Adhemerval Zanella
f1a67a2c78
libio: Avoid dup already opened file descriptor [BZ#21393]
...
As described in BZ#21398 (close as dup of 21393) report current
freopen implementation fails when one tries to freopen STDIN_FILENO,
STDOUT_FILENO, or STDERR_FILENO. Although on bug report the
discussion leads to argue if a close followed by a freopen on the
standard file is a valid operation, the underlying issue is not
really the check for dup3 returned value, but rather calling it
if the returned file descriptor is equal as the input one.
So for a quality of implementation this patch avoid calling dup3
for the aforementioned case. It also adds a dup3 error case check
for the two possible failures, with one being Linux only: EINTR and
EBUSY. The EBUSY issue is better explained on this stackoverflow
thread [1], but in a short it is due the internal Linux
implementation which allows a race condition window for dup2 due
the logic dissociation of file descriptor allocation and actual
VFS 'install' operation. For both outliers failures all allocated
memory is freed and a NULL FILE* is returned.
With this patch the example on BZ#21398 is now actually possible
(I used as the testcase for the bug report). Checked on
x86_64-linux-gnu.
[BZ #21393 ]
* libio/freopen.c (freopen): Avoid dup already opened file descriptor
and add a check for dup3 failure.
* libio/freopen64.c (freopen64): Likewise.
* libio/tst-freopen.c (do_test): Rename to do_test_basic and use
libsupport.
(do_test_bz21398): New test.
* manual/stdio.texi (freopen): Add documentation of EBUSY failure.
[1] http://stackoverflow.com/questions/23440216/race-condition-when-using-dup2
2017-05-22 18:13:35 -03:00
Joseph Myers
bfff8b1bec
Update copyright dates with scripts/update-copyrights.
2017-01-01 00:14:16 +00:00
Joseph Myers
f7a9f785e5
Update copyright dates with scripts/update-copyrights.
2016-01-04 16:05:18 +00:00
Joseph Myers
b168057aaa
Update copyright dates with scripts/update-copyrights.
2015-01-02 16:29:47 +00:00
Arjun Shankar
29955b5d96
Modify several tests to use test-skeleton.c
...
This patch modifies several test cases to use test-skeleton.c.
It was generated by a bash script written for this purpose and
thus excludes several other tests which I deemed worth a visual
inspection before making the change.
I intend to follow up with individual patches to the tests
skipped by the script.
The script itself resides at http://git.io/WODAmg and should
reproduce this very patch when run against master.
ChangeLog:
2014-10-30 Arjun Shankar <arjun.is@lostca.se>
* catgets/test-gencat.c: Use test-skeleton.c.
* catgets/tst-catgets.c: Likewise.
* csu/tst-empty.c: Likewise.
* elf/tst-audit2.c: Likewise.
* elf/tst-global1.c: Likewise.
* elf/tst-pathopt.c: Likewise.
* elf/tst-piemod1.c: Likewise.
* elf/tst-tls10.c: Likewise.
* elf/tst-tls11.c: Likewise.
* elf/tst-tls12.c: Likewise.
* gnulib/tst-gcc.c: Likewise.
* iconvdata/tst-e2big.c: Likewise.
* iconvdata/tst-loading.c: Likewise.
* iconv/tst-iconv1.c: Likewise.
* iconv/tst-iconv2.c: Likewise.
* inet/test-inet6_opt.c: Likewise.
* inet/tst-gethnm.c: Likewise.
* inet/tst-network.c: Likewise.
* inet/tst-ntoa.c: Likewise.
* intl/tst-codeset.c: Likewise.
* intl/tst-gettext2.c: Likewise.
* intl/tst-gettext3.c: Likewise.
* intl/tst-ngettext.c: Likewise.
* intl/tst-translit.c: Likewise.
* io/test-stat.c: Likewise.
* libio/test-fmemopen.c: Likewise.
* libio/tst-freopen.c: Likewise.
* libio/tst-sscanf.c: Likewise.
* libio/tst-ungetwc1.c: Likewise.
* libio/tst-ungetwc2.c: Likewise.
* libio/tst-widetext.c: Likewise.
* localedata/tst-ctype.c: Likewise.
* localedata/tst-digits.c: Likewise.
* localedata/tst-leaks.c: Likewise.
* localedata/tst-mbswcs1.c: Likewise.
* localedata/tst-mbswcs2.c: Likewise.
* localedata/tst-mbswcs3.c: Likewise.
* localedata/tst-mbswcs4.c: Likewise.
* localedata/tst-mbswcs5.c: Likewise.
* localedata/tst-setlocale.c: Likewise.
* localedata/tst-trans.c: Likewise.
* localedata/tst-wctype.c: Likewise.
* localedata/tst-xlocale1.c: Likewise.
* login/tst-grantpt.c: Likewise.
* malloc/tst-calloc.c: Likewise.
* malloc/tst-malloc.c: Likewise.
* malloc/tst-mallocstate.c: Likewise.
* malloc/tst-mcheck.c: Likewise.
* malloc/tst-mtrace.c: Likewise.
* malloc/tst-obstack.c: Likewise.
* math/atest-exp2.c: Likewise.
* math/atest-exp.c: Likewise.
* math/atest-sincos.c: Likewise.
* math/test-matherr.c: Likewise.
* math/test-misc.c: Likewise.
* math/test-powl.c: Likewise.
* math/tst-definitions.c: Likewise.
* misc/tst-dirname.c: Likewise.
* misc/tst-efgcvt.c: Likewise.
* misc/tst-fdset.c: Likewise.
* misc/tst-hsearch.c: Likewise.
* misc/tst-mntent2.c: Likewise.
* nptl/tst-sem7.c: Likewise.
* nptl/tst-sem8.c: Likewise.
* nptl/tst-sem9.c: Likewise.
* nss/test-netdb.c: Likewise.
* posix/tst-fnmatch.c: Likewise.
* posix/tst-getlogin.c: Likewise.
* posix/tst-gnuglob.c: Likewise.
* posix/tst-mmap.c: Likewise.
* pwd/tst-getpw.c: Likewise.
* resolv/tst-inet_ntop.c: Likewise.
* rt/tst-timer.c: Likewise.
* stdio-common/test-fseek.c: Likewise.
* stdio-common/test-popen.c: Likewise.
* stdio-common/test-vfprintf.c: Likewise.
* stdio-common/tst-cookie.c: Likewise.
* stdio-common/tst-fileno.c: Likewise.
* stdio-common/tst-gets.c: Likewise.
* stdio-common/tst-obprintf.c: Likewise.
* stdio-common/tst-perror.c: Likewise.
* stdio-common/tst-sprintf2.c: Likewise.
* stdio-common/tst-sprintf3.c: Likewise.
* stdio-common/tst-sprintf.c: Likewise.
* stdio-common/tst-swprintf.c: Likewise.
* stdio-common/tst-tmpnam.c: Likewise.
* stdio-common/tst-unbputc.c: Likewise.
* stdio-common/tst-wc-printf.c: Likewise.
* stdlib/tst-environ.c: Likewise.
* stdlib/tst-fmtmsg.c: Likewise.
* stdlib/tst-limits.c: Likewise.
* stdlib/tst-rand48-2.c: Likewise.
* stdlib/tst-rand48.c: Likewise.
* stdlib/tst-random2.c: Likewise.
* stdlib/tst-random.c: Likewise.
* stdlib/tst-strtol.c: Likewise.
* stdlib/tst-strtoll.c: Likewise.
* stdlib/tst-tls-atexit.c: Likewise.
* stdlib/tst-xpg-basename.c: Likewise.
* string/test-ffs.c: Likewise.
* string/tst-bswap.c: Likewise.
* string/tst-inlcall.c: Likewise.
* string/tst-strtok.c: Likewise.
* string/tst-strxfrm.c: Likewise.
* sysdeps/x86_64/tst-audit10.c: Likewise.
* sysdeps/x86_64/tst-audit3.c: Likewise.
* sysdeps/x86_64/tst-audit4.c: Likewise.
* sysdeps/x86_64/tst-audit5.c: Likewise.
* time/tst-ftime_l.c: Likewise.
* time/tst-getdate.c: Likewise.
* time/tst-mktime3.c: Likewise.
* time/tst-mktime.c: Likewise.
* time/tst-posixtz.c: Likewise.
* time/tst-strptime2.c: Likewise.
* time/tst-strptime3.c: Likewise.
* wcsmbs/tst-btowc.c: Likewise.
* wcsmbs/tst-mbrtowc.c: Likewise.
* wcsmbs/tst-mbsrtowcs.c: Likewise.
* wcsmbs/tst-wchar-h.c: Likewise.
* wcsmbs/tst-wcpncpy.c: Likewise.
* wcsmbs/tst-wcrtomb.c: Likewise.
* wcsmbs/tst-wcsnlen.c: Likewise.
* wcsmbs/tst-wcstof.c: Likewise.
2014-11-05 15:24:08 +05:30
Allan McRae
d4697bc93d
Update copyright notices with scripts/update-copyrights
2014-01-01 22:00:23 +10:00
Joseph Myers
568035b787
Update copyright notices with scripts/update-copyrights.
2013-01-02 19:05:09 +00:00
Paul Eggert
59ba27a63a
Replace FSF snail mail address with URLs.
2012-02-09 23:18:22 +00:00
Ulrich Drepper
6d497bbef7
Update.
...
* libio/tst-freopen.c (main): Use correct formats for __LINE__.
* libio/tst-mmap-setvbuf.c (main): Likewise.
* libio/tst-widetext.c (main): Likewise.
* libio/tst-mmap-eofsync.c (do_test): Use correct format in error
message.
* libio/tst-mmap-fflushsync.c (do_test): Likewise.
* libio/tst-mmap2-eofsync.c (do_test): Likewise.
2002-08-25 08:44:43 +00:00
Ulrich Drepper
78ce5a3bbb
Update.
...
2002-07-24 Ulrich Drepper <drepper@redhat.com>
* libio/fileops.c (_IO_file_seekoff_mmap): Do use fp->_offset to
compute current position.
* stdio-common/tst-fseek.c (main): Improve error messages.
* libio/tst-freopen.c (main): Remove unused variable.
* libio/fileops.c (_IO_file_seekoff_mmap): Set fp->_offset after
succesful seek call. Simply error checking.
2002-07-25 Jakub Jelinek <jakub@redhat.com>
* config.h.in: Use __ASSEMBLER__ test macro not ASSEMBLER.
* sysdeps/ia64/fpu/libm_support.h: Likewise.
2002-07-25 01:30:57 +00:00
Ulrich Drepper
81c64d407c
Update.
...
2002-07-10 Ulrich Drepper <drepper@redhat.com>
* Versions.def [libpthread]: Add GLIBC_2.2.6.
* posix/Versions [libc] (GLIBC_2.2.6): Add __nanosleep.
2002-07-06 Bruno Haible <bruno@clisp.org>
* sysdeps/unix/sysv/sysv4/bits/sigset.h (__NSSBITS): Correct value.
* sysdeps/unix/sysv/linux/bits/statvfs.h (ST_NODIRATIME): Set to 2048.
2002-07-10 23:09:16 +00:00
