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glibc/libio
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Adhemerval Zanella 0b727ed4d6 libio: Flush stream at freopen (BZ#21037) 
As POSIX states [1] a freopen call should first flush the stream as if by a
call fflush.  C99 (n1256) and C11 (n1570) only states the function should
first close any file associated with the specific stream.  Although current
implementation only follow C specification, current BSD and other libc
implementation (musl) are in sync with POSIX and fflush the stream.

This patch change freopen{64} to fflush the stream before actually reopening
it (or returning if the stream does not support reopen).  It also changes the
Linux implementation to avoid a dynamic allocation on 'fd_to_filename'.

Checked on x86_64-linux-gnu.

	[BZ #21037]
	* libio/Makefile (tests): Add tst-memstream4 and tst-wmemstream4.
	* libio/freopen.c (freopen): Sync stream before reopen and adjust to
	new fd_to_filename interface.
	* libio/freopen64.c (freopen64): Likewise.
	* libio/tst-memstream.h: New file.
	* libio/tst-memstream4.c: Likewise.
	* libio/tst-wmemstream4.c: Likewise.
	* sysdeps/generic/fd_to_filename.h (fd_to_filename): Change signature.
	* sysdeps/unix/sysv/linux/fd_to_filename.h (fd_to_filename): Likewise
	and remove internal dynamic allocation.

[1] http://pubs.opengroup.org/onlinepubs/9699919799/
2018-10-02 10:01:56 -03:00
..
bits
Remove _IO_file_flags define.
2018-02-21 14:22:50 -05:00
__fbufsize.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
__flbf.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
__fpending.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
__fpurge.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
__freadable.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
__freading.c
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2018-01-01 00:32:25 +00:00
__fsetlocking.c
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2018-01-01 00:32:25 +00:00
__fwritable.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
__fwriting.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
bug-fopena+.c
…
bug-fseek.c
…
bug-ftell.c
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bug-memstream1.c
Add missing header files throughout the testsuite.
2017-02-16 17:33:18 -05:00
bug-mmap-fflush.c
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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
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bug-ungetc3.c
…
bug-ungetc4.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
bug-ungetc.c
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bug-ungetwc1.c
Fix libio/bug-ungetwc1.c warning.
2014-11-27 16:01:04 +00:00
bug-ungetwc2.c
…
bug-wfflush.c
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bug-wmemstream1.c
Add missing header files throughout the testsuite.
2017-02-16 17:33:18 -05:00
bug-wsetpos.c
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clearerr_u.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
clearerr.c
Remove miscellaneous debris from libio.
2018-02-21 14:39:54 -05:00
Depend
…
fcloseall.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
feof_u.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
feof.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
ferror_u.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
ferror.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
filedoalloc.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
fileno.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
fileops.c
[BZ 1190] Make EOF sticky in stdio.
2018-03-13 08:31:56 -04:00
fmemopen.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
fputc_u.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
fputc.c
Remove miscellaneous debris from libio.
2018-02-21 14:39:54 -05:00
fputwc_u.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
fputwc.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
freopen64.c
libio: Flush stream at freopen (BZ#21037)
2018-10-02 10:01:56 -03:00
freopen.c
libio: Flush stream at freopen (BZ#21037)
2018-10-02 10:01:56 -03:00
fseek.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
fseeko64.c
libio: Implement internal function __libc_readline_unlocked
2018-07-06 17:52:54 +02:00
fseeko.c
libio: Implement internal function __libc_readline_unlocked
2018-07-06 17:52:54 +02:00
ftello64.c
libio: Implement internal function __libc_readline_unlocked
2018-07-06 17:52:54 +02:00
ftello.c
libio: Implement internal function __libc_readline_unlocked
2018-07-06 17:52:54 +02:00
fwide.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
fwprintf.c
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2018-01-01 00:32:25 +00:00
fwscanf.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
genops.c
Remove miscellaneous debris from libio.
2018-02-21 14:39:54 -05:00
getc_u.c
Fix -Os getc_unlocked linknamespace, localplt issues (bug 15105, bug 19463).
2018-02-21 18:01:11 +00:00
getc.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
getchar_u.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
getchar.c
Remove miscellaneous debris from libio.
2018-02-21 14:39:54 -05:00
getwc_u.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
getwc.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
getwchar_u.c
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2018-01-01 00:32:25 +00:00
getwchar.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
iofclose.c
Remove _IO_file_flags define.
2018-02-21 14:22:50 -05:00
iofdopen.c
Remove miscellaneous debris from libio.
2018-02-21 14:39:54 -05:00
iofflush_u.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iofflush.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iofgetpos64.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iofgetpos.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iofgets_u.c
Remove _IO_file_flags define.
2018-02-21 14:22:50 -05:00
iofgets.c
Remove _IO_file_flags define.
2018-02-21 14:22:50 -05:00
iofgetws_u.c
Remove _IO_file_flags define.
2018-02-21 14:22:50 -05:00
iofgetws.c
Remove _IO_file_flags define.
2018-02-21 14:22:50 -05:00
iofopen64.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iofopen.c
Remove legacy configuration knobs from libio.
2018-02-21 14:13:21 -05:00
iofopncook.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iofputs_u.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iofputs.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iofputws_u.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iofputws.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iofread_u.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iofread.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iofsetpos64.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iofsetpos.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
ioftell.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iofwide.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iofwrite_u.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iofwrite.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iogetdelim.c
Remove miscellaneous debris from libio.
2018-02-21 14:39:54 -05:00
iogetline.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iogets.c
Remove _IO_file_flags define.
2018-02-21 14:22:50 -05:00
iogetwline.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iolibio.h
hurd: Avoid more libc.so local PLTs
2018-04-03 00:36:33 +00:00
iopadn.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iopopen.c
Remove legacy configuration knobs from libio.
2018-02-21 14:13:21 -05:00
ioputs.c
hurd: Avoid more libc.so local PLTs
2018-04-03 00:36:33 +00:00
ioseekoff.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
ioseekpos.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iosetbuffer.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iosetvbuf.c
Remove _IO_file_flags define.
2018-02-21 14:22:50 -05:00
ioungetc.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
ioungetwc.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iovdprintf.c
Remove legacy configuration knobs from libio.
2018-02-21 14:13:21 -05:00
iovsprintf.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iovsscanf.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iovswscanf.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
iowpadn.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
libc_fatal.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
libio.h
Remove miscellaneous debris from libio.
2018-02-21 14:39:54 -05:00
libioP.h
libio: Avoid ptrdiff_t overflow in IO_validate_vtable
2018-06-20 09:45:19 +02:00
Makefile
libio: Flush stream at freopen (BZ#21037)
2018-10-02 10:01:56 -03:00
memstream.c
libio: Avoid _allocate_buffer, _free_buffer function pointers [BZ #23236]
2018-06-01 10:41:03 +02:00
obprintf.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
oldfileops.c
[BZ 1190] Make EOF sticky in stdio.
2018-03-13 08:31:56 -04:00
oldfmemopen.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
oldiofclose.c
Remove _IO_file_flags define.
2018-02-21 14:22:50 -05:00
oldiofdopen.c
Remove miscellaneous debris from libio.
2018-02-21 14:39:54 -05:00
oldiofgetpos64.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
oldiofgetpos.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
oldiofopen.c
Remove legacy configuration knobs from libio.
2018-02-21 14:13:21 -05:00
oldiofsetpos64.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
oldiofsetpos.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
oldiopopen.c
Remove legacy configuration knobs from libio.
2018-02-21 14:13:21 -05:00
oldpclose.c
Remove miscellaneous debris from libio.
2018-02-21 14:39:54 -05:00
oldstdfiles.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
oldtmpfile.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
pclose.c
Remove miscellaneous debris from libio.
2018-02-21 14:39:54 -05:00
peekc.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
putc_u.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
putc.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
putchar_u.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
putchar.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
putwc_u.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
putwc.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
putwchar_u.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
putwchar.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
readline.c
Fix copyright years in recent commits
2018-07-10 11:03:08 +02:00
rewind.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
setbuf.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
setlinebuf.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
stdfiles.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
stdio.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
stdio.h
Add renameat2 function [BZ #17662]
2018-07-05 19:00:10 +02:00
strfile.h
libio: Avoid _allocate_buffer, _free_buffer function pointers [BZ #23236]
2018-06-01 10:41:03 +02:00
strops.c
libio: Avoid _allocate_buffer, _free_buffer function pointers [BZ #23236]
2018-06-01 10:41:03 +02:00
swprintf.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
swscanf.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
test-fmemopen.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
test-freopen.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
test-freopen.sh
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
tst_getwc.c
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2018-01-01 00:32:25 +00:00
tst_getwc.input
…
tst_putwc.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
tst_swprintf.c
…
tst_swscanf.c
…
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
…
tst_wscanf.c
…
tst_wscanf.input
…
tst-atime.c
Fix libio/tst-atime not to presume ST_NOATIME exists.
2015-02-06 12:24:16 -08:00
tst-bz22415.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
tst-eof.c
…
tst-ext2.c
…
tst-ext.c
…
tst-fgetc-after-eof.c
[BZ 1190] Make EOF sticky in stdio.
2018-03-13 08:31:56 -04:00
tst-fgetwc.c
…
tst-fgetwc.input
…
tst-fgetws.c
…
tst-fopenloc2.c
…
tst-fopenloc.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
tst-fputws.c
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2018-01-01 00:32:25 +00:00
tst-freopen.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
tst-fseek.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
tst-ftell-active-handler.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
tst-ftell-append.c
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2018-01-01 00:32:25 +00:00
tst-ftell-partial-wide.c
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2018-01-01 00:32:25 +00:00
tst-fwrite-error.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
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
libio: Rename _FWRITE to FWRITE_FUNC
2018-01-29 23:00:17 +01:00
tst-memstream4.c
libio: Flush stream at freopen (BZ#21037)
2018-10-02 10:01:56 -03:00
tst-memstream.h
libio: Flush stream at freopen (BZ#21037)
2018-10-02 10:01:56 -03:00
tst-mmap2-eofsync.c
2016-06-11 Paul Pluzhnikov <ppluzhnikov@google.com>
2016-06-11 14:50:16 -07:00
tst-mmap-eofsync.c
Remove miscellaneous debris from libio.
2018-02-21 14:39:54 -05:00
tst-mmap-fflushsync.c
…
tst-mmap-offend.c
…
tst-mmap-setvbuf.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
tst-popen1.c
…
tst-readline.c
Fix copyright years in recent commits
2018-07-10 11:03:08 +02:00
tst-setvbuf1.c
…
tst-sscanf.c
…
tst-swscanf.c
…
tst-ungetwc1.c
…
tst-ungetwc2.c
…
tst-vtables-common.c
libio: Add tst-vtables, tst-vtables-interposed
2018-06-26 12:31:08 +02:00
tst-vtables-interposed.c
libio: Add tst-vtables, tst-vtables-interposed
2018-06-26 12:31:08 +02:00
tst-vtables.c
libio: Add tst-vtables, tst-vtables-interposed
2018-06-26 12:31:08 +02:00
tst-widetext.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
tst-widetext.input
Finish change from “Bengali” to “Bangla”
2017-09-09 12:41:54 +02:00
tst-wmemstream1.c
…
tst-wmemstream2.c
…
tst-wmemstream3.c
libio: Rename _FWRITE to FWRITE_FUNC
2018-01-29 23:00:17 +01:00
tst-wmemstream4.c
libio: Flush stream at freopen (BZ#21037)
2018-10-02 10:01:56 -03:00
vasprintf.c
libio: Avoid _allocate_buffer, _free_buffer function pointers [BZ #23236]
2018-06-01 10:41:03 +02:00
Versions
libio: Implement internal function __libc_readline_unlocked
2018-07-06 17:52:54 +02:00
vscanf.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
vsnprintf.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
vswprintf.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
vtables.c
libio: Disable vtable validation in case of interposition [BZ #23313]
2018-06-26 10:24:52 +02:00
vwprintf.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
vwscanf.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
wfiledoalloc.c
Mechanically remove _IO_ name aliases for types and constants.
2018-02-21 14:11:05 -05:00
wfileops.c
[BZ 1190] Make EOF sticky in stdio.
2018-03-13 08:31:56 -04:00
wgenops.c
Remove miscellaneous debris from libio.
2018-02-21 14:39:54 -05:00
wmemstream.c
libio: Avoid _allocate_buffer, _free_buffer function pointers [BZ #23236]
2018-06-01 10:41:03 +02:00
wprintf.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
wscanf.c
Update copyright dates with scripts/update-copyrights.
2018-01-01 00:32:25 +00:00
wstrops.c
libio: Avoid _allocate_buffer, _free_buffer function pointers [BZ #23236]
2018-06-01 10:41:03 +02:00