rpmdb/db3.c

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/*@-type@*/ /* FIX: annotate db3 methods */
/*@unchecked@*/
static int _debug = 1;  /* XXX if < 0 debugging, > 0 unusual error returns */

#include "system.h"

#if defined(HAVE_FTOK) && defined(HAVE_SYS_IPC_H)
#include <sys/ipc.h>
#endif

#include <rpmlib.h>
#include <rpmmacro.h>
#include <rpmurl.h>     /* XXX urlPath proto */

#include <rpmdb.h>

#include "debug.h"

#if !defined(DB_CLIENT) /* XXX db-4.2.42 retrofit */
#define DB_CLIENT       DB_RPCCLIENT
#endif

/*@access rpmdb @*/
/*@access dbiIndex @*/
/*@access dbiIndexSet @*/

/*@-fielduse@*/
struct dbiHStats_s {
    unsigned int hash_magic;    
    unsigned int hash_version;  
    unsigned int hash_nkeys;    
    unsigned int hash_ndata;    
    unsigned int hash_pagesize; 
    unsigned int hash_nelem;    
    unsigned int hash_ffactor;  
    unsigned int hash_buckets;  
    unsigned int hash_free;     
    unsigned int hash_bfree;    
    unsigned int hash_bigpages; 
    unsigned int hash_big_bfree;
    unsigned int hash_overflows;
    unsigned int hash_ovfl_free;
    unsigned int hash_dup;      
    unsigned int hash_dup_free; 
};

struct dbiBStats_s {
    unsigned int bt_magic;      
    unsigned int bt_version;    
    unsigned int bt_nkeys;      
    unsigned int bt_ndata;      
    unsigned int bt_pagesize;   
    unsigned int bt_minkey;     
    unsigned int bt_re_len;     
    unsigned int bt_re_pad;     
    unsigned int bt_levels;     
    unsigned int bt_int_pg;     
    unsigned int bt_leaf_pg;    
    unsigned int bt_dup_pg;     
    unsigned int bt_over_pg;    
    unsigned int bt_free;       
    unsigned int bt_int_pgfree; 
    unsigned int bt_leaf_pgfree;
    unsigned int bt_dup_pgfree; 
    unsigned int bt_over_pgfree;
};
/*@=fielduse@*/

#ifdef  NOTNOW
static const char * bfstring(unsigned int x, const char * xbf)
{
    const char * s = xbf;
    static char digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
    static char buf[256];
    char * t, * te;
    unsigned radix;
    unsigned c, i, k;

    radix = (s != NULL ? *s++ : 16);

    if (radix <= 1 || radix >= 32)
        radix = 16;

    t = buf;
    switch (radix) {
    case 8:     *t++ = '0';     break;
    case 16:    *t++ = '0';     *t++ = 'x';     break;
    }

    i = 0;
    k = x;
    do { i++; k /= radix; } while (k);

    te = t + i;

    k = x;
    do { --i; t[i] = digits[k % radix]; k /= radix; } while (k);

    t = te;
    i = '<';
    if (s != NULL)
    while ((c = *s++) != '\0') {
        if (c > ' ') continue;

        k = (1 << (c - 1));
        if (!(x & k)) continue;

        if (t == te) *t++ = '=';

        *t++ = i;
        i = ',';
        while (*s > ' ')
            *t++ = *s++;
    }
    if (t > te) *t++ = '>';
    *t = '\0';
    return buf;
}

static const char * dbtFlags =
        "\20\1APPMALLOC\2ISSET\3MALLOC\4PARTIAL\5REALLOC\6USERMEM\7DUPOK";

static const char * dbenvOpenFlags =
        "\20\1CREATE\2NO_EXCEPTIONS\3FORCE\4NOMMAP\5RDONLY\6RECOVER\7THREAD\10TXN_NOSYNC\11USE_ENVIRON\12USE_ENVIRON_ROOT\13CDB\14LOCK\15LOG\16MPOOL\17TXN\20JOINENV\21LOCKDOWN\22PRIVATE\23RECOVER_FATAL\24SYSTEM_MEM";

static const char * dbOpenFlags =
        "\20\1CREATE\2NO_EXCEPTIONS\3FORCE\4NOMMAP\5RDONLY\6RECOVER\7THREAD\10TXN_NOSYNC\11USE_ENVIRON\12USE_ENVIRON_ROOT\13EXCL\14FCNTL_LOCKING\15RDWRMASTER\16TRUNCATE\17EXTENT\20APPLY_LOGREG";

static const char * dbenvSetFlags =
        "\20\1CREATE\2NO_EXCEPTIONS\3FORCE\4NOMMAP\5RDONLY\6RECOVER\7THREAD\10TXN_NOSYNC\11USE_ENVIRON\12USE_ENVIRON_ROOT\13CDB_ALLDB\14NOLOCKING\15NOPANIC\16PANIC_ENV\17REGION_INIT\20YIELDCPU";

static const char * dbSetFlags =
        "\20\1DUP\2DUPSORT\3RECNUM\4RENUMBER\5REVSPLITOFF\6SNAPSHOT";

static const char * dbiModeFlags =
        "\20\1WRONLY\2RDWR\7CREAT\10EXCL\11NOCTTY\12TRUNC\13APPEND\14NONBLOCK\15SYNC\16ASYNC\17DIRECT\20LARGEFILE\21DIRECTORY\22NOFOLLOW";
#endif  /* NOTNOW */


/*@-globuse -mustmod @*/        /* FIX: rpmError not annotated yet. */
static int cvtdberr(dbiIndex dbi, const char * msg, int error, int printit)
        /*@globals fileSystem @*/
        /*@modifies fileSystem @*/
{
    int rc = error;

    if (printit && rc) {
        /*@-moduncon@*/ /* FIX: annotate db3 methods */
        if (msg)
            rpmError(RPMERR_DBERR, _("db%d error(%d) from %s: %s\n"),
                dbi->dbi_api, rc, msg, db_strerror(error));
        else
            rpmError(RPMERR_DBERR, _("db%d error(%d): %s\n"),
                dbi->dbi_api, rc, db_strerror(error));
        /*@=moduncon@*/
    }

    return rc;
}
/*@=globuse =mustmod @*/

static int db_fini(dbiIndex dbi, const char * dbhome,
                /*@null@*/ const char * dbfile,
                /*@unused@*/ /*@null@*/ const char * dbsubfile)
        /*@globals fileSystem @*/
        /*@modifies fileSystem @*/
{
    rpmdb rpmdb = dbi->dbi_rpmdb;
    DB_ENV * dbenv = rpmdb->db_dbenv;
    int rc;

    if (dbenv == NULL)
        return 0;

    rc = dbenv->close(dbenv, 0);
    rc = cvtdberr(dbi, "dbenv->close", rc, _debug);

    if (dbfile)
        rpmMessage(RPMMESS_DEBUG, _("closed   db environment %s/%s\n"),
                        dbhome, dbfile);

    if (rpmdb->db_remove_env) {
        int xx;

        /*@-moduncon@*/ /* FIX: annotate db3 methods */
        xx = db_env_create(&dbenv, 0);
        /*@=moduncon@*/
        xx = cvtdberr(dbi, "db_env_create", xx, _debug);
#if (DB_VERSION_MAJOR == 3 && DB_VERSION_MINOR != 0) || (DB_VERSION_MAJOR == 4)
        xx = dbenv->remove(dbenv, dbhome, 0);
#else
        xx = dbenv->remove(dbenv, dbhome, NULL, 0);
#endif
        xx = cvtdberr(dbi, "dbenv->remove", xx, _debug);

        if (dbfile)
            rpmMessage(RPMMESS_DEBUG, _("removed  db environment %s/%s\n"),
                        dbhome, dbfile);

    }
    return rc;
}

static int db3_fsync_disable(/*@unused@*/ int fd)
        /*@*/
{
    return 0;
}

#if 0
#if HAVE_LIBPTHREAD
#if HAVE_PTHREAD_H
#include <pthread.h>
#endif

static int db3_pthread_nptl(void)
        /*@*/
{
    pthread_mutex_t mutex;
    pthread_mutexattr_t mutexattr, *mutexattrp = NULL;
    pthread_cond_t cond;
    pthread_condattr_t condattr, *condattrp = NULL;
    int ret = 0;

    ret = pthread_mutexattr_init(&mutexattr);
    if (ret == 0) {
        ret = pthread_mutexattr_setpshared(&mutexattr, PTHREAD_PROCESS_SHARED);
        mutexattrp = &mutexattr;
    }

    if (ret == 0)
        ret = pthread_mutex_init(&mutex, mutexattrp);
    if (mutexattrp != NULL)
        pthread_mutexattr_destroy(mutexattrp);
    if (ret)
        return ret;
    (void) pthread_mutex_destroy(&mutex);

    ret = pthread_condattr_init(&condattr);
    if (ret == 0) {
        ret = pthread_condattr_setpshared(&condattr, PTHREAD_PROCESS_SHARED);
        condattrp = &condattr;
    }

    if (ret == 0)
        ret = pthread_cond_init(&cond, condattrp);

    if (condattrp != NULL)
        (void)pthread_condattr_destroy(condattrp);
    if (ret == 0)
        (void) pthread_cond_destroy(&cond);
    return ret;
}
#endif
#endif

/*@-moduncon@*/ /* FIX: annotate db3 methods */
static int db_init(dbiIndex dbi, const char * dbhome,
                /*@null@*/ const char * dbfile,
                /*@unused@*/ /*@null@*/ const char * dbsubfile,
                /*@out@*/ DB_ENV ** dbenvp)
        /*@globals rpmGlobalMacroContext, h_errno,
                fileSystem @*/
        /*@modifies dbi, *dbenvp, fileSystem @*/
{
    rpmdb rpmdb = dbi->dbi_rpmdb;
    DB_ENV *dbenv = NULL;
    int eflags;
    int rc;

    if (dbenvp == NULL)
        return 1;

    /* XXX HACK */
    /*@-assignexpose@*/
    if (rpmdb->db_errfile == NULL)
        rpmdb->db_errfile = stderr;
    /*@=assignexpose@*/

    eflags = (dbi->dbi_oeflags | dbi->dbi_eflags);
    if (eflags & DB_JOINENV) eflags &= DB_JOINENV;

    if (dbfile)
        rpmMessage(RPMMESS_DEBUG, _("opening  db environment %s/%s %s\n"),
                dbhome, dbfile, prDbiOpenFlags(eflags, 1));

    /* XXX Can't do RPC w/o host. */
    if (dbi->dbi_host == NULL)
        dbi->dbi_ecflags &= ~DB_CLIENT;

    /* XXX Set a default shm_key. */
    if ((dbi->dbi_eflags & DB_SYSTEM_MEM) && dbi->dbi_shmkey == 0) {
#if defined(HAVE_FTOK)
        dbi->dbi_shmkey = ftok(dbhome, 0);
#else
        dbi->dbi_shmkey = 0x44631380;
#endif
    }

    rc = db_env_create(&dbenv, dbi->dbi_ecflags);
    rc = cvtdberr(dbi, "db_env_create", rc, _debug);
    if (dbenv == NULL || rc)
        goto errxit;

  { int xx;
    /*@-noeffectuncon@*/ /* FIX: annotate db3 methods */

 /* 4.1: dbenv->set_app_dispatch(???) */
 /* 4.1: dbenv->set_alloc(???) */
 /* 4.1: dbenv->set_data_dir(???) */
 /* 4.1: dbenv->set_encrypt(???) */

    dbenv->set_errcall(dbenv, rpmdb->db_errcall);
    dbenv->set_errfile(dbenv, rpmdb->db_errfile);
    dbenv->set_errpfx(dbenv, rpmdb->db_errpfx);
    /*@=noeffectuncon@*/

 /* 4.1: dbenv->set_feedback(???) */
 /* 4.1: dbenv->set_flags(???) */

 /* dbenv->set_paniccall(???) */

    if ((dbi->dbi_ecflags & DB_CLIENT) && dbi->dbi_host) {
        const char * home;
        int retry = 0;

        if ((home = strrchr(dbhome, '/')) != NULL)
            dbhome = ++home;

        while (retry++ < 5) {
/* XXX 3.3.4 change. */
#if (DB_VERSION_MAJOR == 3 && DB_VERSION_MINOR == 3) || (DB_VERSION_MAJOR == 4)
            xx = dbenv->set_rpc_server(dbenv, NULL, dbi->dbi_host,
                dbi->dbi_cl_timeout, dbi->dbi_sv_timeout, 0);
            xx = cvtdberr(dbi, "dbenv->set_server", xx, _debug);
#else
            xx = dbenv->set_server(dbenv, dbi->dbi_host,
                dbi->dbi_cl_timeout, dbi->dbi_sv_timeout, 0);
            xx = cvtdberr(dbi, "dbenv->set_server", xx, _debug);
#endif
            if (!xx)
                break;
            (void) sleep(15);
        }
    } else {
#if !(DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 3)
        xx = dbenv->set_verbose(dbenv, DB_VERB_CHKPOINT,
                (dbi->dbi_verbose & DB_VERB_CHKPOINT));
#endif
        xx = dbenv->set_verbose(dbenv, DB_VERB_DEADLOCK,
                (dbi->dbi_verbose & DB_VERB_DEADLOCK));
        xx = dbenv->set_verbose(dbenv, DB_VERB_RECOVERY,
                (dbi->dbi_verbose & DB_VERB_RECOVERY));
        xx = dbenv->set_verbose(dbenv, DB_VERB_WAITSFOR,
                (dbi->dbi_verbose & DB_VERB_WAITSFOR));

        if (dbi->dbi_mmapsize) {
            xx = dbenv->set_mp_mmapsize(dbenv, dbi->dbi_mmapsize);
            xx = cvtdberr(dbi, "dbenv->set_mp_mmapsize", xx, _debug);
        }
        if (dbi->dbi_tmpdir) {
            const char * root;
            const char * tmpdir;

            root = (dbi->dbi_root ? dbi->dbi_root : rpmdb->db_root);
/*@-boundsread@*/
            if ((root[0] == '/' && root[1] == '\0') || rpmdb->db_chrootDone)
                root = NULL;
/*@=boundsread@*/
/*@-mods@*/
            tmpdir = rpmGenPath(root, dbi->dbi_tmpdir, NULL);
/*@=mods@*/
            xx = dbenv->set_tmp_dir(dbenv, tmpdir);
            xx = cvtdberr(dbi, "dbenv->set_tmp_dir", xx, _debug);
            tmpdir = _free(tmpdir);
        }
    }

 /* dbenv->set_lk_conflicts(???) */
 /* dbenv->set_lk_detect(???) */
 /* 4.1: dbenv->set_lk_max_lockers(???) */
 /* 4.1: dbenv->set_lk_max_locks(???) */
 /* 4.1: dbenv->set_lk_max_objects(???) */

 /* 4.1: dbenv->set_lg_bsize(???) */
 /* 4.1: dbenv->set_lg_dir(???) */
 /* 4.1: dbenv->set_lg_max(???) */
 /* 4.1: dbenv->set_lg_regionmax(???) */

    if (dbi->dbi_cachesize) {
        xx = dbenv->set_cachesize(dbenv, 0, dbi->dbi_cachesize, 0);
        xx = cvtdberr(dbi, "dbenv->set_cachesize", xx, _debug);
    }

 /* 4.1 dbenv->set_timeout(???) */
 /* dbenv->set_tx_max(???) */
 /* 4.1: dbenv->set_tx_timestamp(???) */
 /* dbenv->set_tx_recover(???) */

 /* dbenv->set_rep_transport(???) */
 /* dbenv->set_rep_limit(???) */

    if (dbi->dbi_no_fsync) {
#if (DB_VERSION_MAJOR == 3 && DB_VERSION_MINOR != 0) || (DB_VERSION_MAJOR == 4)
        xx = db_env_set_func_fsync(db3_fsync_disable);
#else
        xx = dbenv->set_func_fsync(dbenv, db3_fsync_disable);
#endif
        xx = cvtdberr(dbi, "db_env_set_func_fsync", xx, _debug);
    }

    if (dbi->dbi_shmkey) {
        xx = dbenv->set_shm_key(dbenv, dbi->dbi_shmkey);
        xx = cvtdberr(dbi, "dbenv->set_shm_key", xx, _debug);
    }
  }

#if (DB_VERSION_MAJOR == 3 && DB_VERSION_MINOR != 0) || (DB_VERSION_MAJOR == 4)
    rc = (dbenv->open)(dbenv, dbhome, eflags, dbi->dbi_perms);
#else
    rc = (dbenv->open)(dbenv, dbhome, NULL, eflags, dbi->dbi_perms);
#endif
    rc = cvtdberr(dbi, "dbenv->open", rc, _debug);
    if (rc)
        goto errxit;

/*@-boundswrite@*/
    *dbenvp = dbenv;
/*@=boundswrite@*/

    return 0;

errxit:
    if (dbenv) {
        int xx;
        xx = dbenv->close(dbenv, 0);
        xx = cvtdberr(dbi, "dbenv->close", xx, _debug);
    }
    return rc;
}
/*@=moduncon@*/

static int db3sync(dbiIndex dbi, unsigned int flags)
        /*@globals fileSystem @*/
        /*@modifies fileSystem @*/
{
    DB * db = dbi->dbi_db;
    int rc = 0;
    int _printit;

    if (db != NULL)
        rc = db->sync(db, flags);
    /* XXX DB_INCOMPLETE is returned occaisionally with multiple access. */
#if (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
    _printit = _debug;
#else
    _printit = (rc == DB_INCOMPLETE ? 0 : _debug);
#endif
    rc = cvtdberr(dbi, "db->sync", rc, _printit);
    return rc;
}

static int db3cdup(dbiIndex dbi, DBC * dbcursor, DBC ** dbcp,
                unsigned int flags)
        /*@globals fileSystem @*/
        /*@modifies *dbcp, fileSystem @*/
{
    int rc;

/*@-boundswrite@*/
    if (dbcp) *dbcp = NULL;
/*@=boundswrite@*/
    rc = dbcursor->c_dup(dbcursor, dbcp, flags);
    rc = cvtdberr(dbi, "dbcursor->c_dup", rc, _debug);
    /*@-nullstate @*/ /* FIX: *dbcp can be NULL */
    return rc;
    /*@=nullstate @*/
}

/*@-mustmod@*/
static int db3cclose(dbiIndex dbi, /*@only@*/ /*@null@*/ DBC * dbcursor,
                /*@unused@*/ unsigned int flags)
        /*@globals fileSystem @*/
        /*@modifies dbi, fileSystem @*/
{
    int rc = -2;

    /* XXX db3copen error pathways come through here. */
    if (dbcursor != NULL) {
        rc = dbcursor->c_close(dbcursor);
        rc = cvtdberr(dbi, "dbcursor->c_close", rc, _debug);
    }
    return rc;
}
/*@=mustmod@*/

static int db3copen(dbiIndex dbi, DB_TXN * txnid,
                /*@null@*/ /*@out@*/ DBC ** dbcp, unsigned int dbiflags)
        /*@globals fileSystem @*/
        /*@modifies dbi, *dbcp, fileSystem @*/
{
    DB * db = dbi->dbi_db;
    DBC * dbcursor = NULL;
    int flags;
    int rc;

   /* XXX DB_WRITECURSOR cannot be used with sunrpc dbenv. */
    assert(db != NULL);
    if ((dbiflags & DB_WRITECURSOR) &&
        (dbi->dbi_eflags & DB_INIT_CDB) && !(dbi->dbi_oflags & DB_RDONLY))
    {
        flags = DB_WRITECURSOR;
    } else
        flags = 0;

    rc = db->cursor(db, txnid, &dbcursor, flags);
    rc = cvtdberr(dbi, "db->cursor", rc, _debug);

    if (dbcp)
        /*@-boundswrite -onlytrans@*/ *dbcp = dbcursor; /*@=boundswrite =onlytrans@*/
    else
        (void) db3cclose(dbi, dbcursor, 0);

    return rc;
}

static int db3cput(dbiIndex dbi, DBC * dbcursor, DBT * key, DBT * data,
                /*@unused@*/ unsigned int flags)
        /*@globals fileSystem @*/
        /*@modifies fileSystem @*/
{
    DB * db = dbi->dbi_db;
    int rc;

    assert(db != NULL);
    if (dbcursor == NULL) {
        rc = db->put(db, dbi->dbi_txnid, key, data, 0);
        rc = cvtdberr(dbi, "db->put", rc, _debug);
    } else {
        rc = dbcursor->c_put(dbcursor, key, data, DB_KEYLAST);
        rc = cvtdberr(dbi, "dbcursor->c_put", rc, _debug);
    }

    return rc;
}

/*@-mustmod@*/
static int db3cdel(dbiIndex dbi, DBC * dbcursor, DBT * key, DBT * data,
                unsigned int flags)
        /*@globals fileSystem @*/
        /*@modifies *dbcursor, fileSystem @*/
{
    DB * db = dbi->dbi_db;
    int rc;

    assert(db != NULL);
    if (dbcursor == NULL) {
        rc = db->del(db, dbi->dbi_txnid, key, flags);
        rc = cvtdberr(dbi, "db->del", rc, _debug);
    } else {
        int _printit;

        /* XXX TODO: insure that cursor is positioned with duplicates */
        rc = dbcursor->c_get(dbcursor, key, data, DB_SET);
        /* XXX DB_NOTFOUND can be returned */
        _printit = (rc == DB_NOTFOUND ? 0 : _debug);
        rc = cvtdberr(dbi, "dbcursor->c_get", rc, _printit);

        if (rc == 0) {
            rc = dbcursor->c_del(dbcursor, flags);
            rc = cvtdberr(dbi, "dbcursor->c_del", rc, _debug);
        }
    }

    return rc;
}
/*@=mustmod@*/

/*@-mustmod@*/
static int db3cget(dbiIndex dbi, DBC * dbcursor, DBT * key, DBT * data,
                unsigned int flags)
        /*@globals fileSystem @*/
        /*@modifies *dbcursor, *key, *data, fileSystem @*/
{
    DB * db = dbi->dbi_db;
    int _printit;
    int rc;

    assert(db != NULL);
    if (dbcursor == NULL) {
        /* XXX duplicates require cursors. */
        rc = db->get(db, dbi->dbi_txnid, key, data, 0);
        /* XXX DB_NOTFOUND can be returned */
        _printit = (rc == DB_NOTFOUND ? 0 : _debug);
        rc = cvtdberr(dbi, "db->get", rc, _printit);
    } else {
        /* XXX db3 does DB_FIRST on uninitialized cursor */
        rc = dbcursor->c_get(dbcursor, key, data, flags);
        /* XXX DB_NOTFOUND can be returned */
        _printit = (rc == DB_NOTFOUND ? 0 : _debug);
        rc = cvtdberr(dbi, "dbcursor->c_get", rc, _printit);
    }

    return rc;
}
/*@=mustmod@*/

/*@-mustmod@*/
static int db3cpget(dbiIndex dbi, DBC * dbcursor, DBT * key, DBT * pkey,
                DBT * data, unsigned int flags)
        /*@globals fileSystem @*/
        /*@modifies *dbcursor, *key, *data, fileSystem @*/
{
    DB * db = dbi->dbi_db;
    int _printit;
    int rc;

    assert(db != NULL);
    assert(dbcursor != NULL);

    /* XXX db3 does DB_FIRST on uninitialized cursor */
    rc = dbcursor->c_pget(dbcursor, key, pkey, data, flags);
    /* XXX DB_NOTFOUND can be returned */
    _printit = (rc == DB_NOTFOUND ? 0 : _debug);
    rc = cvtdberr(dbi, "dbcursor->c_pget", rc, _printit);

    return rc;
}
/*@=mustmod@*/

static int db3ccount(dbiIndex dbi, DBC * dbcursor,
                /*@null@*/ /*@out@*/ unsigned int * countp,
                /*@unused@*/ unsigned int flags)
        /*@globals fileSystem @*/
        /*@modifies *countp, fileSystem @*/
{
    db_recno_t count = 0;
    int rc = 0;

    flags = 0;
    rc = dbcursor->c_count(dbcursor, &count, flags);
    rc = cvtdberr(dbi, "dbcursor->c_count", rc, _debug);
    if (rc) return rc;
/*@-boundswrite@*/
    if (countp) *countp = count;
/*@=boundswrite@*/

    return rc;
}

static int db3byteswapped(dbiIndex dbi) /*@*/
{
    DB * db = dbi->dbi_db;
    int rc = 0;

    if (db != NULL) {
#if (DB_VERSION_MAJOR == 3 && DB_VERSION_MINOR == 3 && DB_VERSION_PATCH == 11) \
 || (DB_VERSION_MAJOR == 4)
        int isswapped = 0;
        rc = db->get_byteswapped(db, &isswapped);
        if (rc == 0)
            rc = isswapped;
#else
        rc = db->get_byteswapped(db);
#endif
    }

    return rc;
}

static int db3stat(dbiIndex dbi, unsigned int flags)
        /*@globals fileSystem @*/
        /*@modifies dbi, fileSystem @*/
{
    DB * db = dbi->dbi_db;
#if (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 3)
    DB_TXN * txnid = NULL;
#endif
    int rc = 0;

    assert(db != NULL);
#if defined(DB_FAST_STAT)
    if (flags)
        flags = DB_FAST_STAT;
    else
#endif
        flags = 0;
    dbi->dbi_stats = _free(dbi->dbi_stats);
/* XXX 3.3.4 change. */
#if (DB_VERSION_MAJOR == 3 && DB_VERSION_MINOR == 3) || (DB_VERSION_MAJOR == 4)
#if (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 3)
    rc = db->stat(db, txnid, &dbi->dbi_stats, flags);
#else
    rc = db->stat(db, &dbi->dbi_stats, flags);
#endif
#else
    rc = db->stat(db, &dbi->dbi_stats, NULL, flags);
#endif
    rc = cvtdberr(dbi, "db->stat", rc, _debug);
    return rc;
}

/*@-mustmod@*/
static int db3associate(dbiIndex dbi, dbiIndex dbisecondary,
                int (*callback)(DB *, const DBT *, const DBT *, DBT *),
                unsigned int flags)
        /*@globals fileSystem @*/
        /*@modifies dbi, fileSystem @*/
{
    DB * db = dbi->dbi_db;
    DB * secondary = dbisecondary->dbi_db;
    int rc;

/*@-moduncon@*/ /* FIX: annotate db3 methods */
#if (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
    DB_TXN * txnid = NULL;

assert(db != NULL);
    rc = db->associate(db, txnid, secondary, callback, flags);
#else
assert(db != NULL);
    rc = db->associate(db, secondary, callback, flags);
#endif
/*@=moduncon@*/
    rc = cvtdberr(dbi, "db->associate", rc, _debug);
    return rc;
}
/*@=mustmod@*/

/*@-mustmod@*/
static int db3join(dbiIndex dbi, DBC ** curslist, DBC ** dbcp,
                unsigned int flags)
        /*@globals fileSystem @*/
        /*@modifies dbi, fileSystem @*/
{
    DB * db = dbi->dbi_db;
    int rc;

assert(db != NULL);
/*@-moduncon@*/ /* FIX: annotate db3 methods */
    rc = db->join(db, curslist, dbcp, flags);
/*@=moduncon@*/
    rc = cvtdberr(dbi, "db->join", rc, _debug);
    return rc;
}
/*@=mustmod@*/

/*@-moduncon@*/ /* FIX: annotate db3 methods */
static int db3close(/*@only@*/ dbiIndex dbi, /*@unused@*/ unsigned int flags)
        /*@globals rpmGlobalMacroContext, h_errno,
                fileSystem @*/
        /*@modifies dbi, fileSystem @*/
{
    rpmdb rpmdb = dbi->dbi_rpmdb;
    const char * urlfn = NULL;
    const char * root;
    const char * home;
    const char * dbhome;
    const char * dbfile;
    const char * dbsubfile;
    DB * db = dbi->dbi_db;
    int _printit;
    int rc = 0, xx;

    flags = 0;  /* XXX unused */

    /*
     * Get the prefix/root component and directory path.
     */
    root = (dbi->dbi_root ? dbi->dbi_root : rpmdb->db_root);
/*@-boundsread@*/
    if ((root[0] == '/' && root[1] == '\0') || rpmdb->db_chrootDone)
        root = NULL;
/*@=boundsread@*/
    home = (dbi->dbi_home ? dbi->dbi_home : rpmdb->db_home);

    /*
     * Either the root or directory components may be a URL. Concatenate,
     * convert the URL to a path, and add the name of the file.
     */
    /*@-mods@*/
    urlfn = rpmGenPath(root, home, NULL);
    /*@=mods@*/
    (void) urlPath(urlfn, &dbhome);
    if (dbi->dbi_temporary) {
        dbfile = NULL;
        dbsubfile = NULL;
    } else {
#ifdef  HACK    /* XXX necessary to support dbsubfile */
        dbfile = (dbi->dbi_file ? dbi->dbi_file : db3basename);
        dbsubfile = (dbi->dbi_subfile ? dbi->dbi_subfile : tagName(dbi->dbi_rpmtag));
#else
        dbfile = (dbi->dbi_file ? dbi->dbi_file : tagName(dbi->dbi_rpmtag));
        dbsubfile = NULL;
#endif
    }

    if (db) {
        rc = db->close(db, 0);
        /* XXX ignore not found error messages. */
        _printit = (rc == ENOENT ? 0 : _debug);
        rc = cvtdberr(dbi, "db->close", rc, _printit);
        db = dbi->dbi_db = NULL;

        rpmMessage(RPMMESS_DEBUG, _("closed   db index       %s/%s\n"),
                dbhome, (dbfile ? dbfile : tagName(dbi->dbi_rpmtag)));

    }

    if (rpmdb->db_dbenv != NULL && dbi->dbi_use_dbenv) {
        if (rpmdb->db_opens == 1) {
            /*@-nullstate@*/
            xx = db_fini(dbi, (dbhome ? dbhome : ""), dbfile, dbsubfile);
            /*@=nullstate@*/
            rpmdb->db_dbenv = NULL;
        }
        rpmdb->db_opens--;
    }

    if (dbi->dbi_verify_on_close && !dbi->dbi_temporary) {
        DB_ENV * dbenv = NULL;

        /*@-moduncon@*/ /* FIX: annotate db3 methods */
        rc = db_env_create(&dbenv, 0);
        /*@=moduncon@*/
        rc = cvtdberr(dbi, "db_env_create", rc, _debug);
        if (rc || dbenv == NULL) goto exit;

        /*@-noeffectuncon@*/ /* FIX: annotate db3 methods */
        dbenv->set_errcall(dbenv, rpmdb->db_errcall);
        dbenv->set_errfile(dbenv, rpmdb->db_errfile);
        dbenv->set_errpfx(dbenv, rpmdb->db_errpfx);
 /*     dbenv->set_paniccall(???) */
        /*@=noeffectuncon@*/
#if !(DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 3)
        xx = dbenv->set_verbose(dbenv, DB_VERB_CHKPOINT,
                (dbi->dbi_verbose & DB_VERB_CHKPOINT));
#endif
        xx = dbenv->set_verbose(dbenv, DB_VERB_DEADLOCK,
                (dbi->dbi_verbose & DB_VERB_DEADLOCK));
        xx = dbenv->set_verbose(dbenv, DB_VERB_RECOVERY,
                (dbi->dbi_verbose & DB_VERB_RECOVERY));
        xx = dbenv->set_verbose(dbenv, DB_VERB_WAITSFOR,
                (dbi->dbi_verbose & DB_VERB_WAITSFOR));

        if (dbi->dbi_tmpdir) {
            /*@-mods@*/
            const char * tmpdir = rpmGenPath(root, dbi->dbi_tmpdir, NULL);
            /*@=mods@*/
            rc = dbenv->set_tmp_dir(dbenv, tmpdir);
            rc = cvtdberr(dbi, "dbenv->set_tmp_dir", rc, _debug);
            tmpdir = _free(tmpdir);
            if (rc) goto exit;
        }
            
        rc = (dbenv->open)(dbenv, dbhome,
            DB_CREATE | DB_INIT_MPOOL | DB_PRIVATE | DB_USE_ENVIRON, 0);
        rc = cvtdberr(dbi, "dbenv->open", rc, _debug);
        if (rc) goto exit;

        /*@-moduncon -nullstate@*/ /* FIX: annotate db3 methods */
        rc = db_create(&db, dbenv, 0);
        /*@=moduncon =nullstate@*/
        rc = cvtdberr(dbi, "db_create", rc, _debug);

        if (db != NULL) {
                /*@-mods@*/
                const char * dbf = rpmGetPath(dbhome, "/", dbfile, NULL);
                /*@=mods@*/

                rc = db->verify(db, dbf, NULL, NULL, flags);
                rc = cvtdberr(dbi, "db->verify", rc, _debug);

                rpmMessage(RPMMESS_DEBUG, _("verified db index       %s/%s\n"),
                        (dbhome ? dbhome : ""),
                        (dbfile ? dbfile : tagName(dbi->dbi_rpmtag)));

                /*
                 * The DB handle may not be accessed again after
                 * DB->verify is called, regardless of its return.
                 */
                db = NULL;
                dbf = _free(dbf);
        }
        xx = dbenv->close(dbenv, 0);
        xx = cvtdberr(dbi, "dbenv->close", xx, _debug);
        if (rc == 0 && xx) rc = xx;
    }

exit:
    dbi->dbi_db = NULL;

    urlfn = _free(urlfn);

    dbi = db3Free(dbi);

    return rc;
}
/*@=moduncon@*/

static int db3open(rpmdb rpmdb, rpmTag rpmtag, dbiIndex * dbip)
        /*@globals rpmGlobalMacroContext, h_errno,
                fileSystem, internalState @*/
        /*@modifies *dbip, fileSystem, internalState @*/
{
    /*@-nestedextern -shadow@*/
    extern struct _dbiVec db3vec;
    /*@=nestedextern =shadow@*/
    const char * urlfn = NULL;
    const char * root;
    const char * home;
    const char * dbhome;
    const char * dbfile;
    const char * dbsubfile;
    dbiIndex dbi = NULL;
    int rc = 0;
    int xx;

    DB * db = NULL;
    DB_ENV * dbenv = NULL;
#if (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
    DB_TXN * txnid = NULL;
#endif
    u_int32_t oflags;
    int _printit;

/*@-boundswrite@*/
    if (dbip)
        *dbip = NULL;
/*@=boundswrite@*/

    /*
     * Parse db configuration parameters.
     */
    /*@-mods@*/
    if ((dbi = db3New(rpmdb, rpmtag)) == NULL)
        /*@-nullstate@*/
        return 1;
        /*@=nullstate@*/
    /*@=mods@*/
    dbi->dbi_api = DB_VERSION_MAJOR;

    /*
     * Get the prefix/root component and directory path.
     */
    root = (dbi->dbi_root ? dbi->dbi_root : rpmdb->db_root);
/*@-boundsread@*/
    if ((root[0] == '/' && root[1] == '\0') || rpmdb->db_chrootDone)
        root = NULL;
/*@=boundsread@*/
    home = (dbi->dbi_home ? dbi->dbi_home : rpmdb->db_home);

    /*
     * Either the root or directory components may be a URL. Concatenate,
     * convert the URL to a path, and add the name of the file.
     */
    /*@-mods@*/
    urlfn = rpmGenPath(root, home, NULL);
    /*@=mods@*/
    (void) urlPath(urlfn, &dbhome);
    if (dbi->dbi_temporary) {
        dbfile = NULL;
        dbsubfile = NULL;
    } else {
#ifdef  HACK    /* XXX necessary to support dbsubfile */
        dbfile = (dbi->dbi_file ? dbi->dbi_file : db3basename);
        dbsubfile = (dbi->dbi_subfile ? dbi->dbi_subfile : tagName(dbi->dbi_rpmtag));
#else
        dbfile = (dbi->dbi_file ? dbi->dbi_file : tagName(dbi->dbi_rpmtag));
        dbsubfile = NULL;
#endif
    }

    oflags = (dbi->dbi_oeflags | dbi->dbi_oflags);
    oflags &= ~DB_TRUNCATE;     /* XXX this is dangerous */

#if 0   /* XXX rpmdb: illegal flag combination specified to DB->open */
    if ( dbi->dbi_mode & O_EXCL) oflags |= DB_EXCL;
#endif

    /*
     * Map open mode flags onto configured database/environment flags.
     */
    if (dbi->dbi_temporary) {
        oflags |= DB_CREATE;
        dbi->dbi_oeflags |= DB_CREATE;
        oflags &= ~DB_RDONLY;
        dbi->dbi_oflags &= ~DB_RDONLY;
    } else {
        if (!(dbi->dbi_mode & (O_RDWR|O_WRONLY))) oflags |= DB_RDONLY;
        if (dbi->dbi_mode & O_CREAT) {
            oflags |= DB_CREATE;
            dbi->dbi_oeflags |= DB_CREATE;
        }
#ifdef  DANGEROUS
        if ( dbi->dbi_mode & O_TRUNC) oflags |= DB_TRUNCATE;
#endif
    }

    /*
     * Create the /var/lib/rpm directory if it doesn't exist (root only).
     */
    (void) rpmioMkpath(dbhome, 0755, getuid(), getgid());

    /*
     * Avoid incompatible DB_CREATE/DB_RDONLY flags on DBENV->open.
     */
    if (dbi->dbi_use_dbenv) {

#if 0
#if HAVE_LIBPTHREAD
        if (rpmdb->db_dbenv == NULL) {
            /* Set DB_PRIVATE if posix mutexes are not shared. */
            xx = db3_pthread_nptl();
            if (xx) {
                dbi->dbi_eflags |= DB_PRIVATE;
                rpmMessage(RPMMESS_DEBUG, _("unshared posix mutexes found(%d), adding DB_PRIVATE, using fcntl lock\n"), xx);
            }
        }
#endif
#endif

        if (access(dbhome, W_OK) == -1) {

            /* dbhome is unwritable, don't attempt DB_CREATE on DB->open ... */
            oflags &= ~DB_CREATE;

            /* ... but DBENV->open might still need DB_CREATE ... */
            if (dbi->dbi_eflags & DB_PRIVATE) {
                dbi->dbi_eflags &= ~DB_JOINENV;
            } else {
                dbi->dbi_eflags |= DB_JOINENV;
                dbi->dbi_oeflags &= ~DB_CREATE;
                dbi->dbi_oeflags &= ~DB_THREAD;
                /* ... but, unless DB_PRIVATE is used, skip DBENV. */
                dbi->dbi_use_dbenv = 0;
            }

            /* ... DB_RDONLY maps dbhome perms across files ...  */
            if (dbi->dbi_temporary) {
                oflags |= DB_CREATE;
                dbi->dbi_oeflags |= DB_CREATE;
                oflags &= ~DB_RDONLY;
                dbi->dbi_oflags &= ~DB_RDONLY;
            } else {
                oflags |= DB_RDONLY;
                /* ... and DB_WRITECURSOR won't be needed ...  */
                dbi->dbi_oflags |= DB_RDONLY;
            }

        } else {        /* dbhome is writable, check for persistent dbenv. */
            /*@-mods@*/
            const char * dbf = rpmGetPath(dbhome, "/__db.001", NULL);
            /*@=mods@*/

            if (access(dbf, F_OK) == -1) {
                /* ... non-existent (or unwritable) DBENV, will create ... */
                dbi->dbi_oeflags |= DB_CREATE;
                dbi->dbi_eflags &= ~DB_JOINENV;
            } else {
                /* ... pre-existent (or bogus) DBENV, will join ... */
                if (dbi->dbi_eflags & DB_PRIVATE) {
                    dbi->dbi_eflags &= ~DB_JOINENV;
                } else {
                    dbi->dbi_eflags |= DB_JOINENV;
                    dbi->dbi_oeflags &= ~DB_CREATE;
                    dbi->dbi_oeflags &= ~DB_THREAD;
                }
            }
            dbf = _free(dbf);
        }
    }

    /*
     * Avoid incompatible DB_CREATE/DB_RDONLY flags on DB->open.
     */
    if ((oflags & DB_CREATE) && (oflags & DB_RDONLY)) {
        /* dbhome is writable, and DB->open flags may conflict. */
        const char * dbfn = (dbfile ? dbfile : tagName(dbi->dbi_rpmtag));
        /*@-mods@*/
        const char * dbf = rpmGetPath(dbhome, "/", dbfn, NULL);
        /*@=mods@*/

        if (access(dbf, F_OK) == -1) {
            /* File does not exist, DB->open might create ... */
            oflags &= ~DB_RDONLY;
        } else {
            /* File exists, DB->open need not create ... */
            oflags &= ~DB_CREATE;
        }

        /* Only writers need DB_WRITECURSOR ... */
        if (!(oflags & DB_RDONLY) && access(dbf, W_OK) == 0) {
            dbi->dbi_oflags &= ~DB_RDONLY;
        } else {
            dbi->dbi_oflags |= DB_RDONLY;
        }
        dbf = _free(dbf);
    }

    /*
     * Turn off verify-on-close if opening read-only.
     */
    if (oflags & DB_RDONLY)
        dbi->dbi_verify_on_close = 0;

    if (dbi->dbi_use_dbenv) {
        /*@-mods@*/
        if (rpmdb->db_dbenv == NULL) {
            rc = db_init(dbi, dbhome, dbfile, dbsubfile, &dbenv);
            if (rc == 0) {
                rpmdb->db_dbenv = dbenv;
                rpmdb->db_opens = 1;
            }
        } else {
            dbenv = rpmdb->db_dbenv;
            rpmdb->db_opens++;
        }
        /*@=mods@*/
    }

    rpmMessage(RPMMESS_DEBUG, _("opening  db index       %s/%s %s mode=0x%x\n"),
                dbhome, (dbfile ? dbfile : tagName(dbi->dbi_rpmtag)),
                prDbiOpenFlags(oflags, 0), dbi->dbi_mode);

    if (rc == 0) {
        static int _lockdbfd = 0;

        /*@-moduncon@*/ /* FIX: annotate db3 methods */
        rc = db_create(&db, dbenv, dbi->dbi_cflags);
        /*@=moduncon@*/
        rc = cvtdberr(dbi, "db_create", rc, _debug);
        if (rc == 0 && db != NULL) {

/* XXX 3.3.4 change. */
#if (DB_VERSION_MAJOR == 3 && DB_VERSION_MINOR == 3) || (DB_VERSION_MAJOR == 4)
            if (rc == 0 &&
                        rpmdb->db_malloc && rpmdb->db_realloc && rpmdb->db_free)
            {
                rc = db->set_alloc(db,
                        rpmdb->db_malloc, rpmdb->db_realloc, rpmdb->db_free);
                rc = cvtdberr(dbi, "db->set_alloc", rc, _debug);
            }
#else
            if (rc == 0 && rpmdb->db_malloc) {
                rc = db->set_malloc(db, rpmdb->db_malloc);
                rc = cvtdberr(dbi, "db->set_malloc", rc, _debug);
            }
#endif

/* 4.1: db->set_cache_priority(???) */
            if (rc == 0 && !dbi->dbi_use_dbenv && dbi->dbi_cachesize) {
                rc = db->set_cachesize(db, 0, dbi->dbi_cachesize, 0);
                rc = cvtdberr(dbi, "db->set_cachesize", rc, _debug);
            }
/* 4.1: db->set_encrypt(???) */
/* 4.1: db->set_errcall(dbenv, rpmdb->db_errcall); */
/* 4.1: db->set_errfile(dbenv, rpmdb->db_errfile); */
/* 4.1: db->set_errpfx(dbenv, rpmdb->db_errpfx); */
 /* 4.1: db->set_feedback(???) */

            if (rc == 0 && dbi->dbi_lorder) {
                rc = db->set_lorder(db, dbi->dbi_lorder);
                rc = cvtdberr(dbi, "db->set_lorder", rc, _debug);
            }
            if (rc == 0 && dbi->dbi_pagesize) {
                rc = db->set_pagesize(db, dbi->dbi_pagesize);
                rc = cvtdberr(dbi, "db->set_pagesize", rc, _debug);
            }
 /* 4.1: db->set_paniccall(???) */
            if (rc == 0 && oflags & DB_CREATE) {
                switch(dbi->dbi_type) {
                default:
                case DB_HASH:
                    if (dbi->dbi_h_ffactor) {
                        rc = db->set_h_ffactor(db, dbi->dbi_h_ffactor);
                        rc = cvtdberr(dbi, "db->set_h_ffactor", rc, _debug);
                        if (rc) break;
                    }
                    if (dbi->dbi_h_nelem) {
                        rc = db->set_h_nelem(db, dbi->dbi_h_nelem);
                        rc = cvtdberr(dbi, "db->set_h_nelem", rc, _debug);
                        if (rc) break;
                    }
                    if (dbi->dbi_h_flags) {
                        rc = db->set_flags(db, dbi->dbi_h_flags);
                        rc = cvtdberr(dbi, "db->set_h_flags", rc, _debug);
                        if (rc) break;
                    }
/* XXX db-3.2.9 has added a DB arg to the call. */
#if (DB_VERSION_MAJOR == 3 && DB_VERSION_MINOR > 2) || (DB_VERSION_MAJOR == 4)
                    if (dbi->dbi_h_hash_fcn) {
                        rc = db->set_h_hash(db, dbi->dbi_h_hash_fcn);
                        rc = cvtdberr(dbi, "db->set_h_hash", rc, _debug);
                        if (rc) break;
                    }
                    if (dbi->dbi_h_dup_compare_fcn) {
                        rc = db->set_dup_compare(db, dbi->dbi_h_dup_compare_fcn);
                        rc = cvtdberr(dbi, "db->set_dup_compare", rc, _debug);
                        if (rc) break;
                    }
#endif
                    break;
                case DB_BTREE:
/* 4.1: db->set_append_recno(???) */
                    if (dbi->dbi_bt_flags) {
                        rc = db->set_flags(db, dbi->dbi_bt_flags);
                        rc = cvtdberr(dbi, "db->set_bt_flags", rc, _debug);
                        if (rc) break;
                    }
                    if (dbi->dbi_bt_minkey) {
                        rc = db->set_bt_minkey(db, dbi->dbi_bt_minkey);
                        rc = cvtdberr(dbi, "db->set_bt_minkey", rc, _debug);
                        if (rc) break;
                    }
/* XXX db-3.2.9 has added a DB arg to the call. */
#if (DB_VERSION_MAJOR == 3 && DB_VERSION_MINOR > 2) || (DB_VERSION_MAJOR == 4)
                    if (dbi->dbi_bt_compare_fcn) {
                        rc = db->set_bt_compare(db, dbi->dbi_bt_compare_fcn);
                        rc = cvtdberr(dbi, "db->set_bt_compare", rc, _debug);
                        if (rc) break;
                    }
                    if (dbi->dbi_bt_dup_compare_fcn) {
                        rc = db->set_dup_compare(db, dbi->dbi_bt_dup_compare_fcn);
                        rc = cvtdberr(dbi, "db->set_dup_compare", rc, _debug);
                        if (rc) break;
                    }
                    if (dbi->dbi_bt_prefix_fcn) {
                        rc = db->set_bt_prefix(db, dbi->dbi_bt_prefix_fcn);
                        rc = cvtdberr(dbi, "db->set_bt_prefix", rc, _debug);
                        if (rc) break;
                    }
#endif
                    break;
                case DB_RECNO:
                    if (dbi->dbi_re_delim) {
/* 4.1: db->set_append_recno(???) */
                        rc = db->set_re_delim(db, dbi->dbi_re_delim);
                        rc = cvtdberr(dbi, "db->set_re_selim", rc, _debug);
                        if (rc) break;
                    }
                    if (dbi->dbi_re_len) {
                        rc = db->set_re_len(db, dbi->dbi_re_len);
                        rc = cvtdberr(dbi, "db->set_re_len", rc, _debug);
                        if (rc) break;
                    }
                    if (dbi->dbi_re_pad) {
                        rc = db->set_re_pad(db, dbi->dbi_re_pad);
                        rc = cvtdberr(dbi, "db->set_re_pad", rc, _debug);
                        if (rc) break;
                    }
                    if (dbi->dbi_re_source) {
                        rc = db->set_re_source(db, dbi->dbi_re_source);
                        rc = cvtdberr(dbi, "db->set_re_source", rc, _debug);
                        if (rc) break;
                    }
                    break;
                case DB_QUEUE:
                    if (dbi->dbi_q_extentsize) {
                        rc = db->set_q_extentsize(db, dbi->dbi_q_extentsize);
                        rc = cvtdberr(dbi, "db->set_q_extentsize", rc, _debug);
                        if (rc) break;
                    }
                    break;
                }
            }

            if (rc == 0) {
                const char * dbfullpath;
                const char * dbpath;
                char * t;
                int nb;

                nb = strlen(dbhome);
                if (dbfile)     nb += 1 + strlen(dbfile);
                dbfullpath = t = alloca(nb + 1);

/*@-boundswrite@*/
                t = stpcpy(t, dbhome);
                if (dbfile)
                    t = stpcpy( stpcpy( t, "/"), dbfile);
/*@=boundswrite@*/
#ifdef  HACK    /* XXX necessary to support dbsubfile */
                dbpath = (!dbi->dbi_use_dbenv && !dbi->dbi_temporary)
                        ? dbfullpath : dbfile;
#else
                dbpath = (!dbi->dbi_temporary)
                        ? dbfullpath : dbfile;
#endif

#if (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
                rc = (db->open)(db, txnid, dbpath, dbsubfile,
                    dbi->dbi_type, oflags, dbi->dbi_perms);
#else
                rc = (db->open)(db, dbpath, dbsubfile,
                    dbi->dbi_type, oflags, dbi->dbi_perms);
#endif

                if (rc == 0 && dbi->dbi_type == DB_UNKNOWN) {
#if (DB_VERSION_MAJOR == 3 && DB_VERSION_MINOR == 3 && DB_VERSION_PATCH == 11) \
 || (DB_VERSION_MAJOR == 4)
                    DBTYPE dbi_type = DB_UNKNOWN;
                    xx = db->get_type(db, &dbi_type);
                    if (xx == 0)
                        dbi->dbi_type = dbi_type;
#else
                    dbi->dbi_type = db->get_type(db);
#endif
                }
            }

            /* XXX return rc == errno without printing */
            _printit = (rc > 0 ? 0 : _debug);
            xx = cvtdberr(dbi, "db->open", rc, _printit);

            dbi->dbi_txnid = NULL;

            /*
             * Lock a file using fcntl(2). Traditionally this is Packages,
             * the file used to store metadata of installed header(s),
             * as Packages is always opened, and should be opened first,
             * for any rpmdb access.
             *
             * If no DBENV is used, then access is protected with a
             * shared/exclusive locking scheme, as always.
             *
             * With a DBENV, the fcntl(2) lock is necessary only to keep
             * the riff-raff from playing where they don't belong, as
             * the DBENV should provide it's own locking scheme. So try to
             * acquire a lock, but permit failures, as some other
             * DBENV player may already have acquired the lock.
             *
             * With NPTL posix mutexes, revert to fcntl lock on non-functioning
             * glibc/kernel combinations.
             */
            if (rc == 0 && dbi->dbi_lockdbfd &&
                !((dbi->dbi_ecflags & DB_CLIENT) && dbi->dbi_host) &&
                (!dbi->dbi_use_dbenv || _lockdbfd++ == 0))
            {
                int fdno = -1;

                if (!(db->fd(db, &fdno) == 0 && fdno >= 0)) {
                    rc = 1;
                } else {
                    struct flock l;
/*@-boundswrite@*/
                    memset(&l, 0, sizeof(l));
/*@=boundswrite@*/
                    l.l_whence = 0;
                    l.l_start = 0;
                    l.l_len = 0;
                    l.l_type = (dbi->dbi_mode & (O_RDWR|O_WRONLY))
                                ? F_WRLCK : F_RDLCK;
                    l.l_pid = 0;

                    rc = fcntl(fdno, F_SETLK, (void *) &l);
                    if (rc) {
                        /* Warning iff using non-private CDB locking. */
                        rc = ((dbi->dbi_use_dbenv &&
                                (dbi->dbi_eflags & DB_INIT_CDB) &&
                                !(dbi->dbi_eflags & DB_PRIVATE))
                            ? 0 : 1);
                        rpmError( (rc ? RPMERR_FLOCK : RPMWARN_FLOCK),
                                _("cannot get %s lock on %s/%s\n"),
                                ((dbi->dbi_mode & (O_RDWR|O_WRONLY))
                                        ? _("exclusive") : _("shared")),
                                dbhome, (dbfile ? dbfile : ""));
                    } else if (dbfile) {
                        rpmMessage(RPMMESS_DEBUG,
                                _("locked   db index       %s/%s\n"),
                                dbhome, dbfile);
                    }
                }
            }
        }
    }

    dbi->dbi_db = db;

    if (rc == 0 && dbi->dbi_db != NULL && dbip != NULL) {
        dbi->dbi_vec = &db3vec;
/*@-boundswrite@*/
        *dbip = dbi;
/*@=boundswrite@*/
    } else {
        dbi->dbi_verify_on_close = 0;
        (void) db3close(dbi, 0);
    }

    urlfn = _free(urlfn);

    /*@-nullstate -compmempass@*/
    return rc;
    /*@=nullstate =compmempass@*/
}

/*@-exportheadervar@*/
/*@observer@*/ /*@unchecked@*/
struct _dbiVec db3vec = {
    DB_VERSION_MAJOR, DB_VERSION_MINOR, DB_VERSION_PATCH,
    db3open, db3close, db3sync, db3associate, db3join,
    db3copen, db3cclose, db3cdup, db3cdel, db3cget, db3cpget, db3cput, db3ccount,
    db3byteswapped, db3stat
};
/*@=exportheadervar@*/
/*@=type@*/

---