From 34790c335fe6e5e1099c9320d7b3134398104120 Mon Sep 17 00:00:00 2001

Message-Id: <34790c335fe6e5e1099c9320d7b3134398104120.1624429665.git.pmatilai@redhat.com>

From: Panu Matilainen <pmatilai@redhat.com>

Date: Wed, 23 Jun 2021 08:24:44 +0300

Subject: [PATCH] Add read-only support for sqlite

Based on latest upstream sqlite backend version, chainsaw write support

out and adjust for the infra differences (which there are more than a

few) and add an error message instead.

---

 configure.ac         |  23 ++

 lib/Makefile.am      |   6 +

 lib/backend/dbi.c    |  14 +

 lib/backend/dbi.h    |   5 +

 lib/backend/sqlite.c | 659 +++++++++++++++++++++++++++++++++++++++++++

 macros.in            |   1 +

 6 files changed, 708 insertions(+)

 create mode 100644 lib/backend/sqlite.c

diff --git a/configure.ac b/configure.ac

index 3fcb3ff20..e04aced68 100644

--- a/configure.ac

+++ b/configure.ac

@@ -589,6 +589,29 @@ AS_IF([test "$enable_ndb" = yes],[

 ])

 AM_CONDITIONAL([NDB], [test "$enable_ndb" = yes])

+# Check for SQLITE support

+AC_ARG_ENABLE([sqlite],

+              [AS_HELP_STRING([--enable-sqlite=@<:@yes/no/auto@:>@)],

+                              [build with sqlite rpm database format support (default=yes)])],

+              [enable_sqlite="$enableval"],

+              [enable_sqlite=yes])

+

+AS_IF([test "x$enable_sqlite" != "xno"], [

+  PKG_CHECK_MODULES([SQLITE], [sqlite3 >= 3.22.0], [have_sqlite=yes], [have_sqlite=no])

+  AS_IF([test "$enable_sqlite" = "yes"], [

+    if test "$have_sqlite" = "no"; then

+      AC_MSG_ERROR([--enable-sqlite specified, but not available])

+    fi

+  ])

+])

+

+if test "x$have_sqlite" = "xyes"; then

+  AC_DEFINE([WITH_SQLITE], [1], [Define if SQLITE is available])

+  SQLITE_REQUIRES=sqlite

+  AC_SUBST(SQLITE_REQUIRES)

+fi

+AM_CONDITIONAL([SQLITE], [test "x$have_sqlite" = "xyes"])

+

 #=================

 # Check for LMDB support

 AC_ARG_ENABLE([lmdb],

diff --git a/lib/Makefile.am b/lib/Makefile.am

index baf3238ee..8a9fe77bd 100644

--- a/lib/Makefile.am

+++ b/lib/Makefile.am

@@ -76,6 +76,12 @@ librpm_la_SOURCES += \

 	backend/ndb/rpmxdb.h

 endif

+if SQLITE

+AM_CPPFLAGS += $(SQLITE_CFLAGS)

+librpm_la_LIBADD += $(SQLITE_LIBS)

+librpm_la_SOURCES += backend/sqlite.c

+endif

+

 if LMDB

 AM_CPPFLAGS += $(LMDB_CFLAGS)

 librpm_la_LIBADD += $(LMDB_LIBS)

diff --git a/lib/backend/dbi.c b/lib/backend/dbi.c

index e99a5f2b2..dc3587f58 100644

--- a/lib/backend/dbi.c

+++ b/lib/backend/dbi.c

@@ -48,6 +48,11 @@ dbDetectBackend(rpmdb rdb)

     if (!strcmp(db_backend, "ndb")) {

 	rdb->db_ops = &ndb_dbops;

     } else

+#endif

+#ifdef WITH_SQLITE

+    if (!strcmp(db_backend, "sqlite")) {

+	rdb->db_ops = &sqlite_dbops;

+    } else

 #endif

     {

 	rdb->db_ops = &db3_dbops;

@@ -75,6 +80,15 @@ dbDetectBackend(rpmdb rdb)

     free(path);

 #endif

+#ifdef WITH_SQLITE

+    path = rstrscat(NULL, dbhome, "/rpmdb.sqlite", NULL);

+    if (access(path, F_OK) == 0 && rdb->db_ops != &sqlite_dbops) {

+	rdb->db_ops = &sqlite_dbops;

+	rpmlog(RPMLOG_WARNING, _("Found SQLITE rpmdb.sqlite database while attempting %s backend: using sqlite backend.\n"), db_backend);

+    }

+    free(path);

+#endif

+

     path = rstrscat(NULL, dbhome, "/Packages", NULL);

     if (access(path, F_OK) == 0 && rdb->db_ops != &db3_dbops) {

 	rdb->db_ops = &db3_dbops;

diff --git a/lib/backend/dbi.h b/lib/backend/dbi.h

index 02f49c8fd..ff2b4f974 100644

--- a/lib/backend/dbi.h

+++ b/lib/backend/dbi.h

@@ -275,6 +275,11 @@ RPM_GNUC_INTERNAL

 extern struct rpmdbOps_s lmdb_dbops;

 #endif

+#if defined(WITH_SQLITE)

+RPM_GNUC_INTERNAL

+extern struct rpmdbOps_s sqlite_dbops;

+#endif

+

 #ifdef __cplusplus

 }

 #endif

diff --git a/lib/backend/sqlite.c b/lib/backend/sqlite.c

new file mode 100644

index 000000000..3caeba5f0

--- /dev/null

+++ b/lib/backend/sqlite.c

@@ -0,0 +1,659 @@

+#include "system.h"

+

+#include <sqlite3.h>

+#include <fcntl.h>

+

+#include <rpm/rpmlog.h>

+#include <rpm/rpmfileutil.h>

+#include <rpm/rpmmacro.h>

+#include "lib/rpmdb_internal.h"

+

+#include "debug.h"

+

+static const int sleep_ms = 50;

+

+struct dbiCursor_s {

+    sqlite3 *sdb;

+    sqlite3_stmt *stmt;

+    const char *fmt;

+    int flags;

+    rpmTagVal tag;

+    int ctype;

+    struct dbiCursor_s *subc;

+

+    const void *key;

+    unsigned int keylen;

+};

+

+static int sqlexec(sqlite3 *sdb, const char *fmt, ...);

+

+static void rpm_match3(sqlite3_context *sctx, int argc, sqlite3_value **argv)

+{

+    int match = 0;

+    if (argc == 3) {

+	int b1len = sqlite3_value_bytes(argv[0]);

+	int b2len = sqlite3_value_bytes(argv[1]);

+	int n = sqlite3_value_int(argv[2]);

+	if (b1len >= n && b2len >= n) {

+	    const char *b1 = sqlite3_value_blob(argv[0]);

+	    const char *b2 = sqlite3_value_blob(argv[1]);

+	    match = (memcmp(b1, b2, n) == 0);

+	}

+    }

+    sqlite3_result_int(sctx, match);

+}

+

+static void errCb(void *data, int err, const char *msg)

+{

+    rpmdb rdb = data;

+    rpmlog(RPMLOG_WARNING, "%s: %s: %s\n",

+		rdb->db_descr, sqlite3_errstr(err), msg);

+}

+

+static int dbiCursorReset(dbiCursor dbc)

+{

+    if (dbc->stmt) {

+	sqlite3_reset(dbc->stmt);

+	sqlite3_clear_bindings(dbc->stmt);

+    }

+    return 0;

+}

+

+static int dbiCursorResult(dbiCursor dbc)

+{

+    int rc = sqlite3_errcode(dbc->sdb);

+    int err = (rc != SQLITE_OK && rc != SQLITE_DONE && rc != SQLITE_ROW);

+    if (err) {

+	rpmlog(RPMLOG_ERR, "%s: %d: %s\n", sqlite3_sql(dbc->stmt),

+		sqlite3_errcode(dbc->sdb), sqlite3_errmsg(dbc->sdb));

+    }

+    return err ? RPMRC_FAIL : RPMRC_OK;

+}

+

+static int dbiCursorPrep(dbiCursor dbc, const char *fmt, ...)

+{

+    if (dbc->stmt == NULL) {

+	char *cmd = NULL;

+	va_list ap;

+

+	va_start(ap, fmt); 

+	cmd = sqlite3_vmprintf(fmt, ap);

+	va_end(ap);

+

+	sqlite3_prepare_v2(dbc->sdb, cmd, -1, &dbc->stmt, NULL);

+	sqlite3_free(cmd);

+    } else {

+	dbiCursorReset(dbc);

+    }

+

+    return dbiCursorResult(dbc);

+}

+

+static int dbiCursorBindPkg(dbiCursor dbc, unsigned int hnum,

+				void *blob, unsigned int bloblen)

+{

+    int rc = 0;

+

+    if (hnum)

+	rc = sqlite3_bind_int(dbc->stmt, 1, hnum);

+    else

+	rc = sqlite3_bind_null(dbc->stmt, 1);

+

+    if (blob) {

+	if (!rc)

+	    rc = sqlite3_bind_blob(dbc->stmt, 2, blob, bloblen, NULL);

+    }

+    return dbiCursorResult(dbc);

+}

+

+static int dbiCursorBindIdx(dbiCursor dbc, const void *key, int keylen,

+				dbiIndexItem rec)

+{

+    int rc;

+    if (dbc->ctype == SQLITE_TEXT) {

+	rc = sqlite3_bind_text(dbc->stmt, 1, key, keylen, NULL);

+    } else {

+	rc = sqlite3_bind_blob(dbc->stmt, 1, key, keylen, NULL);

+    }

+

+    if (rec) {

+	if (!rc)

+	    rc = sqlite3_bind_int(dbc->stmt, 2, rec->hdrNum);

+	if (!rc)

+	    rc = sqlite3_bind_int(dbc->stmt, 3, rec->tagNum);

+    }

+

+    return dbiCursorResult(dbc);

+}

+

+static int sqlite_init(rpmdb rdb, const char * dbhome)

+{

+    int rc = 0;

+    char *dbfile = NULL;

+

+    if (rdb->db_dbenv == NULL) {

+	dbfile = rpmGenPath(dbhome, "rpmdb.sqlite", NULL);

+	sqlite3 *sdb = NULL;

+	int xx, flags = 0;

+	int retry_open = 1;

+

+	free(rdb->db_descr);

+	rdb->db_descr = xstrdup("sqlite");

+

+	if ((rdb->db_mode & O_ACCMODE) == O_RDONLY)

+	    flags |= SQLITE_OPEN_READONLY;

+	else {

+	    rpmlog(RPMLOG_ERR,

+		_("unable to open sqlite database %s for writing, sqlite support is read-only\n"), dbfile);

+	    rc = RPMRC_FAIL;

+	    goto exit;

+	}

+

+	while (retry_open--) {

+	    xx = sqlite3_open_v2(dbfile, &sdb, flags, NULL);

+	    /* Attempt to create if missing, discarding OPEN_READONLY (!) */

+	    if (xx == SQLITE_CANTOPEN && (flags & SQLITE_OPEN_READONLY)) {

+		/* Sqlite allocates resources even on failure to open (!) */

+		sqlite3_close(sdb);

+		flags &= ~SQLITE_OPEN_READONLY;

+		flags |= (SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE);

+		retry_open++;

+	    }

+	}

+

+	if (xx != SQLITE_OK) {

+	    rpmlog(RPMLOG_ERR, _("Unable to open sqlite database %s: %s\n"),

+		    dbfile, sqlite3_errstr(xx));

+	    rc = 1;

+	    goto exit;

+	}

+

+	sqlite3_create_function(sdb, "match", 3,

+				(SQLITE_UTF8|SQLITE_DETERMINISTIC),

+				NULL, rpm_match3, NULL, NULL);

+

+	sqlite3_busy_timeout(sdb, sleep_ms);

+	sqlite3_config(SQLITE_CONFIG_LOG, errCb, rdb);

+

+	sqlexec(sdb, "PRAGMA secure_delete = OFF");

+	sqlexec(sdb, "PRAGMA case_sensitive_like = ON");

+

+	if (sqlite3_db_readonly(sdb, NULL) == 0) {

+	    if (sqlexec(sdb, "PRAGMA journal_mode = WAL") == 0) {

+		int one = 1;

+		/* Annoying but necessary to support non-privileged readers */

+		sqlite3_file_control(sdb, NULL, SQLITE_FCNTL_PERSIST_WAL, &one);

+

+		if (!rpmExpandNumeric("%{?_flush_io}"))

+		    sqlexec(sdb, "PRAGMA wal_autocheckpoint = 0");

+	    }

+	}

+

+	rdb->db_dbenv = sdb;

+    }

+    rdb->db_opens++;

+

+exit:

+    free(dbfile);

+    return rc;

+}

+

+static int sqlite_fini(rpmdb rdb)

+{

+    int rc = 0;

+    if (rdb) {

+	sqlite3 *sdb = rdb->db_dbenv;

+	if (rdb->db_opens > 1) {

+	    rdb->db_opens--;

+	} else {

+	    if (sqlite3_db_readonly(sdb, NULL) == 0) {

+		sqlexec(sdb, "PRAGMA optimize");

+		sqlexec(sdb, "PRAGMA wal_checkpoint = TRUNCATE");

+	    }

+	    rdb->db_dbenv = NULL;

+	    int xx = sqlite3_close(sdb);

+	    rc = (xx != SQLITE_OK);

+	}

+    }

+

+    return rc;

+}

+

+static int sqlexec(sqlite3 *sdb, const char *fmt, ...)

+{

+    int rc = 0;

+    char *cmd = NULL;

+    char *err = NULL;

+    va_list ap;

+

+    va_start(ap, fmt);

+    cmd = sqlite3_vmprintf(fmt, ap);

+    va_end(ap);

+

+    /* sqlite3_exec() doesn't seeem to honor sqlite3_busy_timeout() */

+    while ((rc = sqlite3_exec(sdb, cmd, NULL, NULL, &err)) == SQLITE_BUSY) {

+	usleep(sleep_ms);

+    }

+

+    if (rc)

+	rpmlog(RPMLOG_ERR, "sqlite failure: %s: %s\n", cmd, err);

+    else

+	rpmlog(RPMLOG_DEBUG, "%s: %d\n", cmd, rc);

+

+    sqlite3_free(cmd);

+

+    return rc ? RPMRC_FAIL : RPMRC_OK;

+}

+

+static int dbiExists(dbiIndex dbi)

+{

+    const char *col = (dbi->dbi_type == DBI_PRIMARY) ? "hnum" : "key";

+    const char *tbl = dbi->dbi_file;

+    int rc = sqlite3_table_column_metadata(dbi->dbi_db, NULL, tbl, col,

+					   NULL, NULL, NULL, NULL, NULL);

+    return (rc == 0);

+}

+

+static int init_table(dbiIndex dbi, rpmTagVal tag)

+{

+    int rc = 0;

+

+    if (dbiExists(dbi))

+	return 0;

+

+    if (dbi->dbi_type == DBI_PRIMARY) {

+	rc = sqlexec(dbi->dbi_db,

+			"CREATE TABLE IF NOT EXISTS '%q' ("

+			    "hnum INTEGER PRIMARY KEY AUTOINCREMENT,"

+			    "blob BLOB NOT NULL"

+			")",

+			dbi->dbi_file);

+    } else {

+	const char *keytype = (rpmTagGetClass(tag) == RPM_STRING_CLASS) ?

+				"TEXT" : "BLOB";

+	rc = sqlexec(dbi->dbi_db,

+			"CREATE TABLE IF NOT EXISTS '%q' ("

+			    "key '%q' NOT NULL, "

+			    "hnum INTEGER NOT NULL, "

+			    "idx INTEGER NOT NULL, "

+			    "FOREIGN KEY (hnum) REFERENCES 'Packages'(hnum)"

+			")",

+			dbi->dbi_file, keytype);

+    }

+    if (!rc)

+	dbi->dbi_flags |= DBI_CREATED;

+

+    return rc;

+}

+

+static int create_index(sqlite3 *sdb, const char *table, const char *col)

+{

+    return sqlexec(sdb,

+		"CREATE INDEX IF NOT EXISTS '%s_%s_idx' ON '%q'(%s ASC)",

+		table, col, table, col);

+}

+

+static int init_index(dbiIndex dbi, rpmTagVal tag)

+{

+    int rc = 0;

+

+    /* Can't create on readonly database, but things will still work */

+    if (sqlite3_db_readonly(dbi->dbi_db, NULL) == 1)

+	return 0;

+

+    if (dbi->dbi_type == DBI_SECONDARY) {

+	int string = (rpmTagGetClass(tag) == RPM_STRING_CLASS);

+	int array = (rpmTagGetReturnType(tag) == RPM_ARRAY_RETURN_TYPE);

+	if (!rc && string)

+	    rc = create_index(dbi->dbi_db, dbi->dbi_file, "key");

+	if (!rc && array)

+	    rc = create_index(dbi->dbi_db, dbi->dbi_file, "hnum");

+    }

+    return rc;

+}

+

+static int sqlite_Open(rpmdb rdb, rpmDbiTagVal rpmtag, dbiIndex * dbip, int flags)

+{

+    int rc = sqlite_init(rdb, rpmdbHome(rdb));

+

+    if (!rc) {

+	dbiIndex dbi = dbiNew(rdb, rpmtag);

+	dbi->dbi_db = rdb->db_dbenv;

+

+	rc = init_table(dbi, rpmtag);

+

+	if (!rc && !(rdb->db_flags & RPMDB_FLAG_REBUILD))

+	    rc = init_index(dbi, rpmtag);

+

+	if (!rc && dbip)

+	    *dbip = dbi;

+	else

+	    dbiFree(dbi);

+    }

+

+    return rc;

+}

+

+static int sqlite_Close(dbiIndex dbi, unsigned int flags)

+{

+    rpmdb rdb = dbi->dbi_rpmdb;

+    int rc = 0;

+    if (rdb->db_flags & RPMDB_FLAG_REBUILD)

+	rc = init_index(dbi, rpmTagGetValue(dbi->dbi_file));

+    sqlite_fini(dbi->dbi_rpmdb);

+    dbiFree(dbi);

+    return rc;

+}

+

+static int sqlite_Verify(dbiIndex dbi, unsigned int flags)

+{

+    int errors = -1;

+    int key_errors = -1;

+    sqlite3_stmt *s = NULL;

+    const char *cmd = "PRAGMA integrity_check";

+

+    if (dbi->dbi_type == DBI_SECONDARY)

+	return RPMRC_OK;

+

+    if (sqlite3_prepare_v2(dbi->dbi_db, cmd, -1, &s, NULL) == SQLITE_OK) {

+	errors = 0;

+	while (sqlite3_step(s) == SQLITE_ROW) {

+	    const char *txt = (const char *)sqlite3_column_text(s, 0);

+	    if (!rstreq(txt, "ok")) {

+		errors++;

+		rpmlog(RPMLOG_ERR, "verify: %s\n", txt);

+	    }

+	}

+	sqlite3_finalize(s);

+    } else {

+	rpmlog(RPMLOG_ERR, "%s: %s\n", cmd, sqlite3_errmsg(dbi->dbi_db));

+    }

+

+    /* No point checking higher-level errors if low-level errors exist */

+    if (errors)

+	goto exit;

+

+    cmd = "PRAGMA foreign_key_check";

+    if (sqlite3_prepare_v2(dbi->dbi_db, cmd, -1, &s, NULL) == SQLITE_OK) {

+	key_errors = 0;

+	while (sqlite3_step(s) == SQLITE_ROW) {

+	    key_errors++;

+	    rpmlog(RPMLOG_ERR, "verify key: %s[%lld]\n",

+				sqlite3_column_text(s, 0),

+				sqlite3_column_int64(s, 1));

+	}

+	sqlite3_finalize(s);

+    } else {

+	rpmlog(RPMLOG_ERR, "%s: %s\n", cmd, sqlite3_errmsg(dbi->dbi_db));

+    }

+

+exit:

+

+    return (errors == 0 && key_errors == 0) ? RPMRC_OK : RPMRC_FAIL;

+}

+

+static void sqlite_SetFSync(rpmdb rdb, int enable)

+{

+    if (rdb->db_dbenv) {

+	sqlexec(rdb->db_dbenv,

+	    "PRAGMA synchronous = %s", enable ? "FULL" : "OFF");

+    }

+}

+

+static int sqlite_Ctrl(rpmdb rdb, dbCtrlOp ctrl)

+{

+    int rc = 0;

+

+    switch (ctrl) {

+    case DB_CTRL_LOCK_RW:

+	rc = sqlexec(rdb->db_dbenv, "SAVEPOINT 'rwlock'");

+	break;

+    case DB_CTRL_UNLOCK_RW:

+	rc = sqlexec(rdb->db_dbenv, "RELEASE 'rwlock'");

+	break;

+    default:

+	break;

+    }

+

+    return rc;

+}

+

+static dbiCursor sqlite_CursorInit(dbiIndex dbi, unsigned int flags)

+{

+    dbiCursor dbc = xcalloc(1, sizeof(*dbc));

+    dbc->sdb = dbi->dbi_db;

+    dbc->flags = flags;

+    dbc->tag = rpmTagGetValue(dbi->dbi_file);

+    if (rpmTagGetClass(dbc->tag) == RPM_STRING_CLASS) {

+	dbc->ctype = SQLITE_TEXT;

+    } else {

+	dbc->ctype = SQLITE_BLOB;

+    }

+    if (dbc->flags & DBC_WRITE)

+	sqlexec(dbc->sdb, "SAVEPOINT '%s'", dbi->dbi_file);

+    return dbc;

+}

+

+static dbiCursor sqlite_CursorFree(dbiIndex dbi, dbiCursor dbc)

+{

+    if (dbc) {

+	sqlite3_finalize(dbc->stmt);

+	if (dbc->subc)

+	    dbiCursorFree(dbi, dbc->subc);

+	if (dbc->flags & DBC_WRITE)

+	    sqlexec(dbc->sdb, "RELEASE '%s'", dbi->dbi_file);

+	free(dbc);

+    }

+    return NULL;

+}

+

+static rpmRC sqlite_pkgdbNew(dbiIndex dbi, dbiCursor dbc, unsigned int *hdrNum)

+{

+    return RPMRC_FAIL;

+}

+

+static rpmRC sqlite_pkgdbPut(dbiIndex dbi, dbiCursor dbc,  unsigned int hdrNum, unsigned char *hdrBlob, unsigned int hdrLen)

+{

+    return RPMRC_FAIL;

+}

+

+static rpmRC sqlite_pkgdbDel(dbiIndex dbi, dbiCursor dbc,  unsigned int hdrNum)

+{

+    return RPMRC_FAIL;

+}

+

+static rpmRC sqlite_stepPkg(dbiCursor dbc, unsigned char **hdrBlob, unsigned int *hdrLen)

+{

+    int rc = sqlite3_step(dbc->stmt);

+

+    if (rc == SQLITE_ROW) {

+	if (hdrLen)

+	    *hdrLen = sqlite3_column_bytes(dbc->stmt, 1);

+	if (hdrBlob)

+	    *hdrBlob = (void *) sqlite3_column_blob(dbc->stmt, 1);

+    }

+    return rc;

+}

+

+static rpmRC sqlite_pkgdbByKey(dbiIndex dbi, dbiCursor dbc, unsigned int hdrNum, unsigned char **hdrBlob, unsigned int *hdrLen)

+{

+    int rc = dbiCursorPrep(dbc, "SELECT hnum, blob FROM '%q' WHERE hnum=?",

+				dbi->dbi_file);

+

+    if (!rc)

+	rc = dbiCursorBindPkg(dbc, hdrNum, NULL, 0);

+

+    if (!rc)

+	rc = sqlite_stepPkg(dbc, hdrBlob, hdrLen);

+

+    return dbiCursorResult(dbc);

+}

+

+static rpmRC sqlite_pkgdbIter(dbiIndex dbi, dbiCursor dbc,

+				unsigned char **hdrBlob, unsigned int *hdrLen)

+{

+    int rc = RPMRC_OK;

+    if (dbc->stmt == NULL) {

+	rc = dbiCursorPrep(dbc, "SELECT hnum, blob FROM '%q'", dbi->dbi_file);

+    }

+

+    if (!rc)

+	rc = sqlite_stepPkg(dbc, hdrBlob, hdrLen);

+

+    if (rc == SQLITE_DONE) {

+	rc = RPMRC_NOTFOUND;

+    } else {

+	rc = dbiCursorResult(dbc);

+    }

+

+    return rc;

+}

+

+static rpmRC sqlite_pkgdbGet(dbiIndex dbi, dbiCursor dbc, unsigned int hdrNum, unsigned char **hdrBlob, unsigned int *hdrLen)

+{

+    int rc;

+

+    if (hdrNum) {

+	rc = sqlite_pkgdbByKey(dbi, dbc, hdrNum, hdrBlob, hdrLen);

+    } else {

+	rc = sqlite_pkgdbIter(dbi, dbc, hdrBlob, hdrLen);

+    }

+

+    return rc;

+}

+

+static unsigned int sqlite_pkgdbKey(dbiIndex dbi, dbiCursor dbc)

+{

+    return sqlite3_column_int(dbc->stmt, 0);

+}

+

+static rpmRC sqlite_idxdbByKey(dbiIndex dbi, dbiCursor dbc,

+			    const char *keyp, size_t keylen, int searchType,

+			    dbiIndexSet *set)

+{

+    int rc = RPMRC_NOTFOUND;

+

+    if (searchType == DBC_PREFIX_SEARCH) {

+	rc = dbiCursorPrep(dbc, "SELECT hnum, idx FROM '%q' "

+				"WHERE MATCH(key,'%q',%d) "

+				"ORDER BY key",

+				dbi->dbi_file, keyp, keylen);

+    } else {

+	rc = dbiCursorPrep(dbc, "SELECT hnum, idx FROM '%q' WHERE key=?",

+			dbi->dbi_file);

+	if (!rc)

+	    rc = dbiCursorBindIdx(dbc, keyp, keylen, NULL);

+    }

+

+

+    if (!rc) {

+	while ((rc = sqlite3_step(dbc->stmt)) == SQLITE_ROW) {

+	    unsigned int hnum = sqlite3_column_int(dbc->stmt, 0);

+	    unsigned int tnum = sqlite3_column_int(dbc->stmt, 1);

+

+	    if (*set == NULL)

+		*set = dbiIndexSetNew(5);

+	    dbiIndexSetAppendOne(*set, hnum, tnum, 0);

+	}

+    }

+

+    if (rc == SQLITE_DONE) {

+	rc = (*set) ? RPMRC_OK : RPMRC_NOTFOUND;

+    } else {

+	rc = dbiCursorResult(dbc);

+    }

+

+    return rc;

+}

+

+static rpmRC sqlite_idxdbIter(dbiIndex dbi, dbiCursor dbc, dbiIndexSet *set)

+{

+    int rc = RPMRC_OK;

+

+    if (dbc->stmt == NULL) {

+	rc = dbiCursorPrep(dbc, "SELECT DISTINCT key FROM '%q' ORDER BY key",

+				dbi->dbi_file);

+	if (set)

+	    dbc->subc = dbiCursorInit(dbi, 0);

+    }

+

+    if (!rc)

+	rc = sqlite3_step(dbc->stmt);

+

+    if (rc == SQLITE_ROW) {

+	if (dbc->ctype == SQLITE_TEXT) {

+	    dbc->key = sqlite3_column_text(dbc->stmt, 0);

+	} else {

+	    dbc->key = sqlite3_column_blob(dbc->stmt, 0);

+	}

+	dbc->keylen = sqlite3_column_bytes(dbc->stmt, 0);

+	if (dbc->subc) {

+	    rc = sqlite_idxdbByKey(dbi, dbc->subc, dbc->key, dbc->keylen,

+				    DBC_NORMAL_SEARCH, set);

+	} else {

+	    rc = RPMRC_OK;

+	}

+    } else if (rc == SQLITE_DONE) {