1************************************************************************** 2************************************************************************** 3** ** 4** The FreeBSD Project has chosen to redistribute and modify Less under ** 5** the 'Less License' (as described in the 'LICENSE' file). ** 6** ** 7************************************************************************** 8************************************************************************** 9 10 Less, version 581.2 11 12 This is the distribution of less, version 581.2, released 28 Apr 2021. 13 This program is part of the GNU project (http://www.gnu.org). 14 15 This program is free software. You may redistribute it and/or 16 modify it under the terms of either: 17 18 1. The GNU General Public License, as published by the Free 19 Software Foundation; either version 3, or (at your option) any 20 later version. A copy of this license is in the file COPYING. 21 or 22 2. The Less License, in the file LICENSE. 23 24 Please report any problems at https://github.com/gwsw/less/issues. 25 See https://greenwoodsoftware.com/less for the latest info. 26 Source repository is at https://github.com/gwsw/less.git. 27 28========================================================================= 29 30The formatted manual page is in less.man. 31The manual page nroff source is in less.nro. 32Major changes made since the last posted version are in NEWS. 33 34======================================================================= 35INSTALLATION (Unix & Linux systems only): 36 371. Move the distributed source to its own directory and unpack it, 38 if you have not already done so. 39 402. If you are building from a clone of a git repository, 41 type "make -f Makefile.aut". 42 If you are building from a numbered release package (a tar or 43 zip file with a name like less-999.tar.gz or less-999.zip downloaded 44 from greenwoodsoftware.com, not from github), you should skip this step. 45 463. Type "sh configure". 47 This will generate a Makefile and a defines.h. 48 Warning: if you have a GNU sed, make sure it is version 2.05 or later. 49 50 The file INSTALL describes the usage of the configure program in 51 general. In addition, these options to configure are supported: 52 53 --with-editor=program 54 Specifies the default editor program used by the "v" command. 55 The default is "vi". 56 57 --with-regex=lib 58 Specifies the regular expression library used by less for pattern 59 matching. The default is "auto", which means the configure program 60 finds a regular expression library automatically. Other values are: 61 gnu Use the GNU regex library. 62 pcre Use the PCRE library. 63 pcre2 Use the PCRE2 library. 64 posix Use the POSIX-compatible regcomp. 65 regcmp Use the regcmp library. 66 re_comp Use the re_comp library. 67 regcomp Use the V8-compatible regcomp. 68 regcomp-local Use Henry Spencer's V8-compatible regcomp 69 (source is supplied with less). 70 none No regular expressions, only simple string matching. 71 72 --with-secure 73 Builds a "secure" version of less, with some features disabled 74 to prevent users from viewing other files, accessing shell 75 commands, etc. 76 77 784. It is a good idea to look over the generated Makefile and defines.h 79 and make sure they look ok. If you know of any peculiarities of 80 your system that configure might not have detected, you may fix the 81 Makefile now. Take particular notice of the list of "terminal" 82 libraries in the LIBS definition in the Makefile; these may need 83 to be edited. The terminal libraries will be some subset of 84 -lncurses -lcurses -ltermcap -ltermlib 85 86 If you wish, you may edit defines.h to remove some optional features. 87 If you choose not to include some features in your version, you may 88 wish to edit the manual page "less.nro" and the help page "less.hlp" 89 to remove the descriptions of the features which you are removing. 90 If you edit less.hlp, you should run "make -f Makefile.aut help.c". 91 925. Type "make" and watch the fun. 93 946. If the make succeeds, it will generate the programs "less", 95 "lesskey" and "lessecho" in your current directory. Test the 96 generated programs. 97 987. When satisfied that it works, if you wish to install it 99 in a public place, type "make install". 100 101 The default install destinations are: 102 Executables (less, lesskey, lessecho) in /usr/local/bin 103 Documentation (less.nro, lesskey.nro) in /usr/local/man/man1 104 If you want to install any of these files elsewhere, define 105 bindir and/or mandir to the appropriate directories. 106 107 108Note to hackers: comments noting possible improvements are enclosed 109in double curly brackets {{ like this }}. 110 111(Note that the above note was originally written at a time when 112"hackers" most commonly meant "enthusiastic and dedicated computer 113programmers", not "persons who attempt to circumvent computer security".) 114 115 116 117======================================================================= 118INSTALLATION (MS-DOS systems only, 119 with Microsoft C, Borland C, or DJGPP) 120 1211. Move the distributed source to its own directory. 122 Depending on your compiler, you may need to convert the source 123 to have CR-LF rather than LF as line terminators. 124 1252. If you are using Microsoft C, rename MAKEFILE.DSU to MAKEFILE. 126 If you are using Borland C, rename MAKEFILE.DSB to MAKEFILE. 127 If you are using DJGPP, rename MAKEFILE.DSG to MAKEFILE. 128 1293. Look at MAKEFILE to make sure that the definitions for CC and LIBDIR 130 are correct. CC should be the name of your C compiler and 131 LIBDIR should be the directory where the C libraries reside (for 132 Microsoft C only). If these definitions need to be changed, you can 133 either modify the definitions directly in MAKEFILE, or set your 134 environment variables CC and/or LIBDIR to override the definitions 135 in MAKEFILE. 136 1374. If you wish, you may edit DEFINES.DS to remove some optional features. 138 If you choose not to include some features in your version, you may 139 wish to edit the manual page LESS.MAN and the help page HELP.C 140 to remove the descriptions of the features which you are removing. 141 1425. Run your "make" program and watch the fun. 143 If your "make" requires a flag to import environment variables, 144 you should use that flag. 145 If your compiler runs out of memory, try running "make -n >cmds.bat" 146 and then run cmds.bat. 147 1486. If the make succeeds, it will generate the programs "LESS.EXE" and 149 "LESSKEY.EXE" in your current directory. Test the generated programs. 150 1517. When satisfied that it works, you may wish to install LESS.EXE and 152 LESSKEY.EXE in a directory which is included in your PATH. 153 154 155 156======================================================================= 157INSTALLATION (Windows-95, Windows-98 and Windows-NT systems only, 158 with Borland C or Microsoft Visual C++) 159 1601. Move the distributed source to its own directory. 161 1622. If you are using Borland C, rename Makefile.wnb to Makefile. 163 If you are using Microsoft Visual C++, rename Makefile.wnm to Makefile. 164 1653. Check the Makefile to make sure the definitions look ok. 166 1674. If you wish, you may edit defines.wn to remove some optional features. 168 If you choose not to include some features in your version, you may 169 wish to edit the manual page less.man and the help page help.c 170 to remove the descriptions of the features which you are removing. 171 1725. Type "make" and watch the fun. 173 1746. If the make succeeds, it will generate the programs "less.exe" and 175 "lesskey.exe" in your current directory. Test the generated programs. 176 1777. When satisfied that it works, if you wish to install it 178 in a public place, type "make install". 179 See step 6 of the Unix installation instructions for details 180 on how to change the default installation directories. 181 182 183 184======================================================================= 185INSTALLATION (OS/2 systems only, 186 with EMX C) 187 1881. Move the distributed source to its own directory. 189 1902. Rename Makefile.o2e to Makefile. 191 1923. Check the Makefile to make sure the definitions look ok. 193 1944. If you wish, you may edit defines.o2 to remove some optional features. 195 If you choose not to include some features in your version, you may 196 wish to edit the manual page less.man and the help page help.c 197 to remove the descriptions of the features which you are removing. 198 1995. Type "make" and watch the fun. 200 2016. If the make succeeds, it will generate the programs "less.exe" and 202 "lesskey.exe" in your current directory. Test the generated programs. 203 2047. Make sure you have the emx runtime installed. You need the emx DLLs 205 emx.dll and emxlibcs.dll and also the termcap database, termcap.dat. 206 Make sure you have termcap.dat either in the default location or 207 somewhere in a directory listed in the PATH or INIT environment 208 variables. 209 2108. When satisfied that it works, you may wish to install less.exe, 211 lesskey.exe and scrsize.exe in a directory which is included in 212 your PATH. scrsize.exe is required only if you use a terminal 213 emulator such as xterm or rxvt. 214 215 216 217======================================================================= 218INSTALLATION (OS-9 systems only, 219 with Microware C or Ultra C) 220 2211. Move the distributed source to its own directory. 222 2232. If you are using Microware C, rename Makefile.o9c to Makefile. 224 If you are using Ultra C, rename Makefile.o9u to Makefile. 225 2263. Check the Makefile to make sure the definitions look ok. 227 2284. If you wish, you may edit defines.o9 to remove some optional features. 229 If you choose not to include some features in your version, you may 230 wish to edit the manual page less.man and the help page help.c 231 to remove the descriptions of the features which you are removing. 232 2335. Type "dmake" and watch the fun. 234 The standard OS-9 "make" will probably not work. If you don't 235 have dmake, you can get a copy from os9archive.rtsi.com. 236 2376. If the make succeeds, it will generate the programs "less" and 238 "lesskey" in your current directory. Test the generated programs. 239 2407. When satisfied that it works, if you wish to install it 241 in a public place, type "dmake install". 242 See step 6 of the Unix installation instructions for details 243 on how to change the default installation directories. 244 245======================================================================= 246ACKNOWLEDGMENTS: 247 Some versions of the less distribution are packaged using 248 Info-ZIP's compression utility. 249 Info-ZIP's software is free and can be obtained as source 250 code or executables from various anonymous-ftp sites, 251 including ftp.uu.net:/pub/archiving/zip. 252