[PATCH] selftests: rtc: rtctest: Do not open-code TEST_HARNESS_MAIN

Kees Cook
2024-05-18T00:17:02Z

Argument processing is specific to the test harness code. Any optional
information needs to be passed via environment variables. Move alternate
path to the RTC_DEV environment variable. Also do not open-code
TEST_HARNESS_MAIN because its definition may change.

Additionally, setup checking can be done in the FIXTURE_SETUP(). With
this adjustment, also improve the error reporting when the device cannot
be opened.

Signed-off-by: Kees Cook <keescook@chromium.org>
---
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: linux-rtc@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
---
tools/testing/selftests/rtc/Makefile | 2 +-
tools/testing/selftests/rtc/rtctest.c | 66 +++++----------------------
2 files changed, 13 insertions(+), 55 deletions(-)

diff --git a/tools/testing/selftests/rtc/Makefile b/tools/testing/selftests/rtc/Makefile
index 55198ecc04db..654f9d58da3c 100644
--- a/tools/testing/selftests/rtc/Makefile
+++ b/tools/testing/selftests/rtc/Makefile
@@ -1,5 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
-CFLAGS += -O3 -Wl,-no-as-needed -Wall
+CFLAGS += -O3 -Wl,-no-as-needed -Wall $(KHDR_INCLUDES)
LDLIBS += -lrt -lpthread -lm

TEST_GEN_PROGS = rtctest
diff --git a/tools/testing/selftests/rtc/rtctest.c b/tools/testing/selftests/rtc/rtctest.c
index 63ce02d1d5cc..41cfefcc20e1 100644
--- a/tools/testing/selftests/rtc/rtctest.c
+++ b/tools/testing/selftests/rtc/rtctest.c
@@ -30,7 +30,18 @@ FIXTURE(rtc) {
};

FIXTURE_SETUP(rtc) {
+ char *alternate = getenv("RTC_DEV");
+
+ if (alternate)
+ rtc_file = alternate;
+
self->fd = open(rtc_file, O_RDONLY);
+
+ if (self->fd == -1 && errno == ENOENT)
+ SKIP(return, "Skipping test since %s does not exist", rtc_file);
+ EXPECT_NE(-1, self->fd) {
+ TH_LOG("%s: %s\n", rtc_file, strerror(errno));
+ }
}

FIXTURE_TEARDOWN(rtc) {
@@ -41,10 +52,6 @@ TEST_F(rtc, date_read) {
int rc;
struct rtc_time rtc_tm;

- if (self->fd == -1 && errno == ENOENT)
- SKIP(return, "Skipping test since %s does not exist", rtc_file);
- ASSERT_NE(-1, self->fd);
-
/* Read the RTC time/date */
rc = ioctl(self->fd, RTC_RD_TIME, &rtc_tm);
ASSERT_NE(-1, rc);
@@ -88,10 +95,6 @@ TEST_F_TIMEOUT(rtc, date_read_loop, READ_LOOP_DURATION_SEC + 2) {
struct rtc_time rtc_tm;
time_t start_rtc_read, prev_rtc_read;

- if (self->fd == -1 && errno == ENOENT)
- SKIP(return, "Skipping test since %s does not exist", rtc_file);
- ASSERT_NE(-1, self->fd);
-
TH_LOG("Continuously reading RTC time for %ds (with %dms breaks after every read).",
READ_LOOP_DURATION_SEC, READ_LOOP_SLEEP_MS);

@@ -126,10 +129,6 @@ TEST_F_TIMEOUT(rtc, uie_read, NUM_UIE + 2) {
int i, rc, irq = 0;
unsigned long data;

- if (self->fd == -1 && errno == ENOENT)
- SKIP(return, "Skipping test since %s does not exist", rtc_file);
- ASSERT_NE(-1, self->fd);
-
/* Turn on update interrupts */
rc = ioctl(self->fd, RTC_UIE_ON, 0);
if (rc == -1) {
@@ -155,10 +154,6 @@ TEST_F(rtc, uie_select) {
int i, rc, irq = 0;
unsigned long data;

- if (self->fd == -1 && errno == ENOENT)
- SKIP(return, "Skipping test since %s does not exist", rtc_file);
- ASSERT_NE(-1, self->fd);
-
/* Turn on update interrupts */
rc = ioctl(self->fd, RTC_UIE_ON, 0);
if (rc == -1) {
@@ -198,10 +193,6 @@ TEST_F(rtc, alarm_alm_set) {
time_t secs, new;
int rc;

- if (self->fd == -1 && errno == ENOENT)
- SKIP(return, "Skipping test since %s does not exist", rtc_file);
- ASSERT_NE(-1, self->fd);
-
rc = ioctl(self->fd, RTC_RD_TIME, &tm);
ASSERT_NE(-1, rc);

@@ -256,10 +247,6 @@ TEST_F(rtc, alarm_wkalm_set) {
time_t secs, new;
int rc;

- if (self->fd == -1 && errno == ENOENT)
- SKIP(return, "Skipping test since %s does not exist", rtc_file);
- ASSERT_NE(-1, self->fd);
-
rc = ioctl(self->fd, RTC_RD_TIME, &alarm.time);
ASSERT_NE(-1, rc);

@@ -308,10 +295,6 @@ TEST_F_TIMEOUT(rtc, alarm_alm_set_minute, 65) {
time_t secs, new;
int rc;

- if (self->fd == -1 && errno == ENOENT)
- SKIP(return, "Skipping test since %s does not exist", rtc_file);
- ASSERT_NE(-1, self->fd);
-
rc = ioctl(self->fd, RTC_RD_TIME, &tm);
ASSERT_NE(-1, rc);

@@ -366,10 +349,6 @@ TEST_F_TIMEOUT(rtc, alarm_wkalm_set_minute, 65) {
time_t secs, new;
int rc;

- if (self->fd == -1 && errno == ENOENT)
- SKIP(return, "Skipping test since %s does not exist", rtc_file);
- ASSERT_NE(-1, self->fd);
-
rc = ioctl(self->fd, RTC_RD_TIME, &alarm.time);
ASSERT_NE(-1, rc);

@@ -410,25 +389,4 @@ TEST_F_TIMEOUT(rtc, alarm_wkalm_set_minute, 65) {
ASSERT_EQ(new, secs);
}

-static void __attribute__((constructor))
-__constructor_order_last(void)
-{
- if (!__constructor_order)
- __constructor_order = _CONSTRUCTOR_ORDER_BACKWARD;
-}
-
-int main(int argc, char **argv)
-{
- switch (argc) {
- case 2:
- rtc_file = argv[1];
- /* FALLTHROUGH */
- case 1:
- break;
- default:
- fprintf(stderr, "usage: %s [rtcdev]\n", argv[0]);
- return 1;
- }
-
- return test_harness_run(argc, argv);
-}
+TEST_HARNESS_MAIN
--
2.34.1