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cc3fa75512
1997-11-11 21:30 Ulrich Drepper <drepper@cygnus.com> * include/sys/stat.h: Define stat, fstat, lstat and *64 variants as macros so the the library compiles correctly even without optimization. * io/fstat.c: Undef fstat. * io/fstat64.c: Undef fstat64 * io/lstat.c: Undef lstat. * io/lstat64.c: Undef lstat64 * io/stat.c: Undef stat. * io/stat64.c: Undef stat64 * io/fts.c: Include <include/sys/stat.h> to get macro definitions. * io/ftw.c: Likewise. * io/getdirname.c: Likewise. * Makefile (install): Run test-installation.pl if possible. * db2/Makefile: Update from db-2.3.12. * db2/db.h: Likewise. * db2/db_int.h: Likewise. * db2/btree/bt_cursor.c: Likewise. * db2/btree/bt_delete.c: Likewise. * db2/btree/bt_open.c: Likewise. * db2/btree/bt_put.c: Likewise. * db2/btree/bt_rec.c: Likewise. * db2/btree/bt_recno.c: Likewise. * db2/btree/bt_search.c: Likewise. * db2/btree/bt_split.c: Likewise. * db2/btree/bt_stat.c: Likewise. * db2/btree/btree.src: Likewise. * db2/btree/btree_auto.c: Likewise. * db2/btree/bt_cursor.c: Likewise. * db2/btree/bt_delete.c: Likewise. * db2/btree/bt_open.c: Likewise. * db2/btree/bt_put.c: Likewise. * db2/btree/bt_rec.c: Likewise. * db2/btree/bt_recno.c: Likewise. * db2/btree/bt_search.c: Likewise. * db2/btree/bt_split.c: Likewise. * db2/btree/bt_stat.c: Likewise. * db2/btree/btree.src: Likewise. * db2/btree/btree_auto.c: Likewise. * db2/common/db_appinit.c: Likewise. * db2/common/db_apprec.c: Likewise. * db2/common/db_byteorder.c: Likewise. * db2/common/db_region.c: Likewise. * db2/db/db.c: Likewise * db2/db/db.src: Likewise * db2/db/db_auto.c: Likewise * db2/db/db_dispatch.c: Likewise * db2/db/db_dup.c: Likewise * db2/db/db_overflow.c: Likewise * db2/db/db_pr.c: Likewise * db2/db/db_rec.c: Likewise * db2/db/db_ret.c: Likewise * db2/db/db_thread.c: Likewise * db2/db185/db185.c: Likewise. * db2/hash/hash.c: Likewise. * db2/hash/hash.src: Likewise. * db2/hash/hash_auto.c: Likewise. * db2/hash/hash_dup.c: Likewise. * db2/hash/hash_page.c: Likewise. * db2/hash/hash_rec.c: Likewise. * db2/include/btree_auto.h: Likewise. * db2/include/btree_ext.h: Likewise. * db2/include/clib_ext.h: Likewise. * db2/include/common_ext.h: Likewise. * db2/include/db.h.src: Likewise. * db2/include/db_am.h: Likewise. * db2/include/db_auto.h: Likewise. * db2/include/db_cxx.h: Likewise. * db2/include/db_ext.h: Likewise. * db2/include/db_int.h.src: Likewise. * db2/include/hash.h: Likewise. * db2/include/hash_auto.h: Likewise. * db2/include/hash_ext.h: Likewise. * db2/include/lock.h: Likewise. * db2/include/lock_ext.h: Likewise. * db2/include/log.h: Likewise. * db2/include/log_ext.h: Likewise. * db2/include/mp.h: Likewise. * db2/include/mp_ext.h: Likewise. * db2/include/mutex_ext.h: Likewise. * db2/include/os_ext.h: Likewise. * db2/include/os_func.h: Likewise. * db2/include/txn.h: Likewise. * db2/include/txn_ext.h: Likewise. * db2/lock/lock.c: Likewise. * db2/lock/lock_deadlock.c: Likewise. * db2/log/log.c: Likewise. * db2/log/log_archive.c: Likewise. * db2/log/log_auto.c: Likewise. * db2/log/log_findckp.c: Likewise. * db2/log/log_get.c: Likewise. * db2/log/log_put.c: Likewise. * db2/log/log_rec.c: Likewise. * db2/log/log_register.c: Likewise. * db2/mp/mp_bh.c: Likewise. * db2/mp/mp_fget.c: Likewise. * db2/mp/mp_fopen.c: Likewise. * db2/mp/mp_fput.c: Likewise. * db2/mp/mp_fset.c: Likewise. * db2/mp/mp_open.c: Likewise. * db2/mp/mp_pr.c: Likewise. * db2/mp/mp_region.c: Likewise. * db2/mp/mp_sync.c: Likewise. * db2/mutex/mutex.c: Likewise. * db2/os/os_abs.c: Likewise. * db2/os/os_dir.c: Likewise. * db2/os/os_fid.c: Likewise. * db2/os/os_fsync.c: Likewise. * db2/os/os_func.c: Likewise. * db2/os/os_map.c: Likewise. * db2/os/os_oflags.c: Likewise. * db2/os/os_open.c: Likewise. * db2/os/os_rpath.c: Likewise. * db2/os/os_rw.c: Likewise. * db2/os/os_seek.c: Likewise. * db2/os/os_sleep.c: Likewise. * db2/os/os_stat.c: Likewise. * db2/os/os_unlink.c: Likewise. * db2/progs/db_deadlock/db_deadlock.c: Likewise. * db2/progs/db_dump/db_dump.c: Likewise. * db2/progs/db_load/db_load.c: Likewise. * db2/progs/db_recover/db_recover.c: Likewise. * db2/progs/db_stat/db_stat.c: Likewise. * db2/txn/txn.c: Likewise. * db2/txn/txn_auto.c: Likewise. * db2/txn/txn_rec.c: Likewise. * db2/os/db_os_abs.c: Removed. * db2/os/db_os_dir.c: Removed. * db2/os/db_os_fid.c: Removed. * db2/os/db_os_lseek.c: Removed. * db2/os/db_os_mmap.c: Removed. * db2/os/db_os_open.c: Removed. * db2/os/db_os_rw.c: Removed. * db2/os/db_os_sleep.c: Removed. * db2/os/db_os_stat.c: Removed. * db2/os/db_os_unlink.c: Removed. * libio/stdio.h (fopen): Add __restrict to parameters. * manual/process.texi (system): Describe behaviour for NULL argument. * stdio-common/printf-parse.h: Parse hh modifier. * stdio-common/vfprintf.c: Handle hh modifier. * stdio-common/vfscanf.c: Likewise. * manual/stdio.texi: Describe hh modifier for scanf/printf. * math/complex.h: Don't define _Imaginary_I, but instead _Complex_I. gcc does no yet know the `imaginary' keyword. * math/test-math.c: Add little test for know gcc bug. * math/tgmath.h: Make complex versions of log10() only available if __USE_GNU. * stdlib/test-canon.c: Fix typo. * sysdeps/generic/setenv.c: Avoid compilation warnings. Reported by Jim Meyering. * sysdeps/generic/bits/errno.h: EILSEQ is an ISO C error number. * sysdeps/mach/hurd/bits/errno.h: Likewise. * sysdeps/standalone/bits/errno.h: Likewise. * sysdeps/unix/sysv/linux/bits/errno.h: Likewise. * sysdeps/i386/i586/memcpy.S: New file. * sysdeps/i386/i586/mempcpy.S: New file. * sysdeps/i386/i586/memset.S: Fix typo. * sysdeps/posix/getcwd.c: Define HAVE_MEMPCPY for _LIBC. Add casts. * sysdeps/posix/system.c: Add comment to explain code. * sysdeps/wordsize-32/inttypes.h: Include <stddef.h> for wchar_t. Define PTRDIFF_{MIN,MAX}, SIG_ATOMIC_{MIN,MAX}, SIZE_MAX, WCHAR_{MIN,MAX}, WINT_{MIN,MAX}. Define wcstoimax, wcstoumax. * sysdeps/wordsize-64/inttypes.h: Likewise. * wcsmbs/wchar.h: Define WCHAR_{MIN,MAX} if not already defined. Declare __wcsto{l,ul,ll,ull}_internal only if not already done. * time/Makefile (routines): Add strfxtime. * time/strftime.c: Implement %F and %f format. * time/strfxtime.c: New file. * time/time.h: Define new types and symbols from ISO C 9X. * time/mktime.c: Little comment correction. 1997-11-10 Andreas Jaeger <aj@arthur.rhein-neckar.de> * sysdeps/libm-ieee754/s_sincosl.c: Fix typo. * sysdeps/libm-ieee754/s_tanl.c: Fix typo. * sysdeps/libm-ieee754/s_floorl.c: Correct typos. * sysdeps/libm-ieee754/e_remainderl.c: Replace EXTRACT_LDOUBLE_WORDS by GET_LDOUBLE_WORDS. * sysdeps/libm-ieee754/e_atan2l.c: Replace EXTRACT_LDOUBLE_WORDS by GET_LDOUBLE_WORDS. * sysdeps/libm-ieee754/s_scalbnl.c: Replace ";" by "," for correct variable declaration. * sysdeps/libm-ieee754/s_scalblnl.c: Likewise. * sysdeps/libm-ieee754/s_lrint.c (__lrint): Correct function. * math/libm-test.c (sqrt_test): Add test for sqrt (0.25). (asin_test): Add more test. 1997-11-10 23:34 Ulrich Drepper <drepper@cygnus.com> * sysdeps/libm-ieee754/e_asin.c: Add braces to make code clearer and to not confuse the poor compiler. * sysdeps/libm-ieee754/e_asinf.c: Likewise. Reported by vertex@cagent.com. 1997-11-09 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/dl-lookup.c (do_lookup): Don't accept the base version if we require a specific one. * libio/oldfreopen.c: Bind old symbols to version GLIBC_2.0. * libio/oldiofopen.c: Likewise. * libio/oldstdfiles.c: Likewise. * libc.map: Export them. 1997-11-10 07:40 H.J. Lu <hjl@gnu.ai.mit.edu> * stdlib/exit.c (exit): Handle recursive calls to exit (). 1997-11-09 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/fpu/s_llrint.c: Fixed to take double argument instead of long double. * sysdeps/m68k/fpu/s_llrintf.c: New file. * sysdeps/m68k/fpu/s_llrintl.c: New file. * sysdeps/libm-ieee754/s_llrint.c: Make compilable and fix overflow condition. * sysdeps/libm-ieee754/s_llrintf.c: Fix overflow condition. * sysdeps/libm-ieee754/s_llrintl.c: Likewise. * sysdeps/libm-ieee754/s_llround.c: Likewise. * sysdeps/libm-ieee754/s_llroundf.c: Likewise. * sysdeps/libm-ieee754/s_llroundl.c: Likewise. * sysdeps/libm-ieee754/s_lrint.c: Likewise. * sysdeps/libm-ieee754/s_lrintf.c: Likewise. * sysdeps/libm-ieee754/s_lrintl.c: Likewise. * sysdeps/libm-ieee754/s_lround.c: Likewise. * sysdeps/libm-ieee754/s_lroundf.c: Likewise. * sysdeps/libm-ieee754/s_lroundl.c: Likewise. * math/libm-test.c: Test all three variants of lrint and llrint. Fix typos in lround and llround tests. Add tests for boundary cases for lrint and llround. 1997-11-08 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * manual/arith.texi: Misc doc fixes. * manual/ctype.texi: Likewise. * manual/pattern.texi: Likewise. * manual/terminal.texi: Likewise. 1997-11-08 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/xstatconv.c: Use struct assignment instead of memcpy to let the compiler use whatever it regards as optimal. * sysdeps/unix/sysv/linux/alpha/xstatconv.c: Likewise. 1997-11-08 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/Makefile (sysdep_headers) [$(subdir)=misc]: Add sys/prctl.h. * sysdeps/unix/sysv/linux/Dist: Distribute it. 1997-11-08 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * io/ftwtest-sh: Don't use the unknown which command, instead try pwd as /bin/pwd and /usr/bin/pwd. 1997-11-08 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * manual/maint.texi (Tools for Installation): Don't recommend broken version 3.76.1 of make. (Porting): Fix wording. 1997-11-06 06:13 H.J. Lu <hjl@gnu.ai.mit.edu> * config.make.in (build-pic-default): New, defined with pic_default. * configure.in (pic_default): New, set to yes if PIC is default. * Makeconfig (CPPFLAGS-.o, CPPFLAGS-.op, CPPFLAGS-.og, CPPFLAGS-.ob): Add -DPIC if $(build-pic-default) is yes. 1997-11-09 18:15 Ulrich Drepper <drepper@cygnus.com> * Makerules (libc.so): Fix typo. * csu/Makefile (CFLAGS-initfini.s): Correctly fix moving function definition. Patch by Zack Weinberg <zack@rabi.phys.columbia.edu>. * stdlib/strtod.c: Handle numbers like 0.0e10000 correctly which produce ±0.0. Reported by Joe Keane <jgk@jgk.org>. * sysdeps/libm-ieee754/s_ceill.c: Fix typos. * sysdeps/libm-ieee754/s_llrint.c: Correct code, it never worked. 1997-11-06 07:00 H.J. Lu <hjl@gnu.ai.mit.edu> * sysdeps/unix/sysv/i386/i686/time.S: Removed. 1997-11-08 14:07 Thorsten Kukuk <kukuk@vt.uni-paderborn.de> * nis/libnsl.map: Add __do_niscall2 for nis_cachemgr. * nis/nis_call.c: Set UDP resend timeout correct. * nis/nss_compat/compat-grp.c: Rewritten to make it faster. * nis/nss_compat/compat-pwd.c: Likewise. * nis/nss_compat/compat-spwd.c: Likewise. * nis/ypclnt.c: Fix UDP resend timeout, fix yp_bind/do_ypcall interaction. * inet/protocols/routed.h: Include sys/socket.h. * inet/protocols/talkd.h: Likewise. * inet/protocols/timed.h: Include rpc/types.h. * sunrpc/rpc/pmap_clnt.h: Include rpc/clnt.h. 1997-11-06 01:39 Ulrich Drepper <drepper@cygnus.com> * Makerules (libc.so): Add missing closing brace. 1997-11-05 Brendan Kehoe <brendan@lisa.cygnus.com> * libio.h (__P): Name its arg `p' instead of `params'. This was added solely to work around problems with the definition of __P in the Solaris math.h header.
352 lines
8.1 KiB
C
352 lines
8.1 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1996, 1997
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* Sleepycat Software. All rights reserved.
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*/
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#include "config.h"
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#ifndef lint
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static const char sccsid[] = "@(#)log_get.c 10.21 (Sleepycat) 10/25/97";
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#endif /* not lint */
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#endif
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#include "db_int.h"
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#include "shqueue.h"
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#include "db_page.h"
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#include "log.h"
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#include "hash.h"
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#include "common_ext.h"
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/*
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* log_get --
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* Get a log record.
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*/
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int
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log_get(dblp, alsn, dbt, flags)
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DB_LOG *dblp;
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DB_LSN *alsn;
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DBT *dbt;
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int flags;
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{
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LOG *lp;
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int ret;
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/* Validate arguments. */
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#define OKFLAGS (DB_CHECKPOINT | \
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DB_CURRENT | DB_FIRST | DB_LAST | DB_NEXT | DB_PREV | DB_SET)
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if (flags != 0) {
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if ((ret =
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__db_fchk(dblp->dbenv, "log_get", flags, OKFLAGS)) != 0)
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return (ret);
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switch (flags) {
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case DB_CHECKPOINT:
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case DB_CURRENT:
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case DB_FIRST:
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case DB_LAST:
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case DB_NEXT:
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case DB_PREV:
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case DB_SET:
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case 0:
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break;
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default:
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return (__db_ferr(dblp->dbenv, "log_get", 1));
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}
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}
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if (F_ISSET(dblp, DB_AM_THREAD)) {
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if (LF_ISSET(DB_NEXT | DB_PREV | DB_CURRENT))
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return (__db_ferr(dblp->dbenv, "log_get", 1));
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if (!F_ISSET(dbt, DB_DBT_USERMEM | DB_DBT_MALLOC))
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return (__db_ferr(dblp->dbenv, "threaded data", 1));
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}
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lp = dblp->lp;
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LOCK_LOGREGION(dblp);
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/*
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* If we get one of the log's header records, repeat the operation.
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* This assumes that applications don't ever request the log header
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* records by LSN, but that seems reasonable to me.
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*/
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ret = __log_get(dblp, alsn, dbt, flags, 0);
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if (ret == 0 && alsn->offset == 0) {
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switch (flags) {
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case DB_FIRST:
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flags = DB_NEXT;
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break;
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case DB_LAST:
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flags = DB_PREV;
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break;
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}
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ret = __log_get(dblp, alsn, dbt, flags, 0);
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}
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UNLOCK_LOGREGION(dblp);
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return (ret);
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}
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/*
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* __log_get --
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* Get a log record; internal version.
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*
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* PUBLIC: int __log_get __P((DB_LOG *, DB_LSN *, DBT *, int, int));
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*/
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int
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__log_get(dblp, alsn, dbt, flags, silent)
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DB_LOG *dblp;
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DB_LSN *alsn;
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DBT *dbt;
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int flags, silent;
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{
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DB_LSN nlsn;
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HDR hdr;
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LOG *lp;
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size_t len;
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ssize_t nr;
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int cnt, ret;
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char *np, *tbuf;
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const char *fail;
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void *p, *shortp;
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lp = dblp->lp;
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fail = np = tbuf = NULL;
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nlsn = dblp->c_lsn;
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switch (flags) {
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case DB_CHECKPOINT:
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nlsn = dblp->lp->c_lsn;
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if (IS_ZERO_LSN(nlsn)) {
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__db_err(dblp->dbenv,
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"log_get: unable to find checkpoint record: no checkpoint set.");
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ret = ENOENT;
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goto err2;
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}
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break;
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case DB_NEXT: /* Next log record. */
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if (!IS_ZERO_LSN(nlsn)) {
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/* Increment the cursor by the cursor record size. */
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nlsn.offset += dblp->c_len;
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break;
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}
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/* FALLTHROUGH */
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case DB_FIRST: /* Find the first log record. */
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/*
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* Find any log file. Note, we may have only entered records
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* in the buffer, and not yet written a log file.
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*/
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if ((ret = __log_find(dblp, &cnt)) != 0) {
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__db_err(dblp->dbenv,
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"log_get: unable to find the first record: no log files found.");
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goto err2;
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}
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/* If there's anything in the buffer, it belongs to file 1. */
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if (cnt == 0)
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cnt = 1;
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/* Now go backwards to find the smallest one. */
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for (; cnt > 1; --cnt)
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if (__log_valid(dblp, NULL, cnt) != 0) {
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++cnt;
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break;
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}
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nlsn.file = cnt;
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nlsn.offset = 0;
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break;
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case DB_CURRENT: /* Current log record. */
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break;
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case DB_PREV: /* Previous log record. */
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if (!IS_ZERO_LSN(nlsn)) {
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/* If at start-of-file, move to the previous file. */
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if (nlsn.offset == 0) {
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if (nlsn.file == 1 ||
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__log_valid(dblp, NULL, nlsn.file - 1) != 0)
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return (DB_NOTFOUND);
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--nlsn.file;
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nlsn.offset = dblp->c_off;
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} else
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nlsn.offset = dblp->c_off;
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break;
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}
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/* FALLTHROUGH */
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case DB_LAST: /* Last log record. */
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nlsn.file = lp->lsn.file;
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nlsn.offset = lp->lsn.offset - lp->len;
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break;
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case DB_SET: /* Set log record. */
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nlsn = *alsn;
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break;
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}
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retry:
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/* Return 1 if the request is past end-of-file. */
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if (nlsn.file > lp->lsn.file ||
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(nlsn.file == lp->lsn.file && nlsn.offset >= lp->lsn.offset))
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return (DB_NOTFOUND);
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/* If we've switched files, discard the current fd. */
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if (dblp->c_lsn.file != nlsn.file && dblp->c_fd != -1) {
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(void)__db_close(dblp->c_fd);
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dblp->c_fd = -1;
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}
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/* If the entire record is in the in-memory buffer, copy it out. */
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if (nlsn.file == lp->lsn.file && nlsn.offset >= lp->w_off) {
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/* Copy the header. */
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p = lp->buf + (nlsn.offset - lp->w_off);
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memcpy(&hdr, p, sizeof(HDR));
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/* Copy the record. */
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len = hdr.len - sizeof(HDR);
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if ((ret = __db_retcopy(dbt, (u_int8_t *)p + sizeof(HDR),
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len, &dblp->c_dbt.data, &dblp->c_dbt.ulen, NULL)) != 0)
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goto err1;
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goto cksum;
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}
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/* Acquire a file descriptor. */
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if (dblp->c_fd == -1) {
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if ((ret = __log_name(dblp, nlsn.file, &np)) != 0)
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goto err1;
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if ((ret = __db_open(np, DB_RDONLY | DB_SEQUENTIAL,
|
|
DB_RDONLY | DB_SEQUENTIAL, 0, &dblp->c_fd)) != 0) {
|
|
fail = np;
|
|
goto err1;
|
|
}
|
|
__db_free(np);
|
|
np = NULL;
|
|
}
|
|
|
|
/* Seek to the header offset and read the header. */
|
|
if ((ret = __db_seek(dblp->c_fd, 0, 0, nlsn.offset, SEEK_SET)) != 0) {
|
|
fail = "seek";
|
|
goto err1;
|
|
}
|
|
if ((ret = __db_read(dblp->c_fd, &hdr, sizeof(HDR), &nr)) != 0) {
|
|
fail = "read";
|
|
goto err1;
|
|
}
|
|
if (nr == sizeof(HDR))
|
|
shortp = NULL;
|
|
else {
|
|
/* If read returns EOF, try the next file. */
|
|
if (nr == 0) {
|
|
if (flags != DB_NEXT || nlsn.file == lp->lsn.file)
|
|
goto corrupt;
|
|
|
|
/* Move to the next file. */
|
|
++nlsn.file;
|
|
nlsn.offset = 0;
|
|
goto retry;
|
|
}
|
|
|
|
/*
|
|
* If read returns a short count the rest of the record has
|
|
* to be in the in-memory buffer.
|
|
*/
|
|
if (lp->b_off < sizeof(HDR) - nr)
|
|
goto corrupt;
|
|
|
|
/* Get the rest of the header from the in-memory buffer. */
|
|
memcpy((u_int8_t *)&hdr + nr, lp->buf, sizeof(HDR) - nr);
|
|
shortp = lp->buf + (sizeof(HDR) - nr);
|
|
}
|
|
|
|
/*
|
|
* Check for buffers of 0's, that's what we usually see during
|
|
* recovery, although it's certainly not something on which we
|
|
* can depend.
|
|
*/
|
|
if (hdr.len <= sizeof(HDR))
|
|
goto corrupt;
|
|
len = hdr.len - sizeof(HDR);
|
|
|
|
/* If we've already moved to the in-memory buffer, fill from there. */
|
|
if (shortp != NULL) {
|
|
if (lp->b_off < ((u_int8_t *)shortp - lp->buf) + len)
|
|
goto corrupt;
|
|
if ((ret = __db_retcopy(dbt, shortp, len,
|
|
&dblp->c_dbt.data, &dblp->c_dbt.ulen, NULL)) != 0)
|
|
goto err1;
|
|
goto cksum;
|
|
}
|
|
|
|
/* Allocate temporary memory to hold the record. */
|
|
if ((tbuf = (char *)__db_malloc(len)) == NULL) {
|
|
ret = ENOMEM;
|
|
goto err1;
|
|
}
|
|
|
|
/*
|
|
* Read the record into the buffer. If read returns a short count,
|
|
* there was an error or the rest of the record is in the in-memory
|
|
* buffer. Note, the information may be garbage if we're in recovery,
|
|
* so don't read past the end of the buffer's memory.
|
|
*/
|
|
if ((ret = __db_read(dblp->c_fd, tbuf, len, &nr)) != 0) {
|
|
fail = "read";
|
|
goto err1;
|
|
}
|
|
if (len - nr > sizeof(lp->buf))
|
|
goto corrupt;
|
|
if (nr != (ssize_t)len) {
|
|
if (lp->b_off < len - nr)
|
|
goto corrupt;
|
|
|
|
/* Get the rest of the record from the in-memory buffer. */
|
|
memcpy((u_int8_t *)tbuf + nr, lp->buf, len - nr);
|
|
}
|
|
|
|
/* Copy the record into the user's DBT. */
|
|
if ((ret = __db_retcopy(dbt, tbuf, len,
|
|
&dblp->c_dbt.data, &dblp->c_dbt.ulen, NULL)) != 0)
|
|
goto err1;
|
|
__db_free(tbuf);
|
|
tbuf = NULL;
|
|
|
|
cksum: if (hdr.cksum != __ham_func4(dbt->data, dbt->size)) {
|
|
if (!silent)
|
|
__db_err(dblp->dbenv, "log_get: checksum mismatch");
|
|
goto corrupt;
|
|
}
|
|
|
|
/* Update the cursor and the return lsn. */
|
|
dblp->c_off = hdr.prev;
|
|
dblp->c_len = hdr.len;
|
|
dblp->c_lsn = *alsn = nlsn;
|
|
|
|
return (0);
|
|
|
|
corrupt:/*
|
|
* This is the catchall -- for some reason we didn't find enough
|
|
* information or it wasn't reasonable information, and it wasn't
|
|
* because a system call failed.
|
|
*/
|
|
ret = EIO;
|
|
fail = "read";
|
|
|
|
err1: if (!silent)
|
|
if (fail == NULL)
|
|
__db_err(dblp->dbenv, "log_get: %s", strerror(ret));
|
|
else
|
|
__db_err(dblp->dbenv,
|
|
"log_get: %s: %s", fail, strerror(ret));
|
|
err2: if (np != NULL)
|
|
__db_free(np);
|
|
if (tbuf != NULL)
|
|
__db_free(tbuf);
|
|
return (ret);
|
|
}
|