fix detection of (no)persistence option in read-only mode

thanks intrigeri for finding the bug and mika for suggesting a fix

diff --git a/components/0020-read-only b/components/0020-read-only
index a2c86ef..f56b8cf 100755 (executable)
--- a/components/0020-read-only
+++ b/components/0020-read-only
@@ -54,7 +54,7 @@ Read_only ()
                esac
        done
 
-       if grep -qe persistence /proc/cmdline
+       if grep -qw persistence /proc/cmdline
                then
                printf " * Persistence mode enabled, searching for persistency related devices to unlock\n" >/dev/console