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-rw-r--r--src/test/test-libmount.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/src/test/test-libmount.c b/src/test/test-libmount.c
new file mode 100644
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--- /dev/null
+++ b/src/test/test-libmount.c
@@ -0,0 +1,110 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "escape.h"
+#include "libmount-util.h"
+#include "tests.h"
+
+static void test_libmount_unescaping_one(
+ const char *title,
+ const char *string,
+ bool may_fail,
+ const char *expected_source,
+ const char *expected_target) {
+ /* A test for libmount really */
+ int r;
+
+ log_info("/* %s %s */", __func__, title);
+
+ _cleanup_(mnt_free_tablep) struct libmnt_table *table = NULL;
+ _cleanup_(mnt_free_iterp) struct libmnt_iter *iter = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+
+ f = fmemopen((char*) string, strlen(string), "r");
+ assert_se(f);
+
+ assert_se(libmount_parse(title, f, &table, &iter) >= 0);
+
+ struct libmnt_fs *fs;
+ const char *source, *target;
+ _cleanup_free_ char *x = NULL, *cs = NULL, *s = NULL, *ct = NULL, *t = NULL;
+
+ /* We allow this call and the checks below to fail in some cases. See the case definitions below. */
+
+ r = mnt_table_next_fs(table, iter, &fs);
+ if (r != 0 && may_fail) {
+ log_error_errno(r, "mnt_table_next_fs failed: %m");
+ return;
+ }
+ assert_se(r == 0);
+
+ assert_se(x = cescape(string));
+
+ assert_se(source = mnt_fs_get_source(fs));
+ assert_se(target = mnt_fs_get_target(fs));
+
+ assert_se(cs = cescape(source));
+ assert_se(ct = cescape(target));
+
+ assert_se(cunescape(source, UNESCAPE_RELAX, &s) >= 0);
+ assert_se(cunescape(target, UNESCAPE_RELAX, &t) >= 0);
+
+ log_info("from '%s'", x);
+ log_info("source: '%s'", source);
+ log_info("source: '%s'", cs);
+ log_info("source: '%s'", s);
+ log_info("expected: '%s'", strna(expected_source));
+ log_info("target: '%s'", target);
+ log_info("target: '%s'", ct);
+ log_info("target: '%s'", t);
+ log_info("expected: '%s'", strna(expected_target));
+
+ assert_se(may_fail || streq(source, expected_source));
+ assert_se(may_fail || streq(target, expected_target));
+
+ assert_se(mnt_table_next_fs(table, iter, &fs) == 1);
+}
+
+TEST(libmount_unescaping) {
+ test_libmount_unescaping_one(
+ "escaped space + utf8",
+ "729 38 0:59 / /tmp/„zupa\\040zębowa” rw,relatime shared:395 - tmpfs die\\040Brühe rw,seclabel",
+ false,
+ "die Brühe",
+ "/tmp/„zupa zębowa”"
+ );
+
+ test_libmount_unescaping_one(
+ "escaped newline",
+ "729 38 0:59 / /tmp/x\\012y rw,relatime shared:395 - tmpfs newline rw,seclabel",
+ false,
+ "newline",
+ "/tmp/x\ny"
+ );
+
+ /* The result of "mount -t tmpfs '' /tmp/emptysource".
+ * This will fail with libmount <= v2.33.
+ * See https://github.com/karelzak/util-linux/commit/18a52a5094.
+ */
+ test_libmount_unescaping_one(
+ "empty source",
+ "760 38 0:60 / /tmp/emptysource rw,relatime shared:410 - tmpfs rw,seclabel",
+ true,
+ "",
+ "/tmp/emptysource"
+ );
+
+ /* The kernel leaves \r as is.
+ * Also see https://github.com/karelzak/util-linux/issues/780.
+ */
+ test_libmount_unescaping_one(
+ "foo\\rbar",
+ "790 38 0:61 / /tmp/foo\rbar rw,relatime shared:425 - tmpfs tmpfs rw,seclabel",
+ true,
+ "tmpfs",
+ "/tmp/foo\rbar"
+ );
+}
+
+DEFINE_TEST_MAIN(LOG_DEBUG);