--- IO-AIO/Changes	2013/09/07 23:18:23	1.313
+++ IO-AIO/Changes	2022/09/26 10:30:54	1.409
@@ -2,16 +2,11 @@
 
 TODO: scandir - some dirs mostly contain subdirs - invert logic?
 TODO: aio_cptree/mvtree
-TODO: reduce condvar fairness: schedule hot-cache-threads first?
 TODO: vmsplice? (http://kerneltrap.org/node/6505 http://lwn.net/Articles/178199/)
-TODO: aio_fcntl, at least for file-locking
-TODO: aio_mincore?
-TODO: getxattr etc.?
-TODO: F_DUPFD_CLOEXEC
+TODO: getxattr, setxattr, listxattr, removexattr etc.?
 TODO: emulation for splice?
-TODO: eio_mmap|mlock|munmap|splice...
 TODO: syncfs/sync windows:
-TODO: F_SETPIPE_SZ, F_GETPIPE_SZ
+TODO: posix_fallocate when flags=0
 http://stackoverflow.com/questions/65170/how-to-get-name-associated-with-open-handle/5286888#5286888
 http://blogs.msdn.com/b/adioltean/archive/2005/04/16/408947.aspx
 http://msdn.microsoft.com/en-us/library/aa366789%28v=vs.85%29.aspx
@@ -20,12 +15,223 @@
 http://msdn.microsoft.com/en-us/library/windows/desktop/aa364963%28v=vs.85%29.aspx
 http://msdn.microsoft.com/en-us/library/windows/desktop/aa364996%28v=vs.85%29.aspx
 http://msdn.microsoft.com/en-us/library/windows/desktop/aa364994%28v=vs.85%29.aspx
-
 TODO: extra socket/tcp constants &c?
-TODO: take permission denied into account in treescan
+TODO: name_to_handle_At + open_by_handle_at = clone fds
+TODO: lchown
+TODO: ioprio_get/set
+
+TODO: rewrite rmtree et al. to support working directories (also speed them up)
+TODO: maybe IO::AIO leaks fds when requests are cancelled? maybe initialise result to -1?
+TODO: aio_wd should use O_PATH on linux, due to lacking O_SEARCH (http://comments.gmane.org/gmane.linux.file-systems/33611)
+      http://www.openwall.com/lists/musl/2013/02/23/4
+TODO: FIDEDUPERANGE, file_ioctl.c
+TODO: mincore
+TODO: SOCK_CLOEXEc etc.
+TODO: unlinkat flags, linkat flags, statat, renameat2 flags
+TODO: https://kernelnewbies.org/Linux_4.11
+TODO: define useful rules for [[$wd, $path], $path] &c and implement them
+TODO: https://github.com/coreutils/coreutils/blob/master/src/stat.c maybe IO::AIO::FSID
+TODO: mlock2, MLOCK_ONFAULT
+TODO: dup3, pipe2, accept4
+TODO: dump config.log when automated testign and configure fails
+TODO: ns time resolution in utime
+TODO: statx
+TODO: aio_fchdir/chdir? emulate chdirat?
+TODO: rt-4.0.18-20109-1573826674-1229.126277-5-0@rt.cpan.org
+TODO: aio_splice, aio_tee
+TODO: copy_file_range
+TODO: write more abpout the thread model, maybe bump some defaults?
+TODO: io_uring, but it's so broken  :/
+TODO: allow import of fds as aio_wd
+TODO: close_range
+TODO: move_mount, open_tree, fsmount, fspick, fsconfig, fsopen https://lwn.net/Articles/759499/
+
+	- another workaround for the low-quality musl libc.
+	- test for umount seperately, as it is more portable.
+
+4.79 Sun 25 Sep 2022 18:25:53 CEST
+	- the autoconf result of the mount check was not used, so it failed to
+          compile on most systems (reported by crackoff@tutanota.com).
+	- work around fedora not having a working C compiler setup by design
+          (reported by Paul Howarth).
+
+4.78 Tue 06 Sep 2022 12:54:43 CEST
+	- add IO::AIO::mount and IO::AIO::umount.
+	- add a bunch of symbols from sys/mount.h.
+
+4.77 Mon 05 Sep 2022 02:03:38 CEST
+	- add MFD_HUGETLB_2MB and MFD_HUGETLB_1GB constants.
+        - add fexecve.
+        - add lots of missing functions to @EXPORT_OK.
+
+4.76 Tue Jul 27 20:45:01 CEST 2021
+	- add autoconf test for siginfo_t, which is, of course, not
+          available on windows (reported by Peter Petky).
+	- disable syscalls on solaris, as perl seems to provide an
+          incompatible syscall prototype that clashes with sys/syscall.h.
+        - add MAP_FIXED_NOREPLACE, MAP_SHARED_VALIDATE, MAP_SYNC and
+          MAP_UNINITIALIZED.
+
+4.75 Wed Dec 30 08:44:55 CET 2020
+	- removed leftover debug output from treescan.
+	- added (but not documented) waitid-P_*, FSPICK_*, FSOPEN_*,
+          FSCONFIG_*, MOUNT_ATTR_* constants.
+
+4.74 Tue Dec 29 16:19:28 CET 2020
+	- added pidfd_open, pidfd_getfd and pidfd_send_signal functions.
+        - rework bin/treescan to avoid recursion. This fixes two bugs
+          where a deep directory traversal or a lot of command line
+          arguments could cause it to crash.
+	- added (but not documented) open_tree, AT_* and move_mount flags.
+        - support defining syscall numbers in gendef0.
+
+4.73 Fri Dec  4 02:08:37 CET 2020
+	- def0.h was not uptodate, running into musl problems
+          (reported by B Fraser).
+	- IO::AIO::splice and IO::AIO::tee didn't properly return
+          64 bit values.
+	- added IO::AIO::accept4.
+	- add various F_SEAL related fcntl constants.
+        - removed experimental marker for fdlimit functions.
+        - fiemap now includes the last segment even if it overflows
+          the end offset, which is arguably the correct behaviour.
+
+4.72 Wed Apr  3 04:56:03 CEST 2019
+        - (libeio) if fd 0 is available do not use it for aio_wd, as it
+          collides with IO::AIO::CWD.
+	- added IO::AIO::memfd_create.
+	- correctly include <sys/uio.h> in the vmsplice test.
+        - reduce codesize by ~7% on amd64 by declaring more functions
+          as noinline.
+        - documentation fixes and updates.
+        - experimental and undocumented preliminary support for synchronous statx.
+
+4.71 Sun Mar 10 13:09:26 CET 2019
+	- due to an error in the linux manpages, the configure tests
+          for readahead, sync_file_range, splice etc. failed. This has been fixed.
+
+4.7  Mon Mar  4 11:28:13 CET 2019
+	- majorly speed up scandir for the very special case of a non-POSIX
+          filesystem that nevertheless reports valid dt_type information.
+          The only known filesystem of this type is currently btrfs, which
+          didn't get it's act together to implement POSIX semantics in all
+          these years, and I am tired of waiting.
+	- add IO::AIO::MCL_ONFAULT for mlockall, add IO::AIO::mlockall.
+	- neither sys/mkdev.h nor sys/sysmacros.h were included, even when they
+          were detected by autoconf.
+
+4.6  Sat Aug 25 21:58:36 CEST 2018
+	- add st_btime, st_btimesec, st_btimensec and st_gen accessors,
+          mostly for bsds which expose birthtime and st_gen members (netbsd, freebsd
+          but only st_gen on openbsd because they compiled their perl without support
+          for birthtimes).
+        - fix madvise and munlock to properly support negative offsets.
+        - allocate fd for the aio_close at boot time, to guarantee it working
+          later, rather than calling abort when it fails. also avoids
+          close-on-exec race issues after module load.
+        - #undef utime on win32, maybe this helps some reports of utime hangs.
+        - minor doc improvements.
+        - minor configure cleanups.
+        - use $Config{perllibs} instead of libs for configure. might help people
+          who didn't install all perl dependencies (might break things as well).
+
+4.54 Tue Aug 14 13:54:48 CEST 2018
+	- include sys/mkdev.h or sys/sysmacros.h if available.
+        - further tweaks to configure invocation for systems requiring --rpath.
+        - no longer rely on custom paths on win32 platforms.
+        - try to work around buggy PAGESIZE macro on solaris.
+
+4.53 Tue Aug 14 11:27:50 CEST 2018
+	- add $Config{libs} to LIBS for configure, to work around systems
+          with broken library dependencies (... openbsd).
+
+4.52 Sun Aug 12 08:09:45 CEST 2018
+	- config.h.in was missing in distribution.
+
+4.51 Sun Aug 12 07:24:14 CEST 2018
+	- complete rework of the autoconf framework: IO::AIO now uses its own
+          config.h, separate from libeio, and tries to test the actual perl
+          environment, not the standard system environment.
+        - provide nanosecond-accracy stat time accessors for both perl and IO::AIO
+          stat functions.
+	- removed non-portable C++ syntax from eio.c.
+        - try to fix readdir tests on cygwin spuriously failing.
+
+4.5  Wed Aug  1 00:23:55 CEST 2018
+	- aio_mtouch touch all pages as requested, not just the first page in most cases.
+        - new function: IO::AIO::mremap, linux-specific mremap, with constants MREMAP_MAYMOVE
+          and MREMAP_FIXED.
+        - add O_ACCMODE.
+	- add (undocumented) MSG_CMSG_CLOEXEC and SOCK_CLOEXEC constants.
+
+4.4   Tue Feb 20 07:54:12 CET 2018
+	- new aio_slurp request.
+        - add (experimental) IO::AIO::eventfd and timerfd* function.
+	- add (experimental) IO::AIO::get_fdlimit and IO::AIO::min_fdlimit.
+        - point out that aio_copy overwrites existing files.
+        - removed filesystem magic number table from aio_statvfs docs as
+          statvfs doesn't actually return this info at all (statfs does).
+        - add a bunch of (mostly linux-specific) constants for use in ioctls
+          (see aio_ioctl docs).
+        - treescan now has a proper manpage and useful --help output.
+        - new option --sync in treescan, to sync everything in a subtree.
+        - changed default for aio_msync flags to MSYNC_SYNC.
+        - document offset/length behaviour of mprotect/madvise.
+        - support linux's renameat2 (via aio_rename2).
+        - add aio_rename2, an aio_rename with flags.
+        - add F_DUPPFD_CLOEXEC, F_OFD_[SG]ETLKW? constants.
+        - add FALLOC_FL_INSERT_RANGE, FALLOC_FL_UNSHARE_RANGE.
+        - (libeio) use posix_close if available.
+        - (libeio) internal close() calls no longer disturb errno.
+        - add IO:AIO::FALLOC_FL_UNSHARE.
+        - update schmorp.h for removal of USE_SOCKETS_AS_HANDLES
+          and better eventfd detection.
+
+4.34  Sun May  1 19:18:24 CEST 2016
+	- def0.h was not properly generated during previous release, causing
+          compile errors on various platforms.
+	- major/minor were accidentally switched (reported by Alexander Lishenyuk).
+	- removed duplicate definition of MAP_HUGETLB, that was found due to
+          a bug in Perl::Tidy (testcase by alaska332@gmail.com).
+        - added (untested!) aio_fcntl, aio_ioctl requests.
+        - (libeio) names set via prctl are truncated to 15 chars + nul, not 16,
+          as manpages-dev originally claimed.
+
+4.33  Mon Jan 18 12:50:10 CET 2016
+	- add IO::AIO::pipe2 function.
+        - added support for FALLOC_FL_COLLAPSE_RANGE and FALLOC_FL_ZERO_RANGE
+          constants.
+        - added support for O_TMPFILE and O_PATH constants.
+        - added support for MAP_FIXED, MAP_GROWSDOWN,MAP_32BIT, MAP_HUGETLB, MAP_STACK
+          consdtants, whether they can be sensibly used or not.
+	- use NO_INIT where applicable.
+        - update libecb.
+        - added stability canary support.
+        - updated linux super magic table to 4.3.3.
+
+4.32  Wed Feb 11 20:32:11 CET 2015
+	- replace off_t by STRLEN where appropriate, should not result in
+          user-visible changes.
+        - update ecb.h for C11 compatibility.
+
+4.31  Tue Jun  3 03:29:27 CEST 2014
+	- work around more 5.20 bugs. backwards compatibility my ass.
+
+4.3   Fri Apr 11 06:22:38 CEST 2014
+	- perl5porters broke Async::Interrupt, BDB, EV, IO::AIO, OpenCL
+          without warning by switching the meaning of USE_SOCKETS_AS_HANDLES
+          in 5.18. What's so attractive about giving a shit about backwards
+          compatibility - I will never understand.
+
+4.2   Sat Jan 25 01:13:14 CET 2014
+	- aio_group could corrupt memory because it didn't restore
+          the stack after req_submit.
+        - be more careful on (e.g. permission) errors in bin/treescan.
+	- work around changes in ExtUtils::MakeMaker.
 	- (libeio) implement aio_realpath for win32.
         - (xthread) work around compile time bugs in ptw32.
         - added IO::AIO::pipesize.
+        - (libecb) insignificant update.
 
 4.19  Sun Jan  6 12:47:26 CET 2013
 	- avoid endless loop in fiemap with some XFS files.