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glibc/libio
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Zack Weinberg 1711991592 Remove _IO_MTSAFE_IO from public headers. 
_IO_MTSAFE_IO controls whether stdio is *built* with support for
multithreading.  In the distant past it might also have worked as a
feature selection macro, allowing library *users* to select
thread-safe or lock-free stdio at application build time, I haven't
done the archaeology.  Nowadays, defining _IO_MTSAFE_IO while using
the installed headers, or in _ISOMAC mode, will cause libio.h to throw
syntax errors.

This patch removes _IO_MTSAFE_IO from the public headers
(specifically, from libio/libio.h).  The most important thing it
controlled in there was whether libio.h defines _IO_lock_t itself or
expects stdio-lock.h to have done it, and we do still need a
inter-header communication macro for that, because stdio-lock.h can
only define _IO_lock_t as a typedef.  I've invented
_IO_lock_t_defined, which is defined by both versions of stdio-lock.h.

_IO_MTSAFE_IO also controlled the definitions of a handful of macros
that _might_ count as part of the public libio.h interface.  They are
now unconditionally given their non-_IO_MTSAFE_IO definition in
libio/libio.h, and include/libio.h redefines them with the
_IO_MTSAFE_IO definition.  This should minimize the odds of breaking
old software that actually uses those macros.

I suspect that this entire mechanism is vestigial, and that glibc
won't build anymore if you *don't* define _IO_MTSAFE_IO, but that's
another patchset.  The bulk of libio.h is internal-use-only stuff that
no longer makes sense to expose (libstdc++ gave up on making a FILE
the same object as a C++ filebuf *decades* ago) but that, too, is
another patchset.

	* libio/libio.h: Condition dummy definition of _IO_lock_t on
	_IO_lock_t_defined, not _IO_MTSAFE_IO. Unconditionally use the
	non-_IO_MTSAFE_IO definitions for _IO_peekc, _IO_flockfile,
	_IO_funlockfile, and _IO_ftrylockfile.  Only define
	_IO_cleanup_region_start and _IO_cleanup_region_end if not
	already defined.
	* include/libio.h: If _IO_MTSAFE_IO is defined, redefine
        _IO_peekc, _IO_flockfile, _IO_funlockfile, and _IO_ftrylockfile
        appropriately.
	* sysdeps/generic/stdio-lock.h, sysdeps/nptl/stdio-lock.h:
	Define _IO_lock_t_defined after defining _IO_lock_t.
2017-05-11 19:14:11 -04:00
..
bits Remove C++ namespace handling from glibc headers. 2017-03-16 13:31:57 +00:00
__fbufsize.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
__flbf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
__fpending.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
__fpurge.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
__freadable.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
__freading.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
__fsetlocking.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
__fwritable.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
__fwriting.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
bug-fopena+.c Update. 2002-08-27 06:41:29 +00:00
bug-fseek.c Update. 2002-07-24 11:18:48 +00:00
bug-ftell.c * libio/bug-ftell.c (do_test): Add a cast. 2003-11-01 21:11:05 +00:00
bug-memstream1.c Add missing header files throughout the testsuite. 2017-02-16 17:33:18 -05:00
bug-mmap-fflush.c Update. 2002-08-27 12:10:11 +00:00
bug-rewind2.c Fix warnings in fwscanf / rewind tests. 2014-11-26 12:54:39 +00:00
bug-rewind.c Fix warnings in fwscanf / rewind tests. 2014-11-26 12:54:39 +00:00
bug-ungetc2.c Update. 2003-09-06 09:56:14 +00:00
bug-ungetc3.c Update. 2004-11-09 07:05:27 +00:00
bug-ungetc4.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
bug-ungetc.c 2002-07-24 Roland McGrath <roland@frob.com> 2002-07-24 09:34:59 +00:00
bug-ungetwc1.c Fix libio/bug-ungetwc1.c warning. 2014-11-27 16:01:04 +00:00
bug-ungetwc2.c Update. 2002-04-24 21:09:14 +00:00
bug-wfflush.c * libio/bug-wfflush.c (do_test): Call rewind instead of fsetpos. 2002-11-11 06:55:22 +00:00
bug-wmemstream1.c Add missing header files throughout the testsuite. 2017-02-16 17:33:18 -05:00
bug-wsetpos.c Fix fsetpos on wide stream. 2009-09-02 19:45:33 -07:00
clearerr_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
clearerr.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Depend New file, libio needs localedata for tests. 2000-07-29 07:57:34 +00:00
fcloseall.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
feof_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
feof.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ferror_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ferror.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
filedoalloc.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fileno.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fileops.c Assume that O_CLOEXEC is always defined and works 2017-04-18 14:56:51 +02:00
fmemopen.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fputc_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fputc.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fputwc_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fputwc.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
freopen64.c Assume that dup3 is available 2017-04-18 14:42:19 +02:00
freopen.c Assume that dup3 is available 2017-04-18 14:42:19 +02:00
fseek.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fseeko64.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fseeko.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ftello64.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ftello.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fwide.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fwprintf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fwscanf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
genops.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getc_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getc.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getchar_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getchar.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getwc_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getwc.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getwchar_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getwchar.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofclose.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofdopen.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofflush_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofflush.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofgetpos64.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofgetpos.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofgets_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofgets.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofgetws_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofgetws.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofopen64.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofopen.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofopncook.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofputs_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofputs.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofputws_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofputws.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofread_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofread.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofsetpos64.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofsetpos.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ioftell.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofwide.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofwrite_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iofwrite.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iogetdelim.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iogetline.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iogets.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iogetwline.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iolibio.h Remove use of INTDEF/INTUSE in libio 2012-05-24 23:06:20 +02:00
iopadn.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iopopen.c Assume that O_CLOEXEC is always defined and works 2017-04-18 14:56:51 +02:00
ioputs.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ioseekoff.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ioseekpos.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iosetbuffer.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iosetvbuf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ioungetc.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ioungetwc.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iovdprintf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iovsprintf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iovsscanf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iovswscanf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iowpadn.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
libc_fatal.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
libio.h Remove _IO_MTSAFE_IO from public headers. 2017-05-11 19:14:11 -04:00
libioP.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Makefile Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memstream.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
obprintf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
oldfileops.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
oldfmemopen.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
oldiofclose.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
oldiofdopen.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
oldiofgetpos64.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
oldiofgetpos.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
oldiofopen.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
oldiofsetpos64.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
oldiofsetpos.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
oldiopopen.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
oldpclose.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
oldstdfiles.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
oldtmpfile.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
pclose.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
peekc.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
putc_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
putc.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
putchar_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
putchar.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
putwc_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
putwc.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
putwchar_u.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
putwchar.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
rewind.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
setbuf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
setlinebuf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
stdfiles.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
stdio.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
stdio.h getopt: eliminate __need_getopt by splitting up getopt.h. 2017-04-07 07:53:03 -04:00
strfile.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strops.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
swprintf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
swscanf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-fmemopen.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-freopen.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-freopen.sh Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst_getwc.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst_getwc.input Update. 2000-06-23 06:22:36 +00:00
tst_putwc.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst_swprintf.c Fix format strings. 2002-09-30 07:47:16 +00:00
tst_swscanf.c Update. 2001-02-09 17:57:28 +00:00
tst_wprintf2.c Add dependencies on needed locales in each subdir tests (bug 18969) 2015-10-12 15:18:08 +02:00
tst_wprintf.c Update. 2000-06-17 19:22:43 +00:00
tst_wscanf.c Update. 2001-02-09 17:57:28 +00:00
tst_wscanf.input Update. 1999-06-16 22:55:47 +00:00
tst-atime.c Fix libio/tst-atime not to presume ST_NOATIME exists. 2015-02-06 12:24:16 -08:00
tst-eof.c pdate. 2002-07-23 00:31:41 +00:00
tst-ext2.c * libio/Makefile (tests): Add tst-ext2. 2007-10-13 07:33:09 +00:00
tst-ext.c Update. 2001-03-27 00:16:51 +00:00
tst-fgetwc.c (do_test): Use de_DE.UTF-8 as locale name. 2009-06-15 17:27:48 -07:00
tst-fgetwc.input 2009-02-04 Ulrich Drepper <drepper@redhat.com> 2009-02-04 21:27:48 +00:00
tst-fgetws.c Fix format strings. 2002-09-30 07:47:16 +00:00
tst-fopenloc2.c [BZ #2173] 2006-01-19 01:35:28 +00:00
tst-fopenloc.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst-fputws.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst-freopen.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst-fseek.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst-ftell-active-handler.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst-ftell-append.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst-ftell-partial-wide.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst-fwrite-error.c Add missing header files throughout the testsuite. 2017-02-16 17:33:18 -05:00
tst-memstream1.c Add missing header files throughout the testsuite. 2017-02-16 17:33:18 -05:00
tst-memstream2.c Add missing header files throughout the testsuite. 2017-02-16 17:33:18 -05:00
tst-memstream3.c Add missing header files throughout the testsuite. 2017-02-16 17:33:18 -05:00
tst-mmap2-eofsync.c 2016-06-11 Paul Pluzhnikov <ppluzhnikov@google.com> 2016-06-11 14:50:16 -07:00
tst-mmap-eofsync.c * locale/xlocale.h (struct __locale_struct): New member `__names'. 2002-08-30 10:36:44 +00:00
tst-mmap-fflushsync.c * locale/xlocale.h (struct __locale_struct): New member `__names'. 2002-08-30 10:36:44 +00:00
tst-mmap-offend.c * locale/xlocale.h (struct __locale_struct): New member `__names'. 2002-08-30 10:36:44 +00:00
tst-mmap-setvbuf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst-popen1.c * sysdeps/unix/sysv/linux/syscalls.list: Add __pipe2 alias. 2008-07-27 18:26:13 +00:00
tst-setvbuf1.c [BZ #2337] 2006-12-13 23:17:54 +00:00
tst-sscanf.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-swscanf.c Update. 2002-02-26 18:08:08 +00:00
tst-ungetwc1.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-ungetwc2.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-widetext.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst-widetext.input Rename Oriya locale to Odia (bug 15601) 2013-11-20 17:47:41 +05:30
tst-wmemstream1.c * posix/glob.c (glob_in_dir): Add some comments and asserts to 2006-09-30 15:09:35 +00:00
tst-wmemstream2.c * posix/glob.c (glob_in_dir): Add some comments and asserts to 2006-09-30 15:09:35 +00:00
tst-wmemstream3.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
vasprintf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Versions libio: fmemopen rewrite to POSIX compliance 2015-07-08 12:07:21 -03:00
vscanf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
vsnprintf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
vswprintf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
vtables.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
vwprintf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
vwscanf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wfiledoalloc.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wfileops.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wgenops.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wmemstream.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wprintf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wscanf.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wstrops.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00