@@ -9,7 +9,7 @@
#include <unistd.h>
#include <linux/limits.h>
-#include "../kselftest.h"
+#include "../kselftest_harness.h"
#define MIN_TTY_PATH_LEN 8
@@ -42,47 +42,42 @@ static int write_dev_tty(void)
return r;
}
-int main(int argc, char **argv)
+TEST(tty_tstamp_update)
{
int r;
char tty[PATH_MAX] = {};
struct stat st1, st2;
- ksft_print_header();
- ksft_set_plan(1);
+ ASSERT_GE(readlink("/proc/self/fd/0", tty, PATH_MAX), 0)
+ TH_LOG("readlink on /proc/self/fd/0 failed: %m");
- r = readlink("/proc/self/fd/0", tty, PATH_MAX);
- if (r < 0)
- ksft_exit_fail_msg("readlink on /proc/self/fd/0 failed: %m\n");
-
- if (!tty_valid(tty))
- ksft_exit_skip("invalid tty path '%s'\n", tty);
+ ASSERT_TRUE(tty_valid(tty)) {
+ TH_LOG("SKIP: invalid tty path '%s'", tty);
+ _exit(KSFT_SKIP);
+ }
- r = stat(tty, &st1);
- if (r < 0)
- ksft_exit_fail_msg("stat failed on tty path '%s': %m\n", tty);
+ ASSERT_GE(stat(tty, &st1), 0)
+ TH_LOG("stat failed on tty path '%s': %m", tty);
/* We need to wait at least 8 seconds in order to observe timestamp change */
/* https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fbf47635315ab308c9b58a1ea0906e711a9228de */
sleep(10);
r = write_dev_tty();
- if (r < 0)
- ksft_exit_fail_msg("failed to write to /dev/tty: %s\n",
- strerror(-r));
+ ASSERT_GE(r, 0)
+ TH_LOG("failed to write to /dev/tty: %s", strerror(-r));
- r = stat(tty, &st2);
- if (r < 0)
- ksft_exit_fail_msg("stat failed on tty path '%s': %m\n", tty);
+ ASSERT_GE(stat(tty, &st2), 0)
+ TH_LOG("stat failed on tty path '%s': %m", tty);
+
+ /* Validate unchanged atime under 'relatime' to ensure minimal disk I/O */
+ EXPECT_EQ(st1.st_atim.tv_sec, st2.st_atim.tv_sec);
/* We wrote to the terminal so timestamps should have been updated */
- if (st1.st_atim.tv_sec == st2.st_atim.tv_sec &&
- st1.st_mtim.tv_sec == st2.st_mtim.tv_sec) {
- ksft_test_result_fail("tty timestamps not updated\n");
- ksft_exit_fail();
- }
+ ASSERT_NE(st1.st_mtim.tv_sec, st2.st_mtim.tv_sec)
+ TH_LOG("tty timestamps not updated");
- ksft_test_result_pass(
- "timestamps of terminal '%s' updated after write to /dev/tty\n", tty);
- return EXIT_SUCCESS;
+ TH_LOG("timestamps of terminal '%s' updated after write to /dev/tty",
+ tty);
}
+TEST_HARNESS_MAIN
Use kselftest_harness.h to simplify the code structure by eliminating conditional logic. Enhance diagnostics by directly printing relevant info, such as access and modification times, upon test failure. Reflecting common I/O optimizations, the access time usually remains unchanged, while the modify time is expected to update. Accordingly, these elements have been logically separated. Signed-off-by: Shengyu Li <shengyu.li.evgeny@gmail.com> --- v3: Explain the need for refactoring v2: Fixed the last Assert --- .../testing/selftests/tty/tty_tstamp_update.c | 49 +++++++++---------- 1 file changed, 22 insertions(+), 27 deletions(-)