Support negated fstab options

We would ignore options like "fail" and "auto", and for any option
which takes a value the first assignment would win. Repeated and
options equivalent to the default are rarely used, but they have been
documented forever, and people might use them. Especially on the
kernel command line it is easier to append a repeated or negated
option at the end.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/test/test-fstab-util.c b/src/test/test-fstab-util.c
index ddf965dde5..284484d656 100644
--- a/src/test/test-fstab-util.c
+++ b/src/test/test-fstab-util.c
@@ -107,6 +107,15 @@ static void test_fstab_filter_options(void) {
         do_fstab_filter_options("", "opt\0", 0, NULL, NULL, "");
 }
 
+static void test_fstab_yes_no_option(void) {
+        assert_se(fstab_test_yes_no_option("nofail,fail,nofail", "nofail\0fail\0") == true);
+        assert_se(fstab_test_yes_no_option("nofail,nofail,fail", "nofail\0fail\0") == false);
+        assert_se(fstab_test_yes_no_option("abc,cde,afail", "nofail\0fail\0") == false);
+        assert_se(fstab_test_yes_no_option("nofail,fail=0,nofail=0", "nofail\0fail\0") == true);
+        assert_se(fstab_test_yes_no_option("nofail,nofail=0,fail=0", "nofail\0fail\0") == false);
+}
+
 int main(void) {
         test_fstab_filter_options();
+        test_fstab_yes_no_option();
 }