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This patch synchronizes the glibc fts implementation with the latest
version from gnulib (as of 2026-02-16).
The primary motivation is to address limitations in the legacy glibc
implementation, most notably BZ 22944, where fts fails with an
ENAMETOOLONG error when traversing very long paths or deeply nested
directory trees. The gnulib implementation dynamically reallocates
path buffers and uses openat/fchdir optimizations, effectively
lifting the MAXPATHLEN limitation.
The gnulib implementation also added extra features, which are
used by different GNU projects (coreutils, diffutils):
* FTS_TIGHT_CYCLE_CHECK: used to enable a strict, immediate
cycle-detection algorithm during a file system traversal. This is
done internally using a hash table: every time the traversal enters
a directory, it records the directory's device and inode (dev/ino)
pair in the hash table, and before entering any directory, fts
checks the hash table.
* FTS_CWDFD: instead of actually changing the process's current
working directory, it maintains a virtual current working directory
using file descriptors. The file descriptor is store at the
fts_cwd_fd field and all subsequent file operations are performed
relative to this file descriptor using *at functions.
* FTS_DEFER_STAT: performance-oriented flag that instructs the file
tree traversal engine to delay fetching file metadata. When the
flag is used, fts skips the immediate stat call. Instead, it marks
the entry with a special internal state (FTS_NSOK and
FTS_STAT_REQUIRED). The actual stat call is pushed down the line
and executed by fts_read right before the application actually
accesses the entry.
* FTS_VERBATIM: fts_open accept and use the path strings exactly as
they were provided in the arguments array without slash trimming.
* FTS_MOUNT: it restrict the file tree walk to a single file system.
Hopefully,it would allow some GNU projects to use the glibc
implementation instead of pulling the gnulib one.
It requires some changes to keep compatibility, compared to gnulib:
* The new required fields are added at the end of FTS structure, and
the new FTS flags are adjusted to avoid change FTS_NAMEONLY/FTS_STOP
(even though they are marked as private).
* The FTSENT uses a flexible array (fts_name), so two adjustments are
required: the two new members (fts_fts and fts_dirp) are place
*before* the struct and the fts_statp is now always allocated and
accounted (the gnulib implementation uses an alwyas allocated member).
Checked on x86_64-linux-gnu and i686-linux-gnu.
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Clang issues a warning for double alias redirection, indicating that thei
original symbol is used even if a weak definition attempts to override it.
For instance, in the construction:
int __internal_impl (...) {}
weak_alias (__internal_impl, external_impl);
#if SOMETHING
weak_alias (external_impl, another_external_impl)
#endif
Clang warns that another_external_impl always resolves to __internal_impl,
even if external_impl is a weak reference. Using the internal symbol for
both aliases resolves this warning.
This issue also occurs with certain libc_hidden_def usage:
int __internal_impl (...) {}
weak_alias (__internal_impl, __internal_alias)
libc_hidden_weak (__internal_alias)
In this case, using a strong_alias is sufficient to avoid the warning
(since the alias is internal, there is no need to use a weak alias).
However, for the constructions like:
int __internal_impl (...) {}
weak_alias (__internal_impl, __internal_alias)
libc_hidden_def (__internal_alias)
weak_alias (__internal_impl, external_alias)
libc_hidden_def (external_alias)
Clang warns that the internal external_alias will always resolve to
__GI___internal_impl, even if a weak definition of __GI_internal_impl is
overridden. For this case, a new macro named static_weak_alias is used
to create a strong alias for SHARED, or a weak_alias otherwise.
With these changes, there is no need to check and enable the
-Wno-ignored-attributes suppression when using clang.
Checked with a build on affected ABIs, and a full check on aarch64,
armhf, i686, and x86_64.
Reviewed-by: Sam James <sam@gentoo.org>
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Fix variables in Makefiles:
1. There is a tab, not a space, between "variable" and =, +=, :=.
2. The last entry doesn't have a trailing \.
and sort them.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
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The barrier functions require this on Hurd.
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The tests check that O_EXCL is used properly, that 0600 is used
as the mode, that the characters used are as expected, and that
the distribution of names generated is reasonably random.
The tests run very slowly on some kernel versions, so make them
xtests.
Reviewed-by: DJ Delorie <dj@redhat.com>
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Add tests for MREMAP_MAYMOVE and MREMAP_FIXED. On Linux, also test
MREMAP_DONTUNMAP.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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The conditionals for several mtrace-based tests in catgets, elf, libio,
malloc, misc, nptl, posix, and stdio-common were incorrect leading to
test failures when bootstrapping glibc without perl.
The correct conditional for mtrace-based tests requires three checks:
first checking for run-built-tests, then build-shared, and lastly that
PERL is not equal to "no" (missing perl).
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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__vsyslog_internal did not handle a case where printing a SYSLOG_HEADER
containing a long program name failed to update the required buffer
size, leading to the allocation and overflow of a too-small buffer on
the heap. This commit fixes that. It also adds a new regression test
that uses glibc.malloc.check.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
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This allows to include bits/syslog-decl.h in include/sys/syslog.h and
therefore be able to create the libc_hidden_builtin_proto (__syslog_chk)
prototype.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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The __fdelt_chk declaration needs to be available so that
libc_hidden_proto can be used while not redefining __FD_ELT.
Thus, misc/bits/select-decl.h is created to hold the corresponding
prototypes.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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Since the _FORTIFY_SOURCE feature uses some routines of Glibc, they need to
be excluded from the fortification.
On top of that:
- some tests explicitly verify that some level of fortification works
appropriately, we therefore shouldn't modify the level set for them.
- some objects need to be build with optimization disabled, which
prevents _FORTIFY_SOURCE to be used for them.
Assembler files that implement architecture specific versions of the
fortified routines were not excluded from _FORTIFY_SOURCE as there is no
C header included that would impact their behavior.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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Reflow Makefile.
Sort using updated scripts/sort-makefile-lines.py.
Code generation is changed as routines are linked in sorted order
as expected.
No regressions on x86_64 and i686.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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Reflow Makefile.
Sort using scripts/sort-makefile-lines.py.
Code generation is changed as routines are linked in sorted order
as expected.
No regressions on x86_64 and i686.
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This patch redirects the error functions to the appropriate
longdouble variants which enables the compiler to optimize
for the abi ieeelongdouble.
Signed-off-by: Sachin Monga <smonga@linux.ibm.com>
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clang emits an warning when a double alias redirection is used, to warn
the the original symbol will be used even when weak definition is
overridden. However, this is a common pattern for weak_alias, where
multiple alias are set to same symbol.
Reviewed-by: Fangrui Song <maskray@google.com>
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The test cover:
- All possible priorities and facilities through TCP and UDP.
- Same syslog tests for vsyslog.
- Some openlog/syslog/close combinations.
- openlog with LOG_CONS, LOG_PERROR, and LOG_PID.
Internally is done with a test-container where the main process mimics
the syslog server interface.
The test does not cover multithread and async-signal usage.
Checked on x86_64-linux-gnu.
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I used these shell commands:
../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")
and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 7061 files FOO.
I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah. I don't
know why I run into these diagnostics whereas others evidently do not.
remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
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Starting with commit b05fae4d8e34604a72ee36d2d3164391b76fcf0b
"elf: Use the minimal malloc on tunables_strdup",
I get lots of segfaults in static tests on s390x when also using, e.g.:
export GLIBC_TUNABLES="glibc.elision.enable=1"
tunables_strdup callls __minimal_malloc which tries to call __mmap
due to insufficient space left. __mmap itself first setups a new
stack frame and segfaults when copying the stack-protector canary
from thread-pointer. The latter one is not yet setup.
Thus this patch also turns off stack-protection for mmap.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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And make it an installed header. This addresses a few aliasing
violations (which do not seem to result in miscompilation due to
the use of atomics), and also enables use of wide counters in other
parts of the library.
The debug output in nptl/tst-cond22 has been adjusted to print
the 32-bit values instead because it avoids a big-endian/little-endian
difference.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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Remove all malloc hook uses from core malloc functions and move it
into a new library libc_malloc_debug.so. With this, the hooks now no
longer have any effect on the core library.
libc_malloc_debug.so is a malloc interposer that needs to be preloaded
to get hooks functionality back so that the debugging features that
depend on the hooks, i.e. malloc-check, mcheck and mtrace work again.
Without the preloaded DSO these debugging features will be nops.
These features will be ported away from hooks in subsequent patches.
Similarly, legacy applications that need hooks functionality need to
preload libc_malloc_debug.so.
The symbols exported by libc_malloc_debug.so are maintained at exactly
the same version as libc.so.
Finally, static binaries will no longer be able to use malloc
debugging features since they cannot preload the debugging DSO.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
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Reviewed-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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librt.so is no longer installed for PTHREAD_IN_LIBC, and tests
are not linked against it. $(librt) is introduced globally for
shared tests that need to be linked for both PTHREAD_IN_LIBC
and !PTHREAD_IN_LIBC.
GLIBC_PRIVATE symbols that were needed during the transition are
removed again.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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For !__ASSUME_TIME64_SYSCALLS there is no need to issue a 64-bit syscall
if the provided timeout fits in a 32-bit one. The 64-bit usage should
be rare since the timeout is a relative one. This also avoids the need
to use supports_time64() (which breaks the usage case of live migration
like CRIU or similar).
It also fixes an issue on 32-bit select call for !__ASSUME_PSELECT
(microblase with older kernels only) where the expected timeout
is a 'struct timeval' instead of 'struct timespec'.
Checked on i686-linux-gnu on a 4.15 kernel and on a 5.11 kernel
(with and without --enable-kernel=5.1) and on x86_64-linux-gnu.
Reviewed-by: Lukasz Majewski <lukma@denx.de>
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For !__ASSUME_TIME64_SYSCALLS there is no need to issue a 64-bit syscall
if the provided timeout fits in a 32-bit one. The 64-bit usage should
be rare since the timeout is a relative one. This also avoids the need
to use supports_time64() (which breaks the usage case of live migration
like CRIU or similar).
Checked on i686-linux-gnu on a 4.15 kernel and on a 5.11 kernel
(with and without --enable-kernel=5.1) and on x86_64-linux-gnu.
Reviewed-by: Lukasz Majewski <lukma@denx.de>
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It is enabled through a new rule, tests-y2038, which is built only
when the ABI supports the comapt 64-bit time_t (defined by the
header time64-compat.h, which also enables the creation of the
symbol Version for Linux). It means the tests are not built
for ABI which already provide default 64-bit time_t.
The new rule already adds the required LFS and 64-bit time_t
compiler flags.
The current coverage is:
* libc:
- adjtime tst-adjtime-time64
- adjtimex tst-adjtimex-time64
- clock_adjtime tst-clock_adjtime-time64
- clock_getres tst-clock-time64, tst-cpuclock1-time64
- clock_gettime tst-clock-time64, tst-clock2-time64,
tst-cpuclock1-time64
- clock_nanosleep tst-clock_nanosleep-time64,
tst-cpuclock1-time64
- clock_settime tst-clock2-time64
- cnd_timedwait tst-cnd-timedwait-time64
- ctime tst-ctime-time64
- ctime_r tst-ctime-time64
- difftime tst-difftime-time64
- fstat tst-stat-time64
- fstatat tst-stat-time64
- futimens tst-futimens-time64
- futimes tst-futimes-time64
- futimesat tst-futimesat-time64
- fts_* tst-fts-time64
- getitimer tst-itimer-timer64
- getrusage
- gettimeofday tst-clock_nanosleep-time64
- glob / globfree tst-gnuglob64-time64
- gmtime tst-gmtime-time64
- gmtime_r tst-gmtime-time64
- lstat tst-stat-time64
- localtime tst-y2039-time64
- localtime_t tst-y2039-time64
- lutimes tst-lutimes-time64
- mktime tst-mktime4-time64
- mq_timedreceive tst-mqueue{1248}-time64
- mq_timedsend tst-mqueue{1248}-time64
- msgctl test-sysvmsg-time64
- mtx_timedlock tst-mtx-timedlock-time64
- nanosleep tst-cpuclock{12}-time64,
tst-mqueue8-time64, tst-clock-time64
- nftw / ftw ftwtest-time64
- ntp_adjtime tst-ntp_adjtime-time64
- ntp_gettime tst-ntp_gettime-time64
- ntp_gettimex tst-ntp_gettimex-time64
- ppoll tst-ppoll-time64
- pselect tst-pselect-time64
- pthread_clockjoin_np tst-join14-time64
- pthread_cond_clockwait tst-cond11-time64
- pthread_cond_timedwait tst-abstime-time64
- pthread_mutex_clocklock tst-abstime-time64
- pthread_mutex_timedlock tst-abstime-time64
- pthread_rwlock_clockrdlock tst-abstime-time64, tst-rwlock14-time64
- pthread_rwlock_clockwrlock tst-abstime-time64, tst-rwlock14-time64
- pthread_rwlock_timedrdlock tst-abstime-time64, tst-rwlock14-time64
- pthread_rwlock_timedwrlock tst-abstime-time64, tst-rwlock14-time64
- pthread_timedjoin_np tst-join14-time64
- recvmmsg tst-cancel4_2-time64
- sched_rr_get_interval tst-sched_rr_get_interval-time64
- select tst-select-time64
- sem_clockwait tst-sem5-time64
- sem_timedwait tst-sem5-time64
- semctl test-sysvsem-time64
- semtimedop test-sysvsem-time64
- setitimer tst-mqueue2-time64, tst-itimer-timer64
- settimeofday tst-settimeofday-time64
- shmctl test-sysvshm-time64
- sigtimedwait tst-sigtimedwait-time64
- stat tst-stat-time64
- thrd_sleep tst-thrd-sleep-time64
- time tst-mqueue{1248}-time64
- timegm tst-timegm-time64
- timer_gettime tst-timer4-time64
- timer_settime tst-timer4-time64
- timerfd_gettime tst-timerfd-time64
- timerfd_settime tst-timerfd-time64
- timespec_get tst-timespec_get-time64
- timespec_getres tst-timespec_getres-time64
- utime tst-utime-time64
- utimensat tst-utimensat-time64
- utimes tst-utimes-time64
- wait3 tst-wait3-time64
- wait4 tst-wait4-time64
* librt:
- aio_suspend tst-aio6-time64
- mq_timedreceive tst-mqueue{1248}-time64
- mq_timedsend tst-mqueue{1248}-time64
- timer_gettime tst-timer4-time64
- timer_settime tst-timer4-time64
* libanl:
- gai_suspend
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
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This commit removes the ELF constructor and internal variables from
dlfcn/dlfcn.c. The file now serves the same purpose as
nptl/libpthread-compat.c, so it is renamed to dlfcn/libdl-compat.c.
The use of libdl-shared-only-routines ensures that libdl.a is empty.
This commit adjusts the test suite not to use $(libdl). The libdl.so
symbolic link is no longer installed.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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This change adds new test to assess select()'s timeout related
functionality (the rdfs set provides valid fd - stderr - but during
normal program operation there is no data to be read, so one just
waits for timeout).
To be more specific - two use cases are checked:
- if select() times out immediately when passed struct timeval has
zero values of tv_usec and tv_sec.
- if select() times out after timeout specified in passed argument
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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This will be used to consolidate the libgcc_s access for backtrace
and pthread_cancel.
Unlike the existing backtrace implementations, it provides some
hardening based on pointer mangling.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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I used these shell commands:
../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")
and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master
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The addmntent function replicates elements of struct mnt on stack
using alloca, which is unsafe. Put characters directly into the
stream, escaping them as they're being written out.
Also add a test to check all escaped characters with addmntent and
getmntent.
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The variable is placed in libc.so, and it can be true only in
an outer libc, not libcs loaded via dlmopen or static dlopen.
Since thread creation from inner namespaces does not work,
pthread_create can update __libc_single_threaded directly.
Using __libc_early_init and its initial flag, implementation of this
variable is very straightforward. A future version may reset the flag
during fork (but not in an inner namespace), or after joining all
threads except one.
Reviewed-by: DJ Delorie <dj@redhat.com>
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Add a test to pass 64-bit long arguments to syscall with undefined upper
32 bits on x32.
Tested on i386, x86-64 and x32 as well as with build-many-glibcs.py.
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The new type struct fd_to_filename makes the allocation of the
backing storage explicit.
Hurd uses /dev/fd, not /proc/self/fd.
Co-Authored-By: Paul Eggert <eggert@cs.ucla.edu>
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Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
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On platforms where long double may have the same format as double
(-mlong-double-64), error and error_at_line do not take that into
account and might produce wrong output if a long double conversion is
requested by the format string ('%Lf'). This patch adds compatibility
functions for this situation and redirects calls via header magic.
Tested for powerpc, powerpc64 and powerpc64le.
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When support for long double format with 128-bits (-mlong-double-128)
was added for platforms where long double had the same format as double,
such as powerpc, compatibility versions for the functions listed in the
commit title were missed. Since the older format of long double can
still be used (with -mlong-double-64), using these functions with a
format string that requests the printing of long double variables will
produce wrong outputs.
This patch adds the missing compatibility functions and header magic to
redirect calls to them when -mlong-double-64 is in use.
Tested for powerpc, powerpc64 and powerpc64le.
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* All files with FSF copyright notices: Update copyright dates
using scripts/update-copyrights.
* locale/programs/charmap-kw.h: Regenerated.
* locale/programs/locfile-kw.h: Likewise.
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The test case misc/tst-efgcvt.c only tests the double variants of the
Old-fashioned System V number-to-string functions: ecvt, fcvt, and their
re-entrant counterparts. With a few macros, the code can be reused for
the long double versions of these functions. A future patch will reuse
it again for IEEE long double on powerpc64le.
Tested for powerpc and powerpc64le.
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Similarly to what has been done for argp_error, and argp_failure, as
well as for warn, warnx, vwarn, and vwarnx, this patch adds new tests
for the following functions: err, errx, verr, verrx, error, and
error_at_line. The new tests check that the conversion of long double
variables into string works correctly on the default format of the type.
Future patches will reuse these tests for other formats that long double
can take.
Tested for powerpc64le.
* misc/Makefile (tests): Add tst-ldbl-error.
* misc/tst-ldbl-error.c: New file.
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Similarly to what has been done for argp_error and argp_failure, this
patch patch adds new tests for the warn, warnx, vwarn, and vwarnx
functions. The new tests use the format string to request the
conversion of long double parameters into string. Currently, these
tests only check that the default format of the long double type works.
Future patches will extend the test for platforms that can have an
optional format for long double.
Tested for powerpc64le.
* misc/Makefile (tests): Add tst-ldbl-warn.
* misc/tst-ldbl-warn.c: New file.
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The empty /etc/hosts file used to trigger bug 23679.
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Also introduce the __vfxprintf function.
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As for sysctl, ustat has been deprecated in favor of {f}statfs. Also
some newer ports which uses generic interface builds a stub version that
returns ENOSYS.
This patch deprecates ustat interface by removing ustat.h related headers,
adding a compatibility symbol, and avoiding new ports to build and provide
the symbol.
Checked on x86_64-linux-gnu and i686-linux-gnu. Also checked with a
check-abi on all affected ABIs.
* NEWS: Add ustat.h deprecation entry.
* bits/ustat.h: Remove file.
* misc/sys/ustat.h: Likewise.
* misc/ustat.h: Likewise.
* sysdeps/unix/sysv/linux/generic/ustat.c: Likewise.
* misc/Makefile (headers): Remove ustat.h and sys/ustat.h.
* misc/ustat.c (__ustat): Rename to __old_ustat and export only in
compatibility mode.
* sysdeps/unix/sysv/linux/ustat.c (__ustat): Likewise.
* sysdeps/unix/sysv/linux/mips/ustat.c: Define DEV_TO_KDEV and use
generic Linux implementation.
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