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1.1 root 1: /* Included in MH.6 distribution by permission of Mark Nudelman,
2: 16 September 1985. */
3:
4: /*
5: * less
6: * Copyright (c) 1984,1985 Mark Nudelman
7: *
8: * This program may be freely used and/or modified,
9: * with the following provisions:
10: * 1. This notice and the above copyright notice must remain intact.
11: * 2. Neither this program, nor any modification of it,
12: * may not be sold for profit without written consent of the author.
13: *
14: * -----------------------------------------------------------------
15: *
16: * This program is a paginator similar to "more",
17: * but allows you to move both forward and backward in the file.
18: * Commands are based on "more" and "vi".
19: *
20: * ----------------------- CHANGES ---------------------------------
21: *
22: * Allowed use on standard input 1/29/84 markn
23: * Added E, N, P commands 2/1/84 markn
24: * Added '=' command, 'stop' signal handling 4/17/84 markn
25: * Added line folding 4/20/84 markn
26: * v2: Fixed '=' command to use BOTTOM_PLUS_ONE,
27: * instead of TOP, added 'p' & 'v' commands 4/27/84 markn
28: * v3: Added -m and -t options, '-' command 5/3/84 markn
29: * v4: Added LESS environment variable 5/3/84 markn
30: * v5: New comments, fixed '-' command slightly 5/3/84 markn
31: * v6: Added -Q, visual bell 5/15/84 markn
32: * v7: Fixed jump_back(n) bug: n should count real
33: * lines, not folded lines. Also allow number
34: * on G command. 5/24/84 markn
35: * v8: Re-do -q and -Q commands 5/30/84 markn
36: * v9: Added "+<cmd>" argument 9/25/84 markn
37: * v10: Fixed bug in -b<n> argument processing 10/10/84 markn
38: * v11: Made error() ring bell if \n not entered. 10/18/84 markn
39: * -----------------------------------------------------------------
40: * v12: Reorganized signal handling and made
41: * portable to 4.2bsd. 2/13/85 mark
42: * v13: Reword error message for '-' command. 2/16/85 mark
43: * v14: Added -bf and -bp variants of -b. 2/22/85 mark
44: * v15: Miscellaneous changes. 2/25/85 mark
45: * v16: Added -u flag for backspace processing. 3/13/85 mark
46: * v17: Added j and k commands,
47: * changed -t default. 4/13/85 mark
48: * v18: Rewrote signal handling code. 4/20/85 mark
49: * v19: Got rid of "verbose" eq_message(). 5/2/85 mark
50: * Made search() scroll in some cases.
51: * v20: Fixed screen.c ioctls for System V. 5/21/85 mark
52: * v21: Fixed some first_cmd bugs. 5/23/85 mark
53: * v22: Added support for no RECOMP nor REGCMP. 5/24/85 mark
54: * v23: Miscellanous changes and prettying up. 5/25/85 mark
55: * v24: Added ti,te terminal init & de-init 6/3/85 Mike Kersenbrock
56: * v25: Added -U flag, standout mode underlining. 6/8/85 mark
57: * v26: Added -M flag. 6/9/85 mark
58: * Use underline termcap (us) if it exists.
59: * v27: Renamed some variables to make unique in 6/15/85 mark
60: * 6 chars. Minor fix to -m.
61: * v28: Fixed right margin bug. 6/28/85 mark
62: * v29: Incorporated M.Rose's changes to signal.c 6/28/85 mark
63: * v30: Fixed stupid bug in argument processing. 6/29/85 mark
64: * v31: Added -p flag, changed repaint algorithm. 7/15/85 mark
65: * Added kludge for magic cookie terminals.
66: * v32: Added cat_file if output not a tty. 7/16/85 mark
67: * v33: Added -e flag and EDITOR. 7/23/85 mark
68: * v34: Added -s flag. 7/26/85 mark
69: * v35: Rewrote option handling; added option.c. 7/27/85 mark
70: * v36: Fixed -e flag to work if not last file. 7/29/85 mark
71: * v37: Added -x flag. 8/10/85 mark
72: * v38: Changed prompting; created prompt.c. 8/19/85 mark
73: * v39: (Not -p) does not initially clear screen. 8/24/85 mark
74: * v40: Added "skipping" indicator in forw(). 8/26/85 mark
75: * v41: ONLY_RETURN, control char commands, 9/17/85 mark
76: * faster search, other minor fixes.
77: * v42: Added ++ command line syntax; 9/25/85 mark
78: * ch_fsize for pipes.
79: * v43: Added -h flag, changed prim.c algorithms. 10/15/85 mark
80: * v44: Made END print in all cases of eof; 10/16/85 mark
81: * ignore SIGTTOU after receiving SIGTSTP.
82: * v45: Never print backspaces unless -u. 10/16/85 mark
83: * v46: Backwards scroll in jump_loc. 10/24/85 mark
84: * v47: Fixed bug in edit(): *first_cmd==0 10/30/85 mark
85: * v48: Use TIOCSETN instead of TIOCSETP. 11/16/85 mark
86: * Added marks (m and ' commands).
87: #ifdef NRTC
88: * v48a: QUIT handling 9/11/85 mtr
89: * v48b: carat_char a macro 9/11/85 mtr
90: #endif NRTC
91: * -----------------------------------------------------------------
92: */
93:
94: #ifndef NRTC
95: char version[] = "@(#) less version 48";
96: #else NRTC
97: char version[] = "@(#) less version 48b";
98: #endif NRTC
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