db_recover.c

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1996-2005
 *      Sleepycat Software.  All rights reserved.
 *
 * $Id: db_recover.c,v 12.5 2005/06/16 20:21:29 bostic Exp $
 */

#include "db_config.h"

#ifndef lint
static const char copyright[] =
    "Copyright (c) 1996-2005\nSleepycat Software Inc.  All rights reserved.\n";
#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"

int db_recover_main __P((int, char *[]));
int db_recover_read_timestamp __P((char *, time_t *));
int db_recover_usage __P((void));
int db_recover_version_check __P((void));

const char *progname;

int
db_recover(args)
        char *args;
{
        int argc;
        char **argv;

        __db_util_arg("db_recover", args, &argc, &argv);
        return (db_recover_main(argc, argv) ? EXIT_FAILURE : EXIT_SUCCESS);
}

#include <stdio.h>
#define ERROR_RETURN    ERROR

int
db_recover_main(argc, argv)
        int argc;
        char *argv[];
{
        extern char *optarg;
        extern int optind, __db_getopt_reset;
        DB_ENV  *dbenv;
        time_t timestamp;
        u_int32_t flags;
        int ch, exitval, fatal_recover, ret, retain_env, verbose;
        char *home, *passwd;

        if ((progname = strrchr(argv[0], '/')) == NULL)
                progname = argv[0];
        else
                ++progname;

        if ((ret = db_recover_version_check()) != 0)
                return (ret);

        home = passwd = NULL;
        timestamp = 0;
        exitval = fatal_recover = retain_env = verbose = 0;
        __db_getopt_reset = 1;
        while ((ch = getopt(argc, argv, "ceh:P:t:Vv")) != EOF)
                switch (ch) {
                case 'c':
                        fatal_recover = 1;
                        break;
                case 'e':
                        retain_env = 1;
                        break;
                case 'h':
                        home = optarg;
                        break;
                case 'P':
                        passwd = strdup(optarg);
                        memset(optarg, 0, strlen(optarg));
                        if (passwd == NULL) {
                                fprintf(stderr, "%s: strdup: %s\n",
                                    progname, strerror(errno));
                                return (EXIT_FAILURE);
                        }
                        break;
                case 't':
                        if ((ret = db_recover_read_timestamp(optarg, &timestamp)) != 0)
                                return (ret);
                        break;
                case 'V':
                        printf("%s\n", db_version(NULL, NULL, NULL));
                        return (EXIT_SUCCESS);
                case 'v':
                        verbose = 1;
                        break;
                case '?':
                default:
                        return (db_recover_usage());
                }
        argc -= optind;
        argv += optind;

        if (argc != 0)
                return (db_recover_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: %s\n", progname, db_strerror(ret));
                return (EXIT_FAILURE);
        }
        dbenv->set_errfile(dbenv, stderr);
        dbenv->set_errpfx(dbenv, progname);
        if (verbose)
                (void)dbenv->set_verbose(dbenv, DB_VERB_RECOVERY, 1);
        if (timestamp &&
            (ret = dbenv->set_tx_timestamp(dbenv, &timestamp)) != 0) {
                dbenv->err(dbenv, ret, "DB_ENV->set_timestamp");
                goto shutdown;
        }

        if (passwd != NULL && (ret = dbenv->set_encrypt(dbenv,
            passwd, DB_ENCRYPT_AES)) != 0) {
                dbenv->err(dbenv, ret, "set_passwd");
                goto shutdown;
        }

        /*
         * Initialize the environment -- we don't actually do anything
         * else, that all that's needed to run recovery.
         *
         * Note that unless the caller specified the -e option, we use 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.  Applications that use -e should almost
         * certainly use DB_CONFIG files in the directory.
         */
        flags = 0;
        LF_SET(DB_CREATE | DB_INIT_LOG |
            DB_INIT_MPOOL | DB_INIT_TXN | DB_USE_ENVIRON);
        LF_SET(fatal_recover ? DB_RECOVER_FATAL : DB_RECOVER);
        LF_SET(retain_env ? DB_INIT_LOCK : DB_PRIVATE);
        if ((ret = dbenv->open(dbenv, home, flags, 0)) != 0) {
                dbenv->err(dbenv, ret, "DB_ENV->open");
                goto shutdown;
        }

        if (0) {
shutdown:       exitval = 1;
        }

        /* Clean up the environment. */
        if ((ret = dbenv->close(dbenv, 0)) != 0) {
                exitval = 1;
                fprintf(stderr,
                    "%s: dbenv->close: %s\n", progname, db_strerror(ret));
        }
        if (passwd != NULL)
                free(passwd);

        /* Resend any caught signal. */
        __db_util_sigresend();

        return (exitval == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
}

#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.
 */
int
db_recover_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: %s\n", progname, strerror(errno));
                return (EXIT_FAILURE);
        }
                                        /* [[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++ = '\0';
                t->tm_sec = ATOI2(p);
        }

        yearset = 0;
        switch (strlen(arg)) {
        case 12:                        /* CCYYMMDDhhmm */
                t->tm_year = ATOI2(arg);
                t->tm_year *= 100;
                yearset = 1;
                /* FALLTHROUGH */
        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);
                return (EXIT_FAILURE);
        }
        return (0);
}

int
db_recover_usage()
{
        (void)fprintf(stderr, "usage: %s %s\n", progname,
            "[-ceVv] [-h home] [-P password] [-t [[CC]YY]MMDDhhmm[.SS]]");
        return (EXIT_FAILURE);
}

int
db_recover_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) {
                fprintf(stderr,
        "%s: version %d.%d doesn't match library version %d.%d\n",
                    progname, DB_VERSION_MAJOR, DB_VERSION_MINOR,
                    v_major, v_minor);
                return (EXIT_FAILURE);
        }
        return (0);
}

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