[2020-11-08]
* ipfw: sysctl OID 'net.ip.fw.table.<id>.count' -> ipfw table <id> show malloc()
* ipfw: sysctl OID 'net.ip.fw.table.<id>.hits' (miss?)
* ipfw: sysctl OID 'net.ip.fw.table.<id>.create_time' ?
* ipfw: sysctl OID 'net.ip.fw.table.<id>.update_time' ?
* ipfw: sysctl OID 'net.ip.fw.table.<id>.last_used_time' ?
* ipfw: ipfw table <id> test <ip>
* ipfw: ipfw table <id> autoexpire <time>
* ipfw: use Allotment Routing Table (ART)
* ipfw: support ifgroup
* ipfw: support NAT (see ipfw3/freebsd)

[2020-11-09]
* fdescfs: port from freebsd (why it was removed??)
  - /dev/fd -> /proc/self/fd
  - /proc/self/fd/<num> -> file path (see Linux's)
* kqueue: support to watch directory for its content/files changes
  (similar to inotify)
* implement FSEvents API (macOS):
  - https://forums.freebsd.org/threads/inotify-for-freebsd.38162/post-400040
  - https://developer.apple.com/library/archive/documentation/Darwin/Conceptual/FSEvents_ProgGuide/Introduction/Introduction.html
  - https://github.com/apple/darwin-xnu/blob/master/bsd/sys/fsevents.h

[2020-11-13]
* stress2: The FreeBSD Kernel Stress Test Suite
  - https://people.freebsd.org/~pho/stress/index.html

[2020-11-14]
* kqueue: bring in updates from freebsd

[2020-12-31]
* check 'uname -K' and 'uname -U' on startup, and warn if mismatch

[2021-01-02]
* Add flag '-i' to man(1) to ignore case (same as Linux)
* Add flag '-I' to man(1) to match case (same as Linux)
* Prompt to choose the man page if multiple match found
  (see OpenSUSE's patch and the POSIXLY_CORRECT environment variable)
* Use makefs(8) to create initrd without using vn(4)

[2021-01-03]
* cp(1): remove fts sorting
  https://cgit.freebsd.org/src/commit/bin/cp/cp.c?id=c633f8dc046f6a9589887ef057374d034e7dac72
  (via mjg)

[2021-01-08]
* integrate fixes from NetBSD network security audit
  https://blog.netbsd.org/tnf/entry/network_security_audit

[2021-01-21]
* freebsd's procstat(1)
  - kern_descrip.c:
  - sysctl_kern_proc_filedesc()

[2021-01-23]
* open(2): O_EXEC

[2021-01-27]
* procfs:
  - /proc/<pid>/fd : dr-x------
  - /dev/fd -> /proc/curproc/fd
  - /dev/stdin -> /proc/curproc/fd/0

[2021-02-25]
* POSIX timer
- https://pubs.opengroup.org/onlinepubs/9699919799/functions/sigqueue.html
- Add member fields for POSIX timer.
  https://github.com/freebsd/freebsd-src/commit/575c4eadf68ecda15af1a6f8aba1c378e072728e
- Implement POSIX timers
  https://github.com/freebsd/freebsd-src/commit/86857b368d4186c9c57f3472f55f5c3346d8a0c1
- Regen for POSIX timer syscalls
  https://github.com/freebsd/freebsd-src/commit/e706ee8a1662aaef86a22b423685cdf02dd906cf
- Add experiment code to implement POSIX timer's SIGEV_THREAD notification
  https://github.com/freebsd/freebsd-src/commit/07b68894268ed96d92912cfe866076e5ddfd32d3
- Let itimer store itimerspec instead of itimerval
  https://github.com/freebsd/freebsd-src/commit/56c06c4b674b7f19af6b1aa9960966d3b82dd245
- Add POSIX timer interfaces
  https://github.com/freebsd/freebsd-src/commit/bd3e40ce722e4de93a8b21757552d4309a90eba1
- Add POSIX timer manuals
  https://github.com/freebsd/freebsd-src/commit/bb5eebe6f2b6958db9fbde8ab11d74a5fc26ffd8
- Let kernel POSIX timer code and mqueue code to use integer as a resource
  https://github.com/freebsd/freebsd-src/commit/61d3a4efc24f240ff5625b9220aa441ed82c2fae
- Bring in my initial version of POSIX realtime extension library
  https://github.com/freebsd/freebsd-src/commit/4acaec8fc369aa259921e7a4b0b05dbc1c3491ae
- Remove third parameter of itimer_find, the parameter is always zero
  https://github.com/freebsd/freebsd-src/commit/843b99c6f7feb1ca0c362d08fa62b62b1d8f44c7

* Signal Queue
- https://pubs.opengroup.org/onlinepubs/9699919799/functions/sigqueue.html
- sigqueue implementation
  https://github.com/freebsd/freebsd-src/commit/9104847f216771dfda5d78a6dd4974882f1a55cd
- Make ksiginfo_alloc and ksiginfo_free public
  https://github.com/freebsd/freebsd-src/commit/5da49fcb8a52cb119d97d64aa185d85226cac472
- Add support for queueing SIGCHLD same as other UNIX systems did
  https://github.com/freebsd/freebsd-src/commit/ebceaf6dc73f541949cc3ab9f35924d762395692
- Add signal set sq_kill to sigqueue structure
  https://github.com/freebsd/freebsd-src/commit/3dfcaad66744d533a73b0aecb1901fcf5e816423

[2021-03-01]
* perror(1):
  - print out error name (e.g., ERESTART) as well
  - print out multiple errors of the same code
  - print out error name from error code

[2021-03-02]
* mv(1):
  - mv a/ b/: error: 'a/' is not a directory
  - mv a b/: works