v2.6.1

• Fix: Set the core dumped flag correctly in linux/proc on
  CLD_DUMPED.

• Fix: Don't attempt to cleanup memory on fork as free() is not
  fork safe. We still close open kqueue FDs on fork, and liberal
  use of CLOEXEC should clean up any lingering filter FDs though
  we may want to close these explicitly in future too.

• Fix: Double unlock in posix/proc.c

• Fix: Potential deadlock on kqueue initialisation failure.

• Fix: Building for MSVC (Patch by @Jan200101)

• Fix: Sprinkle CLOEXEC around various places in the Linux and
  POSIX platforms to stop us leaking file descriptors on exec.

• Add EVFILT_LIBKQUEUE/NOTE_THREAD_SAFE. When set to 0, the
  global mutex is not locked on kqueue lookup. The application
  must guarantee that kqueues must not be destroyed by a different
  thread to the one that created them.

v2.6.0

• Fix: posix/proc don't allow users of this filter to progress
  until the proc waiter thread has completed initialisation.

• Fix: Address multiple thread synchronisation issues by using a
  single global mutex to synchronise the kqueue list and kqueue
  file descriptor map, and per kqueue mutexes which are locked for
  the duration of copyin and copyout. The per filter knote mutex
  was removed with this change as it's no longer needed.

• Fix: posix/proc fix knote use after free if a notification
  comes in for a knote which has already been freed.
  The underlying issue was a problem with the list macros not
  zeroing out prev/next pointers when items were removed from
  lists.

• Fix: prevent thread cancellation on Linux in kqueue() and
  kevent(). This prevents deadlocks occuring if a kqueue is
  shared between threads and one thread is cancelled.

• Fix: linux Cleanup all kqueues by closing their file descriptors
  and freeing associated memory on fork. A similar fix needed for
  Solaris.

• Fix: linux/read linux/write Prevent invalid access of
  fds->fds_write if the file descriptor state is freed after
  processing read events.

• Fix: linux/monitor Use an atexit handler to ensure the fd
  monitoring thread is shutdown gracefully on Linux. This fixes
  spurious leak reports from LSAN et al...

• Fix: linux/timer Allow EVFILT_TIMER filters to be modified on
  Linux (Closes #116) (Reported by: Grant Erickson).

• Fix: Set the library search path in libkqueue.pc (Closes #117)
  (Reported by: Grant Erickson)

• Fix: posix/proc will now no longer deadlock if the PID being
  monitored is reaped outside of libkqueue, or has exited before
  we start monitoring.

• Fix: posix/proc all waiters will now be informed if monitoring
  a PID fails, i.e. if the PID is reaped outside of libkqueue.

• Fix: Compilation on Windows (Closes #111).
  (Reported by: brechtsanders)

• Fix: linux/read linux/write EPOLLERR, EPOLLHUP and EPOLLRDHUP on
  sockets would not produce a kevent and no EOF indication would be
  provided to the caller.

• Fix: linux/signal pending signals of the type specified in a new
  signal event were reset when that event was added to a kqueue.

• Fix: Multiple instances of posix/proc wait thread may have been
  spawned on repeated kqueue creation/destruction. This may have
  lead to missed process exit notifications.

• Fix: Potential race between posix/proc waiter thread starting and
  events being added.

• Fix: Deadlock between posix/proc waiter thread and kqueues.

• Fix: udata should not be modified if the knote modification fails.

• Test suites now pass on macOS 11.5.2 and FreeBSD 13.

• Packaging: We now set the release number if the current checked
  out commit does not match a release tag. For example if the
  current number of commits between the last release tag and HEAD
  is 2, then the release will be -3. This allows easy upgrading
  of packages between releases.

• Add EVFILT_LIBKQUEUE to expose libkqueue specific configuration
  options. The initial implementation supports NOTE_VERSION to
  retrieve the current version number, and NOTE_VERSION_STR to
  retrieve a textual description of the version.

v2.5.0

• Add back support for monitoring process exit with EVFILT_PROC.
  The is done with pidfd_open(2) for Linux >= 5.3, and via a new common POSIX
  monitoring thread for Linux < 5.3 and other POSIX platforms.

• Fix: Include errors (EV_ERROR), and changelist entries with EV_RECEIPT in eventlist.
  (Reported by: orbitz)

v2.4.0

• Fix: avoid segfaults when kqueue descriptors are cleaned up.

• Fix: Prevent potential dead-lock in linux_kqueue_init()

• Fix: slight deadlock in thread_start()

• Fix: missing inotify_rm_watch()

• Fix: call close() in an error handling path

• Fix: take the write lock when freeing knotes

• Keep a separate state tree for file descriptors inserted into epoll to avoid conflicts between
  EVFILT_READ and EVFILT_WRITE (Closes #29 Closes #59)

• Fix: deadlock and memory leak in kqueue()

• Fix: use after free issue in decrementing kq reference counts

• Default to marking file descriptors as passive sockets if fstat() doesn't hint at the type
  (Closes #97)

• Fix various leaks and issues found by LSAN

• Install event.h in $INCLUDEDIR/kqueue/sys, rather than $INCLUDEDIR/sys

• Add support for building native Debian packages using Docker

• Detect raw sockets.

• Use high-resolution wait on Linux for timeouts finer than a millisecond.

• Various CMake improvements.

v2.3.1

• Support more knote flags
  (Credit: Dmitry Selyutin, PR #49)

• Debian packaging updates
  (Credit: Matthew Newton)

v2.3.0

• kevent: refactor to remove goto statement
  (Credit: Cameron Nemo)

• Multiple fixes for compilation issues with GCC 8.1
  (Credit: Arran Cudbard-Bell)

• Add a monitoring thread that takes care of cleaning up closed kqueues
  (Credit: Philippe Wooding)

• Multiple bug fixes for leaking descriptors in kn_delete()
  (Credit: Philippe Wooding)

• Fix build errors on Linux systems that do not use glibc
  (Credit: maxice8)

v2.1.0

• Fix an endianness issue when calling ioctl on Linux.
  (Credit: Vivian Kong)
• Allow tests to be built from separate build directory.
  (Credit: Chris Bailey)
• Add support for kevent64(2) timers from Darwin.
  (Credit: Hubertus Franke)
• Set EPOLLONESHOT for EPOLL_CTL_ADD after knote creation.
  (Credit: Ian Partridge)
• Add configure arg to disable install and build noinst ltlibrary.
  (Credit: Ian Partridge)
• Allow libkqueue to be used as a submodule within another build process.
  (Credit: Ian Partridge)
• Fix a build failure on Linux/AArch64 using Ubuntu 16.04.
  (Credit: Galen Rhodes)

v2.0.3

• Fix the generation of libkqueue.pc

v2.0.2

• Switch from SVN to Git
• Switch hosting providers to Github
• Switch to autoconf/automake