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* NEWS: Record release date.

* tests/tail-2/pipe-f.sh: Close stdout in a subshell
to ensure the current shell isn't impacted.  Subsequent
piped commands like `echo foo | blah` were seen to fail
due to the previous closing of stdout.
Reported by Assaf Gordon.

* README: Document the new handling of 32 bit time_t,
with examples of how to build in 64 bit mode on AIX.
Also mention that GNU make is desired on AIX
due to its mishandling of the "[" target.
Suggested by Assaf Gordon.

* tests/misc/ptx.pl: Escape the '^' character which is
otherwise considered as a line continuation character.
* tests/misc/shred-remove.sh: sed doesn't support \n.

* build-aux/git-log-fix: Remove old entry.

* .gitignore: Ignore the generated coverage report.

* Makefile.am: Update the oldest documented version
to 8.20 which is now about 5 years old.

POSIX specification for chmod(1):
https://pubs.opengroup.org/onlinepubs/9699919799/utilities/chmod.html

* doc/coreutils.texi (chmod invocation): Add a sentence about who can
change the file mode bits of a file - (almost) a copy from what POSIX
requires.

Fixes https://bugs.gnu.org/29207.

* tests/misc/timeout.sh: dash outputs the "Killed"
message to stderr rather than the terminal.
* tests/misc/usage_vs_getopt.sh: dash doesn't yet
support the POSIX proposed $'...' shell quoting syntax.

* src/ptx.c (fix_output_parameters): GCC 6.3.1 with
./configure --enable-single-binary would give:
  error: assuming signed overflow does not occur
  when simplifying conditional to constant [-Werror=strict-overflow]
    if (file_index > 0)
So change the type of file_index to signed (size_t).

* bootstrap.conf: s/strftime/nstrfrime/.

* gnulib: Update with various build/test fixes.

* test/dd/nocache_eof.sh: Also handle fadvise64_64 which is
used on 32 bit x86.  Note strace internally maps fadvise64_64
to {arm,xtensa}_fadvise64_64.

* src/tail.c (tail_bytes): On systems were blksize_t is unsigned
and the same size or wider than off_t (android for example),
our initialized (off_t) -1 would be promoted to unsigned before
comparison, and thus fail to follow the appropriate path.
* tests/tail-2/tail-c.sh: Add a test case.
* NEWS: Mention the fix.
This issue was introduced in commit v8.23-47-g2662702b
Reported at https://github.com/termux/termux-app/issues/233

* m4/jm-macros.m4: Check for the header.
* src/dd.c: Avoid the workaround where the header
is not available (on non glibc systems).
* src/shred.c: Likewise.

* src/ls.c (usage): Clarify -k only applies to -s usage
and directory 'total' lines.  Move the description
of TIME_STYLE out of the option section as it was awkward
to read and write there within 80 columns.

* man/chmod.x: Update the information to state one can
clear the setuid and setgid bits for directories numerically
using an additional leading '0' or a leading '='.
That has been supported since v8.15-64-g8931cdbf.
Fixes https://bugs.gnu.org/29390

* doc/coreutils.texi (shred invocation): s/truncate/deallocate/.
* src/shred.c (usage): Likewise.
Fixes https://bugs.gnu.org/29317

* doc/coreutils.texi (cp invocation): The language used
to describe recreating the file was a little confusing
as it mentioned opening a removed file.
Fixes https://bugs.gnu.org/29315

* doc/coreutils.texi (stat invocation): The default value
of QUOTING_STYLE for the %N format of 'stat --printf' is
'shell-escape-always'.
Fixes https://bugs.gnu.org/29563
Reported by Christian Groessler at
https://bugzilla.redhat.com/1520399#c3

* tests/ls/block-size.sh: The output of the test was hard to read. Add
comments saying what we are testing to make it easier to understand.

Verify that all options mentioned in usage are actually recognized
by the program.

* tests/misc/usage_vs_getopt.sh: Add test.
* tests/local.mk (all_tests): Reference it.
Co-authored-by: Pádraig Brady <P@draigBrady.com>

* src/readlink.c (usage): Remove ',' after --quiet option.

Previously, e.g. cksum failed to output the offending unknown long
option:
  $ cksum --unknown-opt
  cksum: invalid option -- '-'
  Try 'cksum --help' for more information.
i.e., it tried to diagnose '-' as short option.
Instead, it should diagnose the unknown long option:
  $ cksum --unknown-opt
  cksum: unrecognized option '--unknown-opt'
  Try 'cksum --help' for more information.

* src/cksum.c (long_options): Add struct with null entry only.
(main): Use it in the getopt_long call.
* src/dd.c: Likewise.
* src/hostid.c: Likewise.
* src/hostname.c: Likewise.
* src/link.c: Likewise.
* src/logname.c: Likewise.
* src/nohup.c: Likewise.
* src/sleep.c: Likewise.
* src/tsort.c: Likewise.
* src/unlink.c: Likewise.
* src/uptime.c: Likewise.
* src/users.c: Likewise.
* src/whoami.c: Likewise.
* src/yes.c: Likewise.
* NEWS (Improvements): Mention the fix.

* tests/cp/preserve-mode.sh: This was the only use of awk,
which may not be available on the system resulting
in an ineffective test.  Also the permissions bits for
directories were not being checked at all.

* gnulib: Update with various build/test fixes.

* gnulib: Update including various build fixes.

* src/timeout.c (main): Add short option character 'v' to getopt_long
call.
* tests/misc/timeout.sh: Run the test both for the long and the short
option.

* src/dd.c (iread): Handle read error with a non-aligned
file offset in the O_DIRECT case.  This is not an issue
on XFS at least, but on EXT4 the final read will return
EINVAL rather than the expected 0 to indicate EOF.
* tests/dd/direct.sh: Test the iflag=direct case also.
* NEWS: Mention the improvement.

This is useful as handling in shell is complicated
with the varying exit status in the --kill-after case.

* src/timeout.c (main): Handle '-v' and store
COMMAND for the diagnostic.
(cleanup): Diagnose the signal name before sending.
(usage): Document -v, --verbose.
* doc/coreutils.texi (timeout invocation): Likewise.
* tests/misc/timeout.sh: Add a test case.
* NEWS: Mention the new feature
Fixes https://bugs.gnu.org/21760

* src/tail.c (tail_bytes): Try lseek(..., SEEK_END) when
we can't determine the file size.
* tests/tail-2/end-of-device.sh: Add a new root only test.
* tests/local.mk: Reference the new test.
* NEWS: Mention the improvement.
Paul Eggert suggested using lseek() (rather than ioctl(BLKGETSIZE64)).
Fixes https://bugs.gnu.org/29259

* bootstrap.conf (gnulib_modules): Add 'year2038' to ensure that time_t
is 64-bit (and thus works after 2038).

Suggested by Bruno Haible in
https://lists.gnu.org/r/bug-gnulib/2017-11/msg00022.html

* gnulib: Update - mainly for the recent year2038 changes.
* tests/init.sh: Update from gnulib/tests/init.sh.

These templates instruct contributors not to use github, and instead
use the upstream GNU development resources. Discussed in
http://lists.gnu.org/archive/html/coreutils/2017-11/msg00007.html .

* .github/ISSUE_TEMPLATE.txt,
  .github/PULL_REQUEST_TEMPLATE.txt: New files.

* scripts/git-hooks/commit-msg: Require the abbreviated "/r/"
form in any log message URL.

Each /archive/html/ part can be replace with /r/.
Run this to induce the change:
git grep -l archive/html|xargs perl -pi -e 's,/archive/html/,/r/,g'
* TODO: Perform that substitution.
* bootstrap: Likewise.
* src/sort.c (sequential_sort): Likewise.
* src/tail.c (tail_file): Likewise.
* tests/misc/sort-merge-fdlimit.sh: Likewise.
* tests/misc/stty-row-col.sh: Likewise.
* tests/misc/unexpand.pl: Likewise.
* tests/rm/readdir-bug.sh: Likewise.
* tests/tail-2/inotify-rotate.sh: Likewise.

* tests/ls/readdir-mountpoint-inode.sh: Skip the test
if any mount points are inaccessible by the current user.
Fixes https://bugs.gnu.org/29167
Reported at: https://bugs.gentoo.org/353164

Older versions of 'makeinfo' choke on a missing reference:

  ./doc/coreutils.texi:14177: `Realpath usage examples' has no Up field\
  (perhaps incorrect sectioning?).
  makeinfo: Removing output file `doc/coreutils.info' due to errors; \
  use --force to preserve.

* doc/coreutils.texi (realpath invocation): Add a menu referencing
the usage examples - introduced in v8.27-91-g7449f0d0.

* configure.ac(AC_INIT): Specify the URL explicitly, so we're
not dependent on unreleased autoconf.

Suggested by L A Walsh in https://bugs.gnu.org/28763 .

* src/stat.c (fmt_terse_fs): Define format for --terse -f here.
(fmt_terse_regular): Define format for --terse here.
(fmt_terse_selinux): Likewise for when SELinux is enabled.
(default_format): Use the above constants.
(usage): Output the formats for the terse modes.