[PATCH 2/3] selftests/nolibc: validate ENOTDIR return values from opendir()/fdopendir()
From: Thomas Weißschuh
Date: Mon Aug 31 2026 - 18:33:19 EST
Make sure that ENOTDIR is detected already during directory opening.
Signed-off-by: Thomas Weißschuh <linux@xxxxxxxxxxxxxx>
---
tools/testing/selftests/nolibc/nolibc-test.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c
index 0a8fe5100b7f..7091f63f3b25 100644
--- a/tools/testing/selftests/nolibc/nolibc-test.c
+++ b/tools/testing/selftests/nolibc/nolibc-test.c
@@ -1711,6 +1711,7 @@ int run_syscall(int min, int max)
CASE_TEST(execve_root); EXPECT_SYSER(1, execve("/", (char*[]){ [0] = (char []){"/"}, [1] = NULL }, NULL), -1, EACCES); break;
CASE_TEST(fchdir_stdin); EXPECT_SYSER(1, fchdir(STDIN_FILENO), -1, ENOTDIR); break;
CASE_TEST(fchdir_badfd); EXPECT_SYSER(1, fchdir(-1), -1, EBADF); break;
+ CASE_TEST(fdopendir_notdir); EXPECT_SYSER(1, (uintptr_t)fdopendir(STDIN_FILENO), (uintptr_t)NULL, ENOTDIR); break;
CASE_TEST(file_stream); EXPECT_SYSZR(1, test_file_stream()); break;
CASE_TEST(file_stream_wsr); EXPECT_SYSZR(1, test_file_stream_wsr()); break;
CASE_TEST(fork); EXPECT_SYSZR(1, test_fork(FORK_STANDARD)); break;
@@ -1739,6 +1740,7 @@ int run_syscall(int min, int max)
CASE_TEST(open_blah); EXPECT_SYSER(1, tmp = open("/proc/self/blah", O_RDONLY), -1, ENOENT); if (tmp != -1) close(tmp); break;
CASE_TEST(openat_dir); EXPECT_SYSZR(1, test_openat()); break;
CASE_TEST(open_mode); EXPECT_SYSZR(1, test_open_mode()); break;
+ CASE_TEST(opendir_notdir); EXPECT_SYSER(1, (uintptr_t)opendir("/dev/stdin"), (uintptr_t)NULL, ENOTDIR); break;
CASE_TEST(pipe); EXPECT_SYSZR(1, test_pipe()); break;
CASE_TEST(poll_null); EXPECT_SYSZR(1, poll(NULL, 0, 0)); break;
CASE_TEST(poll_stdout); EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break;
--
2.55.0