1998-10-18 23:16:22 +08:00
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/* Cache handling for group lookup.
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2020-01-01 08:14:33 +08:00
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Copyright (C) 1998-2020 Free Software Foundation, Inc.
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1998-01-31 16:39:55 +08:00
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This file is part of the GNU C Library.
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1998-10-18 23:16:22 +08:00
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
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1998-01-31 16:39:55 +08:00
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2005-12-07 13:49:17 +08:00
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This program is free software; you can redistribute it and/or modify
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2007-07-16 08:56:07 +08:00
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it under the terms of the GNU General Public License as published
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by the Free Software Foundation; version 2 of the License, or
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(at your option) any later version.
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1998-01-31 16:39:55 +08:00
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2005-12-07 13:49:17 +08:00
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This program is distributed in the hope that it will be useful,
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1998-01-31 16:39:55 +08:00
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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2005-12-07 13:49:17 +08:00
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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1998-01-31 16:39:55 +08:00
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2005-12-07 13:49:17 +08:00
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You should have received a copy of the GNU General Public License
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Prefer https to http for gnu.org and fsf.org URLs
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
2019-09-07 13:40:42 +08:00
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along with this program; if not, see <https://www.gnu.org/licenses/>. */
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1998-01-31 16:39:55 +08:00
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2004-08-27 02:35:05 +08:00
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#include <assert.h>
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1998-01-31 16:39:55 +08:00
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#include <errno.h>
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1998-10-18 23:16:22 +08:00
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#include <error.h>
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1998-01-31 16:39:55 +08:00
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#include <grp.h>
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2004-08-27 02:35:05 +08:00
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#include <libintl.h>
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2002-03-22 15:03:30 +08:00
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#include <stdbool.h>
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1998-10-18 23:16:22 +08:00
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#include <stddef.h>
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#include <stdio.h>
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2000-09-30 00:45:44 +08:00
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#include <stdint.h>
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Update.
1998-02-10 23:57 Ulrich Drepper <drepper@happy.cygnus.com>
* misc/tst-efgcvt.c: Add more tests.
* misc/efgcvt_r.c: Correct result for above new tests.
1998-02-06 17:22 H.J. Lu <hjl@gnu.org>
* misc/efgcvt_r.c (fcvt_r, ecvt_r): Correctly handle
NDIGIT <= 0.
1998-02-10 16:48 Philip Blundell <pb@nexus.co.uk>
* Makerules (install-no-libc.a-nosubdir): Don't install-bin (etc)
if the programs weren't built.
1998-02-09 10:12 Philip Blundell <pb@nexus.co.uk>
* sysdeps/libm-ieee754/s_exp2.c (__ieee754_exp2): If we don't have
FE_TONEAREST, soldier on regardless and do the best we can.
* sysdeps/libm-ieee754/s_exp2f.c (__ieee754_exp2f): likewise.
1998-02-5 17:20 Philip Blundell <pb@nexus.co.uk>
* sysdeps/standalone/filedesc.h: Define __need_FOPEN_MAX, not
_STDIO_H, before including <bits/stdio_lim.h>.
* sysdeps/standalone/arm/bits/errno.h (EOVERFLOW): Added.
* io/fts.c (fts_build): Don't try to use d_type if it doesn't
exist.
* sysdeps/arm/sys/ucontext.h: New file.
1998-02-04 10:11 Philip Blundell <pb@nexus.co.uk>
* manual/stdio.texi (Formatted Output Functions): Explicitly say
that the return value from snprintf() does not count the
terminating NUL as a character.
1998-02-10 16:57 Ulrich Drepper <drepper@happy.cygnus.com>
* manual/users.texi: Rewrite to describe correct POSIX behaviour,
add description for sete[ug]id and general cleanup.
Patch by Zack Weinberg <zack@rabi.phys.columbia.edu>.
1998-01-04 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* Makefile (parent-clean): Don't remove makefile fragments here.
(postclean): New variable.
(clean): Remove makefile fragments here.
(realclean distclean): Likewise. Pass sysdep-subdirs to sub-make.
(generated): Add isomac and isomanc.out.
* Makeconfig ($(common-objpfx)soversions.mk): Don't generate if
avoid-generated is set.
(postclean-generated): Add soversion.mk.
($(common-objpfx)version.mk): Don't include if avoid-generated is
set.
* Makerules: Still need to include $(+sysdir_pfx)sysd-Makefile if
avoid-generated is set.
(common-generated): Add libc.so and libc.so$(libc.so-version).
(generated): Add versioned libraries.
(common-mostlyclean): Also remove %.so and %_pic.a.
* csu/Makefile (generated): Add abi-tag.h.
* db2/Makefile (extra-objs): Add getlong.o.
* elf/Makefile (generated): Add ld.so, ldd and
$(rtld-installed-name).
(others): Add ldconfig here instead of ldconfig.o to extra-objs.
* malloc/Makefile (generated): Add mtrace.
* po/Makefile: Don't include version.mk, not needed any more.
* sunrpc/Makefile (generated): Add rpc-proto.d and rpcgen.
* sysdeps/unix/Makefile: Fix local_lim.h -> bits/local_lim.h,
syscall.h -> sys/syscall.h.
(common-generated): Add s-proto.d.
(postclean-generated): Add sysd-syscalls.
* localedata/Makefile (test-output): Add all output files.
(generated): Add test-input and test-output.
(generated-dirs): Add all the dirs.
1998-01-04 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* Makefile (test-output, generated, generated-dirs): New
variables.
1998-02-10 16:57 Ulrich Drepper <drepper@happy.cygnus.com>
* resolv/nss_dns/dns-host.c: Various code cleanups.
1998-02-09 08:10 H.J. Lu <hjl@gnu.org>
* resolv/gethnamaddr.c (getanswer): Fix the PTR/CNAME bug.
From Philip Blundell <pb@nexus.co.uk>.
* resolv/nss_dns/dns-host.c (getanswer_r): Ditto.
1998-02-08 Andreas Jaeger <aj@arthur.rhein-neckar.de>
* libc.map: Add .rem, .div, .mul, .udiv, .umul, .urem for Sparc.
Suggested by debian/sparc porters.
1998-02-07 Andreas Jaeger <aj@arthur.rhein-neckar.de>
* misc/tst-efgcvt.c: Totally rewritten, added a lot of new tests
for ecvt and fcvt.
1998-02-10 16:32 Ulrich Drepper <drepper@happy.cygnus.com>
* sysdeps/unix/sysv/linux/ptsname.c (__ptsname_r): Use __xstat and
__fxstat instead of stat and fstat. Use namespace clean __stpcpy.
* signal/signal.h: Always define sigset_t if __need_sigset_t is
defined even if __USE_POSIX is not defined.
1998-02-02 20:51 Zack Weinberg <zack@rabi.phys.columbia.edu>
* sysdeps/unix/sysv/linux/ptsname.c (__ptsname_r): Correct last patch
to support obsolete tty major numbers correctly.
1998-02-02 08:47 H.J. Lu <hjl@gnu.org>
* login/Makefile ($(inst_libexecdir)/pt_chown): Make the target
directory first and ignore install error.
* sysdeps/unix/sysv/linux/ptsname.c (__ptsname_r): Substract
128 from ptyno and fix a typo for the BSD style pty.
1998-02-01 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* sysdeps/unix/Makefile ($(common-objpfx)s-proto.d): Depend on all
syscalls.list's.
1998-02-01 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* sysdeps/unix/sysv/linux/Makefile (sysdep_routines): Add
getresuid and getresgid.
* sysdeps/unix/sysv/linux/getresuid.c: New file.
* sysdeps/unix/sysv/linux/getresgid.c: New file.
* sysdeps/unix/sysv/linux/syscalls.list: Remove getres[ug]id, add
s_getres[ug]id.
* sysdeps/unix/sysv/linux/alpha/syscalls.list: Add getres[ug]id.
* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/mips/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/powerpc/syscalls.list: Likewise.
1998-02-02 08:11 H.J. Lu <hjl@gnu.org>
* nscd/grpcache.c: Include <stdlib.h>.
1998-02-01 16:01 H.J. Lu <hjl@gnu.org>
* stdlib/atoll.c: Fix comments.
* sysdeps/posix/ttyname.c: Ignore stdin/stdout/stderr.
* sysdeps/posix/ttyname_r.c: Ditto.
1998-02-03 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* io/sys/stat.h: Define S_IFLNK and S_IFSOCK if __USE_BSD or
__USE_MISC, independent of __USE_UNIX98.
1998-02-10 19:18 Ulrich Drepper <drepper@happy.cygnus.com>
* sysdeps/unix/sysv/linux/i386/sigaction.c (__libc_missing_rt_sigs):
Rename from __libc_have_rt_sigs and leave as COMMON data.
1998-02-04 11:58 Richard Henderson <rth@twiddle.rth.home>
* Makeconfig (CFLAGS-.os): Kill -fno-common.
* Makerules (libc.so): Prelink libc_pic.a, allocating commons.
* libc.map (GLIBC_2.1): Add Linux/Alpha tv64 symbols.
* elf/rtld.map: New file. Needed to define the GLIBC_2.*
version symbols.
* include/libc-symbols.h (symbol_version, default_symbol_version):
Provide asm versions and correct !DO_VERSIONING versions.
* sysdeps/unix/make-syscalls.sh: Recognize version symbols in
the weak symbol list.
* sysdeps/unix/sysv/linux/sigaction.c (__libc_missing_rt_sigs):
Rename from __libc_have_rt_sigs and leave as COMMON data.
* sysdeps/unix/sysv/linux/sigpending.c: Likewise.
* sysdeps/unix/sysv/linux/sigprocmask.c: Likewise.
* sysdeps/unix/sysv/linux/sigsuspend.c: Likewise.
1998-02-04 16:41 Zack Weinberg <zack@rabi.phys.columbia.edu>
* sunrpc/Makefile: Correct dependencies of rpcgen.
1998-02-10 03:00 Ulrich Drepper <drepper@happy.cygnus.com>
* nscd/Makefile: Fix test for available linuxthreads add-on.
Patch by Zack Weinberg <zack@rabi.phys.columbia.edu>.
1998-02-05 Andreas Jaeger <aj@arthur.rhein-neckar.de>
* sysdeps/unix/sysv/linux/syscalls.list: Fix typo in lchown.
1998-02-03 Andreas Jaeger <aj@arthur.rhein-neckar.de>
* sysdeps/gnu/Makefile: Respect with-cvs variable.
* manual/errno.texi (Error Messages): Correct description of
strerror_r. Pointed out by jonas@bagge.se.
1998-01-29 Andreas Jaeger <aj@arthur.rhein-neckar.de>
* manual/socket.texi (Host Address Functions): Clarify description
of inet_network.
1998-02-07 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* sysdeps/unix/grantpt.c (argv): Move const to toplevel.
(grantpt): Delete superfluous cast.
1998-02-06 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* Makefile ($(inst_slibdir)/libc-$(version).so): Depend on
elf/ldso_install instead of elf/subdir_install.
(elf/ldso_install): New target.
* elf/Makefile (ldso_install): New target.
1998-02-07 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* sysdeps/unix/sysv/linux/powerpc/socket.S: Really do the change
of 1998-01-06.
1998-02-07 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* string/bits/string2.h (strcmp): Use __string2_1bptr_p only for
constant expressions.
1998-02-07 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* nss/test-netdb.c: Include <unistd.h> for gethostname and "nss.h"
for __nss_configure_lookup.
(output_hostent): Remove unused variable.
1998-02-07 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* string/tst-inlcall.c: Fix format string.
1998-02-09 Andreas Jaeger <aj@arthur.rhein-neckar.de>
* inet/netinet/in.h: Rename second parameter of bindresvport to
avoid buggy gcc warning. [PR libc/412]
1998-02-11 04:06:30 +08:00
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#include <stdlib.h>
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1998-01-31 16:39:55 +08:00
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#include <string.h>
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1998-07-04 18:39:13 +08:00
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#include <unistd.h>
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2004-08-27 02:35:05 +08:00
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#include <sys/mman.h>
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2005-11-19 06:42:21 +08:00
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#include <sys/socket.h>
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2002-03-22 15:03:30 +08:00
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#include <stackinfo.h>
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2018-06-25 22:04:29 +08:00
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#include <scratch_buffer.h>
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1998-01-31 16:39:55 +08:00
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#include "nscd.h"
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1998-10-18 23:16:22 +08:00
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#include "dbg_log.h"
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1998-01-31 16:39:55 +08:00
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1998-10-18 23:16:22 +08:00
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/* This is the standard reply in case the service is disabled. */
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static const gr_response_header disabled =
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1998-01-31 16:39:55 +08:00
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{
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2002-12-16 07:23:24 +08:00
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.version = NSCD_VERSION,
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.found = -1,
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.gr_name_len = 0,
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.gr_passwd_len = 0,
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.gr_gid = -1,
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.gr_mem_cnt = 0,
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1998-01-31 16:39:55 +08:00
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};
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1998-10-18 23:16:22 +08:00
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/* This is the struct describing how to write this record. */
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const struct iovec grp_iov_disabled =
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1998-01-31 16:39:55 +08:00
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{
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2002-12-16 07:23:24 +08:00
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.iov_base = (void *) &disabled,
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.iov_len = sizeof (disabled)
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1998-01-31 16:39:55 +08:00
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};
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1998-10-18 23:16:22 +08:00
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/* This is the standard reply in case we haven't found the dataset. */
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static const gr_response_header notfound =
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1998-01-31 16:39:55 +08:00
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{
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2002-12-16 07:23:24 +08:00
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.version = NSCD_VERSION,
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.found = 0,
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.gr_name_len = 0,
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.gr_passwd_len = 0,
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.gr_gid = -1,
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.gr_mem_cnt = 0,
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1998-01-31 16:39:55 +08:00
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};
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2011-02-06 09:07:27 +08:00
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static time_t
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2004-08-27 02:35:05 +08:00
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cache_addgr (struct database_dyn *db, int fd, request_header *req,
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const void *key, struct group *grp, uid_t owner,
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2009-02-14 04:36:37 +08:00
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struct hashentry *const he, struct datahead *dh, int errval)
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1998-01-31 16:39:55 +08:00
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{
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2012-12-04 23:14:13 +08:00
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bool all_written = true;
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1998-10-18 23:16:22 +08:00
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ssize_t total;
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time_t t = time (NULL);
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1998-01-31 16:39:55 +08:00
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2004-08-27 02:35:05 +08:00
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/* We allocate all data in one memory block: the iov vector,
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the response header and the dataset itself. */
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struct dataset
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{
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struct datahead head;
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gr_response_header resp;
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char strdata[0];
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} *dataset;
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assert (offsetof (struct dataset, resp) == offsetof (struct datahead, data));
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2011-02-06 09:07:27 +08:00
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time_t timeout = MAX_TIMEOUT_VALUE;
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1998-10-18 23:16:22 +08:00
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if (grp == NULL)
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1998-01-31 16:39:55 +08:00
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{
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2004-08-27 02:35:05 +08:00
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if (he != NULL && errval == EAGAIN)
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{
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/* If we have an old record available but cannot find one
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now because the service is not available we keep the old
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record and make sure it does not get removed. */
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if (reload_count != UINT_MAX)
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/* Do not reset the value if we never not reload the record. */
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dh->nreloads = reload_count - 1;
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2011-02-06 09:07:27 +08:00
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/* Reload with the same time-to-live value. */
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timeout = dh->timeout = t + db->postimeout;
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2012-12-04 23:14:13 +08:00
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total = 0;
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2004-08-27 02:35:05 +08:00
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}
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else
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{
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/* We have no data. This means we send the standard reply for this
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case. */
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total = sizeof (notfound);
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1998-01-31 16:39:55 +08:00
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2012-12-04 23:14:13 +08:00
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if (fd != -1
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&& TEMP_FAILURE_RETRY (send (fd, ¬found, total,
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MSG_NOSIGNAL)) != total)
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all_written = false;
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1998-01-31 16:39:55 +08:00
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2012-01-21 11:39:54 +08:00
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/* If we have a transient error or cannot permanently store
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the result, so be it. */
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if (errno == EAGAIN || __builtin_expect (db->negtimeout == 0, 0))
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2011-07-02 10:53:01 +08:00
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{
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/* Mark the old entry as obsolete. */
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if (dh != NULL)
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dh->usable = false;
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}
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else if ((dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len, 1)) != NULL)
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2004-08-27 02:35:05 +08:00
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{
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2014-04-30 14:27:09 +08:00
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timeout = datahead_init_neg (&dataset->head,
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(sizeof (struct dataset)
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+ req->key_len), total,
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db->negtimeout);
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1998-02-24 23:22:29 +08:00
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2004-08-27 02:35:05 +08:00
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/* This is the reply. */
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memcpy (&dataset->resp, ¬found, total);
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1998-01-31 16:39:55 +08:00
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2004-08-27 02:35:05 +08:00
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|
/* Copy the key data. */
|
|
|
|
memcpy (dataset->strdata, key, req->key_len);
|
1998-01-31 16:39:55 +08:00
|
|
|
|
2004-09-12 18:10:48 +08:00
|
|
|
/* If necessary, we also propagate the data to disk. */
|
|
|
|
if (db->persistent)
|
|
|
|
{
|
|
|
|
// XXX async OK?
|
|
|
|
uintptr_t pval = (uintptr_t) dataset & ~pagesize_m1;
|
|
|
|
msync ((void *) pval,
|
|
|
|
((uintptr_t) dataset & pagesize_m1)
|
|
|
|
+ sizeof (struct dataset) + req->key_len, MS_ASYNC);
|
|
|
|
}
|
|
|
|
|
2008-05-11 11:03:14 +08:00
|
|
|
(void) cache_add (req->type, &dataset->strdata, req->key_len,
|
2008-05-19 05:54:43 +08:00
|
|
|
&dataset->head, true, db, owner, he == NULL);
|
2004-08-27 02:35:05 +08:00
|
|
|
|
2009-07-17 22:49:16 +08:00
|
|
|
pthread_rwlock_unlock (&db->lock);
|
|
|
|
|
2004-08-27 02:35:05 +08:00
|
|
|
/* Mark the old entry as obsolete. */
|
|
|
|
if (dh != NULL)
|
|
|
|
dh->usable = false;
|
|
|
|
}
|
2004-07-19 02:24:30 +08:00
|
|
|
}
|
1998-01-31 16:39:55 +08:00
|
|
|
}
|
1998-07-04 18:39:13 +08:00
|
|
|
else
|
|
|
|
{
|
1998-10-18 23:16:22 +08:00
|
|
|
/* Determine the I/O structure. */
|
|
|
|
size_t gr_name_len = strlen (grp->gr_name) + 1;
|
|
|
|
size_t gr_passwd_len = strlen (grp->gr_passwd) + 1;
|
|
|
|
size_t gr_mem_cnt = 0;
|
2000-09-30 00:45:44 +08:00
|
|
|
uint32_t *gr_mem_len;
|
1998-10-18 23:16:22 +08:00
|
|
|
size_t gr_mem_len_total = 0;
|
|
|
|
char *gr_name;
|
|
|
|
char *cp;
|
2004-08-27 02:35:05 +08:00
|
|
|
const size_t key_len = strlen (key);
|
2005-07-19 05:07:28 +08:00
|
|
|
const size_t buf_len = 3 * sizeof (grp->gr_gid) + key_len + 1;
|
2012-11-30 01:45:34 +08:00
|
|
|
size_t alloca_used = 0;
|
|
|
|
char *buf = alloca_account (buf_len, alloca_used);
|
1998-10-18 23:16:22 +08:00
|
|
|
ssize_t n;
|
|
|
|
size_t cnt;
|
|
|
|
|
|
|
|
/* We need this to insert the `bygid' entry. */
|
2004-08-27 02:35:05 +08:00
|
|
|
int key_offset;
|
|
|
|
n = snprintf (buf, buf_len, "%d%c%n%s", grp->gr_gid, '\0',
|
|
|
|
&key_offset, (char *) key) + 1;
|
1998-10-18 23:16:22 +08:00
|
|
|
|
|
|
|
/* Determine the length of all members. */
|
|
|
|
while (grp->gr_mem[gr_mem_cnt])
|
|
|
|
++gr_mem_cnt;
|
2012-11-30 01:45:34 +08:00
|
|
|
gr_mem_len = alloca_account (gr_mem_cnt * sizeof (uint32_t), alloca_used);
|
1998-10-18 23:16:22 +08:00
|
|
|
for (gr_mem_cnt = 0; grp->gr_mem[gr_mem_cnt]; ++gr_mem_cnt)
|
|
|
|
{
|
|
|
|
gr_mem_len[gr_mem_cnt] = strlen (grp->gr_mem[gr_mem_cnt]) + 1;
|
|
|
|
gr_mem_len_total += gr_mem_len[gr_mem_cnt];
|
|
|
|
}
|
1998-07-04 18:39:13 +08:00
|
|
|
|
2012-12-04 23:14:13 +08:00
|
|
|
total = (offsetof (struct dataset, strdata)
|
|
|
|
+ gr_mem_cnt * sizeof (uint32_t)
|
|
|
|
+ gr_name_len + gr_passwd_len + gr_mem_len_total);
|
2004-08-27 02:35:05 +08:00
|
|
|
|
|
|
|
/* If we refill the cache, first assume the reconrd did not
|
|
|
|
change. Allocate memory on the cache since it is likely
|
|
|
|
discarded anyway. If it turns out to be necessary to have a
|
|
|
|
new record we can still allocate real memory. */
|
2012-11-30 01:45:34 +08:00
|
|
|
bool dataset_temporary = false;
|
|
|
|
bool dataset_malloced = false;
|
2004-08-27 02:35:05 +08:00
|
|
|
dataset = NULL;
|
|
|
|
|
|
|
|
if (he == NULL)
|
2016-03-03 00:58:42 +08:00
|
|
|
{
|
|
|
|
/* Prevent an INVALIDATE request from pruning the data between
|
|
|
|
the two calls to cache_add. */
|
|
|
|
if (db->propagate)
|
|
|
|
pthread_mutex_lock (&db->prune_run_lock);
|
|
|
|
dataset = (struct dataset *) mempool_alloc (db, total + n, 1);
|
|
|
|
}
|
2004-08-27 02:35:05 +08:00
|
|
|
|
|
|
|
if (dataset == NULL)
|
|
|
|
{
|
2016-03-03 00:58:42 +08:00
|
|
|
if (he == NULL && db->propagate)
|
|
|
|
pthread_mutex_unlock (&db->prune_run_lock);
|
|
|
|
|
2004-08-27 02:35:05 +08:00
|
|
|
/* We cannot permanently add the result in the moment. But
|
|
|
|
we can provide the result as is. Store the data in some
|
|
|
|
temporary memory. */
|
2012-11-30 01:45:34 +08:00
|
|
|
if (! __libc_use_alloca (alloca_used + total + n))
|
|
|
|
{
|
|
|
|
dataset = malloc (total + n);
|
|
|
|
/* Perhaps we should log a message that we were unable
|
|
|
|
to allocate memory for a large request. */
|
|
|
|
if (dataset == NULL)
|
|
|
|
goto out;
|
|
|
|
dataset_malloced = true;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
dataset = alloca_account (total + n, alloca_used);
|
2004-08-27 02:35:05 +08:00
|
|
|
|
|
|
|
/* We cannot add this record to the permanent database. */
|
2012-11-30 01:45:34 +08:00
|
|
|
dataset_temporary = true;
|
2004-08-27 02:35:05 +08:00
|
|
|
}
|
|
|
|
|
2014-04-30 14:27:09 +08:00
|
|
|
timeout = datahead_init_pos (&dataset->head, total + n,
|
|
|
|
total - offsetof (struct dataset, resp),
|
|
|
|
he == NULL ? 0 : dh->nreloads + 1,
|
|
|
|
db->postimeout);
|
2004-08-27 02:35:05 +08:00
|
|
|
|
|
|
|
dataset->resp.version = NSCD_VERSION;
|
|
|
|
dataset->resp.found = 1;
|
|
|
|
dataset->resp.gr_name_len = gr_name_len;
|
|
|
|
dataset->resp.gr_passwd_len = gr_passwd_len;
|
|
|
|
dataset->resp.gr_gid = grp->gr_gid;
|
|
|
|
dataset->resp.gr_mem_cnt = gr_mem_cnt;
|
|
|
|
|
|
|
|
cp = dataset->strdata;
|
1998-01-31 16:39:55 +08:00
|
|
|
|
1998-10-18 23:16:22 +08:00
|
|
|
/* This is the member string length array. */
|
2000-09-30 00:45:44 +08:00
|
|
|
cp = mempcpy (cp, gr_mem_len, gr_mem_cnt * sizeof (uint32_t));
|
2000-04-28 13:12:30 +08:00
|
|
|
gr_name = cp;
|
|
|
|
cp = mempcpy (cp, grp->gr_name, gr_name_len);
|
1998-10-18 23:16:22 +08:00
|
|
|
cp = mempcpy (cp, grp->gr_passwd, gr_passwd_len);
|
1998-01-31 16:39:55 +08:00
|
|
|
|
1998-10-18 23:16:22 +08:00
|
|
|
for (cnt = 0; cnt < gr_mem_cnt; ++cnt)
|
|
|
|
cp = mempcpy (cp, grp->gr_mem[cnt], gr_mem_len[cnt]);
|
1998-01-31 16:39:55 +08:00
|
|
|
|
2004-08-27 02:35:05 +08:00
|
|
|
/* Finally the stringified GID value. */
|
1998-10-18 23:16:22 +08:00
|
|
|
memcpy (cp, buf, n);
|
2004-08-27 02:35:05 +08:00
|
|
|
char *key_copy = cp + key_offset;
|
|
|
|
assert (key_copy == (char *) rawmemchr (cp, '\0') + 1);
|
1998-01-31 16:39:55 +08:00
|
|
|
|
2008-06-13 00:16:38 +08:00
|
|
|
assert (cp == dataset->strdata + total - offsetof (struct dataset,
|
|
|
|
strdata));
|
|
|
|
|
2004-08-27 02:35:05 +08:00
|
|
|
/* Now we can determine whether on refill we have to create a new
|
|
|
|
record or not. */
|
|
|
|
if (he != NULL)
|
|
|
|
{
|
|
|
|
assert (fd == -1);
|
2004-08-26 01:24:52 +08:00
|
|
|
|
2004-08-27 02:35:05 +08:00
|
|
|
if (total + n == dh->allocsize
|
|
|
|
&& total - offsetof (struct dataset, resp) == dh->recsize
|
|
|
|
&& memcmp (&dataset->resp, dh->data,
|
|
|
|
dh->allocsize - offsetof (struct dataset, resp)) == 0)
|
|
|
|
{
|
|
|
|
/* The data has not changed. We will just bump the
|
|
|
|
timeout value. Note that the new record has been
|
|
|
|
allocated on the stack and need not be freed. */
|
|
|
|
dh->timeout = dataset->head.timeout;
|
|
|
|
++dh->nreloads;
|
2012-11-30 01:45:34 +08:00
|
|
|
|
|
|
|
/* If the new record was allocated via malloc, then we must free
|
|
|
|
it here. */
|
|
|
|
if (dataset_malloced)
|
|
|
|
free (dataset);
|
2004-08-27 02:35:05 +08:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* We have to create a new record. Just allocate
|
|
|
|
appropriate memory and copy it. */
|
|
|
|
struct dataset *newp
|
2009-02-14 04:36:37 +08:00
|
|
|
= (struct dataset *) mempool_alloc (db, total + n, 1);
|
2004-08-27 02:35:05 +08:00
|
|
|
if (newp != NULL)
|
|
|
|
{
|
|
|
|
/* Adjust pointers into the memory block. */
|
|
|
|
gr_name = (char *) newp + (gr_name - (char *) dataset);
|
|
|
|
cp = (char *) newp + (cp - (char *) dataset);
|
2007-02-21 17:11:47 +08:00
|
|
|
key_copy = (char *) newp + (key_copy - (char *) dataset);
|
2004-08-27 02:35:05 +08:00
|
|
|
|
|
|
|
dataset = memcpy (newp, dataset, total + n);
|
2012-11-30 01:45:34 +08:00
|
|
|
dataset_temporary = false;
|
2004-08-27 02:35:05 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Mark the old record as obsolete. */
|
|
|
|
dh->usable = false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* We write the dataset before inserting it to the database
|
|
|
|
since while inserting this thread might block and so would
|
|
|
|
unnecessarily let the receiver wait. */
|
|
|
|
assert (fd != -1);
|
1998-01-31 16:39:55 +08:00
|
|
|
|
2018-05-16 21:51:15 +08:00
|
|
|
if (writeall (fd, &dataset->resp, dataset->head.recsize)
|
|
|
|
!= dataset->head.recsize)
|
|
|
|
all_written = false;
|
2004-08-27 02:35:05 +08:00
|
|
|
}
|
1998-01-31 16:39:55 +08:00
|
|
|
|
2004-08-27 02:35:05 +08:00
|
|
|
/* Add the record to the database. But only if it has not been
|
|
|
|
stored on the stack. */
|
2012-11-30 01:45:34 +08:00
|
|
|
if (! dataset_temporary)
|
2004-08-27 02:35:05 +08:00
|
|
|
{
|
|
|
|
/* If necessary, we also propagate the data to disk. */
|
|
|
|
if (db->persistent)
|
2004-09-11 07:56:29 +08:00
|
|
|
{
|
|
|
|
// XXX async OK?
|
|
|
|
uintptr_t pval = (uintptr_t) dataset & ~pagesize_m1;
|
|
|
|
msync ((void *) pval,
|
|
|
|
((uintptr_t) dataset & pagesize_m1) + total + n,
|
|
|
|
MS_ASYNC);
|
|
|
|
}
|
1998-02-24 23:22:29 +08:00
|
|
|
|
2004-08-27 02:35:05 +08:00
|
|
|
/* NB: in the following code we always must add the entry
|
|
|
|
marked with FIRST first. Otherwise we end up with
|
|
|
|
dangling "pointers" in case a latter hash entry cannot be
|
|
|
|
added. */
|
2006-04-27 01:32:10 +08:00
|
|
|
bool first = true;
|
2004-07-28 06:52:49 +08:00
|
|
|
|
2004-08-27 02:35:05 +08:00
|
|
|
/* If the request was by GID, add that entry first. */
|
2006-04-27 01:32:10 +08:00
|
|
|
if (req->type == GETGRBYGID)
|
2004-08-27 02:35:05 +08:00
|
|
|
{
|
2004-09-05 14:47:36 +08:00
|
|
|
if (cache_add (GETGRBYGID, cp, key_offset, &dataset->head, true,
|
2008-05-19 05:54:43 +08:00
|
|
|
db, owner, he == NULL) < 0)
|
2008-05-11 11:03:14 +08:00
|
|
|
goto out;
|
2006-04-27 01:32:10 +08:00
|
|
|
|
|
|
|
first = false;
|
2004-08-27 02:35:05 +08:00
|
|
|
}
|
|
|
|
/* If the key is different from the name add a separate entry. */
|
|
|
|
else if (strcmp (key_copy, gr_name) != 0)
|
|
|
|
{
|
|
|
|
if (cache_add (GETGRBYNAME, key_copy, key_len + 1,
|
2008-05-19 05:54:43 +08:00
|
|
|
&dataset->head, true, db, owner, he == NULL) < 0)
|
2008-05-11 11:03:14 +08:00
|
|
|
goto out;
|
2004-08-27 02:35:05 +08:00
|
|
|
|
|
|
|
first = false;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* We have to add the value for both, byname and byuid. */
|
2006-04-27 01:32:10 +08:00
|
|
|
if ((req->type == GETGRBYNAME || db->propagate)
|
|
|
|
&& __builtin_expect (cache_add (GETGRBYNAME, gr_name,
|
|
|
|
gr_name_len,
|
2008-05-19 05:54:43 +08:00
|
|
|
&dataset->head, first, db, owner,
|
|
|
|
he == NULL)
|
2006-04-27 01:32:10 +08:00
|
|
|
== 0, 1))
|
2004-08-27 02:35:05 +08:00
|
|
|
{
|
2006-04-27 01:32:10 +08:00
|
|
|
if (req->type == GETGRBYNAME && db->propagate)
|
2004-09-05 14:47:36 +08:00
|
|
|
(void) cache_add (GETGRBYGID, cp, key_offset, &dataset->head,
|
2008-05-19 05:54:43 +08:00
|
|
|
false, db, owner, false);
|
2004-08-27 02:35:05 +08:00
|
|
|
}
|
2009-07-17 22:49:16 +08:00
|
|
|
|
|
|
|
out:
|
|
|
|
pthread_rwlock_unlock (&db->lock);
|
2016-03-03 00:58:42 +08:00
|
|
|
if (he == NULL && db->propagate)
|
|
|
|
pthread_mutex_unlock (&db->prune_run_lock);
|
2004-08-27 02:35:05 +08:00
|
|
|
}
|
1998-01-31 16:39:55 +08:00
|
|
|
}
|
|
|
|
|
2012-12-04 23:14:13 +08:00
|
|
|
if (__builtin_expect (!all_written, 0) && debug_level > 0)
|
1998-01-31 16:39:55 +08:00
|
|
|
{
|
1998-10-18 23:16:22 +08:00
|
|
|
char buf[256];
|
|
|
|
dbg_log (_("short write in %s: %s"), __FUNCTION__,
|
|
|
|
strerror_r (errno, buf, sizeof (buf)));
|
1998-01-31 16:39:55 +08:00
|
|
|
}
|
2011-02-06 09:07:27 +08:00
|
|
|
|
|
|
|
return timeout;
|
1998-01-31 16:39:55 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2004-08-27 02:35:05 +08:00
|
|
|
union keytype
|
|
|
|
{
|
|
|
|
void *v;
|
|
|
|
gid_t g;
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
lookup (int type, union keytype key, struct group *resultbufp, char *buffer,
|
|
|
|
size_t buflen, struct group **grp)
|
|
|
|
{
|
|
|
|
if (type == GETGRBYNAME)
|
|
|
|
return __getgrnam_r (key.v, resultbufp, buffer, buflen, grp);
|
|
|
|
else
|
|
|
|
return __getgrgid_r (key.g, resultbufp, buffer, buflen, grp);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2011-02-06 09:07:27 +08:00
|
|
|
static time_t
|
2004-08-27 02:35:05 +08:00
|
|
|
addgrbyX (struct database_dyn *db, int fd, request_header *req,
|
|
|
|
union keytype key, const char *keystr, uid_t uid,
|
|
|
|
struct hashentry *he, struct datahead *dh)
|
1998-10-18 23:16:22 +08:00
|
|
|
{
|
|
|
|
/* Search for the entry matching the key. Please note that we don't
|
|
|
|
look again in the table whether the dataset is now available. We
|
|
|
|
simply insert it. It does not matter if it is in there twice. The
|
|
|
|
pruning function only will look at the timestamp. */
|
2018-06-25 22:04:29 +08:00
|
|
|
|
1998-10-18 23:16:22 +08:00
|
|
|
struct group resultbuf;
|
|
|
|
struct group *grp;
|
2004-08-27 02:35:05 +08:00
|
|
|
int errval = 0;
|
2018-06-25 22:04:29 +08:00
|
|
|
struct scratch_buffer tmpbuf;
|
|
|
|
scratch_buffer_init (&tmpbuf);
|
1998-01-31 16:39:55 +08:00
|
|
|
|
2014-02-10 21:45:42 +08:00
|
|
|
if (__glibc_unlikely (debug_level > 0))
|
2004-08-27 02:35:05 +08:00
|
|
|
{
|
|
|
|
if (he == NULL)
|
|
|
|
dbg_log (_("Haven't found \"%s\" in group cache!"), keystr);
|
|
|
|
else
|
|
|
|
dbg_log (_("Reloading \"%s\" in group cache!"), keystr);
|
|
|
|
}
|
1998-01-31 16:39:55 +08:00
|
|
|
|
2018-06-25 22:04:29 +08:00
|
|
|
while (lookup (req->type, key, &resultbuf,
|
|
|
|
tmpbuf.data, tmpbuf.length, &grp) != 0
|
2004-08-27 02:35:05 +08:00
|
|
|
&& (errval = errno) == ERANGE)
|
2018-06-25 22:04:29 +08:00
|
|
|
if (!scratch_buffer_grow (&tmpbuf))
|
|
|
|
{
|
|
|
|
/* We ran out of memory. We cannot do anything but sending a
|
|
|
|
negative response. In reality this should never
|
|
|
|
happen. */
|
|
|
|
grp = NULL;
|
|
|
|
/* We set the error to indicate this is (possibly) a temporary
|
|
|
|
error and that it does not mean the entry is not available
|
|
|
|
at all. */
|
|
|
|
errval = EAGAIN;
|
|
|
|
break;
|
|
|
|
}
|
1998-01-31 16:39:55 +08:00
|
|
|
|
2011-02-06 09:07:27 +08:00
|
|
|
time_t timeout = cache_addgr (db, fd, req, keystr, grp, uid, he, dh, errval);
|
2018-06-25 22:04:29 +08:00
|
|
|
scratch_buffer_free (&tmpbuf);
|
2011-02-06 09:07:27 +08:00
|
|
|
return timeout;
|
1998-01-31 16:39:55 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
1998-10-18 23:16:22 +08:00
|
|
|
void
|
2004-08-27 02:35:05 +08:00
|
|
|
addgrbyname (struct database_dyn *db, int fd, request_header *req,
|
|
|
|
void *key, uid_t uid)
|
|
|
|
{
|
|
|
|
union keytype u = { .v = key };
|
|
|
|
|
|
|
|
addgrbyX (db, fd, req, u, key, uid, NULL, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2011-02-06 09:07:27 +08:00
|
|
|
time_t
|
2004-08-27 02:35:05 +08:00
|
|
|
readdgrbyname (struct database_dyn *db, struct hashentry *he,
|
|
|
|
struct datahead *dh)
|
|
|
|
{
|
|
|
|
request_header req =
|
|
|
|
{
|
|
|
|
.type = GETGRBYNAME,
|
|
|
|
.key_len = he->len
|
|
|
|
};
|
|
|
|
union keytype u = { .v = db->data + he->key };
|
|
|
|
|
2011-02-06 09:07:27 +08:00
|
|
|
return addgrbyX (db, -1, &req, u, db->data + he->key, he->owner, he, dh);
|
2004-08-27 02:35:05 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
addgrbygid (struct database_dyn *db, int fd, request_header *req,
|
1999-06-12 04:58:21 +08:00
|
|
|
void *key, uid_t uid)
|
1998-10-18 23:16:22 +08:00
|
|
|
{
|
2001-11-27 11:47:06 +08:00
|
|
|
char *ep;
|
2004-08-27 02:35:05 +08:00
|
|
|
gid_t gid = strtoul ((char *) key, &ep, 10);
|
2002-03-22 15:03:30 +08:00
|
|
|
|
2004-08-27 02:35:05 +08:00
|
|
|
if (*(char *) key == '\0' || *ep != '\0') /* invalid numeric uid */
|
2001-11-27 11:47:06 +08:00
|
|
|
{
|
|
|
|
if (debug_level > 0)
|
2011-02-06 09:07:27 +08:00
|
|
|
dbg_log (_("Invalid numeric gid \"%s\"!"), (char *) key);
|
2001-11-27 11:47:06 +08:00
|
|
|
|
|
|
|
errno = EINVAL;
|
|
|
|
return;
|
|
|
|
}
|
1998-01-31 16:39:55 +08:00
|
|
|
|
2004-08-27 02:35:05 +08:00
|
|
|
union keytype u = { .g = gid };
|
1998-01-31 16:39:55 +08:00
|
|
|
|
2004-08-27 02:35:05 +08:00
|
|
|
addgrbyX (db, fd, req, u, key, uid, NULL, NULL);
|
|
|
|
}
|
1999-06-12 04:58:21 +08:00
|
|
|
|
2002-03-22 15:03:30 +08:00
|
|
|
|
2011-02-06 09:07:27 +08:00
|
|
|
time_t
|
2004-08-27 02:35:05 +08:00
|
|
|
readdgrbygid (struct database_dyn *db, struct hashentry *he,
|
|
|
|
struct datahead *dh)
|
|
|
|
{
|
|
|
|
char *ep;
|
|
|
|
gid_t gid = strtoul (db->data + he->key, &ep, 10);
|
1998-01-31 16:39:55 +08:00
|
|
|
|
2004-08-27 02:35:05 +08:00
|
|
|
/* Since the key has been added before it must be OK. */
|
|
|
|
assert (*(db->data + he->key) != '\0' && *ep == '\0');
|
1999-06-12 04:58:21 +08:00
|
|
|
|
2004-08-27 02:35:05 +08:00
|
|
|
request_header req =
|
|
|
|
{
|
|
|
|
.type = GETGRBYGID,
|
|
|
|
.key_len = he->len
|
|
|
|
};
|
|
|
|
union keytype u = { .g = gid };
|
2002-03-22 15:03:30 +08:00
|
|
|
|
2011-02-06 09:07:27 +08:00
|
|
|
return addgrbyX (db, -1, &req, u, db->data + he->key, he->owner, he, dh);
|
1998-01-31 16:39:55 +08:00
|
|
|
}
|