db_recover.c
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上传日期:2007-04-14
资源大小:10674k
文件大小:7k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1996, 1997, 1998, 1999, 2000
- * Sleepycat Software. All rights reserved.
- */
- #include "db_config.h"
- #ifndef lint
- static const char copyright[] =
- "Copyright (c) 1996-2000nSleepycat Software Inc. All rights reserved.n";
- static const char revid[] =
- "$Id: db_recover.c,v 11.17 2001/01/18 18:36:58 bostic Exp $";
- #endif
- #ifndef NO_SYSTEM_INCLUDES
- #include <sys/types.h>
- #if TIME_WITH_SYS_TIME
- #include <sys/time.h>
- #include <time.h>
- #else
- #if HAVE_SYS_TIME_H
- #include <sys/time.h>
- #else
- #include <time.h>
- #endif
- #endif
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #endif
- #include "db_int.h"
- #include "common_ext.h"
- #include "txn.h"
- int main __P((int, char *[]));
- void read_timestamp __P((char *, time_t *));
- void usage __P((void));
- void version_check __P((void));
- DB_ENV *dbenv;
- const char
- *progname = "db_recover"; /* Program name. */
- int
- main(argc, argv)
- int argc;
- char *argv[];
- {
- extern char *optarg;
- extern int optind;
- DB_TXNREGION *region;
- time_t now, timestamp;
- u_int32_t flags;
- int ch, exitval, fatal_recover, ret, verbose;
- char *home;
- version_check();
- home = NULL;
- timestamp = 0;
- exitval = fatal_recover = verbose = 0;
- while ((ch = getopt(argc, argv, "ch:t:Vv")) != EOF)
- switch (ch) {
- case 'c':
- fatal_recover = 1;
- break;
- case 'h':
- home = optarg;
- break;
- case 't':
- read_timestamp(optarg, ×tamp);
- break;
- case 'V':
- printf("%sn", db_version(NULL, NULL, NULL));
- exit(0);
- case 'v':
- verbose = 1;
- break;
- case '?':
- default:
- usage();
- }
- argc -= optind;
- argv += optind;
- if (argc != 0)
- usage();
- /* Handle possible interruptions. */
- __db_util_siginit();
- /*
- * Create an environment object and initialize it for error
- * reporting.
- */
- if ((ret = db_env_create(&dbenv, 0)) != 0) {
- fprintf(stderr,
- "%s: db_env_create: %sn", progname, db_strerror(ret));
- exit (1);
- }
- dbenv->set_errfile(dbenv, stderr);
- dbenv->set_errpfx(dbenv, progname);
- if (verbose) {
- (void)dbenv->set_verbose(dbenv, DB_VERB_RECOVERY, 1);
- (void)dbenv->set_verbose(dbenv, DB_VERB_CHKPOINT, 1);
- }
- if (timestamp &&
- (ret = dbenv->set_tx_timestamp(dbenv, ×tamp)) != 0) {
- dbenv->err(dbenv, ret, "DBENV->set_timestamp");
- goto shutdown;
- }
- /*
- * Initialize the environment -- we don't actually do anything
- * else, that all that's needed to run recovery.
- *
- * Note that we specify a private environment, as we're about to
- * create a region, and we don't want to to leave it around. If
- * we leave the region around, the application that should create
- * it will simply join it instead, and will then be running with
- * incorrectly sized (and probably terribly small) caches.
- */
- flags = 0;
- LF_SET(DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG |
- DB_INIT_MPOOL | DB_INIT_TXN | DB_PRIVATE | DB_USE_ENVIRON);
- LF_SET(fatal_recover ? DB_RECOVER_FATAL : DB_RECOVER);
- if ((ret = dbenv->open(dbenv, home, flags, 0)) != 0) {
- dbenv->err(dbenv, ret, "DBENV->open");
- goto shutdown;
- }
- if (verbose) {
- (void)time(&now);
- region = ((DB_TXNMGR *)dbenv->tx_handle)->reginfo.primary;
- dbenv->errx(dbenv, "Recovery complete at %.24s", ctime(&now));
- dbenv->errx(dbenv, "%s %lx %s [%lu][%lu]",
- "Maximum transaction id", (u_long)region->last_txnid,
- "Recovery checkpoint", (u_long)region->last_ckp.file,
- (u_long)region->last_ckp.offset);
- }
- if (0) {
- shutdown: exitval = 1;
- }
- /* Clean up the environment. */
- if ((ret = dbenv->close(dbenv, 0)) != 0) {
- exitval = 1;
- fprintf(stderr,
- "%s: dbenv->close: %sn", progname, db_strerror(ret));
- }
- /* Resend any caught signal. */
- __db_util_sigresend();
- return (exitval);
- }
- #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;
- /*
- * read_timestamp --
- * Convert a time argument to Epoch seconds.
- *
- * Copyright (c) 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- void
- read_timestamp(arg, timep)
- char *arg;
- time_t *timep;
- {
- struct tm *t;
- time_t now;
- int yearset;
- char *p;
- /* Start with the current time. */
- (void)time(&now);
- if ((t = localtime(&now)) == NULL) {
- fprintf(stderr,
- "%s: localtime: %sn", progname, strerror(errno));
- exit (1);
- }
- /* [[CC]YY]MMDDhhmm[.SS] */
- if ((p = strchr(arg, '.')) == NULL)
- t->tm_sec = 0; /* Seconds defaults to 0. */
- else {
- if (strlen(p + 1) != 2)
- goto terr;
- *p++ = ' ';
- t->tm_sec = ATOI2(p);
- }
- yearset = 0;
- switch(strlen(arg)) {
- case 12: /* CCYYMMDDhhmm */
- t->tm_year = ATOI2(arg);
- t->tm_year *= 100;
- yearset = 1;
- /* FALLTHOUGH */
- case 10: /* YYMMDDhhmm */
- if (yearset) {
- yearset = ATOI2(arg);
- t->tm_year += yearset;
- } else {
- yearset = ATOI2(arg);
- if (yearset < 69)
- t->tm_year = yearset + 2000;
- else
- t->tm_year = yearset + 1900;
- }
- t->tm_year -= 1900; /* Convert to UNIX time. */
- /* FALLTHROUGH */
- case 8: /* MMDDhhmm */
- t->tm_mon = ATOI2(arg);
- --t->tm_mon; /* Convert from 01-12 to 00-11 */
- t->tm_mday = ATOI2(arg);
- t->tm_hour = ATOI2(arg);
- t->tm_min = ATOI2(arg);
- break;
- default:
- goto terr;
- }
- t->tm_isdst = -1; /* Figure out DST. */
- *timep = mktime(t);
- if (*timep == -1) {
- terr: fprintf(stderr,
- "%s: out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]",
- progname);
- exit (1);
- }
- }
- void
- usage()
- {
- (void)fprintf(stderr,
- "usage: db_recover [-cVv] [-h home] [-t [[CC]YY]MMDDhhmm[.SS]]n");
- exit(1);
- }
- void
- version_check()
- {
- int v_major, v_minor, v_patch;
- /* Make sure we're loaded with the right version of the DB library. */
- (void)db_version(&v_major, &v_minor, &v_patch);
- if (v_major != DB_VERSION_MAJOR ||
- v_minor != DB_VERSION_MINOR || v_patch != DB_VERSION_PATCH) {
- fprintf(stderr,
- "%s: version %d.%d.%d doesn't match library version %d.%d.%dn",
- progname, DB_VERSION_MAJOR, DB_VERSION_MINOR,
- DB_VERSION_PATCH, v_major, v_minor, v_patch);
- exit (1);
- }
- }