1998-10-18 17:16:22 +02:00
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/* Cache handling for group lookup.
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2004-12-22 21:10:10 +01:00
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Copyright (C) 1998-2002, 2003, 2004 Free Software Foundation, Inc.
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1998-01-31 09:39:55 +01:00
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This file is part of the GNU C Library.
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1998-10-18 17:16:22 +02:00
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
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1998-01-31 09:39:55 +01:00
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2004-12-22 21:10:10 +01:00
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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1998-01-31 09:39:55 +01:00
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2004-12-22 21:10:10 +01:00
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The GNU C Library is distributed in the hope that it will be useful,
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1998-01-31 09:39:55 +01:00
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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2004-12-22 21:10:10 +01:00
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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1998-01-31 09:39:55 +01:00
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2004-12-22 21:10:10 +01:00
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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1998-01-31 09:39:55 +01:00
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2003-01-15 11:52:50 +01:00
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#include <alloca.h>
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2004-08-26 20:35:05 +02:00
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#include <assert.h>
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1998-01-31 09:39:55 +01:00
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#include <errno.h>
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1998-10-18 17:16:22 +02:00
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#include <error.h>
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1998-01-31 09:39:55 +01:00
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#include <grp.h>
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2004-08-26 20:35:05 +02:00
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#include <libintl.h>
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2002-03-22 08:03:30 +01:00
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#include <stdbool.h>
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1998-10-18 17:16:22 +02:00
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#include <stddef.h>
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#include <stdio.h>
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2000-09-29 18:45:44 +02:00
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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]
1998-02-10 21:06:30 +01:00
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#include <stdlib.h>
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1998-01-31 09:39:55 +01:00
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#include <string.h>
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1998-07-04 12:39:13 +02:00
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#include <unistd.h>
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2004-08-26 20:35:05 +02:00
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#include <sys/mman.h>
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2002-03-22 08:03:30 +01:00
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#include <stackinfo.h>
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1998-01-31 09:39:55 +01:00
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#include "nscd.h"
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1998-10-18 17:16:22 +02:00
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#include "dbg_log.h"
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1998-01-31 09:39:55 +01:00
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1998-10-18 17:16:22 +02:00
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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 09:39:55 +01:00
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{
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2002-12-16 00:23:24 +01:00
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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 09:39:55 +01:00
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};
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1998-10-18 17:16:22 +02:00
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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 09:39:55 +01:00
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{
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2002-12-16 00:23:24 +01:00
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.iov_base = (void *) &disabled,
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.iov_len = sizeof (disabled)
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1998-01-31 09:39:55 +01:00
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};
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1998-10-18 17:16:22 +02:00
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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 09:39:55 +01:00
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{
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2002-12-16 00:23:24 +01:00
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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 09:39:55 +01:00
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};
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1998-10-18 17:16:22 +02:00
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static void
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2004-08-26 20:35:05 +02:00
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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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struct hashentry *he, struct datahead *dh, int errval)
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1998-01-31 09:39:55 +01:00
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{
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1998-10-18 17:16:22 +02:00
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ssize_t total;
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ssize_t written;
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time_t t = time (NULL);
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1998-01-31 09:39:55 +01:00
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2004-08-26 20:35:05 +02:00
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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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1998-10-18 17:16:22 +02:00
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if (grp == NULL)
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1998-01-31 09:39:55 +01:00
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{
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2004-08-26 20:35:05 +02:00
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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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written = total = 0;
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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 09:39:55 +01:00
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2004-12-22 21:10:10 +01:00
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written = TEMP_FAILURE_RETRY (write (fd, ¬found, total));
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1998-01-31 09:39:55 +01:00
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2004-08-26 20:35:05 +02:00
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dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len);
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/* If we cannot permanently store the result, so be it. */
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if (dataset != NULL)
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{
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dataset->head.allocsize = sizeof (struct dataset) + req->key_len;
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dataset->head.recsize = total;
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dataset->head.notfound = true;
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dataset->head.nreloads = 0;
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dataset->head.usable = true;
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1998-01-31 09:39:55 +01:00
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2004-08-26 20:35:05 +02:00
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/* Compute the timeout time. */
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dataset->head.timeout = t + db->negtimeout;
|
1998-02-24 16:22:29 +01:00
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2004-08-26 20:35:05 +02:00
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/* This is the reply. */
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memcpy (&dataset->resp, ¬found, total);
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1998-01-31 09:39:55 +01:00
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2004-08-26 20:35:05 +02:00
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/* Copy the key data. */
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memcpy (dataset->strdata, key, req->key_len);
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1998-01-31 09:39:55 +01:00
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2004-09-12 12:10:48 +02:00
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/* If necessary, we also propagate the data to disk. */
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if (db->persistent)
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{
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// XXX async OK?
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uintptr_t pval = (uintptr_t) dataset & ~pagesize_m1;
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msync ((void *) pval,
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((uintptr_t) dataset & pagesize_m1)
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+ sizeof (struct dataset) + req->key_len, MS_ASYNC);
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}
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2004-08-26 20:35:05 +02:00
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/* Now get the lock to safely insert the records. */
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pthread_rwlock_rdlock (&db->lock);
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if (cache_add (req->type, &dataset->strdata, req->key_len,
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&dataset->head, true, db, owner) < 0)
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/* Ensure the data can be recovered. */
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dataset->head.usable = false;
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pthread_rwlock_unlock (&db->lock);
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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
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++db->head->addfailed;
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2004-07-18 20:24:30 +02:00
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}
|
1998-01-31 09:39:55 +01:00
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}
|
1998-07-04 12:39:13 +02:00
|
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else
|
|
|
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{
|
1998-10-18 17:16:22 +02:00
|
|
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/* Determine the I/O structure. */
|
|
|
|
size_t gr_name_len = strlen (grp->gr_name) + 1;
|
|
|
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size_t gr_passwd_len = strlen (grp->gr_passwd) + 1;
|
|
|
|
size_t gr_mem_cnt = 0;
|
2000-09-29 18:45:44 +02:00
|
|
|
uint32_t *gr_mem_len;
|
1998-10-18 17:16:22 +02:00
|
|
|
size_t gr_mem_len_total = 0;
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|
|
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char *gr_name;
|
|
|
|
char *cp;
|
2004-08-26 20:35:05 +02:00
|
|
|
const size_t key_len = strlen (key);
|
2004-12-22 21:10:10 +01:00
|
|
|
const size_t buf_len = 3 + sizeof (grp->gr_gid) + key_len + 1;
|
2004-08-26 20:35:05 +02:00
|
|
|
char *buf = alloca (buf_len);
|
1998-10-18 17:16:22 +02:00
|
|
|
ssize_t n;
|
|
|
|
size_t cnt;
|
|
|
|
|
|
|
|
/* We need this to insert the `bygid' entry. */
|
2004-08-26 20:35:05 +02:00
|
|
|
int key_offset;
|
|
|
|
n = snprintf (buf, buf_len, "%d%c%n%s", grp->gr_gid, '\0',
|
|
|
|
&key_offset, (char *) key) + 1;
|
1998-10-18 17:16:22 +02:00
|
|
|
|
|
|
|
/* Determine the length of all members. */
|
|
|
|
while (grp->gr_mem[gr_mem_cnt])
|
|
|
|
++gr_mem_cnt;
|
2000-09-29 18:45:44 +02:00
|
|
|
gr_mem_len = (uint32_t *) alloca (gr_mem_cnt * sizeof (uint32_t));
|
1998-10-18 17:16:22 +02:00
|
|
|
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 12:39:13 +02:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
written = total = (sizeof (struct dataset)
|
|
|
|
+ gr_mem_cnt * sizeof (uint32_t)
|
|
|
|
+ gr_name_len + gr_passwd_len + gr_mem_len_total);
|
|
|
|
|
|
|
|
/* 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. */
|
|
|
|
bool alloca_used = false;
|
|
|
|
dataset = NULL;
|
|
|
|
|
|
|
|
if (he == NULL)
|
|
|
|
{
|
|
|
|
dataset = (struct dataset *) mempool_alloc (db, total + n);
|
|
|
|
if (dataset == NULL)
|
|
|
|
++db->head->addfailed;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dataset == NULL)
|
|
|
|
{
|
|
|
|
/* We cannot permanently add the result in the moment. But
|
|
|
|
we can provide the result as is. Store the data in some
|
|
|
|
temporary memory. */
|
|
|
|
dataset = (struct dataset *) alloca (total + n);
|
|
|
|
|
|
|
|
/* We cannot add this record to the permanent database. */
|
|
|
|
alloca_used = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
dataset->head.allocsize = total + n;
|
|
|
|
dataset->head.recsize = total - offsetof (struct dataset, resp);
|
|
|
|
dataset->head.notfound = false;
|
|
|
|
dataset->head.nreloads = he == NULL ? 0 : (dh->nreloads + 1);
|
|
|
|
dataset->head.usable = true;
|
|
|
|
|
|
|
|
/* Compute the timeout time. */
|
|
|
|
dataset->head.timeout = t + db->postimeout;
|
|
|
|
|
|
|
|
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 09:39:55 +01:00
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
/* This is the member string length array. */
|
2000-09-29 18:45:44 +02:00
|
|
|
cp = mempcpy (cp, gr_mem_len, gr_mem_cnt * sizeof (uint32_t));
|
2000-04-28 07:12:30 +02:00
|
|
|
gr_name = cp;
|
|
|
|
cp = mempcpy (cp, grp->gr_name, gr_name_len);
|
1998-10-18 17:16:22 +02:00
|
|
|
cp = mempcpy (cp, grp->gr_passwd, gr_passwd_len);
|
1998-01-31 09:39:55 +01:00
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
for (cnt = 0; cnt < gr_mem_cnt; ++cnt)
|
|
|
|
cp = mempcpy (cp, grp->gr_mem[cnt], gr_mem_len[cnt]);
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
/* Finally the stringified GID value. */
|
1998-10-18 17:16:22 +02:00
|
|
|
memcpy (cp, buf, n);
|
2004-08-26 20:35:05 +02:00
|
|
|
char *key_copy = cp + key_offset;
|
|
|
|
assert (key_copy == (char *) rawmemchr (cp, '\0') + 1);
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
/* Now we can determine whether on refill we have to create a new
|
|
|
|
record or not. */
|
|
|
|
if (he != NULL)
|
|
|
|
{
|
|
|
|
assert (fd == -1);
|
2004-08-25 19:24:52 +02:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* We have to create a new record. Just allocate
|
|
|
|
appropriate memory and copy it. */
|
|
|
|
struct dataset *newp
|
|
|
|
= (struct dataset *) mempool_alloc (db, total + n);
|
|
|
|
if (newp != NULL)
|
|
|
|
{
|
|
|
|
/* Adjust pointers into the memory block. */
|
|
|
|
gr_name = (char *) newp + (gr_name - (char *) dataset);
|
|
|
|
cp = (char *) newp + (cp - (char *) dataset);
|
|
|
|
|
|
|
|
dataset = memcpy (newp, dataset, total + n);
|
|
|
|
alloca_used = false;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* 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 09:39:55 +01:00
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
written = TEMP_FAILURE_RETRY (write (fd, &dataset->resp, total));
|
2004-08-26 20:35:05 +02:00
|
|
|
}
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
/* Add the record to the database. But only if it has not been
|
|
|
|
stored on the stack. */
|
|
|
|
if (! alloca_used)
|
|
|
|
{
|
|
|
|
/* If necessary, we also propagate the data to disk. */
|
|
|
|
if (db->persistent)
|
2004-09-11 01:56:29 +02:00
|
|
|
{
|
|
|
|
// 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 16:22:29 +01:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
/* Now get the lock to safely insert the records. */
|
|
|
|
pthread_rwlock_rdlock (&db->lock);
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
/* 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. */
|
2004-12-22 21:10:10 +01:00
|
|
|
bool first = req->type == GETGRBYNAME;
|
2004-07-28 00:52:49 +02:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
/* If the request was by GID, add that entry first. */
|
2004-12-22 21:10:10 +01:00
|
|
|
if (req->type != GETGRBYNAME)
|
2004-08-26 20:35:05 +02:00
|
|
|
{
|
2004-09-05 08:47:36 +02:00
|
|
|
if (cache_add (GETGRBYGID, cp, key_offset, &dataset->head, true,
|
|
|
|
db, owner) < 0)
|
2004-08-26 20:35:05 +02:00
|
|
|
{
|
|
|
|
/* Could not allocate memory. Make sure the data gets
|
|
|
|
discarded. */
|
|
|
|
dataset->head.usable = false;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/* 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,
|
2004-12-22 21:10:10 +01:00
|
|
|
&dataset->head, first, db, owner) < 0)
|
2004-08-26 20:35:05 +02:00
|
|
|
{
|
|
|
|
/* Could not allocate memory. Make sure the data gets
|
|
|
|
discarded. */
|
|
|
|
dataset->head.usable = false;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
first = false;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* We have to add the value for both, byname and byuid. */
|
2004-12-22 21:10:10 +01:00
|
|
|
if (__builtin_expect (cache_add (GETGRBYNAME, gr_name, gr_name_len,
|
|
|
|
&dataset->head, first, db, owner)
|
|
|
|
== 0, 1))
|
2004-08-26 20:35:05 +02:00
|
|
|
{
|
2004-12-22 21:10:10 +01:00
|
|
|
if (req->type == GETGRBYNAME)
|
2004-09-05 08:47:36 +02:00
|
|
|
(void) cache_add (GETGRBYGID, cp, key_offset, &dataset->head,
|
2004-08-26 20:35:05 +02:00
|
|
|
req->type != GETGRBYNAME, db, owner);
|
|
|
|
}
|
|
|
|
else if (first)
|
|
|
|
/* Could not allocate memory. Make sure the data gets
|
|
|
|
discarded. */
|
|
|
|
dataset->head.usable = false;
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
out:
|
|
|
|
pthread_rwlock_unlock (&db->lock);
|
|
|
|
}
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
|
|
|
|
2001-07-17 04:38:34 +02:00
|
|
|
if (__builtin_expect (written != total, 0) && debug_level > 0)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
1998-10-18 17:16:22 +02:00
|
|
|
char buf[256];
|
|
|
|
dbg_log (_("short write in %s: %s"), __FUNCTION__,
|
|
|
|
strerror_r (errno, buf, sizeof (buf)));
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
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 17:16:22 +02:00
|
|
|
{
|
|
|
|
/* 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. */
|
2004-08-26 20:35:05 +02:00
|
|
|
size_t buflen = 1024;
|
2002-03-22 08:17:03 +01:00
|
|
|
char *buffer = (char *) alloca (buflen);
|
1998-10-18 17:16:22 +02:00
|
|
|
struct group resultbuf;
|
|
|
|
struct group *grp;
|
2002-03-22 08:03:30 +01:00
|
|
|
bool use_malloc = false;
|
2004-08-26 20:35:05 +02:00
|
|
|
int errval = 0;
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2002-03-22 08:17:03 +01:00
|
|
|
if (__builtin_expect (debug_level > 0, 0))
|
2004-08-26 20:35:05 +02:00
|
|
|
{
|
|
|
|
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 09:39:55 +01:00
|
|
|
|
2004-09-21 01:16:22 +02:00
|
|
|
#if 0
|
|
|
|
uid_t oldeuid = 0;
|
2004-08-26 20:35:05 +02:00
|
|
|
if (db->secure)
|
1999-06-11 22:58:21 +02:00
|
|
|
{
|
|
|
|
oldeuid = geteuid ();
|
2004-09-20 02:16:11 +02:00
|
|
|
pthread_seteuid_np (uid);
|
1999-06-11 22:58:21 +02:00
|
|
|
}
|
2004-09-21 01:16:22 +02:00
|
|
|
#endif
|
1999-06-11 22:58:21 +02:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
while (lookup (req->type, key, &resultbuf, buffer, buflen, &grp) != 0
|
|
|
|
&& (errval = errno) == ERANGE)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
2002-03-22 08:03:30 +01:00
|
|
|
char *old_buffer = buffer;
|
1998-10-18 17:16:22 +02:00
|
|
|
errno = 0;
|
2004-12-22 21:10:10 +01:00
|
|
|
#define INCR 1024
|
2002-03-22 08:03:30 +01:00
|
|
|
|
|
|
|
if (__builtin_expect (buflen > 32768, 0))
|
|
|
|
{
|
2004-12-22 21:10:10 +01:00
|
|
|
buflen += INCR;
|
2002-03-22 08:03:30 +01:00
|
|
|
buffer = (char *) realloc (use_malloc ? buffer : NULL, buflen);
|
|
|
|
if (buffer == NULL)
|
|
|
|
{
|
|
|
|
/* We ran out of memory. We cannot do anything but
|
|
|
|
sending a negative response. In reality this should
|
|
|
|
never happen. */
|
|
|
|
grp = NULL;
|
|
|
|
buffer = old_buffer;
|
2004-08-26 20:35:05 +02:00
|
|
|
|
|
|
|
/* 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;
|
2002-03-22 08:03:30 +01:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
use_malloc = true;
|
|
|
|
}
|
|
|
|
else
|
2003-01-15 11:52:50 +01:00
|
|
|
/* Allocate a new buffer on the stack. If possible combine it
|
|
|
|
with the previously allocated buffer. */
|
2004-12-22 21:10:10 +01:00
|
|
|
buffer = (char *) extend_alloca (buffer, buflen, buflen + INCR);
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
|
|
|
|
2004-09-21 01:16:22 +02:00
|
|
|
#if 0
|
2004-08-26 20:35:05 +02:00
|
|
|
if (db->secure)
|
2004-09-20 02:16:11 +02:00
|
|
|
pthread_seteuid_np (oldeuid);
|
2004-09-21 01:16:22 +02:00
|
|
|
#endif
|
1999-06-11 22:58:21 +02:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
cache_addgr (db, fd, req, keystr, grp, uid, he, dh, errval);
|
2002-03-22 08:03:30 +01:00
|
|
|
|
|
|
|
if (use_malloc)
|
|
|
|
free (buffer);
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
void
|
2004-08-26 20:35:05 +02:00
|
|
|
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);
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|
|
|
}
|
|
|
|
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|
|
|
|
|
|
|
void
|
|
|
|
readdgrbyname (struct database_dyn *db, struct hashentry *he,
|
|
|
|
struct datahead *dh)
|
|
|
|
{
|
|
|
|
request_header req =
|
|
|
|
{
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|
|
|
.type = GETGRBYNAME,
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|
|
|
.key_len = he->len
|
|
|
|
};
|
|
|
|
union keytype u = { .v = db->data + he->key };
|
|
|
|
|
|
|
|
addgrbyX (db, -1, &req, u, db->data + he->key, he->owner, he, dh);
|
|
|
|
}
|
|
|
|
|
|
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|
|
|
void
|
|
|
|
addgrbygid (struct database_dyn *db, int fd, request_header *req,
|
1999-06-11 22:58:21 +02:00
|
|
|
void *key, uid_t uid)
|
1998-10-18 17:16:22 +02:00
|
|
|
{
|
2001-11-27 04:47:06 +01:00
|
|
|
char *ep;
|
2004-08-26 20:35:05 +02:00
|
|
|
gid_t gid = strtoul ((char *) key, &ep, 10);
|
2002-03-22 08:03:30 +01:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
if (*(char *) key == '\0' || *ep != '\0') /* invalid numeric uid */
|
2001-11-27 04:47:06 +01:00
|
|
|
{
|
|
|
|
if (debug_level > 0)
|
2002-03-22 08:17:03 +01:00
|
|
|
dbg_log (_("Invalid numeric gid \"%s\"!"), (char *) key);
|
2001-11-27 04:47:06 +01:00
|
|
|
|
|
|
|
errno = EINVAL;
|
|
|
|
return;
|
|
|
|
}
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
union keytype u = { .g = gid };
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
addgrbyX (db, fd, req, u, key, uid, NULL, NULL);
|
|
|
|
}
|
1999-06-11 22:58:21 +02:00
|
|
|
|
2002-03-22 08:03:30 +01:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
void
|
|
|
|
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 09:39:55 +01:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
/* Since the key has been added before it must be OK. */
|
|
|
|
assert (*(db->data + he->key) != '\0' && *ep == '\0');
|
1999-06-11 22:58:21 +02:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
request_header req =
|
|
|
|
{
|
|
|
|
.type = GETGRBYGID,
|
|
|
|
.key_len = he->len
|
|
|
|
};
|
|
|
|
union keytype u = { .g = gid };
|
2002-03-22 08:03:30 +01:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
addgrbyX (db, -1, &req, u, db->data + he->key, he->owner, he, dh);
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|