Resguardo inicial

linux-7.2.3/tools/testing/selftests/filesystems/kernfs_test.c

@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0
+#define _GNU_SOURCE
+#define __SANE_USERSPACE_TYPES__
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <sys/xattr.h>
+
+#include "kselftest_harness.h"
+#include "wrappers.h"
+
+TEST(kernfs_listxattr)
+{
+	int fd;
+
+	/* Read-only file that can never have any extended attributes set. */
+	fd = open("/sys/kernel/warn_count", O_RDONLY | O_CLOEXEC);
+	ASSERT_GE(fd, 0);
+	ASSERT_EQ(flistxattr(fd, NULL, 0), 0);
+	EXPECT_EQ(close(fd), 0);
+}
+
+TEST(kernfs_getxattr)
+{
+	int fd;
+	char buf[1];
+
+	/* Read-only file that can never have any extended attributes set. */
+	fd = open("/sys/kernel/warn_count", O_RDONLY | O_CLOEXEC);
+	ASSERT_GE(fd, 0);
+	ASSERT_LT(fgetxattr(fd, "user.foo", buf, sizeof(buf)), 0);
+	ASSERT_EQ(errno, ENODATA);
+	EXPECT_EQ(close(fd), 0);
+}
+
+TEST_HARNESS_MAIN
+