mg

Most important news is the new modeline and support for building and running without Ncurses, or termcap/terminfo!

Packages for Debian 10, and compatible Ubuntu releases, available at https://deb.troglobit.com/

Changes

• Support for building without termcap/terminfo/ncurses. This feature will be welcome for embedded systems, and others who cannot, or do not want to, bundle the complete ncurses
• Support for opening .gz text files, as read-only
• Support for C-h t to access the Mg tutorial
• Support for C-h q to toggle *quick* help buffer
• New default key bindings for cursor movement, from GNU Emacs:
  • C-up backward-paragraph
  • C-down forward-paragraph
  • C-left backward-word, also M-left
  • C-right forward-word, also M-right
  • C-PgUp beginning-of-buffer
  • C-PgDn end-of-buffer
• Sync with OpenBSD:
  • Update all $OpenBSD: id$ strings
  • Fix -Wshadow warnings
  • Fix missing return value checks
• Modeline changes to mimic GNU Emacs
  • Drop Mg:, similar to yur3i/mg/commit/@84ce23b
  • Use space instead of dash - as separator, same as @yur3i
  • Hard code std encoding and UNIX end-of-line mode
  • Show (line,column) and place before buffer modes
  • Upper case for each mode listed
  • New display-time-mode, toggle current time in modeline
• Enable column-number-mode by default
• Add new internal mglog_misc() debug API
• Clear status line after killing/switching buffer by name, fixes lingering prompt after said action
• Rename Debian package: mg -> mg2a, provides mg

Fixes

• Check return value from all fopen() calls in internal log API
• Duplicate definitions of global variables in def.h, found by GCC-10. Patched by Ulrich Mueller of Gentoo, via OpenBSD and Han Boetes
• Avoid NULL deref in regexec when searching for empty lines, from OpenBSD by Hiltjo Posthuma
• Prevent segfault with query-replace-regex replacing ^, from OpenBSD by Mark Williamson
• Avoid running out of memory with query-replace-regex ^, from OpenBSD by Mark Williamson

Changes

• Initial support for scheme-like scripting functionality to ~/.mg, by Mark Lumsden
• Add set-case-replaced to toggle case-preserving replace on or off, by Reyk Flöter
• Complement mg -R with new function: toggle-read-only-all, by Mark Lumsden
• Distribute and install example ~/.mg file in /usr/shared/doc/mg
• Improved internal support for debugging mg, by Mark Lumsden
• Add dired-revert to the dired funmap, by Mark Lumsden
• Display an error message if trying to copy or rename a file to itself, by Mark Lumsden
• Add dired-goto-file, by Mark Lumsden

Fixes

• Fix undo in transpose-paragraph, by Mark Lumsden
• Fix GCC truncation warning in help.c
• Fixes to various GCC 8 compiler warnings, by Joachim Nilsson
• Fix --with-startup=foo and --disable-all configure options
• Fix #2: Update build instructions for Ubuntu 16.04
• Fix switch-to-buffer (C-x b) doesn't cancel properly if C-g is pressed, by Mark Lumsden
• Fix to always display correct file name in minibuffer, by Mark Lumsden
• Fix to allow fns with >0 param receive and process when eval from startup file, by Mark Lumsden

Portability fixes for current and older UNIX and Linux distributions. Extensive testing on many systems: Debian GNU/Linux, Ubuntu, Fedora, CentOS, Alpine Linux, FreeBSD, NetBSD, OpenBSD, DragonFly BSD, Apple macOS >= 10.10, Cygwin, and a few embedded Linux systems.

Changes

• New function: toggle-newline-prompt. From ibara/mg@befd2cf
• Continuous integration support, Travis-CI, for macOS > 10.10
• Support for Cygwin, tested on Windows 10
• Verified support for DragonFly BSD, NetBSD, FreeBSD, and OpenBSD
• Adopt Debian packaging and adapt to this project
• Add example ~/.mg from Han Boetes' portable Mg project

Fixes

• Fix missing futimens() on older UNIX or Linux distributions, in particular macOS < 10.13, by Martin Kühl. From ibara/mg@4a4ac31
• Fix missing libutil.h detection on FreeBSD
• Fix missing LOGIN_NAME_MAX on macOS
• Fix missing st_mtim on macOS and NetBSD
• Fix missing FIONREAD on Cygwin
• Silence compiler warning, uninitialized variable. From ibara/mg@f62f966

The standalone release, with lots of OpenBSD fixes and improvements.

Changes

• Remove libite (-lite) build/runtime requirement. All OpenBSD compat functions now maintained in-tree, used automatically when missing
• Keep current buffer if switch-to-buffer is aborted, from OpenBSD
• Present the default choice before the colon in prompts, from OpenBSD
• Extract compile_mode command status with WEXITSTATUS, from OpenBSD
• Let the Insert key toggle overwrite mode, from OpenBSD
• GNU Emacs compatibility with query-replace & capitilisation, from OpenBSD
• When exiting i-search with ^M, drop mark, like GNU Emacs, from OpenBSD
• Remove theo analyzer from OpenBSD build, archived upstream
• Enable regexp search by default in configure script, now all features are on parity and can be disabled/enabled in the same fashion
• Clarify licensing of project, everything is in the public domain

Fixes

• Fix #1: Enable M-x no-tab-mode, disabled in OpenBSD by default
• Fix line numbering bug, from OpenBSD
• Fix display of overlong lines containing non-ASCII bytes, from OpenBSD
• Fix description of delete-non-matching-lines, from OpenBSD
• Backups saved to wrong directory when running as another user, from OpenBSD
• Fix editing files in a directory without read permission, use relative
  paths if we cannot get the CWD, from OpenBSD
• Fixes to warnings from Coverity Scan (static code analyzer):
  • Insecure data handling in getkeyname()
  • Possible NULL pointer deref(s) in dired.c
  • Fix explicit NULL pointer deref in dired.c
  • Fix unchecked return value in delleadwhite() and indent()
  • Fix explicit NULL pointer deref in excline()
  • Fix many dereference after NULL check in veread()
  • Fix possible memory leak in error handling of veread()

Bugfix release.

Fixes

• Fix segfault when closing *scratch* buffer with C-x k RET having
  issued C-x b RET from a fresh started mg.
• Bring fileio.c up to speed with OpenBSD, r1.102, replacing TMPDIR
  with the standard /tmp directory for temp files.

Bugfix release.

Fixes

• Fix C-a, C-e, C-space, etc. regression when Cscope integration,
  --disable-cscope or --disable-all is selected.

First release based on Mg2a from OpenBSD 5.9. The work on Mg3a, by Bengt Larsson, is not a part of this project. The version number was chosen based on: 2A < 30 < 3A HEX. The OpenBSD Mg is greatly improved
over the original Mg2a, from 1986, but does not have the same feature set as Mg3a.

Changes

• Import mg from OpenBSD 5.9
• Use libite (-lite) to provide missing OpenBSD/NetBSD API's
• Add GNU configure and build system for portability to other systems:
  • Detect existence and correct version of libite (v1.6.0 or later)
  • Detect -ltermcap, -ltinfo, or -lcurses. We only use the termcap
    functionality in Mg, but can link with either of them
  • Detect term.h, we cannot use termcap.h because of cookies
  • Make OpenBSD developed features optional with configure,
    e.g. integrated ctags and cscope support
  • Add --enable-size-optimizations option
  • Add --with-startup=FILE for alternate init file
• Conditionalize OpenBSD specific API's and modules, e.g. the pledge()
  API and the theo.c module ... #ifdef __OpenBSD__
• Add missing M-x version for compatibility with GNU Emacs
• Add -h command line option for a simple usage text
• Change Mg built-in version to use configure script's PACKAGE_STRING
  rather than hardcoded, and rather outdated, Mg 2a
• Add LICENSE file, from licensing info (Public Domain) in README
• Add AUTHORS file, from author listing in README
• Create README.md from text in README and mg.1 with information
  about this project and the motivation for it

Fixes

• Convert from fgetln() to standard POSIX getline()
• Convert old st_mtimespec to POSIX st_mtim
• Add workaround for systems missing TCSASOFT flag to tcsetattr()
• Import SO_NOSIGPIPE patch for OX X from by Han Boetes' Mg porting
  project http://homepage.boetes.org/software/mg/
• Encapsulate private globalwddata in optional grep.c module
• Fix build warnings for missing asprintf() family of C API's
• Integration fixes:
  • fisdir() already exists in libite
  • makedir() is a libite function, rename to make_dir()
• Fix unsafe enabling of non-blocking mode on file descriptor used
  when piping buffer contents (M-|) to an external program.
• Collect forked off children in M-|, missing waitpid()
• Fixes for bugs found by Coverity Scan:
  • Fix file descriptor leaks
  • Add missing NULL pointer checks
  • Missing checks for return value from both internal and C library
    functions. Some simply marked as "don't care"
  • Fix missing initialization of stack variables