X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=ANNOUNCE;h=8bda60e2f074cc2ab7ca9afa82649525f969f0c5;hp=858c7f2fb3cbca9f3cf2023749859fe7560fa1b6;hb=c55d387cebf1cee4757ca2c2ef4fbeae59ee4175;hpb=02f02dcd4464143580e783ae32c822d8eb8cdcbf;ds=sidebyside diff --git a/ANNOUNCE b/ANNOUNCE index 858c7f2f..8bda60e2 100644 --- a/ANNOUNCE +++ b/ANNOUNCE @@ -1,4 +1,4 @@ - Announcing ncurses 6.0 + Announcing ncurses 6.1 Overview @@ -6,8 +6,8 @@ Overview curses in System V Release 4.0 (SVr4), and more. It uses terminfo format, supports pads and color and multiple highlights and forms characters and function-key mapping, and has all the other SVr4-curses - enhancements over BSD curses. SVr4 curses is better known today as - X/Open Curses. + enhancements over BSD curses. SVr4 curses became the basis of X/Open + Curses. In mid-June 1995, the maintainer of 4.4BSD curses declared that he considered 4.4BSD curses obsolete, and encouraged the keepers of unix @@ -38,428 +38,599 @@ Overview Full manual pages are provided for the library and tools. - The ncurses distribution is available via anonymous FTP at the GNU - distribution site + The ncurses distribution is available at ncurses' [9]homepage: - [9]ftp://ftp.gnu.org/gnu/ncurses/ . + [10]ftp://ftp.invisible-island.net/ncurses/ or + [11]https://invisible-mirror.net/archives/ncurses/ . - It is also available at + It is also available via anonymous FTP at the GNU distribution site - [10]ftp://invisible-island.net/ncurses/ . + [12]ftp://ftp.gnu.org/gnu/ncurses/ . Release Notes - These notes are for ncurses 6.0, released August 8, 2015. + These notes are for ncurses 6.1, released January 27, 2018. This release is designed to be source-compatible with ncurses 5.0 - through 5.9; providing a new application binary interface (ABI). - Although the source can still be configured to support the ncurses 5 - ABI, the intent of the release is to provide extensions which are - generally useful, but binary-incompatible with ncurses 5: - * Extend the cchar_t structure to allow more than 16 colors to be - encoded. - * Modify the encoding of mouse state to make room for a 5th mouse - button. That allows one to use ncurses with a wheel mouse with - xterm or similar X terminal emulators. - - There are, of course, numerous other improvements, including - * fixes made based on the Clang and Coverity static analyzers. - * memory leak fixes using Valgrind - - The release notes mention some bug-fixes, but are focused on new - features and improvements to existing features log since ncurses 5.9 + through 6.0; providing extensions to the application binary interface + (ABI). Although the source can still be configured to support the + ncurses 5 ABI, the intent of the release is to provide extensions to + the ncurses 6 ABI: + * improve integration of tput and tset + * provide support for extended numeric capabilities. + + There are, of course, numerous other improvements, listed in this + announcement. + + The release notes also mention some bug-fixes, but are focused on new + features and improvements to existing features since ncurses 6.0 release. - While the intent of the release is to provide a new stable ABI, there - are other development activities which are summarized below. - * The original release plan, e.g., for "5.10" was to improve the - MinGW port. Ultimately that was completed (wide-character support, - mouse, etc), but was deferred to focus on termcap support and - performance issues. Also, pinpointing the problems with Console2 - took a while. - * A review of termcap compatibility in 2011 led to several minor - fixes in the library and improvements to utilities. To do this - properly, a review of the various extent termcap implementations - was needed. - The [11]termcap library checker (tctest) (not part of ncurses) was - one result. A followup review of performance using - [12]ncurses-examples in 2014 led to additional improvements. - * Output buffering provided a further, but worthwhile distraction. A - bug report in 2012 regarding the use of signal handlers in - ncurses) pointed out [13]a problem with the use of unsafe - functions for handling SIGTSTP. Other signals could be addressed - with workarounds; repairing SIGTSTP required a different approach. - The solution required changing internal behavior of the library: - how it handles output buffering. - Now ncurses buffers its own output, independently of the standard - output. A few applications relied upon the library's direct reuse - of the standard output buffering; however that is unspecified - behavior and has never been a recommended practice. Identifying - these applications as well as refining the change to permit - low-level applications to work consistently took time. - * Since the introduction of the experimental support for 256 colors - early in [14]2005 (released in [15]ncurses 5.5), there has been - increased user interest. Almost all packagers continue providing - the ncurses ABI 5 which cannot support 256 colors. - * Symbol versioning, or the lack of it in ncurses, is the main - reason why packagers would be reluctant to add a new ncurses ABI. - This release provides the new ABI along with script-generated - lists of versioned symbols which can be used for both ABI 5 and 6 - (with distinct names to keep the two separate). This took time to - development, as reported in [16]Symbol versioning in ncurses. - Library improvements - Output buffering - - X/Open curses provides more than one initialization function: - * [17]initscr (the simplest) accepts no parameters. - * [18]newterm accepts parameters for the stream input and output - * [19]setupterm (the low-level function) accepts a parameter for the - file descriptor of the output. - - They are documented in X/Open as if initscr calls newterm using stdout - for output stream, and in turn newterm calls setupterm using - fileno(stdout) for the file descriptor. As long as an implementation - acts as if it does this, it conforms. In practice, implementations do - what is implied. This creates a problem: the low-level setupterm - function's file descriptor is unbuffered, while newterm implies - buffered output. X/Open Curses says that all output is done through - the file descriptor, and does not say how the output stream is - actually used. - - Initially, ncurses used the file descriptor (obtained from the output - stream passed to newterm) for changing the terminal modes, and relied - upon the output parameter of newterm for buffered output. Later (to - avoid using unsafe buffered I/O in signal handlers), ncurses was - modified to use the file descriptor (unbuffered output) when cleaning - up on receipt of a signal. Otherwise (when not handling a signal), it - continued to use the buffered output. - - That approach worked reasonably well and as a side effect, using the - same buffered output as an application might use for printf meant that - no flushing was needed when switching between normal- and - screen-modes. - - There were a couple of problems: - * to get good performance, curses (not only ncurses, but SVr4 curses - in general) set an output buffer using setbuf or similar function. - There is no standard (or portable) way to turn that output buffer - off, and revert to line-buffering. The [20]NCURSES_NO_SETBUF - environment variable did make it optional. - * to handle SIGTSTP (the "stop" signal), ncurses relied upon unsafe - functions. That is, due to the complexity of the feature, it - relied upon reusing existing functions which should not have been - called via the signal handler. - - Conveniently, solving the second problem (by making ncurses do its own - output buffering) also fixed the first one. But there were special - cases to resolve: [21]low-level functions such as mvcur, putp, vidattr - explicitly use the standard output. Those functions were reused - internally, and required modification to distinguish whether they were - used by the high-level or low-level interfaces. - - Finally, there may still be a few programs which should be modified to - improve their portability, e.g., adding an - -fflush(stdout); - - when switching from "[22]shell" mode to "[23]program" (curses) mode. - Those are fairly rare because most programmers have learned not to mix - printf and [24]printw. - - Symbol versioning - - This release introduces symbol-versioning to ncurses because without - it, the change of ABI would be less successful. A lengthy discussion - will be presented in [25]Symbol versioning in ncurses. These notes - summarize what has changed, and what can be done with the new release. - - Symbol-versioning allows the developers of a library to mark each - public symbol (both data and functions) with an identifier denoting - the library name and the version for which it was built. By doing - this, users of the library have a way to help ensure that applications - do not accidentally load an incompatible library. In addition, private - symbols can be hidden entirely. - - This release provides sample files for the four principal - configurations of ncurses libraries: ncurses, ncursesw, ncursest and - ncursestw. Each sample is given in two forms: - - ".map" - These list all public symbols, together with version names. - - ".sym" - These list all public symbols, without version names. - - The sample files are generated by scripts which take into account a - few special cases such as [26]tack to omit many of the ncurses private - symbols (beginning with "_nc_"). Here are counts of globals versus - locals: - - Config Symbols Globals Locals "_nc_" - ncurses 976 796 180 332 - ncursesw 1089 905 184 343 - ncursest 979 804 175 358 - ncursestw 1098 914 184 372 - - Although only four sample configurations are presented, each is formed - by merging symbols from several combinations of configure-script - options, taking into account advice from downstream packagers. Because - they are formed by merging, the sample files may list a symbol which - is not in a given package. That is expected. The samples have been - tested and are working with systems (such as Fedora, FreeBSD and - Debian) which fully support this feature. There are other systems - which do not support the feature, and a few (such as Solaris) which - provide incomplete support. - - The version-naming convention used allows these sample files to build - distinct libraries for ABI 5 and 6. Version names consist of - * configuration name, e.g., "NCURSESW" for the wide-character - libraries - * ABI version (if not 5) - * library name for two special cases which have the same interface - across configurations: "TINFO" and "TIC" - * release version - * patch date (for the release version) - - For example, running nm -D on the libraries in the ncurses6 test - package shows these symbol-versions: - -0000000000000000 A NCURSES6_TIC_5.0.19991023 -0000000000000000 A NCURSES6_TIC_5.1.20000708 -0000000000000000 A NCURSES6_TIC_5.5.20051010 -0000000000000000 A NCURSES6_TIC_5.7.20081102 -0000000000000000 A NCURSES6_TIC_5.9.20150530 -0000000000000000 A NCURSES6_TINFO_5.0.19991023 -0000000000000000 A NCURSES6_TINFO_5.1.20000708 -0000000000000000 A NCURSES6_TINFO_5.2.20001021 -0000000000000000 A NCURSES6_TINFO_5.3.20021019 -0000000000000000 A NCURSES6_TINFO_5.4.20040208 -0000000000000000 A NCURSES6_TINFO_5.5.20051010 -0000000000000000 A NCURSES6_TINFO_5.6.20061217 -0000000000000000 A NCURSES6_TINFO_5.7.20081102 -0000000000000000 A NCURSES6_TINFO_5.8.20110226 -0000000000000000 A NCURSES6_TINFO_5.9.20150530 -0000000000000000 A NCURSESW6_5.1.20000708 -0000000000000000 A NCURSESW6_5.3.20021019 -0000000000000000 A NCURSESW6_5.4.20040208 -0000000000000000 A NCURSESW6_5.5.20051010 -0000000000000000 A NCURSESW6_5.6.20061217 -0000000000000000 A NCURSESW6_5.7.20081102 -0000000000000000 A NCURSESW6_5.8.20110226 -0000000000000000 A NCURSESW6_5.9.20150530 - - As a special case, this release (which makes the final change for ABI - 5) is marked with release version 5.9 and patch date 20150530. - - Miscellaneous - - The new release has several improvements for performance and building. - For instance: - * several files in ncurses- and progs-directories were modified to - allow const data used in internal tables to be put by the linker - into the readonly text segment. - * various improvements were made to building the Ada95 binding, both - in simplifying the generated files as well as improving the way it - uses gnatmake - - There are also new features in the libraries: - * added [27]use_tioctl function - * added [28]wgetdelay to retrieve _delay member of WINDOW if it - happens to be opaque, e.g., in the pthread configuration. - * added [29]A_ITALIC extension. - * added form library extension [30]O_DYNAMIC_JUSTIFY option which - can be used to override the different treatment of justification - for static versus dynamic fields . - * rewrote [31]putwin and [32]getwin, making an extended version - which is capable of reading screen-dumps between the wide/normal - ncurses configurations. These are text files, except for a magic - code at the beginning: - -0 string \210\210 Screen-dump (ncurses) - - * several changes to mouse support include: - + added decoder for xterm SGR 1006 mouse mode. - + added experimental support for "%u" format to terminfo. - + improved behavior of wheel-mice for xterm protocol: noting - that there are only button-presses for buttons "4" and "5", - so there is no need to wait to combine events into - double-clicks . - - There are a few new configure options dealing with library - customization: - * add "--enable-ext-putwin" configure option to turn on the extended - putwin/getwin. By default, this is enabled for ABI 6 and disabled - with ABI 5. - * add "--enable-string-hacks" option to control whether strlcat and - strlcpy may be used. Because ncurses already does the requisite - buffer-limit checks, this feature is mainly of interest to quiet - compiler-warnings on a few systems. - * add configure option "--with-tparm-arg" to allow [33]tparm's - parameters to be something more likely to be the same size as a - pointer, e.g., intptr_t (again, the default is set for ABI 6). + New features + + The improved integration of tput and tset made only small changes to + the libraries. However, supporting extended numeric capabilities + required a few changes: + * The TERMINAL structure in is now opaque. Doing that + allowed making the structure larger, to hold the extended numeric + data. + A few applications required changes during development of + ncurses 6.1 because those applications misused the members of that + structure, e.g., directly modifying it rather than using + [13]def_prog_mode. + * Having made TERMINAL opaque (and because none of the library + functions use anything except a pointer to TERMINAL), it was + possible to increase the size of the structure, adding to the end. + Existing applications which were linked to the ncurses 6.0 + high-level (ncurses, ncursesw) and low-level (tinfo, tinfo) + libraries should not require re-linking since the binary interface + did not change, nor did the structure offsets with TERMINAL + change. + A few applications use the inner TERMTYPE structure's offsets to + refer to terminfo capabilities within that structure. Again, those + do not require modification because their offsets within TERMINAL + did not change. + * When configured for wide-characters, i.e., "ncursesw" the TERMINAL + structure is extended. + The new data in TERMINAL holds the same information as TERMTYPE, + but with larger numbers ("int" versus "short"). It is named + TERMTYPE2. + The library uses this structure internally in preference to + TERMTYPE, referring to TERMTYPE only to initialize it for + applications that use the capabilities defined in + * When configured for 8-bit (narrow) characters, the TERMTYPE2 + structure is not used. + * The updated application binary interface is 6.1.20171230 (used for + new [14]versioned symbols), although the interface changes were + developed several months previously. + + The motivation for making this extension came from noticing that + [15]termcap applications could (though not [16]realistically) use + larger numbers than would fit in 16-bits, and the fact that the number + of color pairs for a 256-color xterm could not be expressed in + terminfo (i.e., 32767 versus 65536). Also, a few terminals support + direct-colors, which could use the extension. + + Generally speaking, applications that use internal details of a + library are unsupported. There was exactly one exception for ncurses: + the tack program used the internal details of TERMINAL, because it + provides an ncurses-specific feature for interactively modifying a + terminfo description and writing the updated description to a + text-file. It was possible to not only separate tack from these + [17]internal details of ncurses, but to generalize it so that the + program works with Unix curses (omitting the ncurses-specific + feature). That was released as [18]tack 1.08 in July 2017. + + While making changes to tack to eliminate its dependency upon ncurses + internals, the publicly-visible details of those internals were + reviewed, and some symbols were moved to private header files, while + others were marked explicitly as ncurses internals. Future releases of + ncurses may eliminate some of those symbols (such as those used by + tack 1.07) because they are neither part of the API or the ABI. + + Using the TERMTYPE2 extended numeric capabilities, it is possible to + support both color pair values and color values past 32767. Taking + compatibility into account, developers readily understand that neither + function signatures nor structure offsets change. Also, existing + functions have to operate with the extended numbers. Most of that work + is internal to the library. For the external interfaces, a hybrid + approach was used: + * X/Open Curses defined function prototypes such as wattr_set with + an unused parameter, for "future" use. After 25 years, the future + is here: ncurses uses the parameter to augment color pair values + as described in the [19]manual page. + * Other functions such as those defining color pairs did not have a + corresponding reserved parameter. For those, ncurses defines + extended versions such as init_extended_pair (versus init_pair), + init_extended_color (versus init_color). + + Additionally, to improve performance other changes (and extensions) + are provided in this release: + * Several new functions simplify management of large sets of color + pairs: reset_color_pairs, alloc_pair, find_pair and free_pair. + * New "RGB" extension capability for direct-color support is used to + improve performance of color_content. + * The internal colorpair_t is now a struct, eliminating an internal + 8-bit limit on colors + * Allocation for SCREEN's color-pair table starts small, grows on + demand up to the limit given in the terminal description. + * setcchar and getcchar now treat a negative color-pair as an error. + + Other improvements + + These are new or revised features: + * modify c++/etip.h.in to accommodate deprecation of throw and + throws in c++17 + * add new function unfocus_current_field + * add option to preserve leading whitespace in form fields + * add a macro for is_linetouched and adjust the function's return + value to make it possible for most applications to check for an + error-return. + * add build-time utility report_offsets to help show when the + various configurations of tinfo library are compatible or not. + + These were done to limit or ultimately deprecate features: + * drop two symbols obsoleted in 2004: _nc_check_termtype, and + _nc_resolve_uses + * move _nc_tracebits, _tracedump and _tracemouse to curses.priv.h, + since they are not part of the suggested ABI6. + * mark some structs in form/menu/panel libraries as potentially + opaque without modifying API/ABI. + * ifdef'd header-file definition of mouse_trafo with + NCURSES_NOMACROS + * remove initialization-check for calling napms in the term-driver + configuration; none is needed. + * modify trace to avoid overwriting existing file + + These are improvements to existing features: + * modify make_hash to allow building with address-sanitizer, + assuming that --disable-leaks is configured. + * move SCREEN field for use_tioctl data before the ncursesw fields, + and limit that to the sp-funcs configuration to improve termlib + compatibility + * modify db-iterator: + + ignore zero-length files in db-iterator; these are useful for + instance to suppress $HOME/.terminfo when not wanted. + + modify update_getenv to ensure that environment variables + which are not initially set will be checked later if an + application happens to set them + * modify _nc_outc_wrapper to use the standard output if the screen + was not initialized, rather than returning an error. + * improve checks for low-level terminfo functions when the terminal + has not been initialized. + * modify set_curterm to update ttytype[] data used by longname/p> + * modify _nc_get_screensize to allow for use_env and use_tioctl + state to be per-screen when sp-funcs are configured, better + matching the behavior when using the term-driver configuration. + * remove an early-return from _nc_do_color, which can interfere with + data needed by bkgd when ncurses is configured with extended + colors + * incorporate A_COLOR mask into COLOR_PAIR, in case user application + provides an out-of-range pair number + * modify logic for endwin-state to be able to detect the case where + the screen was never initialized, using that to trigger a flush of + ncurses' buffer for mvcur, e.g., in the sample program dots_mvcur + for the term-driver configuration. + + These are corrections to existing features: + * fixes for writing extended color pairs in putwin. + * modify no-leaks code for lib_cur_term.c to account for the tgetent + cache. + * amend handling of the repeat_char capability in EmitRange to avoid + scope creep: translate the character to the alternate character + set when the alternate character set is enabled, and do not use + repeat_char for characters past 255. + * improve wide-character implementation of myADDNSTR in + frm_driver.c, which was inconsistent with the normal + implementation. + * modify winnstr and winchnstr to return error if the output pointer + is null, as well as adding a null pointer check of the window + pointer for better compatibility with other implementations. + * modify setupterm to save original tty-modes so that erasechar + works as expected. Also modify _nc_setupscreen to avoid redundant + calls to get original tty-modes. + * modify wattr_set and wattr_get to return ERR if win-parameter is + null, as documented. + * correct order of initialization for traces in use_env and + use_tioctl versus first _tracef calls. + * correct parameters for copywin call in _nc_Synchronize_Attributes + * flush the standard output in _nc_flush for the case where SP is + zero, e.g., when called via putp. This fixes a scenario where + "tput flash" did not work after changes in 20130112. + * amend internal use of tputs to consistently use the number of + lines affected, e.g., for insert/delete character operations. + While merging terminfo source early in 1995, several descriptions + used the "*" proportional delay for these operations, prompting a + change in doupdate. + * correct return-value of extended putwin. + * double-width multibyte characters were not counted properly in + winsnstr and wins_nwstr. + * amend fix for _nc_ripoffline from 20091031 to make test/ditto.c + work in threaded configuration. + * modify _nc_viscbuf2 and _tracecchar_t2 to trace wide-characters as + a whole rather than their multibyte equivalents. + * minor fix in wadd_wchnstr to ensure that each cell has nonzero + width. + * move PUTC_INIT calls next to wcrtomb calls, to avoid carry-over of + error status when processing Unicode values which are not mapped. + * add missing assignment in lib_getch.c to make notimeout work Program improvements - Utilities - - Most of the termcap-related changes based on development of [34]tctest - (termcap library checker) are implemented in the tic and infocmp - programs rather than affecting the library. As noted in the - [35]discussion of tctest, ncurses's ability to translate between - terminfo and termcap formats has been improved at different times, but - subject to feedback from "real" termcap users. There are very few of - those. Nowadays, virtually all termcap users are using ncurses (or - NetBSD, with its own terminfo library) and their programs are actually - using terminfo rather than termcap data. - - Still, there are a few. A comment about the translation of the ASCII - NUL character prompted a review: - * Both terminfo and termcap store string capabilities as - NUL-terminated strings. - * In terminfo, a \0 in a terminal description is stored as \200. - * There are no (known) terminals which would behave differently when - sent \0 or \200. - * When translating to terminfo format (or displaying a printable - version of an entry using infocmp), ncurses shows \200 as \0. - * It has done this since 1998 (quoting from the NEWS file): - -[36]980103 -... - + modify _nc_tic_expand() to generate \0 rather than \200. -... - + correct translation of terminfo "^@", to \200, like \0. - - * However, the _nc_tic_expand function (which optionally produces - terminfo or termcap format) did not address this special case for - termcap. Even the later 4.4BSD [37]cgetstr interprets a \0 - literally, ending that string (rather than using the terminfo - improvement). - - As a result of the review, several improvements were made to ncurses - translation to/from termcap format -- and improving the checks made in - tic for consistency of entries. Most of these are not of general - interest, except for two new command-line options for tic and infocmp: - * the "-0" option generates termcap/terminfo source on a single - line. - * the "-K" option provides stricter BSD-compatibility for termcap - output. + While reviewing user feedback, it became apparent that the differences + between [20]reset (an alias for tset) and "tput reset" were confusing: + * one ([21]tset) updated the terminal modes, but used only part of + the terminfo capabilities for initialization, while + * the other ([22]tput) used all of the terminal capabilities while + neglecting the terminal modes. + + On further investigation, it turned out that the differences were + largely an accident due to the way those programs had evolved. + + This release eliminates the unnecessary differences, using the same + approach for tput's init (initialization), reset and clear operations + as the separate [23]reset and [24]clear programs. Doing this does not + change the command-line options; existing scripts are unaffected. + + These are the user-visible changes for the three programs (tput, tset + and clear): + * add the terminal-mode parts of "reset" (aka tset) to the "tput + reset" command, making the two almost the same except for + window-size. + * improve tput's check for being called as "init" or "reset" to + allow for transformed names. + * add "clear" as a possible link/alias to tput. + * amend changes for tput to reset tty modes to "sane" if the program + is run as "reset", like tset. Likewise, ensure that tset sends + either reset- or init-strings. + * add -x option to clear/tput to make the E3 extension optional + * add functionality of "tset -w" to tput, like the "-c" feature this + is not optional in tput. + * add options -T and -V to clear command for compatibility with + tput. + * drop long-obsolete "-n" option from tset. + * modify tset's assignment to TERM in its output to reflect the name + by which the terminal description is found, rather than the + primary name. That was an unnecessary part from the initial + conversion of tset from termcap to terminfo. The termcap library + in 4.3BSD did this to avoid using the short 2-character name + * remove a restriction in tput's support for termcap names which + omitted capabilities normally not shown in termcap translations + * add usage message to clear command + * improve usage messages for tset and tput. Other user-visible improvements and new features include: - * added "-D" option to tic and infocmp, to show the database - locations that it could use. - * added "-s" option to toe, to sort its output. - * extended "-c" and "-n" options of infocmp to allow comparing more - than two entries. - * modified toe's report when "-a" and "-s" options are combined, to - add a column showing which entries belong to a given database. - * modified the clear program to take into account the "E3" extended - capability to clear the terminal's scrollback buffer. + * modify tic/infocmp display of numeric values to use hexadecimal + when they are "close" to a power of two, making the result more + readable. + * add "-W" option to tic/infocmp to force long strings to wrap. + + This is in addition to the "-w" option which attempts to fit + capabilities into a given line-length. + + If "-f" option splits line, do not further split it with + "-W". + + Begin a new line when adding "use=" after a wrapped line. + * add "-q" option to infocmp to suppress the "Reconstructed from" + comment from the header, and a corresponding option to tic to + suppress all comments from the "tic -I" output. + * Sorted options in usage message for infocmp, to make it simpler to + see unused letters. + * Updated usage message for tic, adding "-0" option. + * add infocmp/tic "-Q" option, which allows one to dump the compiled + form of the terminal entry, in hexadecimal or base64: + + A "b64:" prefix in the TERMINFO variable tells the terminfo + reader to use base64 according to RFC-3548 as well as + RFC-4648 url/filename-safe format. + + A "hex:" prefix tells the terminfo reader to accept + hexadecimal data as generated by "infocmp -0qQ1". + + Other less-visible improvements and new features include: + * modify utility headers such as tic.h to make it clearer which are + externals that are used by tack. + * add "reset" to list of programs whose names might change in + manpages due to program-transformation configure options. + * modify "-T" option of clear and tput to call use_tioctl to obtain + the operating system's notion of the screensize if possible. + * add check in tput for init/reset operands to ensure those use a + terminal. + * modify programs clear, tabs, tput and tset to pass the actual tty + file descriptor to setupterm rather than the standard output or + error, making padding work. + * change tset's initialization to allow it to get settings from the + standard input as well as /dev/tty, to be more effective when + output or error are redirected. + * amend check in tput, tabs and clear to allow those to use the + database-only features in cron if a "-T" option gives a suitable + terminal name. + * improve error message from tset/reset when both stderr/stdout are + redirected to a file or pipe. + + Several of the less apparent features deal with translation of + terminfo to termcap (and the reverse), with corresponding checks by + tic: + * modify check in fmt_entry to handle a cancelled reset string. Make + similar fixes in other parts of dump_entry.c and tput.c + * correct read of terminfo entry in which all strings are absent or + explicitly cancelled. Before this fix, the result was that all + were treated as only absent. + * modify infocmp to suppress mixture of absent/cancelled + capabilities that would only show as "NULL, NULL", unless the "-q" + option is used, e.g., to show "-, @" or "@, -". + * correct a warning from tic about keys which are the same, to skip + over missing/cancelled values. + * add check in tic for use of bold, etc., video attributes in the + color capabilities, accounting whether the feature is listed in + ncv. + * add check in tic for unnecessary use of "2" to denote a shifted + special key. + * improve check in tic for delays by also warning about beep/flash + when a delay is not embedded, or if those use the VT100 reverse + video escape without using a delay. + * improve checks in trim_sgr0, comp_parse.c and parse_entry.c, for + cancelled string capabilities. + * add check in tic for some syntax errors of delays, as well as use + of proportional delays for non-line capabilities. + * add check in tic for conflict between ritm, rmso, rmul versus + sgr0. + * add check in _nc_parse_entry for invalid entry name, setting the + name to "invalid" to avoid problems storing entries. + * improve _nc_tparm_analyze, using that to extend the checks made by + tic for reporting inconsistencies between the expected number of + parameters for a capability and the actual. + * remove tic warning about "^?" in string capabilities, which was + marked as an extension; however all Unix implementations support + this and X/Open Curses does not address it. On the other hand, + [25]BSD termcap did not support this feature (until the + [26]mid-1990s). + in _nc_infotocap, added a check to ensure that terminfo "^?" is + not written to termcap. + * modify sscanf calls in _nc_infotocap for patterns "%{number}%+%c" + and "%'char'%+%c" to check that the final character is really "c", + avoiding a case in icl6404 which cannot be converted to termcap. + * in _nc_tic_expand and _nc_infotocap, improved string-length check + when deciding whether to use "^X" or "\xxx" format for control + characters, to make the output of tic/infocmp more predictable. + * limited termcap "%d" width to 2 digits on input, and use "%2" in + preference to "%02" on output. + * correct terminfo/termcap conversion of "%02" and "%03" into "%2" + and "%3"; the result repeated the last character. Examples Along with the library and utilities, many improvements were made to - the [38]ncurses-examples. Some were made to allow building (and - comparison-testing) against NetBSD curses and PDCurses. Both lack some - of the X/Open Curses features, necessitating customization. But this - activity was useful because it showed some remaining performance - issues (which have been resolved in this release). - - These changes were made to verify compatibility or compare performance - of ncurses: - * made workarounds for compiling test-programs with NetBSD curses, - though it lacks some common functions such as [39]use_env. - * added dots_termcap test-program - * added dots_curses test-program, for comparison with the low-level - examples. - * added test_setupterm test-proram to demonstrate normal/error - returns from the setupterm and restartterm functions. - * added "-d", "-e" and "-q" options to the demo_terminfo and - demo_termcap test-programs. - * added "-y" option to demo_termcap and test/demo_terminfo - test-programs to demonstrate behavior with/without extended - capabilities. - * modified demo_termcap and demo_terminfo test-programs to make - their options more directly comparable, and add "-i" option to - specify a terminal description filename to parse for names to - lookup. - * rewrote the tests for [40]mvderwin and test for recursive - [41]mvwin in the movewindow test-program. - - These changes were made to help with the MinGW port: - * added test-screens to the ncurses test-program to show - 256-characters at a time, to help with MinGW port. - * modified the view test-program to load UTF-8 when built with MinGW - by using regular win32 API because the MinGW functions mblen and - mbtowc do not work. - * added "-s" option to the view test-program to allow it to start in - single-step mode, reducing size of trace files when it is used for - debugging MinGW changes. - - These changes were made to verify new extensions in ncurses: - * added [42]form_driver_w entrypoint to wide-character forms - library, as well as form_driver_w test-program. - * modified ncurses test-program's b/B tests to display lines only - for the attributes which a given terminal supports, to make room - for an italics test. - * modified ncurses test-program, adding "-E" and "-T" options to - demonstrate use_env versus use_tioctl. - * modified ncurses test-program's c/C tests to cycle through subsets - of the total number of colors, to better illustrate - 8/16/88/256-colors by providing directly comparable screens. - * modified the ncurses test-program to also show position reports in - 'a' test. - - These changes were made to make the examples more useful: - * added scripts for building dpkg and rpm test-packages - * modified the hanoi test-program to show the minimum number of - moves possible for the given number of tiles. - * modified the knight test-program to show the number of choices - possible for each position in automove option, e.g., to allow user - to follow Warnsdorff's rule to solve the puzzle. + the [27]ncurses-examples. + + These changes were made to demonstrate new extensions in ncurses: + * add demo_new_pair program, to demonstrate [28]alloc_pair, + [29]find_pair and [30]free_pair functions. + This program iterates over the possible color combinations, + allocating or initializing color pairs. For best results, choose + screen-width dividing evenly into the number of colors. e.g., + + 32x64,32x128 256 colors + 24x44,24x88 88 colors + 32x64,24x128 16 colors + + * add extended_color program, like the older color_set program, but + using the extended color functions, with and without the + SP-functions interface. + * add picsmap program to fill in some testing issues not met by + dots, using this as the third example in a comparison of the + [31]ncurses versus slang libraries. + The program can directly read X bitmap and pixmap files, + displaying a picture. It can read other image files using + ImageMagick's convert program to translate the image into text. + For 16-, 88- and 256-color terminal descriptions, picsmap can load + a palette file which tells it which color palette entries to use. + For direct-colors, the terminal descriptions use the RGB extension + capability. - Terminal database + There are other new example programs and a few scripts: + * add dots_xcurses program to illustrate a different approach used + for extended colors which can be contrasted with dots_curses. + * add list_keys program show function keys for one or more terminal + descriptions. It uses ncurses's convention of modifiers for + special keys, based on xterm. + * add padview program, to compare pads with direct updates in the + view program. + * add sp_tinfo program to exercise the SP-functions extension of the + low-level terminfo library. + * add test-programs for termattrs and term_attrs functions. + * add test_sgr program to exercise all combinations of the sgr + capability. + * add tput-colorcube demo script, imitating xterm's 88- and + 256-color scripts using tput. + * add tput-initc script to demonstrate how tput may be used to + initialize a color palette from a data file. + + A variety of improvements were made to existing programs, both new + features as well as options added to make the set of programs more + consistent. + + The ncurses program is the largest; a proportionately large number of + changes were made to it: + * modify a/A screens to make exiting on an escape character depend + on the start of keypad and timeout modes, to allow better testing + of function-keys. + add "t" toggle for notimeout function. + * modify layout of b/B screens to allow for additional annotation on + the right margin; some terminals with partial support did not + display well. + * modify c/C screens to allow for extended color pairs. + add z/Z zoom feature to make extended color pairs easier to test. + modify test-screens to take advantage of wide screens, reducing + the number of lines used for 88- and 256-colors. + * modify "d" edit-color screen to optionally read xterm color + palette directly from terminal, as well as handling KEY_RESIZE and + screen-repainting with control/L and control/R. + * add examples to "F" screen for WACS_D_PLUS and WACS_T_PLUS. + * improve "g" screen, correcting ifdef which made the legend not + reflect changes to keypad- and scroll-modes. Added check for + return-value of putwin. + * make "s" test easier to understand which subtests are available + add a corresponding "S" wide-character overlap test-screen. + * add "v" screen to show baudrate and other values. + + These changes were made to the other examples: + * modify blue program to use Unicode values for card-glyphs when + available, as well as improving the check for CP437 and CP850. + * improve demo_menus program, allowing mouse-click on the + menu-headers to switch the active menu. This requires a new + extension option O_MOUSE_MENU to tell the menu driver to put mouse + events which do not apply to the active menu back into the queue + so that the application can handle the event. + * correct logic in demo_terminfo program for "-f" option + * modify ditto program to allow $XTERM_PROG environment variable to + override "xterm" as the name of the program to run in the threaded + configuration. + * add several options to the "dots" test-programs. + * modify filter program: + + illustrate an alternative to getnstr, that polls for input + while updating a clock on the right margin as well as + responding to window size-changes. + + adapt logic used in [32]dialog [33]"--keep-tite" option for + filter program as the "-a" option. When set, filter attempts + to suppress the alternate screen. + * modify knight program to provide the "slow" solution for small + screens using "R", noting that Warnsdorf's method is easily done + with "a". + * modify the savescreen program to add test patterns that exercise + 88-, 256-, etc., colors. + * add options to test_arrays, for selecting termcap vs terminfo, + etc. + * modify the view program: + + expand tabs using the ncurses library rather than in the + test-program. + + eliminate the "-n" option by simply reading the whole file. + + implement page up/down commands. + + remove the very old SIGWINCH example; just use KEY_RESIZE. + * improve animation in xmas program by adding a time-delay in + blinkit. + * modify several test-programs which call use_default_colors to + consistently do this only if the "-d" option is given. + * modify the install-rule for ncurses-examples to put the data files + in the data directory, e.g., /usr/share/ncurses-examples. + * modify several test programs to use new popup_msgs function, + adapted from the help-screen used in the edit_field program. + * modify test data for xterm palettes to use the newer + color4/color12 values. + * improve the tracemunch script: + + show screenXX pointers and thread identifiers as names. + + chang address-parameters of add_wch, color_content and + pair_content to dummy parameters. - This release provides improvements to tic's "-c" checking option, - which was used for example to - * make sgr in several entries agree with other caps. - * correct padding in some entries where earlier versions had - miscounted the number of octal digits. + Terminal database There are several new terminal descriptions: - * [43]mlterm is now aliased to mlterm3 - * [44]nsterm is now derived from nsterm-256color - * [45]putty-sco - * [46]teken is FreeBSD's "xterm" console. - * [47]terminator - * [48]terminology - * [49]tmux is derived from screen. - * several screen.XXX entries support the respective variations for - 256 colors. - * [50]simpleterm is now 0.5 - * [51]vte is aliased to vte-2012 - * [52]vt520ansi + + dumb-emacs-ansi, dvtm, dvtm-256color, fbterm, iterm2, linux-m1 + minitel entries, putty-noapp, viewdata, and vt100+4bsd + building-block. + + xterm+noalt, xterm+titlestack, xterm+alt1049, xterm+alt+title + building blocks and xterm+direct, xterm+indirect, xterm-direct. + from [34]xterm patch #331. + + several other "-direct" descriptions to address the differences of + other terminal emulators versus xterm-direct. + + There are many changes to existing terminal descriptions. Some were + updates to several descriptions: + * use xterm+sm+1006 in several terminal descriptions which were + validated as supporting the extended mouse feature for their + respective terminal emulators. + * corrected sgr/sgr0 strings in a few cases reported by tic, making + those correspond to the non-sgr settings where they differ, but + otherwise use ECMA-48 consistently. + * add 0.1sec mandatory delay to flash capabilities using the VT100 + reverse-video control + + while others affected specific descriptions. These were retested, to + take into account new/undocumented changes by their developers: + + iterm, minitel, st, viewdata, nsterm + + while these are specific fixes based on user reports, or warnings from + tic: + + [35]ansi building blocks + + + restored rmir/smir in ansi+idc to better match original + ansiterm+idc, add alias ansiterm + + [36]icl6402 + + + corrected missing comma-separator between string capabilities + in icl6402 and m2-nam + + [37]interix + + + updated using tack and SFU with Windows 7 Ultimate. + + used ^? for kdch1 + + [38]linux + + + made linux3.0 entry the default linux entry + + modify linux2.6 entry to improve line-drawing so that the + linux3.0 entry can be used in non-UTF-8 mode + + omitted selection of ISO-8859-1 for G0 in enacs capability + from linux2.6 entry, to avoid conflict with the user-defined + mapping. The reset feature uses ISO-8859-1 in any case. + + modify flash capability for linux and wyse entries to put the + delay between the reverse/normal escapes rather than after + + modify linux-16color to not mask dim, standout or reverse + with the ncv capability + + [39]pccon entries + + + fixed some inconsistencies in the pccon* entries + + add bold to pccon+sgr+acs and pccon-base + + add keys f12-f124 to pccon+keys + + [40]tmux + + + corrected sgr string, which used screen's "standout" code + rather than the standard code. + + add settings corresponding to xterm-keys option to reflect + upcoming change to make that option "on" by default + + uncanceled Ms + + [41]vt100 + + + modify vt100 rs2 string to reset vt52 mode and scrolling + regions + + corrected rs2 string for vt100-nam + + made minor fixes for vt100+4bsd, e.g., delay in sgr for + consistency + + [42]vte + + + moved SGR 24 and 27 from vte-2014 to vte-2012 + + add a few capabilities fixed in recent VTE development + + [43]xterm + + + add rep to xterm-new, available since [44]late 1996. + + modify xterm+256color and xterm+256setaf to use correct + number of color pairs. + + modify rs1 for xterm-16color, xterm-88color and + xterm-256color to reset palette using oc string as in linux + entry. + + add rs1 capability to xterm-256color + + add oc capability to xterm+256color, allowing palette reset + for xterm + + add op to xterm+256setaf + + modify xterm-r5, xterm-r6 and xterm-xf86-v32 to use xterm+kbs + to match [45]xterm #272, reflecting packager's changes + + used ANSI reply for u8 in xterm-new, to reflect vt220-style + responses that could be returned. + + made xterm-pcolor sgr consistent with other capabilities A few entries use extensions (user-defined terminal capabilities): - * E3, used in linux, putty and xterm-basic is tested in the - [53]clear program to erase a terminal's scrollback. - * TS is used in the [54]xterm+sl building block to help deprecate - the misuse of tsl for xterm's title-string. - * XT is used in some terminfo entries to improve usefulness for - other applications than screen, which would like to pretend that - xterm's title is a status-line. - * xm is used in examples [55]xterm-1005 and [56]xterm-1006 to - illustrate a way to make mouse handling more general - - A few terminals support italics and/or dim capabilities. In - particular, screen does not. Documented that, and accommodated the - terminals where this feature works with the A_ITALIC extension. - * konsole, mlterm3 (italics) - * nsterm (dim) - * screen (dim) - * vte (dim, italics) - * xterm (dim, italics) + * add rmxx/smxx ECMA-48 strikeout extension to tmux and xterm-basic + * used RGB capability in new *-direct entries to denote direct-color + feature. Documentation @@ -468,325 +639,273 @@ fflush(stdout); * attempts to improve the description of features which users have found confusing * fills in overlooked descriptions of features which were described - in the [57]NEWS file but treated sketchily in manual pages. - - In addition, the mechanism for producing HTML versions of the - documentation has been improved: - * use an improved version of [58]man2html to generate html manpages. - * regenerated [59]NCURSES-Programming-HOWTO.html to fix some of the - broken html emitted by docbook. + in the [46]NEWS file but treated sketchily in manual pages. + + In particular, + * Since the underlying features for [47]tset, [48]tput, and + [49]clear have been better integrated, the documentation now + includes information on how those tools evolved. + In addition to explaining the improved integration of the tools, + the manual pages made it easier to see how the tools are similar + and how they are different. + * The addch manual page has additional information on + [50]portability and differences from other implementations. + * The discussion of color-pairs in the attributes manual page is + improved in its [51]history section. + * The documentation of the chtype, cchar_t types and the attribute + values which can be stored in those types, in particular the + [52]history and [53]portability sections of the attributes manual + page, has been improved. + * improve discussion of [54]portability in the mouse manual. + * The pad manual page has a section on the [55]origin and + portability of pads. + * Differences between SVr4 and X/Open Curses soft-keys are discussed + in a new section on [56]portability. + * There are updated/improved notes on portability in the + [57]resizeterm and [58]wresize manual pages. + + In addition to providing background information to explain these + features and show how they evolved, there are corrections, + clarifications, etc.: + * add note in the [59]addch manual about line-drawing when it + depends upon UTF-8. + * improve discussion of line-drawing characters in the [60]add_wch + manual. + * explain in [61]clear's manual page that it writes to the standard + output. + * improve description of [62]endwin. + * improve discussion of field validation in the [63]form driver + manual page. + * clarify the use of wint_t vs wchar_t in [64]get_wstr manual page. + * clarify in the [65]getch manual that the keypad mode affects an + application's ability to read KEY_MOUSE codes, but does not affect + KEY_RESIZE. + trim some obsolete/incorrect wording about EINTR from the getch + manual page + improve manual pages for [66]getch and [67]get_wch to point out + that they might return user-defined values which have no + predefined names in + * improve description of the -R option in the [68]infocmp manual + page + * clarify in the [69]resizeterm manual page how KEY_RESIZE is pushed + onto the input stream. + * document return value of [70]use_extended_names + * document differences in [71]ESCDELAY versus AIX's implementation + in the variables manual page. + * The _nc_free_tinfo function is now documented in the + [72]memory-leaks manual page, because it could be used in tack for + memory-leak checking. + * add a note to the [73]tic manual page about -W versus -f options. + * improve terminfo manual description of [74]terminfo syntax. + improve terminfo manual page discussion of [75]control- and + graphics- characters. + improve [76]color-handling section in terminfo manual page + * clarify description in [77]tput manual page regarding support for + termcap names + update [78]tput manual page to reflect changes to manipulate + terminal modes by sharing functions with tset. + * clarify in manual pages that the optional verbose option level of + [79]tic and [80]infocmp is available only when ncurses is + configured for tracing. + * improve manual page description of [81]tset/reset versus + window-size. + * improve description of [82]tgoto parameters + + There are new manual pages: + * [83]user_caps documents the terminfo extensions used by ncurses. + * [84]scr_dump documents the screen-dump format. + + Some of the improvements are more subtle, relating to the way the + information is presented: + * Made minor fixes to manpage NAME/SYNOPSIS sections to consistently + use rule that either all functions which are prototyped in + SYNOPSIS are listed in the NAME section, or the manual-page name + is the sole item listed in the NAME section. The latter is used to + reduce clutter, e.g., for the top-level library manual pages as + well as for certain feature-pages such as [85]SP-funcs and + [86]threading. + * improve manual pages for utilities with respect to POSIX versus + X/Open Curses. + * improve organization of the [87]attributes and [88]color manual + pages. Interesting bug-fixes - * Ada95 binding: - + modify makefile rules to ensure that the PIC option is not - used when building a static library - + make Ada95 build-fix for big-endian architectures such as - sparc. This undoes one of the fixes from [60]20110319, which - added an "Unused" member to representation clauses, replacing - that with pragmas to suppress warnings about unused bits. - * Color and attributes: - + parenthesize parameter of COLOR_PAIR and PAIR_NUMBER in - curses.h in case it happens to be a comma-expression. - + improve [61]20021221 workaround for broken acs, handling a - case where that ACS_xxx character is not in the acsc string - but there is a known wide-character which can be used. - + modify [62]init_pair to accept -1's for color value after - [63]assume_default_colors has been called. - + add a check in [64]start_color to limit color-pairs to 256 - when extended colors are not supported. - * Resizing the screen: - + propagate error-returns from wresize, i.e., the internal - increase_size and decrease_size functions through - [65]resize_term. - + add check for zero/negative dimensions for resizeterm and - resize_term. - + modify resizeterm to always push a KEY_RESIZE onto the fifo, - even if screensize is unchanged. Modify library to push a - KEY_RESIZE if there was a SIGWINCH, even if it does not call - resizeterm). These changes eliminate the case where a - SIGWINCH is received, but ERR is returned from wgetch or - wgetnstr because the screen dimensions did not change. - * Low-level interfaces - + fix an old bug in the termcap emulation; "%i" was ignored in - tparm because the parameters to be incremented were already - on the internal stack. - + change "%l" behavior in tparm to push the string length onto - the stack rather than saving the formatted length into the - output buffer. - + modify name-comparison for tgetstr, etc., to accommodate - legacy applications as well as to improve compatbility with - BSD 4.2 termcap implementations (see note for [66]980725). - * High-level interfaces - + modify internal recursion in wgetch which handles cooked mode - to check if the call to wgetnstr returned an error. This can - happen when both nocbreak and nodelay are set, for instance - (see note for [67]960418). - + add a check in internal function waddch_nosync to ensure that - tab characters are treated as control characters; some broken - locales claim they are printable. - + modify menu library to ensure that a menu's top-row is - adjusted as needed to ensure that the current item is on the - screen - + fix special case where double-width character overwrites a - single- width character in the first column. + * modify toe to not exit if unable to read a terminal description, + e.g., if there is a permission problem. + * correct 20100515 change for weak signals versus sigprocmask + * work around Ada tool-breakage in Debian 9 and later by invoking + gprconfig to specify the C compiler to be used by gnatmake, and + conditionally suppressing Library_Options line for static + libraries. + * There were, as well, several bug-fixes to handle illegal input for + tic. Because those did not correspond to useful terminal + descriptions, most users are unaffected. Configuration changes Major changes - The ncurses 6.0 configure script makes changes to the default value of - several configure options, depending on the --with-abi-version option - (i.e., whether its value is "5" or "6"): - - --enable-const - Feature introduced in [68]970405 supports the use of const - where X/Open Curses should have, but did not. NetBSD curses - does something similar with const. - - --enable-ext-colors - Extends the cchar_t structure to allow more than 16 colors to - be encoded. This applies only to the wide-character - (--enable-widec) configuration. - - --enable-ext-mouse - Modifies the encoding of mouse state to make room for a 5th - mouse button. That allows one to use ncurses with a wheel mouse - with xterm or similar X terminal emulators. - - --enable-ext-putwin - Modifies the file-format written by putwin to use printable - text rather than binary files, allowing getwin to read screen - dumps written by differently-configured ncurses libraries. The - extended getwin can still read binary screen dumps from the - same configuration of ncurses. This does not change the ABI - (the binary interface seen by calling applications). - - --enable-interop - Modifies the FIELDTYPE structure used for the form library to - make it more generic. - - --enable-lp64 - Allows an application to define _LP64 to declare chtype and - mmask_t as simply "unsigned" rather than the configured types - using the --with-chtype and --with-mmask_t options. - - --enable-sp-funcs - Compile-in support for extended functions which accept a SCREEN - pointer, reducing the need for juggling the global SP value - with [69]set_term and [70]delscreen. - - --with-chtype=uint32_t - Makes chtype explicitly a 32-bit unsigned value. - - --with-mmask_t=uint32_t - Makes mmask_t explicitly a 32-bit unsigned value. - - --with-tparm-arg=intptr_t - X/Open Curses declares [71]tparm using long for each of the - parameters aside from the formatting string, presuming that - long and char* are the same size. This configure option uses - intptr_t which provides a better guarantee of the sizes. - - The configure script no longer checks for antique compilers; c89 is - assumed as a minimum. There are a few features from later revisions - which are used when available. The configure script makes checks to - turn on useful warnings from clang, gcc and icc. You should be able to - build ncurses 6.0 with any of the current (or not so current) C - compilers available in 2015. - - The configure script, by the way, makes changes which do not work with - systems whose /bin/sh is non-POSIX. This mainly affects Solaris (the - other vendor unix systems have followed the POSIX guidelines for the - past twenty years). If you must build on Solaris, its [72]xpg4 - binaries suffice, e.g., - - #!/bin/sh - WHAT=`hostname|sed -e 's/\..*//'` - OUT=configure.out - cat >>$OUT <&1 | tee -a $OUT - - Other major changes to the configure script include: - * ABI 6 is now the default, intending that the existing ABI 5 should - build as before using the "--with-abi-version=5" option. - * added --with-extra-suffix option to help with installing - nonconflicting ncurses6 packages, e.g., avoiding header- and - library-conflicts. - NOTE: as a side-effect, this renames - - adacurses-config to adacurses5-config and - adacursesw-config to adacursesw5-config - * the configure script looks for gnatgcc if the Ada95 binding is - built, in preference to the default gcc/cc. The script also - ensures that the Ada95 binding is built with the level of - optimization as the C libraries. - * the configure script captures define's related to -D_XOPEN_SOURCE - from the configure check and adds those to the *-config and *.pc - files, to simplify use for the wide-character libraries. + This release provides a new binary format for terminal descriptions + that use extended numeric capabilities. Applications built with the + wide-character ncursesw library can use these extended numbers. + * This includes utilities such as tic and infocmp, because (as noted + in [89]New features), the feature relies upon an extension to the + low-level tinfo library. + * A few software packagers use a configuration option of ncurses + which allows the low-level tinfo library to be shared between the + high-level ncurses and ncursesw libraries. This new feature was + designed to work in that configuration as well. + + Other applications (i.e., using the 8-bit ncurses library) which read + the extended terminal descriptions see those numeric capabilities set + to the maximum value for a signed 16-bit number. + + Older versions of ncurses' tic accept out-of-range numeric + capabilities, storing those as the maximum value for a signed 16-bit + number. Other implementations of curses (mentioned in the discussion + of [90]picsmap) give zero for these out-of-range capabilities. Configuration options - There are several new (or extended) configure options: - - --disable-db-install - Do not install the terminal database. This is used to omit - features for packages, as done with --without-progs. The option - simplifies building cross-compile support packages. - - --disable-gnat-projects - This option is used for regression testing - - --disable-lib-suffixes - Suppress the "w", "t" or "tw" suffixes which normally would be - added to the library names for the --enable-widec and - --with-pthread options. - - --with-cxx-shared - When --with-shared is set, build libncurses++ as a shared - library. This implicitly relies upon building with gcc/g++, - since other compiler suites may have differences in the way - shared libraries are built. libtool by the way has similar - limitations. - - --with-hashed-db - Extended this configure option to simplify building with - different versions of Berkeley database using FreeBSD ports. - - --with-pc-suffix - If ".pc" files are installed, optionally add a suffix to the - files and corresponding package names to separate unusual - configurations. If no option value is given (or if it is - "none"), no suffix is added. This option is used in the test - package for ncurses6. - - --with-xterm-kbs - Configure xterm's terminfo entries to use either BS (^H, i.e., - ASCII backspace) or DEL (^?, or 127). + These changes provide support for tack 1.08, released in [91]July + 2017: + * add --without-tack configure option to refine --with-progs + configure option. Normally tack is built outside the ncurses tree, + but a few packagers combine it during the build. If term_entry.h + is installed, there is no advantage to in-tree builds. + * adjust configure-script to define HAVE_CURSES_DATA_BOOLNAMES + symbol needed for tack 1.08 when built in-tree. Rather than + relying upon internal "_nc_" functions, tack now uses the boolean, + number and string capability name-arrays provided by ncurses and + SVr4 Unix curses. It still uses term_entry.h for the definitions + of the extended capability arrays. + * add dependency upon ncurses_cfg.h to tic's header-files; any + program using tic-library will have to supply this file. Legacy + tack versions supply this file; ongoing tack development has + dropped the dependency upon tic-library and new releases will not + be affected. + + Other changes to the configure-script and generated files include + * add configure options to disable checks for form, menu and panel + libraries so that ncurses-examples can be built with non-SVr4 + curses implementations. + * add configure option --enable-opaque-curses for ncurses library + and similar options for the other libraries. + * add configure option --disable-wattr-macros for use in cases where + one wants to use the same headers for ncurses5/ncurses6 + development, by suppressing the wattr* macros which differ due to + the introduction of extended colors + * modify configure macro for shared-library rules to use -Wl,-rpath + rather than -rpath to work around a bug in scons + * improve ncurses-examples' configure script to define as needed + NCURSES_WIDECHAR for platforms where _XOPEN_SOURCE_EXTENDED does + not work. Also modified the test program to ensure that if + building with ncurses, that the cchar_t type is checked, since + that is normally (since [92]20111030) ifdef'd depending on this + test. + * modify configure script to handle the case where tic-library is + renamed, but the --with-debug option is used by itself without + normal or shared libraries + * modify editing script which generates resulting.map to work with + the clang configuration on recent FreeBSD, which gives an error on + an empty "local" section. + * improve configure check for setting the WILDCARD_SYMS variable; on + ppc64 the variable is in the Data section rather than Text. + * correct result of configure option --without-fallbacks, which + caused FALLBACK_LIST to be set to "no" + * modify --with-pkg-config-libdir option to make it possible to + install ".pc" files even if pkg-config is not found. Limit this + change, to suppress the actual install if it is not overridden to + a valid directory at install time. + * disallow "no" as a possible value for --with-shlib-version option, + overlooked in cleanup-changes for [93]20000708. Portability - MinGW - - Most of the portability-related work since [73]ncurses 5.9 extended - and improved the MinGW port introduced in [74]ncurses 5.8. - - The MinGW port can be readily cross-compiled: - * modified configure script to allow creating dll's for MinGW when - cross-compiling. - * enforced Windows-style path-separator if cross-compiling, - * added scripts for test-builds of cross-compiled packages for - ncurses6 to MinGW. - * added pc-files to the MinGW cross-compiling test-packages. - * added script for building test-packages of binaries cross-compiled - to MinGW using NSIS. - * added nc_mingw.h to installed headers for MinGW port; this is - needed for cross-compiling [75]ncurses-examples. - * added test-packages for cross-compiling ncurses-examples using the - MinGW test-packages. - - The MinGW-specific Windows driver accounts for several changes: - * wide-character display is made usable by replacing MinGW's - non-working wcrtomb and wctomb functions. - * implemented some display features: [76]beep, [77]flash, - [78]curs_set. - * the driver handles repainting on endwin/refresh combination. - * modified treatment of TERM variable for MinGW port to allow - explicit use of the Windows console driver by checking if $TERM is - set to "#win32console" or an abbreviation of that. - * the Windows driver also matches the special TERM value "unknown" - * the driver now returns characters for special keys, (like ansi.sys - does), when keypad mode is off, rather than returning nothing at - all. - * the driver checks a new environment variable [79]NCURSES_CONSOLE2 - to optionally work around a deficiency in Console2 (and its - descendent ConsoleZ) which hang when an application creates a - console buffer. - - Finally, there are other improvements: - * MinGW is one of the configurations where ncurses installs by - default into /usr - * configuration for cross-compiling uses AC_CHECK_TOOLS in - preference to AC_PATH_PROGS when searching for ncurses*-config, - e.g., in Ada95/configure and test/configure. - * extend Windows support to work with MSYS2; - + this works with a scenario where there is an ANSI-escape - handler such as ansicon running in the console window. - + wrap isatty calls with a macro, provide a corresponding set - of support routines to address differences between MinGW and - MSYS2. - * ensure WINVER is defined in makefiles rather than using headers. - * add check for the gnatprep "-T" option. - * work around a bug introduced by [80]gcc 4.8.1 in MinGW which - breaks "trace" feature. - * add a driver-name method to each of the drivers. - - Other ports - - These changes affect certain platforms (ports): - * the configure script knows how to build shared libraries with - DragonFlyBSD and Interix. - * support for AIX shared libraries is improved, tested with AIX 5.3, - 6.1 and 7.1 with both gcc 4.2.4 and cc: - + the shared-library suffix for AIX 5 and 6 is now ".so" - + the -brtl option is used with AIX 5-7; it is needed to link - with the shared libraries. - * the configure --enable-pc-files option takes into account the - [81]PKG_CONFIG_PATH variable. - * the configure option --with-pkg-config-libdir provides control - over the actual directory into which pc-files are installed. - * the build scripts add explicit -ltinfo, etc., to the generated - ".pc" file when ld option "--as-needed" is used, or when ncurses - and tinfo are installed without using rpath. - * the configure script disallows conflicting options - "--with-termlib" and "--enable-term-driver". - * the check for missing c++ compiler to work when no error is - reported, and no variables set is improved (see note for - [82]20021206). - * the misc/gen_edit.sh script selects a "linux" entry which works - with the current kernel rather than assuming it is always - "linux3.0" - * the test/configure script makes it simpler to override names of - curses-related libraries, to help with linking with pdcurses in - MinGW environment. - * the configure-script/ifdef's allow the BSD OLD_TTY feature to be - suppressed if the type of ospeed is configured using the option - --with-ospeed to not be a short. By default, it is a short for - termcap-compatibility. - * the MKlib_gen.sh script works around a recent change in gcc 5 - (released [83]mid-2015) which essentially emits multiple #line - statements for the same position in a file. - * the configure script works with Minix3.2 (see [84]note on - portability) - * OS/2 redux: - + the configure script supports OS/2 kLIBC. - + the --with-lib-prefix option allows configuring for old/new - flavors of OS/2 EMX. - * improved configure-script checks for _XOPEN_SOURCE: - + the definition works starting with Solaris 10. - + the definition is suppressed for IRIX64, since its header - files have a conflict versus _SGI_SOURCE. + Many of the portability changes are implemented via the configure + script: + * improve configure script's CF_CC_ENV_FLAGS macro to allow for + compiler wrappers such as ccache. This change moves only the + preprocessor, optimization and warning flags to CPPFLAGS and + CFLAGS, leaving the residue in CC. That happens to work for gcc's + various "model" options, but may require tuning for other + compilers. + * modify ncurses-examples' configure script to use pkg-config for + the extra form/menu/panel libraries, to be more consistent with + the handling of the curses/ncurses library. + * add configuration checks to build with [94]NetBSD curses, which + for example lacks [95]use_env. + * change ncurses-examples to use attr_t vs chtype to follow X/Open + documentation more closely since Solaris xpg4-curses uses + different values for WA_xxx vs A_xxx that rely on attr_t being an + unsigned short. Tru64 aka OSF1, HPUX, AIX did as ncurses does, + equating the two sets. + * modify several test programs to reflect that ncurses honors + existing signal handlers in initscr, while other implementations + do not. + * add configure check for openpty to ncurses-examples' configure + script, for ditto. + * improve check for working poll function by using posix_openpt as a + fallback in case there is no valid terminal on the standard input + * modify ncurses-examples' configure script to check for pthread + dependency of ncursest or ncursestw library when building the + ncurses examples, e.g., in case weak symbols are used. + * add checks in ncurses-examples' configure script for some + functions neither in 4.3BSD curses, nor based on X/Open Curses: + + modify a loop limit in firework.c to work around absense of + limit checks in some libraries. + + fill the last row of a window with "?" in firstlast if waddch + does not return ERR on the lower-right corner. + * build-fixes for the Portland Group (PGI) compilers + + accept whitespace in sed expression for generating expanded.c + + modify configure check that g++ compiler warnings are not + used. + + add configure check for -fPIC option needed for shared + libraries. + * modify configure script for clang as used on FreeBSD, to work + around clang's differences in exit codes vs gcc. + * fixes for configure/build using clang on OSX + + do not redefine "inline" in ncurses_cfg.h; this was + originally to solve a problem with gcc/g++, but is aggravated + by clang's misuse of symbols to pretend it is gcc. + + add braces to configure script to prevent unwanted addition + of "-lstdc++" option to the CXXLIBS symbol. + + improve/update test-program used for checking existence of + stdc++ library. + + if $CXXLIBS is set, the linkage test uses that in addition to + $LIBS. + * fixes for OS/2: + + use button instead of kbuf[0] in EMX-specific part of + lib_mouse.c + + support building with libtool on OS/2 + + use stdc++ library with OS/2 kLIBC + + clear configure script's cf_XOPEN_SOURCE for OS/2, to work + with its header files + * add "newer" baudrate symbols to the [96]baudrate function in the + ncurses library as well as to a corresponding table in tset. + * modify ncurses-examples savescreen to work with AIX and HPUX. + * define WIN32_LEAN_AND_MEAN for MinGW port, making builds faster. + * add a configure check for wcwidth versus the ncurses line-drawing + characters, to use in special-casing systems such as Solaris. + Solaris, however, requires a special case that maps Unicode + line-drawing characters into the acsc string for non-Unicode + locales. Solaris also has a misconfigured wcwidth which marks all + of the line drawing characters as double-width. + * string-hacks (non-standard): + + fix configure script to record when strlcat is found on + OpenBSD. + + add --enable-string-hacks option to ncurses-examples' + configure script. + + completed string-hacks for sprintf, etc., including the + ncurses-examples programs. + + make --enable-string-hacks option work with Debian by + checking for the "bsd" library and its associated + "" header. + * workaround for Debian's antique/unmaintained version of mawk: + + see Debian #65617, which was fixed in mawk's upstream + releases in [97]2009. + + related fixes when building link_test. _________________________________________________________________ Features of ncurses @@ -863,10 +982,10 @@ Features of ncurses types even when no terminfo tree or termcap file is accessible (this may be useful for support of screen-oriented programs that must run in single-user mode). - * The [85]tic/[86]captoinfo utility provided with ncurses has the + * The [98]tic/[99]captoinfo utility provided with ncurses has the ability to translate many termcaps from the XENIX, IBM and AT&T extension sets. - * A BSD-like [87]tset utility is provided. + * A BSD-like [100]tset utility is provided. * The ncurses library and utilities will automatically read terminfo entries from $HOME/.terminfo if it exists, and compile to that directory if it exists and the user has no write access to the @@ -881,132 +1000,148 @@ Features of ncurses other entries in the same source file (as in System V) but also to compiled entries in either the system terminfo directory or the user's $HOME/.terminfo directory. - * The table-of-entries utility [88]toe makes it easy for users to + * The table-of-entries utility [101]toe makes it easy for users to see exactly what terminal types are available on the system. * The library meets the XSI requirement that every macro entry point have a corresponding function which may be linked (and will be prototype-checked) if the macro definition is disabled with #undef. - * Extensive documentation is provided (see the [89]Additional - Reading section of the [90]ncurses FAQ for online documentation). + * Extensive documentation is provided (see the [102]Additional + Reading section of the [103]ncurses FAQ for online documentation). Applications using ncurses The ncurses distribution includes a selection of test programs (including a few games). These are available separately as - [91]ncurses-examples + [104]ncurses-examples The ncurses library has been tested with a wide variety of applications including: + aptitude + FrontEnd to Apt, the debian package manager + + [105]https://wiki.debian.org/Aptitude + cdk Curses Development Kit - [92]http://invisible-island.net/cdk/ + [106]https://invisible-island.net/cdk/ ded directory-editor - [93]http://invisible-island.net/ded/ + [107]https://invisible-island.net/ded/ dialog the underlying application used in Slackware's setup, and the basis for similar install/configure applications on many systems. - [94]http://invisible-island.net/dialog/ + [108]https://invisible-island.net/dialog/ lynx the text WWW browser - [95]http://lynx.isc.org/ - - Midnight Commander - file manager - - [96]http://www.midnight-commander.org/ + [109]https://lynx.invisible-island.net/ mutt mail utility - [97]http://www.mutt.org/ + [110]http://www.mutt.org/ ncftp file-transfer utility - [98]http://www.ncftp.com/ + [111]https://www.ncftp.com/ nvi New vi uses ncurses. - [99]https://sites.google.com/a/bostic.com/keithbostic/nvi + [112]https://sites.google.com/a/bostic.com/keithbostic/vi + + ranger + A console file manager with VI key bindings in Python. + + [113]https://ranger.github.io/ tin newsreader, supporting color, MIME - [100]http://www.tin.org/ + [114]http://www.tin.org/ + + vifm + File manager with vi like keybindings + + [115]https://vifm.info/ as well as some that use ncurses for the terminfo support alone: minicom terminal emulator for serial modem connections - [101]http://alioth.debian.org/projects/minicom/ + [116]https://alioth.debian.org/projects/minicom/ mosh a replacement for ssh. - [102]https://mosh.mit.edu/ + [117]https://mosh.mit.edu/ tack terminfo action checker - [103]http://invisible-island.net/ncurses/tack.html + [118]https://invisible-island.net/ncurses/tack.html tmux terminal multiplexor - [104]http://tmux.github.io/ + [119]https://github.com/tmux/tmux/wiki vile vi-like-emacs may be built to use the terminfo, termcap or curses interfaces. - [105]http://invisible-island.net/vile/ + [120]https://invisible-island.net/vile/ and finally, those which use only the termcap interface: emacs text editor - [106]http://www.gnu.org/software/emacs/ + [121]https://www.gnu.org/software/emacs/ + + less + The most commonly used pager (a program that displays text + files). + + [122]http://www.greenwoodsoftware.com/less/ screen terminal multiplexor - [107]http://www.gnu.org/software/screen/ + [123]https://www.gnu.org/software/screen/ vim text editor - [108]http://www.vim.org/ + [124]https://www.vim.org/ Development activities Zeyd Ben-Halim started ncurses from a previous package pcurses, written by Pavel Curtis. Eric S. Raymond continued development. Juergen Pfeifer wrote most of the form and menu libraries. Ongoing - development work is done by [109]Thomas Dickey. Thomas Dickey also + development work is done by [125]Thomas Dickey. Thomas Dickey also acts as the maintainer for the Free Software Foundation, which holds - the [110]copyright on ncurses. + the [126]copyright on ncurses. Contact the current maintainers at - [111]bug-ncurses@gnu.org + [127]bug-ncurses@gnu.org To join the ncurses mailing list, please write email to - [112]bug-ncurses-request@gnu.org + [128]bug-ncurses-request@gnu.org containing the line: @@ -1018,208 +1153,216 @@ Development activities Beta versions of ncurses and patches to the current release are made available at - [113]ftp://invisible-island.net/ncurses/ . + [129]ftp://ftp.invisible-island.net/ncurses/ and + [130]https://invisible-mirror.net/archives/ncurses/ . There is an archive of the mailing list here: - [114]http://lists.gnu.org/archive/html/bug-ncurses (also - [115]https) + [131]http://lists.gnu.org/archive/html/bug-ncurses (also + [132]https) Related resources The release notes make scattered references to these pages, which may be interesting by themselves: - * [116]man2html - * [117]ncurses licensing - * [118]Symbol versioning in ncurses - * [119]The MinGW port of ncurses - * [120]tack - terminfo action checker - * [121]tar versus portability - * [122]tctest - termcap library checker - * [123]Terminal Database + * [133]ncurses licensing + * [134]Symbol versioning in ncurses + * [135]Comments on ncurses versus slang (S-Lang) + * [136]tack - terminfo action checker + * [137]tctest - termcap library checker + * [138]Terminal Database Other resources The distribution provides a newer version of the terminfo-format - terminal description file once maintained by [124]Eric Raymond . + terminal description file once maintained by [139]Eric Raymond . Unlike the older version, the termcap and terminfo data are provided - in the same file, and provides several user-definable extensions - beyond the X/Open specification. + in the same file, which also provides several user-definable + extensions beyond the X/Open specification. You can find lots of information on terminal-related topics not - covered in the terminfo file at [125]Richard Shuford's archive . - - * [126]Overview - * [127]Release Notes - + [128]Library improvements - o [129]Output buffering - o [130]Symbol versioning - o [131]Miscellaneous - + [132]Program improvements - o [133]Utilities - o [134]Examples - + [135]Terminal database - + [136]Documentation - + [137]Interesting bug-fixes - + [138]Configuration changes - o [139]Major changes - o [140]Configuration options - + [141]Portability - o [142]MinGW - o [143]Other ports - * [144]Features of ncurses - * [145]Applications using ncurses - * [146]Development activities - * [147]Related resources - * [148]Other resources + covered in the terminfo file at [140]Richard Shuford's archive . + + * [141]Overview + * [142]Release Notes + + [143]Library improvements + o [144]New features + o [145]Other improvements + + [146]Program improvements + o [147]Utilities + o [148]Examples + + [149]Terminal database + + [150]Documentation + + [151]Interesting bug-fixes + + [152]Configuration changes + o [153]Major changes + o [154]Configuration options + + [155]Portability + * [156]Features of ncurses + * [157]Applications using ncurses + * [158]Development activities + * [159]Related resources + * [160]Other resources References - 1. http://invisible-island.net/ncurses/man/captoinfo.1m.html - 2. http://invisible-island.net/ncurses/man/clear.1.html - 3. http://invisible-island.net/ncurses/man/infocmp.1m.html - 4. http://invisible-island.net/ncurses/man/tabs.1.html - 5. http://invisible-island.net/ncurses/man/tic.1m.html - 6. http://invisible-island.net/ncurses/man/toe.1m.html - 7. http://invisible-island.net/ncurses/man/tput.1.html - 8. http://invisible-island.net/ncurses/man/tset.1.html - 9. ftp://ftp.gnu.org/gnu/ncurses/ - 10. ftp://invisible-island.net/ncurses/ - 11. http://invisible-island.net/ncurses/tctest.html - 12. http://invisible-island.net/ncurses/ncurses-examples.html - 13. http://lists.gnu.org/archive/html/bug-ncurses/2012-07/msg00029.html - 14. http://invisible-island.net/ncurses/NEWS.html#t20050101 - 15. http://invisible-island.net/ncurses/announce-5.5.html - 16. http://invisible-island.net/ncurses/ncurses-mapsyms.html - 17. http://invisible-island.net/ncurses/man/curs_initscr.3x.html#h3-initscr - 18. http://invisible-island.net/ncurses/man/curs_initscr.3x.html#h3-newterm - 19. http://invisible-island.net/ncurses/man/curs_terminfo.3x.html#h3-Initialization - 20. http://invisible-island.net/ncurses/man/ncurses.3x.html#h3-NCURSES_NO_SETBUF - 21. http://invisible-island.net/ncurses/man/curs_terminfo.3x.html - 22. http://invisible-island.net/ncurses/man/curs_kernel.3x.html#h3-reset_prog_mode_-reset_shell_mode - 23. http://invisible-island.net/ncurses/man/curs_kernel.3x.html#h3-reset_prog_mode_-reset_shell_mode - 24. http://invisible-island.net/ncurses/man/curs_printw.3x.html - 25. http://invisible-island.net/ncurses/ncurses-mapsyms.html - 26. http://invisible-island.net/ncurses/tack.html - 27. http://invisible-island.net/ncurses/man/curs_util.3x.html#h3-use_tioctl - 28. http://invisible-island.net/ncurses/man/curs_opaque.3x.html - 29. http://invisible-island.net/ncurses/man/curs_attr.3x.html#h2-PORTABILITY - 30. http://invisible-island.net/ncurses/man/form_field_opts.3x.html - 31. http://invisible-island.net/ncurses/man/curs_util.3x.html#h3-putwin_getwin - 32. http://invisible-island.net/ncurses/man/curs_util.3x.html#h3-putwin_getwin - 33. http://invisible-island.net/ncurses/man/curs_terminfo.3x.html#h3-Formatting-Output - 34. http://invisible-island.net/ncurses/tctest.html - 35. http://invisible-island.net/ncurses/tctest.html#my-better-translation - 36. http://invisible-island.net/ncurses/NEWS.html#t980103 - 37. https://svnweb.freebsd.org/base/head/lib/libc/gen/getcap.c?revision=244092&view=markup#l784 - 38. http://invisible-island.net/ncurses/ncurses-examples.html - 39. http://invisible-island.net/ncurses/man/curs_util.3x.html#h3-use_env - 40. http://invisible-island.net/ncurses/man/curs_window.3x.html#h3-derwin - 41. http://invisible-island.net/ncurses/man/curs_window.3x.html#h3-mvwin - 42. http://invisible-island.net/ncurses/man/form_driver.3x.html#h3-form_driver_w - 43. http://invisible-island.net/ncurses/terminfo.src.html#toc-_M_L_T_E_R_M - 44. http://invisible-island.net/ncurses/terminfo.src.html#tic-nsterm - 45. http://invisible-island.net/ncurses/terminfo.src.html#tic-putty-sco - 46. http://invisible-island.net/ncurses/terminfo.src.html#tic-teken - 47. http://invisible-island.net/ncurses/terminfo.src.html#toc-_T_E_R_M_I_N_A_T_O_R - 48. http://invisible-island.net/ncurses/terminfo.src.html#toc-_T_E_R_M_I_N_O_L_O_G_Y - 49. http://invisible-island.net/ncurses/terminfo.src.html#tic-tmux - 50. http://invisible-island.net/ncurses/terminfo.src.html#toc-_S_I_M_P_L_E_T_E_R_M - 51. http://invisible-island.net/ncurses/terminfo.src.html#tic-vte - 52. 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