Date: Thu, 1 Feb 2024 12:37:35 +0100
To: cygwin@cygwin.com
Subject: [ANNOUNCEMENT] cygwin 3.5.0-1
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From: Corinna Vinschen via Cygwin <cygwin@cygwin.com>
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I'm happy to announce update of the first Cygwin 3.5 release

==========================================================================
                   IMPORTANT DEPRECATION NOTES
==========================================================================

- Cygwin 3.4.10 was the LAST major version supporting

  - Windows 7 / 8
  - Windows Server 2008 R2 / 2012

- Cygwin 3.5.0 runs on

  - Windows 8.1 / 10 / 11
  - Windows Server 2012 R2 / 2016 / 2019 / 2022
  - and (hopefully) all upcoming releases of Windows.

==========================================================================

Here's what's new and changed compared to Cygwin 3.4.10:


What's new:
-----------

- Drop support for Windows 7, Windows 8, Server 2008 R2 and Server 2012.

- Console devices (/dev/consN) are now accessible by processes attached
  to other consoles or ptys. Thanks to this new feature, GNU screen and
  tmux now work in the console.

- newgrp(1) tool.

- cygcheck has new options searching for available packages in the
  cygwin distro, as well as getting extended info on available and
  installed packages.

- fnmatch(3) and glob(3) now support named character classes, equivalence
  class expressions, and collating symbols in the search pattern, i.e.,
  [:alnum:], [=a=], [.aa.].

- Introduce /dev/disk directory with various by-* subdirectories which
  provide symlinks to disk and partition raw devices:
  by-drive/DRIVE_LETTER ->  ../../sdXN
  by-label/VOLUME_LABEL ->  ../../sdXN
  by-id/BUSTYPE-[VENDOR_]PRODUCT_[SERIAL|0xHASH][-partN] -> ../../sdX[N]
  by-partuuid/MBR_SERIAL-OFFSET -> ../../sdXN
  by-partuuid/GPT_GUID -> ../../sdXN
  by-uuid/VOLUME_SERIAL -> ../../sdXN
  by-voluuid/MBR_SERIAL-OFFSET -> ../../sdXN
  by-voluuid/VOLUME_GUID -> ../../sdXN
  The subdirectories by-drive and by-voluuid are Cygwin specific.

- Introduce /proc/codesets and /proc/locales with information on
  supported codesets and locales for all interested parties.  Locale(1)
  opens these files and uses the info for printing locale info like any
  other process could do.

- Add support for GB18030 codeset.

- Add support for lseek flags SEEK_DATA and SEEK_HOLE, a GNU extension.

- New API calls: posix_spawn_file_actions_addchdir_np,
  posix_spawn_file_actions_addfchdir_np.

- New API calls: c8rtomb, c16rtomb, c32rtomb, mbrtoc8, mbrtoc16, mbrtoc32.

- New API call: close_range (available on FreeBSD and Linux).

- New API call: fallocate (Linux-specific).

- Implement OSS-based sound mixer device (/dev/mixer).


What changed:
-------------

- posix_spawnp no longer falls back to starting the shell for unrecognized
  files as execvp.  For the reasoning, see
  https://www.austingroupbugs.net/view.php?id=1674

- FIFOs now also work on NFS filesystems.

- Enable automatic sparsifying of files on SSDs, independent of the
  "sparse" mount mode.

- When RLIMIT_CORE is more than 1MB, a core dump file which can be loaded by gdb
  is now written on a fatal error. Otherwise, if it's greater than zero, a text
  format .stackdump file is written, as previously.

- The default RLIMIT_CORE is now 0, disabling the generation of core dump or
  stackdump files.


Fixes:
------

- Fix arc4random reseeding after fork(2).
  Addresses: https://cygwin.com/pipermail/cygwin/2024-January/255245.html
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