src/main.c (Init): chmod /ssd to YAFFS_ROOT_MODE to keep up with RTEMS changes

wpwrak · wpwrak · commit c1a99feeed38 · 2012-04-18T19:59:57.000-03:00
RTEMS now enforces permissions and RTEMS-YFFS got them wrong before,
making all M1 /ssd file systems created before this change de facto
inaccessible for Flickernoise.

With this commit, we change the permission to the YAFFS default (0777)
when mounting /ssd, transparently migrating all older installations.
diff --git a/src/main.c b/src/main.c
@@ -187,6 +187,16 @@ rtems_task Init(rtems_task_argument argument)
 	/*start_memcard();*/
 	mkdir("/ssd", 0777);
 	mount("/dev/flash5", "/ssd", "yaffs", RTEMS_FILESYSTEM_READ_WRITE, "");
+	/*
+	 * Older versions of RTEMS-YAFFS created the file system with the
+	 * (persistent) root inode set to 0666. RTEMS didn't check permissions
+	 * at that time but does now, causing most operations to fail (EACCES)
+	 * on file systems created before the transition.
+	 *
+	 * The "chmod" below transparently updates the permission of /ssd files
+	 * systems.
+	 */
+	chmod("/ssd", YAFFS_ROOT_MODE);
 	
 	init_version();
 	load_usb_firmware();
