[PATCH] more advanced user query options

[elogind.git] / udevdb.c

diff --git a/udevdb.c b/udevdb.c
index ca9e63c97e61d4376f0d9593b2c54b3a4b936bcf..8d077ea94fc766b652cdd0af705210867e23218f 100644 (file)
--- a/udevdb.c
+++ b/udevdb.c
@@ -124,7 +124,7 @@ int udevdb_init(int init_flag)
                        dbg("unable to initialize in-memory database");
                else
                        dbg("unable to initialize database at '%s'", udev_db_filename);
-               return -EINVAL;
+               return -EACCES;
        }
        return 0;
 }
@@ -137,7 +137,30 @@ 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 -EACCES;
+       }
+       return 0;
+}
+
+void (*user_record_callback) (char *path, struct udevice *dev);
+
+static int traverse_callback(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, void *state)
+{
+       user_record_callback((char*) key.dptr, (struct udevice*) dbuf.dptr);
+       return 0;
+}
+
+/**
+ * udevdb_dump: dumps whole database by passing record data to user function
+ * @user_record_handler: user function called for every record in the database
+ */
+int udevdb_dump(void (*user_record_handler) (char *path, struct udevice *dev))
+{
+       if (user_record_handler == NULL) {
+               dbg("invalid user record handling function");
                return -EINVAL;
        }
+       user_record_callback = user_record_handler;
+       tdb_traverse(udevdb, traverse_callback, NULL);
        return 0;
 }