[PATCH v2] selftests: rtc: Improves rtctest error handling.

[PATCH v2] selftests: rtc: Improves rtctest error handling.

[Atul Kumar Pant]

When running the rtctest if we pass wrong rtc device file as an argument
the test fails expectedly, but prints the logs that are not useful
to point out the issue.
To handle this, the patch adds a checks to verify if the rtc_file is valid.

Signed-off-by: Atul Kumar Pant <atulpant.linux@gmail.com>
---

changes since v1:
    Removed check for uid=0
    If rtc file is invalid, then exit the test.

 tools/testing/selftests/rtc/rtctest.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/rtc/rtctest.c b/tools/testing/selftests/rtc/rtctest.c
index 2b9d929a24ed..07f7dcd47102 100644
--- a/tools/testing/selftests/rtc/rtctest.c
+++ b/tools/testing/selftests/rtc/rtctest.c
@@ -17,6 +17,7 @@
 #include <unistd.h>
 
 #include "../kselftest_harness.h"
+#include "../kselftest.h"
 
 #define NUM_UIE 3
 #define ALARM_DELTA 3
@@ -388,6 +389,8 @@ __constructor_order_last(void)
 
 int main(int argc, char **argv)
 {
+	int ret = -1;
+
 	switch (argc) {
 	case 2:
 		rtc_file = argv[1];
@@ -399,5 +402,11 @@ int main(int argc, char **argv)
 		return 1;
 	}
 
-	return test_harness_run(argc, argv);
+	// Run the test if rtc_file is valid
+	if (access(rtc_file, F_OK) == 0)
+		ret = test_harness_run(argc, argv);
+	else
+		ksft_exit_fail_msg("[ERROR]: %s : File does not exists - Exiting\n", rtc_file);
+
+	return ret;
 }
-- 
2.25.1

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Re: [PATCH v2] selftests: rtc: Improves rtctest error handling.

[Alexandre Belloni via Linux-kernel-mentees]

On 29/04/2023 12:19:17+0530, Atul Kumar Pant wrote:
> When running the rtctest if we pass wrong rtc device file as an argument
> the test fails expectedly, but prints the logs that are not useful
> to point out the issue.
> To handle this, the patch adds a checks to verify if the rtc_file is valid.
> 
> Signed-off-by: Atul Kumar Pant <atulpant.linux@gmail.com>
> ---
> 
> changes since v1:
>     Removed check for uid=0
>     If rtc file is invalid, then exit the test.
> 
>  tools/testing/selftests/rtc/rtctest.c | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/rtc/rtctest.c b/tools/testing/selftests/rtc/rtctest.c
> index 2b9d929a24ed..07f7dcd47102 100644
> --- a/tools/testing/selftests/rtc/rtctest.c
> +++ b/tools/testing/selftests/rtc/rtctest.c
> @@ -17,6 +17,7 @@
>  #include <unistd.h>
>  
>  #include "../kselftest_harness.h"
> +#include "../kselftest.h"
>  
>  #define NUM_UIE 3
>  #define ALARM_DELTA 3
> @@ -388,6 +389,8 @@ __constructor_order_last(void)
>  
>  int main(int argc, char **argv)
>  {
> +	int ret = -1;
> +
>  	switch (argc) {
>  	case 2:
>  		rtc_file = argv[1];
> @@ -399,5 +402,11 @@ int main(int argc, char **argv)
>  		return 1;
>  	}
>  
> -	return test_harness_run(argc, argv);
> +	// Run the test if rtc_file is valid

if access to rtc_file is valid

> +	if (access(rtc_file, F_OK) == 0)
> +		ret = test_harness_run(argc, argv);
> +	else
> +		ksft_exit_fail_msg("[ERROR]: %s : File does not exists - Exiting\n", rtc_file);

It doesn't necessarily means the file does not exist but that you don't
have access to it.

> +
> +	return ret;
>  }
> -- 
> 2.25.1
> 

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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