lib-sql: driver-sqlite - Support readonly databases

diff --git a/src/lib-sql/driver-sqlite.c b/src/lib-sql/driver-sqlite.c
index 79d386b02d3a0a34ad305a5e02cfc458014d499c..a448db356ef6aa702f94c694c31cf9dd9f7d3834 100644 (file)
--- a/src/lib-sql/driver-sqlite.c
+++ b/src/lib-sql/driver-sqlite.c
@@ -23,6 +23,7 @@ struct sqlite_db {
        sqlite3 *sqlite;
        bool connected:1;
        bool use_wal:1;
+       bool use_ro:1;
        int rc;
 };
 
@@ -51,10 +52,15 @@ static int driver_sqlite_connect(struct sql_db *_db)
 {
        struct sqlite_db *db = (struct sqlite_db *)_db;
        /* this is default for sqlite_open */
-       int flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE;
+       int flags;
 
        if (db->connected)
                return 1;
+       if (db->use_ro)
+               flags = SQLITE_OPEN_READONLY;
+       else
+               flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE;
+
        if (db->use_wal)
                flags |= SQLITE_OPEN_WAL;
 
@@ -87,6 +93,7 @@ static int driver_sqlite_parse_connect_string(struct sqlite_db *db,
 {
        const char *const *params = t_strsplit_spaces(connect_string, " ");
        const char *file = NULL;
+       bool val;
 
        if (str_array_length(params) < 1) {
                *error_r = "Empty connect_string";
@@ -105,6 +112,12 @@ static int driver_sqlite_parse_connect_string(struct sqlite_db *db,
                                                           "use either 'delete' or 'wal'", mode);
                                return -1;
                        }
+               } else if (str_begins(*params, "readonly=")) {
+                        if (settings_get_bool((*params)+9, &val, error_r) < 0) {
+                               *error_r = t_strdup_printf("readonly: %s", *error_r);
+                               return -1;
+                       }
+                       db->use_ro = val;
                } else if (strchr(*params, '=') != NULL) {
                        *error_r = t_strdup_printf("Unsupported parameter '%s'", *params);
                        return -1;