glibc/db2/log/log.c
Ulrich Drepper cc3fa75512 Update.
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.
1997-11-12 00:06:02 +00:00

515 lines
11 KiB
C

/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996, 1997
* Sleepycat Software. All rights reserved.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)log.c 10.33 (Sleepycat) 11/2/97";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#endif
#include "db_int.h"
#include "shqueue.h"
#include "db_shash.h"
#include "log.h"
#include "db_dispatch.h"
#include "txn_auto.h"
#include "common_ext.h"
static int __log_recover __P((DB_LOG *));
/*
* log_open --
* Initialize and/or join a log.
*/
int
log_open(path, flags, mode, dbenv, lpp)
const char *path;
int flags;
int mode;
DB_ENV *dbenv;
DB_LOG **lpp;
{
DB_LOG *dblp;
LOG *lp;
size_t len;
int fd, newregion, ret, retry_cnt;
/* Validate arguments. */
#ifdef HAVE_SPINLOCKS
#define OKFLAGS (DB_CREATE | DB_THREAD)
#else
#define OKFLAGS (DB_CREATE)
#endif
if ((ret = __db_fchk(dbenv, "log_open", flags, OKFLAGS)) != 0)
return (ret);
/*
* We store 4-byte offsets into the file, so the maximum file
* size can't be larger than that.
*/
if (dbenv != NULL && dbenv->lg_max > UINT32_T_MAX) {
__db_err(dbenv, "log_open: maximum file size too large");
return (EINVAL);
}
/* Create and initialize the DB_LOG structure. */
if ((dblp = (DB_LOG *)__db_calloc(1, sizeof(DB_LOG))) == NULL)
return (ENOMEM);
if (path != NULL && (dblp->dir = __db_strdup(path)) == NULL) {
__db_free(dblp);
return (ENOMEM);
}
dblp->dbenv = dbenv;
dblp->lfd = -1;
ZERO_LSN(dblp->c_lsn);
dblp->c_fd = -1;
/*
* The log region isn't fixed size because we store the registered
* file names there. Make it fairly large so that we don't have to
* grow it.
*/
len = 30 * 1024;
/* Map in the region. */
retry_cnt = newregion = 0;
retry: if (LF_ISSET(DB_CREATE)) {
ret = __db_rcreate(dbenv, DB_APP_LOG, path,
DB_DEFAULT_LOG_FILE, mode, len, &fd, &dblp->maddr);
if (ret == 0) {
/* Put the LOG structure first in the region. */
lp = dblp->maddr;
/* Initialize the rest of the region as free space. */
dblp->addr = (u_int8_t *)dblp->maddr + sizeof(LOG);
__db_shalloc_init(dblp->addr, len - sizeof(LOG));
/* Initialize the LOG structure. */
lp->persist.lg_max = dbenv == NULL ? 0 : dbenv->lg_max;
if (lp->persist.lg_max == 0)
lp->persist.lg_max = DEFAULT_MAX;
lp->persist.magic = DB_LOGMAGIC;
lp->persist.version = DB_LOGVERSION;
lp->persist.mode = mode;
SH_TAILQ_INIT(&lp->fq);
/* Initialize LOG LSNs. */
lp->lsn.file = 1;
lp->lsn.offset = 0;
newregion = 1;
} else if (ret != EEXIST)
goto err;
}
/* If we didn't or couldn't create the region, try and join it. */
if (!newregion &&
(ret = __db_ropen(dbenv, DB_APP_LOG,
path, DB_DEFAULT_LOG_FILE, 0, &fd, &dblp->maddr)) != 0) {
/*
* If we fail because the file isn't available, wait a
* second and try again.
*/
if (ret == EAGAIN && ++retry_cnt < 3) {
(void)__db_sleep(1, 0);
goto retry;
}
goto err;
}
/* Set up the common information. */
dblp->lp = dblp->maddr;
dblp->addr = (u_int8_t *)dblp->maddr + sizeof(LOG);
dblp->fd = fd;
/* Initialize thread information. */
if (LF_ISSET(DB_THREAD)) {
F_SET(dblp, DB_AM_THREAD);
if (!newregion)
LOCK_LOGREGION(dblp);
if ((ret = __db_shalloc(dblp->addr,
sizeof(db_mutex_t), MUTEX_ALIGNMENT, &dblp->mutexp)) == 0)
(void)__db_mutex_init(dblp->mutexp, -1);
if (!newregion)
UNLOCK_LOGREGION(dblp);
if (ret != 0) {
(void)log_close(dblp);
if (newregion)
(void)log_unlink(path, 1, dbenv);
return (ret);
}
}
/*
* If doing recovery, try and recover any previous log files
* before releasing the lock.
*/
if (newregion) {
ret = __log_recover(dblp);
UNLOCK_LOGREGION(dblp);
if (ret != 0) {
(void)log_close(dblp);
(void)log_unlink(path, 1, dbenv);
return (ret);
}
}
*lpp = dblp;
return (0);
err: /*
* We never get here with an allocated thread-mutex, so we do
* not have to worry about freeing it.
*/
FREE(dblp, sizeof(DB_LOG));
return (ret);
}
/*
* __log_recover --
* Recover a log.
*/
static int
__log_recover(dblp)
DB_LOG *dblp;
{
DBT dbt;
DB_LSN lsn;
LOG *lp;
u_int32_t chk;
int cnt, found_checkpoint, ret;
lp = dblp->lp;
/*
* Find a log file. If none exist, we simply return, leaving
* everything initialized to a new log.
*/
if ((ret = __log_find(dblp, &cnt)) != 0)
return (ret);
if (cnt == 0)
return (0);
/* We have a log file name, find the last one. */
while (cnt < MAXLFNAME)
if (__log_valid(dblp, lp, ++cnt) != 0) {
--cnt;
break;
}
/*
* We have the last useful log file and we've loaded any persistent
* information. Pretend that the log is larger than it can possibly
* be, and read this file, looking for a checkpoint and its end.
*/
dblp->c_lsn.file = cnt;
dblp->c_lsn.offset = 0;
lsn = dblp->c_lsn;
lp->lsn.file = cnt + 1;
lp->lsn.offset = 0;
/* Set the cursor. Shouldn't fail, leave error messages on. */
memset(&dbt, 0, sizeof(dbt));
if ((ret = __log_get(dblp, &lsn, &dbt, DB_SET, 0)) != 0)
return (ret);
/*
* Read to the end of the file, saving checkpoints. This will fail
* at some point, so turn off error messages.
*/
found_checkpoint = 0;
while (__log_get(dblp, &lsn, &dbt, DB_NEXT, 1) == 0) {
if (dbt.size < sizeof(u_int32_t))
continue;
memcpy(&chk, dbt.data, sizeof(u_int32_t));
if (chk == DB_txn_ckp) {
lp->c_lsn = lsn;
found_checkpoint = 1;
}
}
/*
* We know where the end of the log is. Since that record is on disk,
* it's also the last-synced LSN.
*/
lp->lsn = lsn;
lp->lsn.offset += dblp->c_len;
lp->s_lsn = lp->lsn;
/* Set up the current buffer information, too. */
lp->len = dblp->c_len;
lp->b_off = 0;
lp->w_off = lp->lsn.offset;
/*
* It's possible that we didn't find a checkpoint because there wasn't
* one in the last log file. Start searching.
*/
while (!found_checkpoint && cnt > 1) {
dblp->c_lsn.file = --cnt;
dblp->c_lsn.offset = 0;
lsn = dblp->c_lsn;
/* Set the cursor. Shouldn't fail, leave error messages on. */
if ((ret = __log_get(dblp, &lsn, &dbt, DB_SET, 0)) != 0)
return (ret);
/*
* Read to the end of the file, saving checkpoints. Shouldn't
* fail, leave error messages on.
*/
while (__log_get(dblp, &lsn, &dbt, DB_NEXT, 0) == 0) {
if (dbt.size < sizeof(u_int32_t))
continue;
memcpy(&chk, dbt.data, sizeof(u_int32_t));
if (chk == DB_txn_ckp) {
lp->c_lsn = lsn;
found_checkpoint = 1;
}
}
}
/* If we never find a checkpoint, that's okay, just 0 it out. */
if (!found_checkpoint) {
lp->c_lsn.file = 1;
lp->c_lsn.offset = 0;
}
__db_err(dblp->dbenv,
"Recovering the log: last valid LSN: file: %lu offset %lu",
(u_long)lp->lsn.file, (u_long)lp->lsn.offset);
/* Reset the cursor. */
ZERO_LSN(dblp->c_lsn);
return (0);
}
/*
* __log_find --
* Try to find a log file.
*
* PUBLIC: int __log_find __P((DB_LOG *, int *));
*/
int
__log_find(dblp, valp)
DB_LOG *dblp;
int *valp;
{
int cnt, fcnt, logval, ret;
const char *dir;
char **names, *p, *q;
/* Find the directory name. */
if ((ret = __log_name(dblp, 1, &p)) != 0)
return (ret);
if ((q = __db_rpath(p)) == NULL)
dir = PATH_DOT;
else {
*q = '\0';
dir = p;
}
/* Get the list of file names. */
ret = __db_dirlist(dir, &names, &fcnt);
FREES(p);
if (ret != 0) {
__db_err(dblp->dbenv, "%s: %s", dir, strerror(ret));
return (ret);
}
/*
* Search for a valid log file name, return a value of 0 on
* failure.
*/
*valp = 0;
for (cnt = fcnt, logval = 0; --cnt >= 0;)
if (strncmp(names[cnt], "log.", sizeof("log.") - 1) == 0) {
logval = atoi(names[cnt] + 4);
if (logval != 0 &&
__log_valid(dblp, dblp->lp, logval) == 0) {
*valp = logval;
break;
}
}
/* Discard the list. */
__db_dirfree(names, fcnt);
return (ret);
}
/*
* log_valid --
* Validate a log file.
*
* PUBLIC: int __log_valid __P((DB_LOG *, LOG *, int));
*/
int
__log_valid(dblp, lp, cnt)
DB_LOG *dblp;
LOG *lp;
int cnt;
{
LOGP persist;
ssize_t nw;
int fd, ret;
char *p;
if ((ret = __log_name(dblp, cnt, &p)) != 0)
return (ret);
fd = -1;
if ((ret = __db_open(p,
DB_RDONLY | DB_SEQUENTIAL,
DB_RDONLY | DB_SEQUENTIAL, 0, &fd)) != 0 ||
(ret = __db_seek(fd, 0, 0, sizeof(HDR), SEEK_SET)) != 0 ||
(ret = __db_read(fd, &persist, sizeof(LOGP), &nw)) != 0 ||
nw != sizeof(LOGP)) {
if (ret == 0)
ret = EIO;
if (fd != -1) {
(void)__db_close(fd);
__db_err(dblp->dbenv,
"Ignoring log file: %s: %s", p, strerror(ret));
}
goto err;
}
(void)__db_close(fd);
if (persist.magic != DB_LOGMAGIC) {
__db_err(dblp->dbenv,
"Ignoring log file: %s: magic number %lx, not %lx",
p, (u_long)persist.magic, (u_long)DB_LOGMAGIC);
ret = EINVAL;
goto err;
}
if (persist.version < DB_LOGOLDVER || persist.version > DB_LOGVERSION) {
__db_err(dblp->dbenv,
"Ignoring log file: %s: unsupported log version %lu",
p, (u_long)persist.version);
ret = EINVAL;
goto err;
}
if (lp != NULL) {
lp->persist.lg_max = persist.lg_max;
lp->persist.mode = persist.mode;
}
ret = 0;
err: FREES(p);
return (ret);
}
/*
* log_close --
* Close a log.
*/
int
log_close(dblp)
DB_LOG *dblp;
{
int ret, t_ret;
ret = 0;
/* Discard the per-thread pointer. */
if (dblp->mutexp != NULL) {
LOCK_LOGREGION(dblp);
__db_shalloc_free(dblp->addr, dblp->mutexp);
UNLOCK_LOGREGION(dblp);
}
/* Close the region. */
if ((t_ret =
__db_rclose(dblp->dbenv, dblp->fd, dblp->maddr)) != 0 && ret == 0)
ret = t_ret;
/* Close open files, release allocated memory. */
if (dblp->lfd != -1 && (t_ret = __db_close(dblp->lfd)) != 0 && ret == 0)
ret = t_ret;
if (dblp->c_dbt.data != NULL)
FREE(dblp->c_dbt.data, dblp->c_dbt.ulen);
if (dblp->c_fd != -1 &&
(t_ret = __db_close(dblp->c_fd)) != 0 && ret == 0)
ret = t_ret;
if (dblp->dbentry != NULL)
FREE(dblp->dbentry, (dblp->dbentry_cnt * sizeof(DB_ENTRY)));
if (dblp->dir != NULL)
FREES(dblp->dir);
/* Free the structure. */
FREE(dblp, sizeof(DB_LOG));
return (ret);
}
/*
* log_unlink --
* Exit a log.
*/
int
log_unlink(path, force, dbenv)
const char *path;
int force;
DB_ENV *dbenv;
{
return (__db_runlink(dbenv,
DB_APP_LOG, path, DB_DEFAULT_LOG_FILE, force));
}
/*
* log_stat --
* Return LOG statistics.
*/
int
log_stat(dblp, gspp, db_malloc)
DB_LOG *dblp;
DB_LOG_STAT **gspp;
void *(*db_malloc) __P((size_t));
{
LOG *lp;
*gspp = NULL;
lp = dblp->lp;
if ((*gspp = db_malloc == NULL ?
(DB_LOG_STAT *)__db_malloc(sizeof(**gspp)) :
(DB_LOG_STAT *)db_malloc(sizeof(**gspp))) == NULL)
return (ENOMEM);
/* Copy out the global statistics. */
LOCK_LOGREGION(dblp);
**gspp = lp->stat;
(*gspp)->st_magic = lp->persist.magic;
(*gspp)->st_version = lp->persist.version;
(*gspp)->st_mode = lp->persist.mode;
(*gspp)->st_lg_max = lp->persist.lg_max;
(*gspp)->st_region_nowait = lp->rlayout.lock.mutex_set_nowait;
(*gspp)->st_region_wait = lp->rlayout.lock.mutex_set_wait;
UNLOCK_LOGREGION(dblp);
return (0);
}