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#include <sys/types.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <db.h>
#define RPMDB_HOME "/tmp/rpm"
#define RPMDB_Packages "Packages"
#define RPMDB_Dirnames "Dirnames"
#define RPMDB_Basenames "Basenames"
static int nentries = 100;
static int
rnum(int rmin, int rmax)
{
static int initialized = 0;
if (!initialized) {
srand((unsigned)getpid());
initialized = 1;
}
return (rmin + (rand() % rmax));
}
static int
db_init(const char * home, DB_ENV ** dbenvp)
{
DB_ENV * dbenv;
u_int32_t flags;
int ret;
if ((ret = db_env_create(&dbenv, 0)) != 0)
goto exit;
dbenv->set_errfile(dbenv, stderr);
dbenv->set_errpfx(dbenv, "tjfn");
flags = DB_CREATE | DB_INIT_MPOOL;
if ((ret = dbenv->open(dbenv, home, flags, 0)) != 0)
goto exit;
exit:
if (dbenvp != NULL && ret == 0)
*dbenvp = dbenv;
else if (dbenv)
(void) dbenv->close(dbenv, 0);
return ret;
}
static int
db_open(const char * dbfn, DB_ENV * dbenv, DB ** dbp)
{
DB * db = NULL;
int ret;
if ((ret = db_create(&db, dbenv, 0)) != 0) {
fprintf(stderr, "db_create: %s\n", db_strerror(ret));
goto err;
}
if ((ret = db->set_flags(db, DB_DUP)) != 0) {
db->err(db, ret, "db->set_flags(%s)", dbfn);
goto err;
}
if ((ret = db->open(db, dbfn, NULL, DB_BTREE, DB_CREATE, 0664)) != 0) {
db->err(db, ret, "db->open(%s)", dbfn);
goto err;
}
err:
if (dbp != NULL && ret == 0)
*dbp = db;
else if (db)
(void) db->close(db, 0);
return ret;
}
static int
db_put(DB * db, const char * kstr, int klen, const char * dstr, int dlen)
{
DBT key, data;
int ret;
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
if (klen <= 0)
klen = strlen(kstr) + 1;
if (dlen <= 0)
dlen = strlen(dstr) + 1;
key.data = (void *)kstr;
key.size = klen;
data.data = (void *)dstr;
data.size = dlen;
ret = db->put(db, NULL, &key, &data, 0);
if (ret == DB_KEYEXIST)
ret = 0;
return ret;
}
static int
db_join(DB * pkgdb, DB * dndb, DB * bndb)
{
char kstr[256], dstr[256];
DBC *dndbc = NULL;
DBC *bndbc = NULL;
DBC *dbc = NULL;
DBC *carray[3];
DBT bnkey, bndata;
DBT dnkey, dndata;
DBT key, data;
int ret, tret;
int i, j, k;
if ((ret = dndb->cursor(dndb, NULL, &dndbc, 0)) != 0)
goto err;
i = rnum(0, nentries);
j = i;
k = i;
sprintf(kstr, "DN%d", i);
sprintf(dstr, "%04d", k);
memset(&dnkey, 0, sizeof(dnkey));
memset(&dndata, 0, sizeof(dndata));
dnkey.data = kstr;
dnkey.size = strlen(kstr) + 1;
dnkey.ulen = 0;
dnkey.dlen = 0;
dnkey.doff = 0;
dnkey.flags = 0;
if ((ret = dndbc->c_get(dndbc, &dnkey, &dndata, DB_SET_RANGE)) != 0)
goto err;
if ((ret = bndb->cursor(bndb, NULL, &bndbc, 0)) != 0)
goto err;
sprintf(kstr, "BN%d", i);
sprintf(dstr, "%04d", i);
memset(&bnkey, 0, sizeof(bnkey));
memset(&bndata, 0, sizeof(bndata));
bnkey.data = kstr;
bnkey.size = strlen(kstr) + 1;
bnkey.ulen = 0;
bnkey.dlen = 0;
bnkey.doff = 0;
bnkey.flags = 0;
if ((ret = bndbc->c_get(bndbc, &bnkey, &bndata, DB_SET_RANGE)) != 0)
goto err;
carray[0] = dndbc;
carray[1] = bndbc;
carray[2] = NULL;
if ((ret = pkgdb->join(pkgdb, carray, &dbc, 0)) != 0)
goto err;
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
while ((ret = dbc->c_get(dbc, &key, &data, DB_JOIN_ITEM)) == 0) {
/* Process record returned in key/data. */
fprintf(stderr, "*** Get db %p key (%s,%d) data (%s,%d)\n", pkgdb, (char *)key.data, key.size, (char *)data.data, data.size);
}
/*
* If we exited the loop because we ran out of records,
* then it has completed successfully.
*/
if (ret == DB_NOTFOUND)
ret = 0;
err:
if (dbc != NULL && (tret = dbc->c_close(dbc)) != 0 && ret == 0)
ret = tret;
if (dndbc != NULL && (tret = dndbc->c_close(dndbc)) != 0 && ret == 0)
ret = tret;
if (bndbc != NULL && (tret = bndbc->c_close(bndbc)) != 0 && ret == 0)
ret = tret;
return (ret);
}
int
main(int argc, char *argv[])
{
char kstr[256], dstr[256];
DB_ENV * dbenv = NULL;
DB * pkgdb = NULL;
DB * dndb = NULL;
DB * bndb = NULL;
int ret, t_ret;
int i;
(void) mkdir(RPMDB_HOME, 0755);
if ((ret = db_init(RPMDB_HOME, &dbenv)) != 0) {
fprintf(stderr, "db_init(%s): %s\n", RPMDB_HOME, db_strerror(ret));
goto err;
}
if ((ret = db_open(RPMDB_Packages, dbenv, &pkgdb)) != 0) {
fprintf(stderr, "db_open(%s): %s\n", RPMDB_Packages, db_strerror(ret));
goto err;
}
for (i = 0; i < nentries; i++) {
sprintf(kstr, "%08d", i);
sprintf(dstr, "PKG%d", i);
if ((ret = db_put(pkgdb, kstr, 0, dstr, 0)) != 0) {
fprintf(stderr, "db_put(%s): %s\n", RPMDB_Packages, db_strerror(ret));
goto err;
}
}
if ((ret = db_open(RPMDB_Dirnames, dbenv, &dndb)) != 0) {
fprintf(stderr, "db_open(%s): %s\n", RPMDB_Dirnames, db_strerror(ret));
goto err;
}
for (i = 0; i < nentries; i++) {
sprintf(kstr, "DN%d", i);
sprintf(dstr, "%08d", i);
if ((ret = db_put(dndb, kstr, 0, dstr, 0)) != 0) {
fprintf(stderr, "db_put(%s): %s\n", RPMDB_Dirnames, db_strerror(ret));
goto err;
}
}
if ((ret = db_open(RPMDB_Basenames, dbenv, &bndb)) != 0) {
fprintf(stderr, "db_open(%s): %s\n", RPMDB_Basenames, db_strerror(ret));
goto err;
}
for (i = 0; i < nentries; i++) {
sprintf(kstr, "BN%d", i);
sprintf(dstr, "%08d", i);
if ((ret = db_put(bndb, kstr, 0, dstr, 0)) != 0) {
fprintf(stderr, "db_put(%s): %s\n", RPMDB_Basenames, db_strerror(ret));
goto err;
}
}
if ((ret = db_join(pkgdb, dndb, bndb)) != 0) {
fprintf(stderr, "db_join: %s\n", db_strerror(ret));
goto err;
}
err:
if (dbenv != NULL) {
if (pkgdb != NULL) {
if ((t_ret = pkgdb->close(pkgdb, 0)) != 0 && ret == 0)
ret = t_ret;
}
if (dndb != NULL) {
if ((t_ret = dndb->close(dndb, 0)) != 0 && ret == 0)
ret = t_ret;
}
if (bndb != NULL) {
if ((t_ret = bndb->close(bndb, 0)) != 0 && ret == 0)
ret = t_ret;
}
(void) dbenv->close(dbenv, 0);
}
return 0;
}
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