Add simple selftests for fcntl(fd, F_CREATED, 0).
Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx>
---
tools/testing/selftests/core/close_range_test.c | 39 +++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/tools/testing/selftests/core/close_range_test.c b/tools/testing/selftests/core/close_range_test.c
index 991c473e3859..3cd50246ab64 100644
--- a/tools/testing/selftests/core/close_range_test.c
+++ b/tools/testing/selftests/core/close_range_test.c
@@ -26,6 +26,10 @@
#define F_DUPFD_QUERY (F_LINUX_SPECIFIC_BASE + 3)
#endif
+#ifndef F_CREATED
+#define F_CREATED (F_LINUX_SPECIFIC_BASE + 4)
+#endif
+
static inline int sys_close_range(unsigned int fd, unsigned int max_fd,
unsigned int flags)
{
@@ -589,4 +593,39 @@ TEST(close_range_cloexec_unshare_syzbot)
EXPECT_EQ(close(fd3), 0);
}
+TEST(fcntl_created)
+{
+ for (int i = 0; i < 101; i++) {
+ int fd;
+ char path[PATH_MAX];
+
+ fd = open("/dev/null", O_RDONLY | O_CLOEXEC);
+ ASSERT_GE(fd, 0) {
+ if (errno == ENOENT)
+ SKIP(return,
+ "Skipping test since /dev/null does not exist");
+ }
+
+ /* We didn't create "/dev/null". */
+ EXPECT_EQ(fcntl(fd, F_CREATED, 0), 0);
+ close(fd);
+
+ sprintf(path, "aaaa_%d", i);
+ fd = open(path, O_CREAT | O_RDONLY | O_CLOEXEC, 0600);
+ ASSERT_GE(fd, 0);
+
+ /* We created "aaaa_%d". */
+ EXPECT_EQ(fcntl(fd, F_CREATED, 0), 1);
+ close(fd);
+
+ fd = open(path, O_RDONLY | O_CLOEXEC);
+ ASSERT_GE(fd, 0);
+
+ /* We're opening it again, so no positive creation check. */
+ EXPECT_EQ(fcntl(fd, F_CREATED, 0), 0);
+ close(fd);
+ unlink(path);
+ }
+}
+
TEST_HARNESS_MAIN
--
2.43.0
