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Change Log

All relevant changes to the project are documented in this file.

v3.7 - 2023-08-13

Changes

  • New command display-help-toggle, ensures the quick-help text is always shown in the status area, enabled by default
  • New command apply-macro-to-region-lines by Ben Scuron
  • New command end-or-call-last-kbd-macro, used in key bindings
  • Map function keys F1-F4 + F10 to common functions:
    • F1: Toggle quick help
    • F2: Save current buffer
    • F3: Start keyboard macro
    • F4: End keyboard macro, or call latest macro from mark
  • Sync with OpenBSD as of April 21, 2023:
    • Add command set-tab-width to change per-buffer tab width
    • Sync manual changes: grammar, visual improvements
  • Drop support for disabling no-tab-mode when calling configure script. Simplifies code greatly and not needed anymore since it is enabled by default upstream

Fixes

  • Fix Home/End key for builds both with and without curses
  • Fixes bug where the current markline is not reset after being cleared, by Ben Scuron
  • Sync with OpenBSD as of April 21, 2023:
    • Fixes to no-tab-mode. OpenBSD had previously removed this mode, relevant change in this fork: indent next line with spaces
    • Fix buffer overflow when no match is found for a search

v3.6 - 2023-04-10

Changes

  • Add support for exuberant/universal Ctags tags file format
  • Add support for M-, to pop-tag-mark, like GNU Emacs
  • Sync with mg upstream, OpenBSD 7.2, as of April 10 2023
    • Drop trailing whitespace on RET (c-mode)
    • Add zap-to-char and zap-up-to-char, binding the former to M-z
    • Change visit-tags-table to immediately load tags file
  • Add support for --without-docs to skip installation of files to /usr/share/doc/mg, including the manual
  • Install gzipped tutorial in /usr/share/mg/, for built-in help

Fixes

  • Sync with mg upstream, OpenBSD 7.2, as of March 26 2023
    • Fix dobeep_msgs() usage, does not support format strings, this may have caused unexpected crashes for some operations, e.g. goto line that does not exist
    • Fix memleaks and possible crashes in ctags support
    • Fall back to /bin/sh if $SHELL is undefined
    • Use basename of argv[0] instead of hard coding "sh"
  • Fix #17: typos in *quick* help buffer, also replace duplicate undo with mark command instead
  • Fix #18: revert-buffer crash on macOS

v3.5 - 2021-10-17

Changes

  • Add support for Solaris/Illumos based UNIX systems. Tested on OmniOS
  • Add Dockerfile and GitHub integration for container images
  • Sync with mg upstream, OpenBSD 7.0, as of May 12, 2021
    • New replace-regexp function, for scripting
    • New dired function, dired-jump activated with C-x C-j
    • New dired-shell-command function for piping file to a command
    • New mgrc batch mode, mostly intended for regression testing
    • New command line option, -u mgrc, to specify startup mgrc file
    • Clarify markers in list-buffers output, more similar to GNU Emacs

Fixes

  • Fix regression; lost path in status line while trying to open a file.
    Caused by a fix introduced in v3.4 to clear the status line on kill or switch buffer by name. A new fix has been made to handle both cases.
  • Fix #10: replace deprecated signal functions with sigaction()
  • Fix #11: segfault on disabled keybindings, --disable-ctags/cscope
  • Fix various gcc build warnings

v3.4 - 2020-08-23

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

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

v3.3 - 2019-12-11

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, OpenBSD
  • 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

v3.2 - 2018-08-26

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

v3.1 - 2018-07-22

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()

v3.0.2 - 2016-08-28

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.

v3.0.1 - 2016-05-16

Bugfix release.

Fixes

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

v3.0 - 2016-05-15

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