ctdl3264: straightened out the compression stuff

[citadel.git] / citadel / utils / ctdl3264.c

// Attempt to convert your database from 32-bit to 64-bit.
// Don't run this.  It doesn't work and if you try to run it you will immediately die.
//
// Copyright (c) 2023 by Art Cancro citadel.org
//
// This program is open source software.  Use, duplication, or disclosure
// is subject to the terms of the GNU General Public License, version 3.

#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <stdio.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netdb.h>
#include <string.h>
#include <pwd.h>
#include <errno.h>
#include <stdarg.h>
#include <limits.h>
#include <libcitadel.h>
#include <zlib.h>
#include <db.h>
#include "../server/sysdep.h"
#include "../server/citadel_defs.h"
#include "../server/server.h"
#include "../server/citadel_dirs.h"
#include "ctdl3264_structs.h"

static DB_ENV *dbenv;           // The DB environment (global)

// Open the database environment
void open_dbenv(char *src_dir) {
        int ret;
        int i;
        u_int32_t flags = 0;
        int dbversion_major, dbversion_minor, dbversion_patch;

        printf( "db: open_dbenv() starting\n"
                "db:    Linked zlib: %s\n"
                "db: Compiled libdb: %s\n"
                "db:   Linked libdb: %s\n",
                zlibVersion(),
                DB_VERSION_STRING,
                db_version(&dbversion_major, &dbversion_minor, &dbversion_patch)
        );

        // Create synthetic integer version numbers and compare them.
        // Never allow citserver to run with a libdb older then the one with which it was compiled.
        int compiled_db_version = ( (DB_VERSION_MAJOR * 1000000) + (DB_VERSION_MINOR * 1000) + (DB_VERSION_PATCH) );
        int linked_db_version = ( (dbversion_major * 1000000) + (dbversion_minor * 1000) + (dbversion_patch) );
        if (compiled_db_version > linked_db_version) {
                printf( "db: ctdl3264 is running with a version of libdb older than the one with which it was compiled.\n"
                        "db: This is an invalid configuration.  ctdl3264 will now exit to prevent data loss.");
                exit(CTDLEXIT_DB);
        }

        printf("db: Setting up DB environment\n");
        ret = db_env_create(&dbenv, 0);
        if (ret) {
                printf("db: db_env_create: %s\n", db_strerror(ret));
                printf("db: exit code %d\n", ret);
                exit(CTDLEXIT_DB);
        }

        // We want to specify the shared memory buffer pool cachesize, but everything else is the default.
        ret = dbenv->set_cachesize(dbenv, 0, 64 * 1024, 0);
        if (ret) {
                printf("db: set_cachesize: %s\n", db_strerror(ret));
                dbenv->close(dbenv, 0);
                printf("db: exit code %d\n", ret);
                exit(CTDLEXIT_DB);
        }

        if ((ret = dbenv->set_lk_detect(dbenv, DB_LOCK_DEFAULT))) {
                printf("db: set_lk_detect: %s\n", db_strerror(ret));
                dbenv->close(dbenv, 0);
                printf("db: exit code %d\n", ret);
                exit(CTDLEXIT_DB);
        }

        flags = DB_CREATE | DB_INIT_MPOOL | DB_PRIVATE | DB_INIT_LOG;
        printf("db: dbenv open(dir=%s, flags=%d)\n", src_dir, flags);
        ret = dbenv->open(dbenv, src_dir, flags, 0);
        if (ret) {
                printf("db: dbenv->open: %s\n", db_strerror(ret));
                dbenv->close(dbenv, 0);
                printf("db: exit code %d\n", ret);
                exit(CTDLEXIT_DB);
        }
}


void close_dbenv(void) {
        printf("db: closing dbenv\n");
        int ret = dbenv->close(dbenv, 0);
        if (ret) {
                printf("db: DBENV->close: %s\n", db_strerror(ret));
        }
}


// placeholder convert function for the data types not yet implemented
void null_function(int which_cdb, DBT *in_key, DBT *in_data, DBT *out_key, DBT *out_data) {
}


// convert function for a message in msgmain
void convert_msgmain(int which_cdb, DBT *in_key, DBT *in_data, DBT *out_key, DBT *out_data) {
        int32_t in_msgnum;
        long out_msgnum;
        memcpy(&in_msgnum, in_key->data, sizeof(in_msgnum));
        out_msgnum = (long)in_msgnum;

        if (in_key->size != 4) {
                printf("\033[31m\033[1m *** SOURCE DATABASE IS NOT 32-BIT *** ABORTING *** \033[0m\n");
                abort();
        }

        // If the msgnum is negative, we are looking at METADATA
        if (in_msgnum < 0) {
                struct MetaData_32 *meta32 = (struct MetaData_32 *)in_data->data;

                printf("\033[32m\033[1mMetadata: msgnum=%d , refcount=%d , content_type=\"%s\" , rfc822len=%d\033[0m\n", meta32->meta_msgnum, meta32->meta_refcount, meta32->meta_content_type, meta32->meta_rfc822_length);

                out_key->size = sizeof(long);
                out_key->data = realloc(out_key->data, out_key->size);
                memcpy(out_key->data, &out_msgnum, sizeof(long));

                out_data->size = sizeof(struct MetaData);
                out_data->data = realloc(out_data->data, out_data->size);
                struct MetaData *meta64 = (struct MetaData *)out_data->data;
                memset(meta64, 0, sizeof(struct MetaData));
                meta64->meta_msgnum             = (long)        meta32->meta_msgnum;
                meta64->meta_refcount           = (int)         meta32->meta_refcount;
                strcpy(meta64->meta_content_type,               meta32->meta_content_type);
                meta64->meta_rfc822_length      = (long)        meta32->meta_rfc822_length;
        }

        // If the msgnum is positive, we are looking at a MESSAGE
        else if (in_msgnum > 0) {
                out_key->size = sizeof(long);
                out_key->data = realloc(out_key->data, out_key->size);
                memcpy(out_key->data, &out_msgnum, sizeof(long));

                // copy the message verbatim
                out_data->size = in_data->size;
                out_data->data = realloc(out_data->data, out_data->size);
                memcpy(out_data->data, in_data->data, out_data->size);
                printf("\033[32m\033[1mMessage: %ld\033[0m\n", out_msgnum);
        }

        // If the msgnum is 0 it's probably not a valid record.
        else {
                printf("msgmain: record 0 is impossible\n");
        }
}


// convert function for a user record
void convert_users(int which_cdb, DBT *in_key, DBT *in_data, DBT *out_key, DBT *out_data) {

        // The key is a string so we can just copy it over
        out_key->size = in_key->size;
        out_key->data = realloc(out_key->data, out_key->size);
        memcpy(out_key->data, in_key->data, in_key->size);

        struct ctdluser_32 *user32 = (struct ctdluser_32 *)in_data->data;

        out_data->size = sizeof(struct ctdluser);
        out_data->data = realloc(out_data->data, out_data->size);
        struct ctdluser *user64 = (struct ctdluser *)out_data->data;

        user64->version                 = (int)         user32->version;
        user64->uid                     = (uid_t)       user32->uid;
        strcpy(user64->password,                        user32->password);
        user64->flags                   = (unsigned)    user32->flags;
        user64->timescalled             = (long)        user32->timescalled;
        user64->posted                  = (long)        user32->posted;
        user64->axlevel                 = (cit_uint8_t) user32->axlevel;
        user64->usernum                 = (long)        user32->usernum;
        user64->lastcall                = (time_t)      user32->lastcall;
        user64->USuserpurge             = (int)         user32->USuserpurge;
        strcpy(user64->fullname,                        user32->fullname);
        user64->msgnum_bio              = (long)        user32->msgnum_bio;
        user64->msgnum_pic              = (long)        user32->msgnum_pic;
        strcpy(user64->emailaddrs,                      user32->emailaddrs);
        user64->msgnum_inboxrules       = (long)        user32->msgnum_inboxrules;
        user64->lastproc_inboxrules     = (long)        user32->lastproc_inboxrules;

        printf("\033[32m\033[1mUser: %s\033[0m\n", user64->fullname);
}


// convert function for a room record
void convert_rooms(int which_cdb, DBT *in_key, DBT *in_data, DBT *out_key, DBT *out_data) {

        // The key is a string so we can just copy it over
        out_key->size = in_key->size;
        out_key->data = realloc(out_key->data, out_key->size);
        memcpy(out_key->data, in_key->data, in_key->size);

        // data
        struct ctdlroom_32 *room32 = (struct ctdlroom_32 *)in_data->data;
        out_data->size = sizeof(struct ctdlroom);
        out_data->data = realloc(out_data->data, out_data->size);
        struct ctdlroom *room64 = (struct ctdlroom *)out_data->data;

        strcpy(room64->QRname,                          room32->QRname);
        strcpy(room64->QRpasswd,                        room32->QRpasswd);
        room64->QRroomaide              = (long)        room32->QRroomaide;
        room64->QRhighest               = (long)        room32->QRhighest;
        room64->QRgen                   = (time_t)      room32->QRgen;
        room64->QRflags                 = (unsigned)    room32->QRflags;
        strcpy(room64->QRdirname,                       room32->QRdirname);
        room64->msgnum_info             = (long)        room32->msgnum_info;
        room64->QRfloor                 = (char)        room32->QRfloor;
        room64->QRmtime                 = (time_t)      room32->QRmtime;
        room64->QRep.expire_mode        = (int)         room32->QRep.expire_mode;
        room64->QRep.expire_value       = (int)         room32->QRep.expire_value;
        room64->QRnumber                = (long)        room32->QRnumber;
        room64->QRorder                 = (char)        room32->QRorder;
        room64->QRflags2                = (unsigned)    room32->QRflags2;
        room64->QRdefaultview           = (int)         room32->QRdefaultview;
        room64->msgnum_pic              = (long)        room32->msgnum_pic;

        printf("\033[32m\033[1mRoom: %s\033[0m\n", room64->QRname);
}


// convert function for a floor record
void convert_floors(int which_cdb, DBT *in_key, DBT *in_data, DBT *out_key, DBT *out_data) {

        // the key is an "int", and "int" is 32-bits on both 32 and 64 bit platforms.
        out_key->size = in_key->size;
        out_key->data = realloc(out_key->data, out_key->size);
        memcpy(out_key->data, in_key->data, in_key->size);

        // data
        struct floor_32 *floor32 = (struct floor_32 *)in_data->data;
        out_data->size = sizeof(struct floor);
        out_data->data = realloc(out_data->data, out_data->size);
        struct floor *floor64 = (struct floor *)out_data->data;

        // these are probably bit-for-bit identical, actually ... but we do it the "right" way anyway
        floor64->f_flags                = (unsigned short)      floor32->f_flags;
        strcpy(floor64->f_name,                                 floor32->f_name);
        floor64->f_ref_count            = (int)                 floor32->f_ref_count;
        floor64->f_ep.expire_mode       = (int)                 floor32->f_ep.expire_mode;
        floor64->f_ep.expire_value      = (int)                 floor32->f_ep.expire_value;

        printf("\033[32m\033[1mFloor: %s\033[0m\n", floor64->f_name);
}


// convert function for a msglist
void convert_msglists(int which_cdb, DBT *in_key, DBT *in_data, DBT *out_key, DBT *out_data) {
        int i;

        // msglist records are indexed by a single "long" and contains an array of zero or more "long"s
        // and remember ... "long" is int32_t on the source system
        int32_t in_roomnum;
        long out_roomnum;
        memcpy(&in_roomnum, in_key->data, sizeof(in_roomnum));
        out_roomnum = (long) in_roomnum;

        if (in_key->size != 4) {
                printf("\033[31m\033[1m *** SOURCE DATABASE IS NOT 32-BIT *** ABORTING *** \033[0m\n");
                abort();
        }

        int num_msgs = in_data->size / sizeof(int32_t);
        printf("\033[32m\033[1mMsglist: for room %ld (%d messages)\033[0m\n", out_roomnum, num_msgs);

        // the key is a "long"
        out_key->size = sizeof(out_roomnum);
        out_key->data = realloc(out_key->data, out_key->size);
        memcpy(out_key->data, &out_roomnum, sizeof(out_roomnum));

        // the data is another array, but a wider type
        out_data->size = sizeof(long) * num_msgs;
        out_data->data = realloc(out_data->data, out_data->size);

        int32_t in_msg = 0;
        long out_msg = 0;
        for (i=0; i<num_msgs; ++i) {
                memcpy(&in_msg, (in_data->data + (i * sizeof(int32_t))), sizeof(int32_t));
                out_msg = (long) in_msg;
                memcpy((out_data->data + (i * sizeof(long))), &out_msg, sizeof(long));
                printf("#%ld\n", out_msg);
        }
}


// convert function for a visit record
void convert_visits(int which_cdb, DBT *in_key, DBT *in_data, DBT *out_key, DBT *out_data) {

        // data
        struct visit_32 *visit32 = (struct visit_32 *)in_data->data;
        out_data->size = sizeof(struct visit);
        out_data->data = realloc(out_data->data, out_data->size);
        struct visit *visit64 = (struct visit *)out_data->data;

        // convert the data (zero it out so it will compress well)
        memset(visit64, 0, sizeof(struct visit));
        visit64->v_roomnum              = (long)        visit32->v_roomnum;
        visit64->v_roomgen              = (long)        visit32->v_roomgen;
        visit64->v_usernum              = (long)        visit32->v_usernum;
        visit64->v_lastseen             = (long)        visit32->v_lastseen;
        visit64->v_flags                = (unsigned)    visit32->v_flags;
        strcpy(visit64->v_seen,                         visit32->v_seen);
        strcpy(visit64->v_answered,                     visit32->v_answered);
        visit64->v_view                 = (int)         visit32->v_view;

        printf("\033[32m\033[1mVisit: room %ld, gen %ld, user %ld\033[0m\n", visit64->v_roomnum, visit64->v_roomgen, visit64->v_usernum);

        // create the key (which is based on the data, so there is no need to convert the old key)
        out_key->size = sizeof(struct visit_index);
        out_key->data = realloc(out_key->data, out_key->size);
        struct visit_index *newvisitindex = (struct visit_index *) out_key->data;
        newvisitindex->iRoomID          =               visit64->v_roomnum;
        newvisitindex->iRoomGen         =               visit64->v_roomgen;
        newvisitindex->iUserID          =               visit64->v_usernum;
}


// convert function for a directory record
void convert_dir(int which_cdb, DBT *in_key, DBT *in_data, DBT *out_key, DBT *out_data) {

        // the key is a string
        out_key->size = in_key->size;
        out_key->data = realloc(out_key->data, out_key->size);
        memcpy(out_key->data, in_key->data, in_key->size);

        // the data is also a string
        out_data->size = in_data->size;
        out_data->data = realloc(out_data->data, out_data->size);
        memcpy(out_data->data, in_data->data, in_data->size);

        // please excuse my friend, he isn't null terminated
        printf("\033[32m\033[1mDirectory entry: %s -> %s\033[0m\n", (char *)out_key->data, (char *)out_data->data);
}


// convert function for a use table record
void convert_usetable(int which_cdb, DBT *in_key, DBT *in_data, DBT *out_key, DBT *out_data) {

        // the key is a string
        out_key->size = in_key->size;
        out_key->data = realloc(out_key->data, out_key->size);
        memcpy(out_key->data, in_key->data, in_key->size);

        // the data is a "struct UseTable"
        struct UseTable_32 *use32 = (struct UseTable_32 *)in_data->data;
        out_data->size = sizeof(struct UseTable);
        out_data->data = realloc(out_data->data, out_data->size);
        memset(out_data->data, 0, out_data->size);
        struct UseTable *use64 = (struct UseTable *)out_data->data;

        // convert the data
        strcpy(use64->ut_msgid,                         use32->ut_msgid);
        use64->ut_timestamp             = (time_t)      use32->ut_timestamp;
}


// convert function for large message texts
void convert_bigmsgs(int which_cdb, DBT *in_key, DBT *in_data, DBT *out_key, DBT *out_data) {

        // The key is a packed long
        int32_t in_msgnum;
        long out_msgnum;
        memcpy(&in_msgnum, in_key->data, sizeof(in_msgnum));
        out_msgnum = (long)in_msgnum;

        if (in_key->size != 4) {
                printf("\033[31m\033[1m *** SOURCE DATABASE IS NOT 32-BIT *** ABORTING *** \033[0m\n");
                abort();
        }

        // the data is binary-ish but has no packed integers
        out_data->size = in_data->size;
        out_data->data = realloc(out_data->data, out_data->size);
        memcpy(out_data->data, in_data->data, in_data->size);

        printf("\033[32m\033[1mBigmsg %ld , length %d\033[0m\n", out_msgnum, out_data->size);
}


void (*convert_functions[])(int which_cdb, DBT *in_key, DBT *in_data, DBT *out_key, DBT *out_data) = {
        convert_msgmain,        // CDB_MSGMAIN
        convert_users,          // CDB_USERS
        convert_rooms,          // CDB_ROOMS
        convert_floors,         // CDB_FLOORTAB
        convert_msglists,       // CDB_MSGLISTS
        convert_visits,         // CDB_VISIT
        convert_dir,            // CDB_DIRECTORY
        convert_usetable,       // CDB_USETABLE
        convert_bigmsgs,        // CDB_BIGMSGS
        null_function,          // CDB_FULLTEXT
        null_function,          // CDB_EUIDINDEX
        null_function,          // CDB_USERSBYNUMBER
        null_function,          // CDB_EXTAUTH
        null_function           // CDB_CONFIG
};


void convert_table(int which_cdb) {
        int ret;
        int compressed;
        char dbfilename[32];
        uLongf destLen = 0;

        printf("\033[32m\033[1mConverting table %d\033[0m\n", which_cdb);

        // shamelessly swiped from https://docs.oracle.com/database/bdb181/html/programmer_reference/am_cursor.html
        DB *dbp;
        DBC *dbcp;
        DBT in_key, in_data, out_key, out_data, uncomp_data, recomp_data;
        int num_rows = 0;

        // create a database handle
        ret = db_create(&dbp, dbenv, 0);
        if (ret) {
                printf("db: db_create: %s\n", db_strerror(ret));
                printf("db: exit code %d\n", ret);
                exit(CTDLEXIT_DB);
        }

        // open the file
        snprintf(dbfilename, sizeof dbfilename, "cdb.%02x", which_cdb);
        printf("\033[33m\033[1mdb: opening %s\033[0m\n", dbfilename);
        ret = dbp->open(dbp, NULL, dbfilename, NULL, DB_BTREE, 0, 0600);
        if (ret) {
                printf("db: db_open: %s\n", db_strerror(ret));
                printf("db: exit code %d\n", ret);
                exit(CTDLEXIT_DB);
        }

        // Acquire a cursor
        if ((ret = dbp->cursor(dbp, NULL, &dbcp, 0)) != 0) {
                printf("db: db_cursor: %s\n", db_strerror(ret));
                printf("db: exit code %d\n", ret);
                exit(CTDLEXIT_DB);
        }

        // Zero out these database keys
        memset(&in_key,         0, sizeof(DBT));        // input
        memset(&in_data,        0, sizeof(DBT));
        memset(&out_key,        0, sizeof(DBT));        // output
        memset(&out_data,       0, sizeof(DBT));
        memset(&uncomp_data,    0, sizeof(DBT));        // decompressed input (the key doesn't change)
        memset(&recomp_data,    0, sizeof(DBT));        // recompressed input (the key doesn't change)

        // Walk through the database, calling convert functions as we go and clearing buffers before each call.
        while (out_key.size = 0, out_data.size = 0, (ret = dbcp->get(dbcp, &in_key, &in_data, DB_NEXT)) == 0) {

                printf("DB: %02x ,  in_keylen: %-3d ,  in_datalen: %-10d , dataptr: %012lx\n", which_cdb, (int)in_key.size, (int)in_data.size, (long unsigned int)in_data.data);
                compressed = 0;

                // Do we need to decompress?
                static int32_t magic = COMPRESS_MAGIC;
                if ( (in_data.size >= sizeof(struct CtdlCompressHeader_32)) && (!memcmp(in_data.data, &magic, sizeof(magic))) ) {

                        // yes, we need to decompress
                        compressed = 1;
                        struct CtdlCompressHeader_32 comp32;
                        memcpy(&comp32, in_data.data, sizeof(struct CtdlCompressHeader_32));
                        uncomp_data.size = comp32.uncompressed_len;
                        uncomp_data.data = realloc(uncomp_data.data, uncomp_data.size);
                        destLen = (uLongf)comp32.uncompressed_len;

                        ret = uncompress((Bytef *)uncomp_data.data, (uLongf *)&destLen, (const Bytef *)in_data.data+sizeof(struct CtdlCompressHeader_32), (uLong)comp32.compressed_len);
                        if (ret != Z_OK) {
                                printf("db: uncompress() error %d\n", ret);
                                exit(CTDLEXIT_DB);
                        }
                        printf("\033[31m\033[1mDB: %02x ,  in_keylen: %-3d ,  in_datalen: %-10d , dataptr: %012lx (decompressed)\033[0m\n",
                                which_cdb, (int)in_key.size, comp32.uncompressed_len, (long unsigned int)uncomp_data.data);

                }

                // Call the convert function registered to this table
                convert_functions[which_cdb](which_cdb, &in_key, (compressed ? &uncomp_data : &in_data), &out_key, &out_data);

                // The logic here is that if the source data was compressed, we compress the output too
                if (compressed) {
                        printf("\033[31m\033[1mCOMPRESSING\033[0m\n");

                        struct CtdlCompressHeader zheader;
                        memset(&zheader, 0, sizeof(struct CtdlCompressHeader));
                        zheader.magic = COMPRESS_MAGIC;
                        zheader.uncompressed_len = out_data.size;
                        recomp_data.data = realloc(recomp_data.data, ((out_data.size * 101) / 100) + 100 + sizeof(struct CtdlCompressHeader));

                        if (compress2((Bytef *)(recomp_data.data + sizeof(struct CtdlCompressHeader)), &destLen, (Bytef *)out_data.data, (uLongf) out_data.size, 1) != Z_OK) {
                                printf("db: compress() error\n");
                                exit(CTDLEXIT_DB);
                        }
                        recomp_data.size = destLen;
                }

                // write the converted record to the new database
                if (out_key.size > 0) {



                        // NOTE TO SELF: if we compressed the output, write recomp_data instead of out_data

                        printf("DB: %02x , out_keylen: %-3d , out_datalen: %-10d , dataptr: %012lx\n", which_cdb, (int)out_key.size, (int)out_data.size, (long unsigned int)out_data.data);

                        // Knowing the total number of rows isn't critical to the program.  It's just for the user to know.
                        ++num_rows;
                }
        }

        if (ret != DB_NOTFOUND) {
                printf("db: db_get: %s\n", db_strerror(ret));
                printf("db: exit code %d\n", ret);
                exit(CTDLEXIT_DB);
        }

        printf("%d rows\n", num_rows);

        // free any leftover out_data pointers
        free(out_key.data);
        free(out_data.data);
        free(uncomp_data.data);
        free(recomp_data.data);

        // Flush the logs...
        //printf("\033[33m\033[1mdb: flushing the database logs\033[0m\n");
        //if ((ret = dbenv->log_flush(dbenv, NULL))) {
                //printf("db: log_flush: %s\n", db_strerror(ret));
        //}

        // ...and close the database (table)
        printf("\033[33m\033[1mdb: closing database %02x\033[0m\n", which_cdb);
        ret = dbp->close(dbp, 0);
        if (ret) {
                printf("db: db_close: %s\n", db_strerror(ret));
        }

}


int main(int argc, char **argv) {
        char *src_dir = NULL;
        int confirmed = 0;

        // Check to make sure we're running on the target 64-bit system
        if (sizeof(void *) != 8) {
                fprintf(stderr, "%s: this is a %ld-bit system.\n", argv[0], sizeof(void *)*8);
                fprintf(stderr, "%s: you must run this on a 64-bit system, onto which a 32-bit database has been copied.\n", argv[0]);
                exit(1);
        }

        // Parse command line
        int a;
        while ((a = getopt(argc, argv, "s:d:y")) != EOF) {
                switch (a) {
                case 's':
                        src_dir = optarg;
                        break;
                case 'y':
                        confirmed = 1;
                        break;
                default:
                        fprintf(stderr, "%s: usage: %s -s source_dir -d dest_dir\n", argv[0], argv[0]);
                        exit(2);
                }
        }

        // Warn the user
        printf("------------------------------------------------------------------------\n");
        printf("ctdl3264 converts a Citadel database written on a 32-bit system to one  \n");
        printf("that can be run on a 64-bit system.  It is intended to be run OFFLINE.  \n");
        printf("Neither the source nor the target data directories should be mounted by \n");
        printf("a running Citadel server.  We \033[1mguarantee\033[0m data corruption if you do not   \n");
        printf("observe this warning!  The source [-s] directory should contain a copy  \n");
        printf("of the database from your 32-bit system.  The destination [-d] directory\n");
        printf("should be empty and will receive your 64-bit database.                  \n");
        printf("------------------------------------------------------------------------\n");
        printf("     Source 32-bit directory: %s\n", src_dir);
        printf("Destination 64-bit directory: %s\n", "FIXME");
        printf("------------------------------------------------------------------------\n");

        if (confirmed == 1) {
                printf("You have specified the [-y] flag, so processing will continue.\n");
        }
        else {
                printf("Please read [ https://www.citadel.org/ctdl3264.html ] to learn how to proceed.\n");
                exit(0);
        }

        open_dbenv(src_dir);
        for (int i = 0; i < MAXCDB; ++i) {
                convert_table(i);
        }
        close_dbenv();

        exit(0);
}