax. 4/4/88 mark 186 * v93: Add support for slow input (thanks to 4/11/88 mark 187 * Joe Orost & apologies for taking almost 188 * 3 years to get this in!) 189 * v94: Redo reading/signal stuff. 4/11/88 mark 190 * v95: Repaint screen better after signal. 4/20/88 mark 191 * v96: Add /! and ?! commands. 4/21/88 mark 192 * v97: Allow -l/-L from within less. 5/17/88 mark 193 * Eliminate some static arrays (use calloc). 194 */ 195 196 char version[] = "@(#) less version 97"; 197