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  • README.md

  • libX11 - Core X11 protocol client library

    Documentation for this library can be found in the included man pages, and in the Xlib spec from the specs subdirectory, also available at:

    • https://www.x.org/releases/current/doc/libX11/libX11/libX11.html

    • https://www.x.org/releases/current/doc/libX11/libX11/libX11.pdf

    and the O'Reilly Xlib books, which they have made freely available online, though only for older versions of X11:

    • X Series Volume 2: Xlib Reference Manual (1989, covers X11R3) https://www.archive.org/details/xlibretmanver1102nyemiss

    • X Series Volume 2: Xlib Reference Manual, 2nd Edition (1990, covers X11R4) https://www.archive.org/details/xlibrefmanv115ed02nyemiss

    All questions regarding this software should be directed at the Xorg mailing list:

    https://lists.x.org/mailman/listinfo/xorg

    The primary development code repository can be found at:

    https://gitlab.freedesktop.org/xorg/lib/libX11

    Please submit bug reports and requests to merge patches there.

    For patch submission instructions, see:

    https://www.x.org/wiki/Development/Documentation/SubmittingPatches

    Release 1.8.13

    • Ignore XkbMapNotify events that don't belong to the core keyboard (!293)
    • xkb: Fix invalid level names count for key types without level names (!292)
    • xkb: Fix default key types (!292)
    • Drop vestiges of OS/2 support (!291)
    • xkb: fix include of config.h and drop unused DEBUG check (!290)
    • xcb_io: fix build with configure --disable-xthreads (#232, !289)
    • Improve man page formatting (!286)
    • imDefIc: Clear fabricated state on unfocus. (!283)
    • Avoid memory leak in XKeysymToString (!282)

    Release 1.8.12

    • x11.pc: Add URL field (!280)
    • xkb: Bring over fixes from Xserver to shared XKB source files (!279)

    Release 1.8.11

    • Close xcb connection after freeing display structure to avoid XIO error when running synchronized (!264)
    • Don't allocate memory for a zero-sized list of directories when SetFontPath() is called with ndirs == 0 (!266)
    • Fix -Werror=array-bounds build failures with gcc 14.2 when MALLOC_0_RETURNS_NULL is defined (!267)
    • Set data field to 0 when initializing new requests (!268)
    • ximcp: don't leak window if XGetAtomName() fails (!269)
    • ximcp: allow XNArea with OnTheSpot (!270)
    • ximcp: hide internal functions added in 1.8.10 (!271)
    • Handle -Wextra-semi-stmt warnings from clang (!272)
    • xkb: avoid undefined behavior due to left shift overflow (#225, !273)
    • Fix misuse of UCSConvertCase() in XConvertCase() (!274)
    • drop pthread-stubs dependency on Dragonfly, FreeBSD, & NetBSD (!277)

    Release 1.8.10

    • Re-fix XIM input sometimes jumbled (#205, #206, #207, #208, !246)
    • Fix various static analysis errors (!250)
    • Add compose sequences for Arabic hamza (!218), Ezh (!221), and hryvnia currency (!259)
    • Make colormap private interfaces thread safe (#215, !254)
    • Fix deadlock in XRebindKeysym() (!256)
    • Assorted memory handling cleanups (!251, !258)
    • Restore VAX support still in use by NetBSD (!257)

    Release 1.8.9

    • Fix regressions introduced in 1.8.8 (!245, !248) - this includes reverting for now the previous "Fix XIM input sometimes jumbled (#198, !236)"

    Release 1.8.8

    • Fix XIM input sometimes jumbled (#198, !236)
    • Fix _XkbReadGetDeviceInfoReply for nButtons == dev->buttons (!237)
    • Drop ifdefs for platforms that are no longer supported (!242, !243)
    • Assorted memory handling cleanups

    Release 1.8.7

    • Security fixes and hardening in XImage and pixmap handling code (CVE-2023-43786, CVE-2023-43787, !234)
    • Fix buffer allocation in _XkbReadKeySyms() (CVE-2023-43785)
    • Fail XOpenDisplay() if server-provided default visual is invalid (!233)
    • Bring XKB docs in line with actual implementation (!231, !228)
    • Xutil.h: declare XEmptyRegion() and XEqualRegion() as Bool (!225)
    • Assorted updates to en_US.UTF-8 compose keys (!213, !214, !215, !216, !217, !219, !220, !222, !223, !226, !227, !229)

    Release 1.8.6

    • Add bounds checks in InitExt.c (CVE-2023-3138)

    Release 1.8.5

    • autoconf & libtool updates (!187, !188)
    • Restore missing text in XSetScreenSaver man page (#187, !203)
    • Update am_ET.UTF-8 compose keys to use dead-vowel symbols, in coordination with xkeyboard-config 2.39 (!205)
    • Assorted updates to en_US.UTF-8 compose keys (!189, !195, !196, !198, !199, !200, !201, !207, !208, !209)

    Release 1.8.4

    • Revert AddressSanitizer fix from 1.8.3 that caused regression (#176, !180)
    • Add two compose sequences for "capital B with stroke", remove others (!179)
    • Further improved handling of reentering libX11 via X*IfEvent() calls (!176)

    Release 1.8.3

    • Improved handling of reentering libX11 via X*IfEvent() calls (!171, !173)
    • Fix loading of en_US.UTF-8/XLC_LOCALE (#167, !174)
    • Add XFreeThreads() and automatic call from a destructor function when thread-safety-constructor is enabled (!167).
    • Address issues found by UBSan and AddressSanitizer
    • Fix build with older gcc versions (!169)

    Release 1.8.2

    • Allow X*IfEvent() to reenter libX11 to avoid deadlock from unsafe calls when thread-safety-constructor is enabled (!150).
    • Remove Xlib's pthread function stubs - instead use system provided threads functions, including linking against any needed pthread libraries if thread-safety-constructor is enabled (!155, !156).
    • Fix off-by-one error in XKeycodeToKeysym for indexes > 3 (!78).
    • Allow XNSpotLocation with OnTheSpot (!127).
    • Fix Win32 build when -fno-common is in effect (!140).
    • Fix memory leak in XRegisterIMInstantiateCallback (!158).
    • Add compose sequences for the double-struck capitals ℕ ℤ ℚ ℝ ℂ (!144), the Samogitian E with dot above and macron (!147), Unicode minus sign (!163).
    • Change <^> <-> to mean superscript minus instead of macron (!162).
    • Delete compose sequences that mix top-row digits with numpad digits (!139) or mix upper & lower case letters (!144).
    • Delete some unuseful compose sequences meant for Bépo layout (!146).
    • Delete compose sequences using leftcaret & rightcaret keysyms (!163).
    • Remove KOI8-R character set from en_US.UTF-8/XLC_LOCALE (!148).
    • Map sr locales to sr_RS compose files (!161).

    Release 1.8.1

    • Fix --enable-thread-safety-constructor configure option

    Release 1.8

    • Add --enable-thread-safety-constructor configure option (default: enabled) to call XInitThreads() from the library's constructor, thus enabling thread-safety and locking by default. This may expose bugs in clients which did not follow documented rules for calling libX11 functions.
    • Fix Ethopian (am_ET.UTF-8) compose sequences.
    • Remove 8 compose sequences that generated the input symbols.
    • Add compose seuences for abovedot (<period> <space>), diaeresis (<quotedbl> <space>), and ogonek (<semicolon> <space>).

    Release 1.7.5

    • Avoids a segfault when an invalid name is used for opening a display.

    Release 1.7.4

    • Fixes the "Unknown sequence number" error by allowing backward jumps in the sequence number when widening it.
    • Any changes to virtual modifiers get propagated properly.
    • Greek case-conversion tables were updated to Unicode Data 14.0.
    • Compose sequences for ☮ 🄯 ⇐ ⇑ ⇓ were added, being the following: OY, ()), =<, =^, and =v.
    • Hammer-and-sickle can be composed with question mark plus backslash.

    Release 1.7.3

    • Fixes a hanging issue in _XReply() where the replying thread would wait for an event when another thread was already waiting for one.
    • Avoids a crash when the X connection gets broken while closing down.

    Release 1.7.2

    This is a bug fix release, correcting a regression introduced by and improving the checks from the fix for CVE-2021-31535.

    Release 1.7.1

    This is a bug fix release, including a security fix for CVE-2021-31535, nls and documentation corrections.

    • Reject string longer than USHRT_MAX before sending them on the wire
    • Fix out-of-bound access in KeySymToUcs4()
    • nls: allow composing all breved letters also with a lowercase "u"
    • nls: add 'C.utf8' as an alias for 'en_US.UTF-8'
    • Nroff code fixes
    • Comments fixes

    Release 1.7.0

    Version 1.7.0 includes a new API, hence the change from the 1.6 series to 1.7:

    • XSetIOErrorExitHandler which provides a mechanism for applications to recover from I/O error conditions instead of being forced to exit. Thanks to Carlos Garnacho for this.

    This release includes a bunch of bug fixes, some of which have been pending for over three years:

    • A bunch of nls cleanups to remove obsolete entries and clean up formatting of the list. Thanks to Benno Schulenberg for these.

    • Warning fixes and other cleanups across a huge swath of the library. Thanks to Alan Coopersmith for these.

    • Memory allocation bugs, including leaks and use after free in the locale code. Thanks to Krzesimir Nowak, Jacek Caban and Vittorio Zecca for these.

    • Thread safety fixes in the locale code. Thanks to Jacek Caban for these.

    • poll_for_response race condition fix. Thanks to Frediano Ziglio for the bulk of this effort, and to Peter Hutterer for careful review and improvements.

    Version 1.7.0 includes a couple of new locales:

    • ia and ie locales. Thanks to Carmina16 for these.

    There are also numerous compose entries added, including:

    • |^ or ^| for ↑, |v or v| for ↓, ~~ for ≈. Thanks to Antti Savolainen for this.

    • Allowing use of 'v' for caron, in addition to 'c', so things like vC for Č, vc for č. Thanks to Benno Schulenberg for this.

    • Compose sequences LT, lt for '<', and GT, gt for '>' for keyboards where those are difficult to access. Thanks to Jonathan Belsewir for this.