Move database 'version' check to registration time

This is another step toward doing both local database validation
(ensuring we don't have depends files) and sync database validation (via
signatures if present) when the database is registered.

Signed-off-by: Dan McGee <dan@archlinux.org>

6 files changed, 59 insertions, 86 deletions

diff --git a/lib/libalpm/alpm.c b/lib/libalpm/alpm.c
index 9b9719d1..b0bbbe8c 100644
--- a/lib/libalpm/alpm.c
+++ b/lib/libalpm/alpm.c
@@ -70,7 +70,7 @@ pmhandle_t SYMEXPORT *alpm_initialize(const char *root, const char *dbpath,
 	snprintf(myhandle->lockfile, lockfilelen, "%s%s", myhandle->dbpath, lf);
 
 	if(_alpm_db_register_local(myhandle) == NULL) {
-		myerr = PM_ERR_DB_CREATE;
+		myerr = myhandle->pm_errno;
 		goto cleanup;
 	}
 
diff --git a/lib/libalpm/be_local.c b/lib/libalpm/be_local.c
index 4b2a3017..0ff51deb 100644
--- a/lib/libalpm/be_local.c
+++ b/lib/libalpm/be_local.c
@@ -314,6 +314,56 @@ static int is_dir(const char *path, struct dirent *entry)
 	return 0;
 }
 
+static int local_db_validate(pmdb_t *db)
+{
+	struct dirent *ent = NULL;
+	const char *dbpath;
+	DIR *dbdir;
+	int ret = -1;
+
+	dbpath = _alpm_db_path(db);
+	if(dbpath == NULL) {
+		RET_ERR(db->handle, PM_ERR_DB_OPEN, -1);
+	}
+	dbdir = opendir(dbpath);
+	if(dbdir == NULL) {
+		if(errno == ENOENT) {
+			/* database dir doesn't exist yet */
+			return 0;
+		} else {
+			RET_ERR(db->handle, PM_ERR_DB_OPEN, -1);
+		}
+	}
+
+	while((ent = readdir(dbdir)) != NULL) {
+		const char *name = ent->d_name;
+		char path[PATH_MAX];
+
+		if(strcmp(name, ".") == 0 || strcmp(name, "..") == 0) {
+			continue;
+		}
+		if(!is_dir(dbpath, ent)) {
+			continue;
+		}
+
+		snprintf(path, PATH_MAX, "%s%s/depends", dbpath, name);
+		if(access(path, F_OK) == 0) {
+			/* we found a depends file- bail */
+			db->handle->pm_errno = PM_ERR_DB_VERSION;
+			goto done;
+		}
+	}
+	/* we found no depends file after full scan */
+	ret = 0;
+
+done:
+	if(dbdir) {
+		closedir(dbdir);
+	}
+
+	return ret;
+}
+
 static int local_db_populate(pmdb_t *db)
 {
 	size_t est_count;
@@ -328,6 +378,7 @@ static int local_db_populate(pmdb_t *db)
 		/* pm_errno set in _alpm_db_path() */
 		return -1;
 	}
+
 	dbdir = opendir(dbpath);
 	if(dbdir == NULL) {
 		if(errno == ENOENT) {
@@ -867,62 +918,9 @@ int _alpm_local_db_remove(pmdb_t *db, pmpkg_t *info)
 	return ret;
 }
 
-static int local_db_version(pmdb_t *db)
-{
-	struct dirent *ent = NULL;
-	const char *dbpath;
-	DIR *dbdir;
-	int version;
-
-	dbpath = _alpm_db_path(db);
-	if(dbpath == NULL) {
-		RET_ERR(db->handle, PM_ERR_DB_OPEN, -1);
-	}
-	dbdir = opendir(dbpath);
-	if(dbdir == NULL) {
-		if(errno == ENOENT) {
-			/* database dir doesn't exist yet */
-			version = 2;
-			goto done;
-		} else {
-			RET_ERR(db->handle, PM_ERR_DB_OPEN, -1);
-		}
-	}
-
-	while((ent = readdir(dbdir)) != NULL) {
-		const char *name = ent->d_name;
-		char path[PATH_MAX];
-
-		if(strcmp(name, ".") == 0 || strcmp(name, "..") == 0) {
-			continue;
-		}
-		if(!is_dir(dbpath, ent)) {
-			continue;
-		}
-
-		snprintf(path, PATH_MAX, "%s%s/depends", dbpath, name);
-		if(access(path, F_OK) == 0) {
-			/* we found a depends file- bail */
-			version = 1;
-			goto done;
-		}
-	}
-	/* we found no depends file after full scan */
-	version = 2;
-
-done:
-	if(dbdir) {
-		closedir(dbdir);
-	}
-
-	_alpm_log(db->handle, PM_LOG_DEBUG, "local database version %d\n", version);
-	return version;
-}
-
 struct db_operations local_db_ops = {
 	.populate         = local_db_populate,
 	.unregister       = _alpm_db_unregister,
-	.version          = local_db_version,
 };
 
 pmdb_t *_alpm_db_register_local(pmhandle_t *handle)
@@ -933,11 +931,18 @@ pmdb_t *_alpm_db_register_local(pmhandle_t *handle)
 
 	db = _alpm_db_new("local", 1);
 	if(db == NULL) {
+		handle->pm_errno = PM_ERR_DB_CREATE;
 		return NULL;
 	}
 	db->ops = &local_db_ops;
 	db->handle = handle;
 
+	if(local_db_validate(db)) {
+		/* pm_errno set in local_db_validate() */
+		_alpm_db_free(db);
+		return NULL;
+	}
+
 	handle->db_local = db;
 	return db;
 }
diff --git a/lib/libalpm/be_sync.c b/lib/libalpm/be_sync.c
index 2cf90544..1a434f24 100644
--- a/lib/libalpm/be_sync.c
+++ b/lib/libalpm/be_sync.c
@@ -559,15 +559,9 @@ error:
 	return -1;
 }
 
-static int sync_db_version(pmdb_t UNUSED *db)
-{
-	return 2;
-}
-
 struct db_operations sync_db_ops = {
 	.populate         = sync_db_populate,
 	.unregister       = _alpm_db_unregister,
-	.version          = sync_db_version,
 };
 
 pmdb_t *_alpm_db_register_sync(pmhandle_t *handle, const char *treename,
diff --git a/lib/libalpm/db.c b/lib/libalpm/db.c
index 2b50c064..820261a1 100644
--- a/lib/libalpm/db.c
+++ b/lib/libalpm/db.c
@@ -370,14 +370,6 @@ const char *_alpm_db_path(pmdb_t *db)
 	return db->_path;
 }
 
-int _alpm_db_version(pmdb_t *db)
-{
-	if(!db) {
-		return -1;
-	}
-	return db->ops->version(db);
-}
-
 char *_alpm_db_sig_path(pmdb_t *db)
 {
 	char *sigpath;
@@ -522,11 +514,6 @@ pmpkghash_t *_alpm_db_get_pkgcache_hash(pmdb_t *db)
 		_alpm_db_load_pkgcache(db);
 	}
 
-	/* hmmm, still NULL ?*/
-	if(!db->pkgcache) {
-		_alpm_log(db->handle, PM_LOG_DEBUG, "warning: pkgcache is NULL for db '%s'\n", db->treename);
-	}
-
 	return db->pkgcache;
 }
 
diff --git a/lib/libalpm/db.h b/lib/libalpm/db.h
index c5fcd5f0..4541c258 100644
--- a/lib/libalpm/db.h
+++ b/lib/libalpm/db.h
@@ -46,7 +46,6 @@ typedef enum _pmdbinfrq_t {
 struct db_operations {
 	int (*populate) (pmdb_t *);
 	void (*unregister) (pmdb_t *);
-	int (*version) (pmdb_t *);
 };
 
 /* Database */
diff --git a/lib/libalpm/trans.c b/lib/libalpm/trans.c
index f0744937..b4bdccfb 100644
--- a/lib/libalpm/trans.c
+++ b/lib/libalpm/trans.c
@@ -101,8 +101,6 @@ int SYMEXPORT alpm_trans_init(pmhandle_t *handle, pmtransflag_t flags,
 		alpm_trans_cb_progress progress)
 {
 	pmtrans_t *trans;
-	const int required_db_version = 2;
-	int db_version;
 
 	/* Sanity checks */
 	CHECK_HANDLE(handle, return -1);
@@ -122,16 +120,6 @@ int SYMEXPORT alpm_trans_init(pmhandle_t *handle, pmtransflag_t flags,
 	trans->cb_progress = progress;
 	trans->state = STATE_INITIALIZED;
 
-	/* check database version */
-	db_version = _alpm_db_version(handle->db_local);
-	if(db_version < required_db_version) {
-		_alpm_log(handle, PM_LOG_ERROR,
-				_("%s database version is too old\n"), handle->db_local->treename);
-		remove_lock(handle);
-		_alpm_trans_free(trans);
-		RET_ERR(handle, PM_ERR_DB_VERSION, -1);
-	}
-
 	handle->trans = trans;
 
 	return 0;