X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=udevdb.c;h=0f9de661a4916a4bbd92a862b0670a1064db6356;hb=1237229594bf02f63922e481462efe0dae4294e4;hp=5be3c2515126efb327d2276bbaddfbdb98963597;hpb=d546791d3ab1cbf8cb08b27eab1fc09e1c5d04dc;p=elogind.git

diff --git a/udevdb.c b/udevdb.c
index 5be3c2515..0f9de661a 100644
--- a/udevdb.c
+++ b/udevdb.c
@@ -62,29 +62,22 @@ int udevdb_add_dev(const char *path, const struct udevice *dev)
 	return tdb_store(udevdb, key, data, TDB_REPLACE); 
 }
 
-struct udevice *udevdb_get_dev(const char *path)
+int udevdb_get_dev(const char *path, struct udevice *dev)
 {
 	TDB_DATA key, data;
-	struct udevice *dev;
 
 	if (path == NULL)
-		return NULL;
+		return -ENODEV;
 
 	key.dptr = (void *)path;
 	key.dsize = strlen(path) + 1;
 
 	data = tdb_fetch(udevdb, key);
 	if (data.dptr == NULL || data.dsize == 0)
-		return NULL;
-
-	dev = malloc(sizeof(*dev));
-	if (dev == NULL)
-		goto exit;
+		return -ENODEV;
 
 	memcpy(dev, data.dptr, sizeof(*dev));
-exit:
-	free(data.dptr);
-	return dev;
+	return 0;
 }
 
 int udevdb_delete_dev(const char *path)
@@ -135,3 +128,16 @@ int udevdb_init(int init_flag)
 	}
 	return 0;
 }
+
+/**
+ * udevdb_init: open database for reading
+ */
+int udevdb_open_ro(void)
+{
+	udevdb = tdb_open(udev_db_filename, 0, 0, O_RDONLY, 0);
+	if (udevdb == NULL) {
+		dbg("unable to open database at '%s'", udev_db_filename);
+		return -EINVAL;
+	}
+	return 0;
+}