--- bcache-tools-1.0.8.bcache-status.orig	2016-08-04 15:03:50.095602401 +0200

+++ bcache-tools-1.0.8/bcache-status	2016-08-04 14:31:24.507542579 +0200

@@ -337,8 +337,12 @@

 			continue

 		if run_gc:

-			with open('%s%s/internal/trigger_gc' % (SYSFS_BCACHE_PATH, cache), 'w') as fd:

-				fd.write('1\n')

+			try:

+				with open('%s%s/internal/trigger_gc' % (SYSFS_BCACHE_PATH, cache), 'w') as fd:

+					fd.write('1\n')

+			except PermissionError as e:

+				print ('You need root permissions for the --gc option')

+				sys.exit(1)

 		dump_bcache('%s%s' % (SYSFS_BCACHE_PATH, cache), stats, print_subdevices, uuid_map.get(cache, '?'))