| Commit message (Collapse) | Author | Age | Files | Lines |
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The nscd parent process returns the result of a `wait' call rather
than the exit status of the child it waits for. These two aren't
exactly the same. In my case (and probably on most machines), the exit
status is in the 2nd LSB of the result of `wait', and so:
e.g. if the nscd child process returns 1, the parent returns 1 << 8,
which Bash happily reports as 0.
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The SEPARATE_KEY macro is never defined in any condition or
architecture. It is effectively dead code, so remove it.
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Now that files using __ASSUME_* macros have been made by
<https://sourceware.org/ml/libc-alpha/2014-06/msg00543.html> to
include <kernel-features.h> directly, any include from a file not
using __ASSUME_* macros can safely be removed (as there will no longer
be some other file relying on indirect inclusion via a header from
which the include is being removed).
This patch removes such unnecessary kernel-features.h includes.
Tested x86_64 that disassembly of installed shared libraries is
unchanged by this patch, except for line numbers in calls to
__assert_fail from libc.so and ld.so.
2014-06-23 Joseph Myers <joseph@codesourcery.com>
* nptl/createthread.c: Don't include kernel-features.h.
* nptl/pthread_cancel.c: Likewise.
* nptl/pthread_condattr_setclock.c: Likewise.
* nptl/sysdeps/unix/sysv/linux/pt-raise.c: Likewise.
* nptl/sysdeps/unix/sysv/linux/pthread_getcpuclockid.c: Likewise.
* nptl/sysdeps/unix/sysv/linux/pthread_kill.c: Likewise.
* nptl/sysdeps/unix/sysv/linux/pthread_sigqueue.c: Likewise.
* nptl/sysdeps/unix/sysv/linux/raise.c: Likewise.
* nptl/sysdeps/unix/sysv/linux/s390/s390-32/pt-vfork.S: Likewise.
* nptl/sysdeps/unix/sysv/linux/s390/s390-32/vfork.S: Likewise.
* nptl/sysdeps/unix/sysv/linux/s390/s390-64/pt-vfork.S: Likewise.
* nptl/sysdeps/unix/sysv/linux/s390/s390-64/vfork.S: Likewise.
* nptl/sysdeps/unix/sysv/linux/timer_create.c: Likewise.
* nptl/sysdeps/unix/sysv/linux/timer_delete.c: Likewise.
* nptl/sysdeps/unix/sysv/linux/timer_getoverr.c: Likewise.
* nptl/sysdeps/unix/sysv/linux/timer_gettime.c: Likewise.
* nptl/sysdeps/unix/sysv/linux/timer_routines.c: Likewise.
* nptl/sysdeps/unix/sysv/linux/timer_settime.c: Likewise.
* nscd/gai.c: Likewise.
* nss/nss_db/db-open.c: Likewise.
* sysdeps/generic/ldsodefs.h: Likewise.
* sysdeps/sh/nptl/tls.h: Likewise.
* sysdeps/unix/sysv/linux/aarch64/sigaction.c: Likewise.
* sysdeps/unix/sysv/linux/aarch64/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/aarch64/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/adjtime.c: Likewise.
* sysdeps/unix/sysv/linux/alpha/xstatconv.h: Likewise.
* sysdeps/unix/sysv/linux/arm/sigaction.c: Likewise.
* sysdeps/unix/sysv/linux/arm/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/check_pf.c: Likewise.
* sysdeps/unix/sysv/linux/clock_getcpuclockid.c: Likewise.
* sysdeps/unix/sysv/linux/clock_getres.c: Likewise.
* sysdeps/unix/sysv/linux/clock_gettime.c: Likewise.
* sysdeps/unix/sysv/linux/clock_nanosleep.c: Likewise.
* sysdeps/unix/sysv/linux/clock_settime.c: Likewise.
* sysdeps/unix/sysv/linux/dl-execstack.c: Likewise.
* sysdeps/unix/sysv/linux/dl-osinfo.h: Likewise.
* sysdeps/unix/sysv/linux/dl-sysdep.c: Likewise.
* sysdeps/unix/sysv/linux/generic/futimesat.c: Likewise.
* sysdeps/unix/sysv/linux/generic/poll.c: Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/fcntl.c: Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c: Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/pread.c: Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/pread64.c: Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/preadv.c: Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/preadv64.c: Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/pwrite.c: Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/pwrite64.c: Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/pwritev.c: Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/pwritev64.c: Likewise.
* sysdeps/unix/sysv/linux/getcwd.c: Likewise.
* sysdeps/unix/sysv/linux/getpagesize.c: Likewise.
* sysdeps/unix/sysv/linux/getsysstats.c: Likewise.
* sysdeps/unix/sysv/linux/i386/fxstat.c: Likewise.
* sysdeps/unix/sysv/linux/i386/lxstat.c: Likewise.
* sysdeps/unix/sysv/linux/i386/mmap.S: Likewise.
* sysdeps/unix/sysv/linux/i386/mmap64.S: Likewise.
* sysdeps/unix/sysv/linux/i386/sigaction.c: Likewise.
* sysdeps/unix/sysv/linux/i386/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/i386/xstat.c: Likewise.
* sysdeps/unix/sysv/linux/ia64/system.c: Likewise.
* sysdeps/unix/sysv/linux/if_index.c: Likewise.
* sysdeps/unix/sysv/linux/ifaddrs.c: Likewise.
* sysdeps/unix/sysv/linux/ifreq.c: Likewise.
* sysdeps/unix/sysv/linux/ldsodefs.h: Likewise.
* sysdeps/unix/sysv/linux/lutimes.c: Likewise.
* sysdeps/unix/sysv/linux/m68k/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/microblaze/nptl/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/accept4.c: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/recvmmsg.c: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/sendmmsg.c: Likewise.
* sysdeps/unix/sysv/linux/mips/pread.c: Likewise.
* sysdeps/unix/sysv/linux/mips/pread64.c: Likewise.
* sysdeps/unix/sysv/linux/mips/pwrite.c: Likewise.
* sysdeps/unix/sysv/linux/mips/pwrite64.c: Likewise.
* sysdeps/unix/sysv/linux/mips/sigaction.c: Likewise.
* sysdeps/unix/sysv/linux/mmap64.c: Likewise.
* sysdeps/unix/sysv/linux/netlinkaccess.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/chown.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/fe_mask.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/fe_nomask.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext.S: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/pread.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/pread64.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/pwrite.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/pwrite64.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/fpu/fe_mask.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/fpu/fe_nomask.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/pread.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/pread64.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/pwrite.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/pwrite64.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/pread.c: Likewise.
* sysdeps/unix/sysv/linux/pread64.c: Likewise.
* sysdeps/unix/sysv/linux/prof-freq.c: Likewise.
* sysdeps/unix/sysv/linux/pwrite.c: Likewise.
* sysdeps/unix/sysv/linux/pwrite64.c: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/mmap.S: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/mmap64.S: Likewise.
* sysdeps/unix/sysv/linux/s390/system.c: Likewise.
* sysdeps/unix/sysv/linux/sh/pread.c: Likewise.
* sysdeps/unix/sysv/linux/sh/pread64.c: Likewise.
* sysdeps/unix/sysv/linux/sh/pwrite.c: Likewise.
* sysdeps/unix/sysv/linux/sh/pwrite64.c: Likewise.
* sysdeps/unix/sysv/linux/sigaction.c: Likewise.
* sysdeps/unix/sysv/linux/sigpending.c: Likewise.
* sysdeps/unix/sysv/linux/sigprocmask.c: Likewise.
* sysdeps/unix/sysv/linux/sigsuspend.c: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/xstatconv.c: Likewise.
* sysdeps/unix/sysv/linux/sparc/system.c: Likewise.
* sysdeps/unix/sysv/linux/syslog.c: Likewise.
* sysdeps/unix/sysv/linux/system.c: Likewise.
* sysdeps/unix/sysv/linux/testrtsig.h: Likewise.
* sysdeps/unix/sysv/linux/timespec_get.c: Likewise.
* sysdeps/unix/sysv/linux/ttyname.c: Likewise.
* sysdeps/unix/sysv/linux/ttyname_r.c: Likewise.
* sysdeps/unix/sysv/linux/utimensat.c: Likewise.
* sysdeps/unix/sysv/linux/x86_64/sigaction.c: Likewise.
* sysdeps/unix/sysv/linux/xstatconv.h: Likewise.
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The attached patch removed the unused ‘thread_info_t’ typedef and the
‘thread_info’ variable from nscd.c. The former conflicts with a GNU Mach
typedef, and the latter conflicts with a GNU Mach function declaration:
<https://lists.gnu.org/archive/html/bug-hurd/2014-06/msg00101.html>.
Tested on x86_64-linux-gnu.
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This patch makes files using __ASSUME_* macros include
<kernel-features.h> explicitly, rather than relying on some other
header (such as tls.h, lowlevellock.h or pthreadP.h) to include it
implicitly. (I omitted cases where I've already posted or am testing
the patch that stops the file from needing __ASSUME_* at all.) This
accords with the general principle of making source files include the
headers for anything they use, and also helps make it safe to remove
<kernel-features.h> includes from any file that doesn't use
__ASSUME_* (some of those may be stray includes left behind after
increasing the minimum kernel version, others may never have been
needed or may have become obsolete after some other change).
Tested x86_64 that the disassembly of installed shared libraries is
unchanged by this patch.
* nptl/pthread_cond_wait.c: Include <kernel-features.h>.
* nptl/pthread_rwlock_timedrdlock.c: Likewise.
* nptl/pthread_rwlock_timedwrlock.c: Likewise.
* nptl/sysdeps/unix/sysv/linux/lowlevelrobustlock.c: Likewise.
* nscd/nscd.c: Likewise.
* sysdeps/i386/nptl/tcb-offsets.sym: Likewise.
* sysdeps/powerpc/nptl/tcb-offsets.sym: Likewise.
* sysdeps/sh/nptl/tcb-offsets.sym: Likewise.
* sysdeps/x86_64/nptl/tcb-offsets.sym: Likewise.
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The netgroups nss modules in the glibc tree use NSS_STATUS_UNAVAIL
(with errno as ERANGE) when the supplied buffer does not have
sufficient space for the result. This is wrong, because the canonical
way to indicate insufficient buffer is to set the errno to ERANGE and
the status to NSS_STATUS_TRYAGAIN, as is used by all other modules.
This fixes nscd behaviour when the nss_ldap module returns
NSS_STATUS_TRYAGAIN to indicate that a netgroup entry is too long to
fit into the supplied buffer.
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I noticed that some of the Depend files, used to determine the
subdirectory build order in sysd-sorted, still mentioned linuxthreads,
although it hasn't been supported for many years. This patch removes
those references. In the case of nscd, it substitutes an nptl
reference, since I believe there is a fact a thread library dependence
there; the others already mentioned nptl.
Note that I am not at all confident in the completeness of these
Depend files.
Note also that references to linuxthreads remain in a comment in
sysdeps/unix/sysv/linux/ia64/Versions, and in manual/maint.texi,
manual/signal.texi and scripts/documented.sh.
Tested x86_64 that the installed shared libraries are unchanged by the
patch (as is sysd-sorted).
* nscd/Depend (linuxthreads): Remove.
(nptl): Add.
* resolv/Depend (linuxthreads): Remove.
* rt/Depend (linuxthreads): Remove.
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The datahead structure has an unused padding field that remains
uninitialized. Valgrind prints out a warning for it on querying a
netgroups entry. This is harmless, but is a potential data leak since
it would result in writing out an uninitialized byte to the cache
file. Besides, this happens only when there is a cache miss, so we're
not adding computation to any fast path.
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This patch consolidates the code to initialize the header of a dataset
into a single set of functions (one for positive and another for
negative datasets) primarily to reduce repetition of code. The
secondary reason is to simplify Patch 2/2 which fixes the problem of
an uninitialized byte in the header by initializing an unused field in
the structure and hence preventing a possible data leak into the cache
file.
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The SELinux team has indicated to me that glibc's SELinux checks
in nscd are not being carried out as they would expect the API
to be used today. They would like to move away from static header
defines for class and permissions and instead use dynamic checks
at runtime that provide an answer which is dependent on the runtime
status of SELinux i.e. more dynamic.
The following patch is a minimal change that moves us forward in
this direction.
It does the following:
* Stop checking for SELinux headers that define NSCD__SHMEMHOST.
Check only for the presence or absence of the library.
* Don't encode the specific SELinux permission constants into a
table at build time, and instead use the symbolic name for the
permission as expected.
* Lookup the "What do we do if we don't know this permission?"
policy and use that if we find SELinux's policy is older than
the glibc policy e.g. we make a request for a permission that
SELinux doesn't know about.
* Lastly, translate the class and permission and then make
the permission check. This is done every time we lookup
a permission, and this is the expected way to use the API.
SELinux will optimize this for us, and we expect the network
latencies to hide these extra library calls.
Tested on x86, x86-64, and via Fedora Rawhide since November 2013.
See:
https://sourceware.org/ml/libc-alpha/2014-04/msg00179.html
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This patch defines _STRING_ARCH_unaligned to 0 on default bits/string.h
header to avoid undefined compiler warnings on platforms that do not
define it. It also make adjustments in code where tests checked if macro
existed or not.
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Calls to stpcpy from nscd netgroups code will have overlapping source
and destination when all three values in the returned triplet are
non-NULL and in the expected (host,user,domain) order. This is seen
in valgrind as:
==3181== Source and destination overlap in stpcpy(0x19973b48, 0x19973b48)
==3181== at 0x4C2F30A: stpcpy (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==3181== by 0x12567A: addgetnetgrentX (string3.h:111)
==3181== by 0x12722D: addgetnetgrent (netgroupcache.c:665)
==3181== by 0x11114C: nscd_run_worker (connections.c:1338)
==3181== by 0x4E3C102: start_thread (pthread_create.c:309)
==3181== by 0x59B81AC: clone (clone.S:111)
==3181==
Fix this by using memmove instead of stpcpy.
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nscd works correctly when the request in innetgr is a wildcard,
i.e. when one or more of host, user or domain parameters is NULL.
However, it does not work when the the triplet in the netgroup
definition has a wildcard. This is easy to reproduce for a triplet
defined as follows:
foonet (,foo,)
Here, an innetgr call that looks like this:
innetgr ("foonet", "foohost", "foo", NULL);
should succeed and so should:
innetgr ("foonet", NULL, "foo", "foodomain");
It does succeed with nscd disabled, but not with nscd enabled. This
fix adds this additional check for all three parts of the triplet so
that it gives the correct result.
[BZ #16758]
* nscd/netgroupcache.c (addinnetgrX): Succeed if triplet has
blank values.
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The buffer to query netgroup entries is allocated sufficient space for
the netgroup entries and the key to be appended at the end, but it
sends in an incorrect available length to the NSS netgroup query
functions, resulting in overflow of the buffer in some special cases.
The fix here is to factor in the key length when sending the available
buffer and buffer length to the query functions.
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Currently the nscd service is installed in systemd as a simple
service, which means that it is able to handle its own errors and does
not quit. Since nscd does not fit that description, i.e. it can exit
on errors like, say, failing to parse nscd.conf, it should be declared
as forking instead.
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Currently, the nscd parent process parses commandline options and
configuration, forks on startup and immediately exits with a success.
If the child process encounters some error after this, it goes
undetected and any services started up after it may have to repeatedly
check to make sure that the nscd service did actually start up and is
serving requests.
To make this process more reliable, I have added a pipe between the
parent and child process, through which the child process sends a
notification to the parent informing it of its status. The parent
waits for this status and once it receives it, exits with the
corresponding exit code. So if the child service sends a success
status (0), the parent exits with a success status. Similarly for
error conditions, the child sends the non-zero status code, which the
parent passes on as the exit code.
This, along with setting the nscd service type to forking in its
systemd configuration file, allows systemd to be certain that the nscd
service is ready and is accepting connections.
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Using a buffer after it has been reallocated is undefined behaviour,
so get offsets of the triplets in the old buffer before reallocating
it.
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The _nss_*_getnetgrent_r query populates the netgroup results in the
allocated buffer and then sets the result triplet to point to strings
in the buffer. This is a problem when the buffer is reallocated since
the pointers to the triplet strings are no longer valid. The pointers
need to be adjusted so that they now point to strings in the
reallocated buffer.
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addgetnetgrentX has a buffer which is grown as per the needs of the
requested size either by using alloca or by falling back to malloc if
the size is larger than 1K. There are two problems with the alloca
bits: firstly, it doesn't really extend the buffer since it does not
use the return value of the extend_alloca macro, which is the location
of the reallocated buffer. Due to this the buffer does not actually
extend itself and hence a subsequent write may overwrite stuff on the
stack.
The second problem is more subtle - the buffer growth on the stack is
discontinuous due to block scope local variables. Combine that with
the fact that unlike realloc, extend_alloca does not copy over old
content and you have a situation where the buffer just has garbage in
the space where it should have had data.
This could have been fixed by adding code to copy over old data
whenever we call extend_alloca, but it seems unnecessarily
complicated. This code is not exactly a performance hotspot (it's
called when there is a cache miss, so factors like network lookup or
file reads will dominate over memory allocation/reallocation), so this
premature optimization is unnecessary.
Thanks Brad Hubbard <bhubbard@redhat.com> for his help with debugging
the problem.
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Usage output for option --invalidate=TABLE is not helpful without
list of tables. The list is also missing from nscd(8) manual which
made it pretty difficult to know what are the tables.
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nscd incorrectly returns a success even when the netgroup in question
is not found and adds a positive result in the cache. this patch
fixes this behaviour by adding a negative lookup entry to cache and
returning an error when the netgroup is not found.
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Currently, when a user looks up a netgroup that does not have any
members, nscd goes into an infinite loop trying to find members in the
group. This is because it does not handle cases when getnetgrent
returns an NSS_STATUS_NOTFOUND (which is what it does on empty group).
Fixed to handle this in the same way as NSS_STATUS_RETURN, similar to
what getgrent does by itself.
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Update copyright years that are not handled by scripts/update-copyright.
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Provide an example systemd unit and tmpfile for running nscd.
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Autoconf has been deprecating configure.in for quite a long time.
Rename all our configure.in and preconfigure.in files to .ac.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Fixes unclosed '{' if HAVE_SENDFILE is defined (BZ #15895).
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Fixes BZ #15890.
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These prototypes are duplicated in many places. Add a dedicated
header for holding prototypes for program-specific functions to
avoid that.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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We refactor the inotify file checking code and the
database clearing code out of the main_loop_poll and
mail_loop_epoll functions. We document some the related
functions with appropriate comments.
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This reverts commit dd31ac7a8e0d4cc24eee6815f9101caa5aa64291.
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This reverts commit 70d3e06ed0ffabb6ce974cc94b2cff1d67252193.
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This reverts commit 7e9b080575fd68c788c33623594ba5516fa7ceb0.
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* nscd/grpcache.c (cache_addgr): Properly check for short write.
* nscd/initgrcache.c (addinitgroupsX): Likewise.
* nscd/pwdcache.c (cache_addpw): Likewise.
* nscd/servicescache.c (cache_addserv): Likewise. Don't write
more than recsize.
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