Test: ncurses/-demo terminfo/-extra libncurses/-devel/++/w10 6.5+20240427 (TEST)

Test: ncurses/-demo terminfo/-extra libncurses/-devel/++/w10 6.5+20240427 (TEST)

[Cygwin ncurses Maintainer]

The following test packages have been uploaded to the Cygwin distribution:

* ncurses		6.5+20240427
* ncurses-demo		6.5+20240427
* terminfo		6.5+20240427
* terminfo-extra	6.5+20240427
* libncurses-devel	6.5+20240427
* libncurses++w10	6.5+20240427
* libncursesw10		6.5+20240427

The ncurses (new curses) library is an emulation of Sys V R 4
curses, and more. It uses terminfo format, supports pads, color,
multiple highlights, forms characters, function key mapping,
and has all the other SVR4 curses enhancements over BSD curses.

For more information see the project home page:

	https://invisible-island.net/ncurses


Please test these packages as extensively as possible (especially if you
are a Cygwin package maintainer) as libncursesw10 is used in many
libraries including libreadline and utilities including less, vim,
emacs, most other editors, screen, tmux, mail and web clients, and bash.
Package maintainers should install this test release and rerun checks of
as many libraries and packages depending on libncurses{,++}w10 as
possible.
If no issues are reported in the next few weeks, this release may be
promoted to current stable.


As there are multiple components and may be many changes each release,
see below or read /usr/share/doc/ncurses/ANNOUNCE and
/usr/share/doc/ncurses/NEWS after installation:


20240427 6.5 release for upload to ftp.gnu.org
  - update announcement
  - fixes/corrections for manpages (patches by Branden Robinson).
  - fix redefinition of CASTxPTR, for legacy Unix.

20240420
  - improve formatting/style of manpages (patches by Branden Robinson).
  - compiler warning/portability fixes.

20240414
  - build/bug-fix for check-size feature (reports by Sam James, Gabriele
	  Balducci).

20240413
  - improve formatting/style of manpages (patches by Branden Robinson).
  - provide for padding in check-size feature, using new_prescr() to
	  pass interim SCREEN pointer.
  - complete change for opaque options (Gentoo #928973, cf: 20231021).
  - update package /debian/rules and related lintian overrides
  - revise progs.priv.h to provide for NC_ISATTY reuse

20240330
- remove masking of ISIG in cbreak().
- modify test/test_mouse.c to use curses api for raw/noraw.
- improved configure macros from other program development:
  - build-fix for clang on Solaris
  - suppress filename/timestamp in gzip'd manpages

20240323
- modify tput/tset reset feature to avoid 1-second sleep if running in
  a pseudo-terminal.
- modify check-size feature to avoid using it in a pseudoterminal
- improve formatting/style of manpages.
- trim a space after some "-R" options, fixing builds for applications
  built using clang and ncurses on Solaris.

20240309
- modify xgterm to work around line-drawing bug
- use CSI 3J in vte-2017

20240302
- add configure check for MB_LEN_MAX, to provide warning as needed.
- improve formatting/style of manpages.
- fix regression in tput which disallowed hex/octal parameters
- update config.guess, config.sub

20240224
- improve man/curs_mouse.3x style.
- provide for CCHARW_MAX greater than 1
- eliminate use of PATH_MAX in lib_trace.c
- work around misconfiguration of MacPorts gcc13, which exposes invalid
  definition of MB_LEN_MAX in gcc's fallback copy of limits.h.

20240217
- add vt100+noapp, vt100+noapp+pc, xterm+app+pc, xterm+decedit from
  xterm #389
- fix inconsistent description of wmouse_trafo().
- modify wenclose() to handle pads.
- improve manpage discussion of mouseinterval().

20240210
- compiler-warning fixes, while investigating an optimizer bug in
  MacPorts gcc13 13.2.0_4+stdlib_flag which results in only the first
  byte of a multibyte character being printed to the screen.

20240203
- minor changes to tracing and locale-checks.

20240127
- amend change to z39-a.
- use xterm+nopcfkeys, vt52-basic, dec+pp, dec+sl, vt52+arrows,
  hp+pfk+cr, klone+acs, klone+color, klone+sgr, ncr160wy50+pp
  to trim
- NetBSD-related fixes for x68k and wsvt52


ncurses 6.5	April 27, 2024.

This release is designed to be source-compatible with ncurses 5.0
through 6.4; providing extensions to the application binary interface
(ABI).
Although the source can still be configured to support the ncurses 5
ABI, the reason for the release is to reflect improvements to the
ncurses 6 ABI and the supporting utility programs.

There are, of course, numerous other improvements, listed in this
announcement.

The most important bug-fixes/improvements dealt with robustness issues. 
The release notes also mention some other bug-fixes, but are focused on
new features and improvements to existing features since ncurses 6.4
release.

Library improvements

New features

These are new features:

- The low-level terminfo and termcap interfaces are used both by the
  higher-level curses library, as well as by many applications.
  The functions which convert parameterized terminal capability strings
  for output to the terminal (tiparm and tparm) analyze the capability
  string to determine which parameters are strings (i.e., addresses),
  versus numbers (not addresses).
  The library's analysis of a capability string may differ from the
  calling application's design if environment variables are used to
  point to an invalid terminal database.
  This is a longstanding problem with all implementations of terminfo,
  dating from the early 1980s.
  Two new functions address this problem: by providing a function which
  allows the calling application to tell ncurses how many
  string-parameters to expect:

  - tiscan_s helps applications check formatting capabilities that would
    be passed to tiparm_s.
  - tiparm_s provides applications a way to tell ncurses what the
    expected parameters are for a capability.

- The ncurses library supports a compile-time feature (enabled with the
  configure --enable-check-size option) which simplifies initialization
  with terminals which do not negotiate window (screen) size.
  This is done in setupterm, by providing for using ANSI cursor-position
  report (in user6/user7 terminfo capabilities) to obtain the screen
  size if neither environment variables or ioctl is used.
  The ncurses test-program with options "-E -T" demonstrates this
  feature.

- add functions to query tty-flags in SCREEN

This release drops compatibility with obsolete versions of tack, e.g.,
pre-1.08

Other improvements

These are improvements to existing features:

- In addition to the new, safer function tiparm_s, ncurses adds checks
  to make the older tiparm, tparm and tgoto functions safer:

  - the terminfo functions tiparm and tparm ensure that the capability
    string comes from the terminal description which ncurses loads,
    rather than from random data which the application happens to have.
  - the tgoto function disallows capabilities which its analysis shows
    will attempt to use string parameters.
  - ncurses uses internal functions which correspond to tiparm, and
    tgoto which ensure that the capability strings which are passed to
    these functions come from the loaded terminal description.

- improve check in lib_tparm.c, ensuring that a char* fits into a
  TPARM_ARG
- modify _nc_syserr_abort to use _nc_env_access, rather than only
  checking root uid
- improve thread lock in lib_trace.c
- modify flushinp to use file descriptors in SCREEN, rather than from
  TERMINAL, and check if they are for a terminal, like SVr4
- modify mcprint to use file descriptor in SCREEN, for consistency
- modify internal function _nc_read_file_entry to show relevant filename
  in warnings
- improve checks in internal function convert_string for corrupt
  terminfo entry
- review/improve handling of out-of-memory conditions
- limit delays to 30 seconds, i.e., padding delays in terminfo, as well
  as napms and delay_output functions
- fix reallocation loop for vsnprintf in _nc_sprintf_string by copying
  the va_list variable
- modify delscreen to limit the windows which it creates to just those
  associated with the screen
- modify endwin to return an error if it is called again without an
  intervening screen update
- modify wenclose to handle pads
- eliminate use of PATH_MAX in lib_trace.c
- provide for any CCHARW_MAX greater than 1

These are corrections to existing features:
- correct loop termination condition in waddnstr and waddnwstr
- improve parsing in internal function _nc_msec_cost, allowing a single
  decimal point
- amend parameter check for entire string versus specific length in
  winsnstr and wins_nwstr to match Solaris; make similar correction to
  wins_nwstr
- correct internal function wadd_wch_literal when adding a non-spacing
  character to a double-width character
- correct definition of Charable macro for non-wide ncurses library.

Program improvements

Several improvements were made to the utility programs.
Some were done to make the infocmp option "-u" option help refactor the
terminal database.

infocmp

- add limit checks for processing extended capabilities with the "-u"
  option
- correct initial alignment of extended capabilities, so that the "-u"
  option can be used for more than two terminal types
- modify "-u" option to not report cancels for strings which were
  already cancelled in a use'd chunk.
- correct an assignment "-u" for detecting if a boolean is unset in a
  base entry and set in a use'd chunk, i.e., if it was cancelled.

tic

- correct limit-check when dumping tc/use clause via "-I"
- check return value of _nc_save_str, in special case where extended
  capabilities are processed but the terminal description was not
  initialized
- modify check for multiply defined aliases to report problems within
  the current runtime rather than for conflicts with pre-existing
  terminal descriptions.
- disallow using $TERMINFO or $HOME/.terminfo when "-o" option is used

tput and tset

- add "-v" option to tput, to show warnings
- modify reset command to avoid altering clocal if the terminal uses a
  modem
- modify reset feature to avoid 1-second sleep if running in a
  pseudo-terminal

Examples

Along with the library and utilities, improvements were made to the
ncurses-examples:

- modify test_tparm to account for extended capabilities
- corrected mouse mask in test/testcurs.c
- modify test/clip_printw.c to optionally test non-wrapped updates
- modify test/test_mouse.c to use curses api for raw/noraw

There is one new demo/test program:

test/test_endwin.c
This program shows the return-status from endwin with different
combinations of endwin (repeated), initscr, newterm.

Terminal database

There are several new terminal descriptions:

- ansi+apparrows
- contour
- linux+kbs for terminals which imitate xterm's behavior with Linux
- rio, rio-direct
- mostlike
- ms-vt100-16color, winconsole
- vt100+noapp, vt100+noapp+pc, xterm+app+pc, xterm+decedit from xterm #389
- putty+cursor to reflect amending of modified cursor-keys in 2021
- wezterm

There are many changes to existing terminal descriptions.
Some were updates to several descriptions, using the infocmp "-u" option
in a script to determine which building-block entries could be used to
replace multiple capability settings (and trim redundant information).

Other changes include:

- document XF, kxIN and kxOUT
- add note on sun regarding wscons/cmdtool/shelltool
- remove DECCOLM+DECSCLM from foot
- add xterm+focus to foot+base
- add ecma+strikeout to putty
- use CSI 3J in vte-2017
- use oldxterm+sm+1006 in vte-2014
- modify xgterm to work around line-drawing bug
- add xterm focus mode 1004 to xterm+focus as fe/fd capabilities, like vim.
- add xterm+focus to alacritty+common
- add XR/xr, to work with vim, and use RV/rv to denote DA2 and its response
- add XF flag to xterm+focus so that termcap applications can be aware
  of terminals which may support focus in/out
- use xterm+focus in xterm-p370 and tmux
- remove xterm+sm+1006 from tmux
- NetBSD-related fixes for x68k and wsvt25

Documentation

As usual, this release

- improves documentation by describing new features,
- attempts to improve the description of features which users have found
  confusing
- fills in overlooked descriptions of features which were described in
  the NEWS file but treated sketchily in manual pages.

In addition to providing background information to explain these
features and show how they evolved, there are corrections,
clarifications, etc.:

- Corrections:

  - add assignment in CF_MAN_PAGES to fill in value for TERMINFO_DIRS in
    ncurses, terminfo and tic manpages.
  - clarify interaction of -R option versus -C, -I and -r in infocmp
    manpage.
  - correct manpage description of panel_hidden.
  - improve manpage description for addch versus unctrl format used for
    non-printable characters.
  - improve manpages discussing file descriptors in low-level functions.
  - improve description of search rules for terminal descriptions in
    terminfo manpage.
  - modify dist.mk to avoid passing developer's comments in manpages
    into the generated html documentation.
  - modify test-package "ncurses6-doc" to use manpage-aliases, which in
    turn required a change to the configure script to factor in the
    extra-suffix option when deriving alias names.

- New/improved history and portability sections:

  - add information about "ttycap", termcap's forerunner, to tset.1
  - document limitations of tparm, and error-returns in curs_terminfo.3x
  - document limitations of tgoto, and error-returns in curs_termcap.3x

- Other improvements:

  - This release has many changes to improve the formatting and style of
    the manpages.
  - Manpages now use consistent section-naming, page headers and footers
    (including the modification date for each page).
  - Table layout has been revised.

There are no new manual pages (all of the manual page updates are to
existing pages).

Interesting bug-fixes

The changes to tparm, tgoto which improve the design of the low-level
interfaces are interesting, but are not bug-fixes per se.

Configuration changes

Major changes

These are the major changes (aside from introducing tiparm_s):

- use wide-character (ncursesw) by default
- use opaque typedefs by default

However, most of the work on configure scripts was done to reduce
warnings within the configure script:

- intrusive warnings from GNU grep regarding fgrep and egrep
- fatal errors in compile-checks, arising from recent "Modern C" efforts
  by some developers which caused longstanding configure checks to fail.
  After repairing the configure script, none of that activity affected
  ncurses because stricter warnings are used routinely in development.

Other improvements made to configure checks include

- use string-hacks in alloc_entry.c, alloc_type.c and hardscroll.c,
  overlooked due to compiler changes in recent OpenBSD releases
- revise progs.priv.h to provide for NC_ISATTY reuse
- configure check for MB_LEN_MAX provides warning as needed
- trim a space after some "-R" options, fixing builds for applications
  built using clang and ncurses on Solaris
- work around misconfiguration of MacPorts gcc13, which exposes invalid
  definition of MB_LEN_MAX in gcc's fallback copy of limits.h
- modified experimental Windows driver works with xterm mouse protocol

Configuration options

There are a few new configure options:

--disable-setuid-environ
  Compile with environment restriction, so certain environment variables
  are not available when running via a setuid/setgid application.
  These are (for example $TERMINFO) those that allow the search path for
  the terminfo or termcap entry to be customized.
  A setuid/setgid application inherits its environment variables from
  the current user, in contrast to sudo which may limit the environment
  variables that ncurses uses.

--enable-check-size
  Compile-in feature to detect screensize for terminals which do not
  advertise their screensize, e.g., serial terminals.

--with-abi-altered=NUM
  Override the displayed (rather than compiled-in) ABI.
  Only packagers who have created configurations where the ABI differs
  from ncurses should be interested in this option.

--with-strip-program=XXX
  When stripping executables during install, use the specified program
  rather than "strip" overriding program chosen by the install program
  for stripping executables.

These configure options are modified:

--with-pkg-config-libdir[=DIR]
  The optional DIR parameter can now be "auto" to automatically use
  pkg-config's library directory.
  The default is $(libdir).

--with-xterm-kbs[=XXX]
  The default is "auto" which tells the configure script to choose BS or
  DEL according to platform defaults.

Portability

Many of the portability changes are implemented via the configure
script:

- add/use configure check for clock_gettime, to supersede gettimeofday.
- modify configure script check for pkg-config library directory to take
  into account an older version 0.15.0 which used PKG_CONFIG_PATH but
  not PKG_CONFIG_LIBDIR
- allow for MinGW32-/64-bit configurations to use _DEFAULT_SOURCE
- modify CF_XOPEN_SOURCE macro's amend default case to avoid undefining
  _XOPEN_SOURCE if _POSIX_C_SOURCE is defined
- updated configure script macro CF_XOPEN_SOURCE, for uClibc-ng
- modify version-check for gcc/g++, now works for msys2
- build-fixes related to configure-options and/or platform:

  - fix for --enable-fvisibility
  - fix for unusual values of --with-rel-version
  - fix for unusual values of --with-abi-version
  - fix for --disable-tcap-names
  - fix for termcap in nc_access.h

- other configure-script improvements:

  - recent msys2 headers work with _DEFAULT_SOURCE; amend check
  - use $ac_includes_default in most cases where stdlib.h should work
  - use #error consistently vs "make an error"
  - add configure macro for gettimeofday vs inline check

Here are some of the other portability fixes:

- modify configure scripts/makefiles to omit KEY_RESIZE if the
  corresponding SIGWINCH feature is disabled
- increase MB_CUR_MAX to 16, matching glibc's MB_LEN_MAX
- add BSD erase2 to characters handled by tset/reset
- use getauxval when available, to improve setuid/setgid checks
- set dwShareMode in calls to CreateConsoleScreenBuffer
- use CreateFile with "CONIN$", "CONOUT$" rather than GetStdHandle to
  obtain a handle on the actual console, avoiding redirection in the
  MinGW/Win32 configurations
- modify MinGW driver to return KEY_BACKSPACE when an unmodified VK_BACK
  virtual key is entered
- modify MinGW configuration to provide for running in MSYS/MSYS2
  shells, assuming ConPTY support