Re: [PATCH v5] selftests: rtc: Fixes rtctest error handling.

[Shuah Khan <skhan@linuxfoundation.org>]

On 7/17/23 15:15, Alexandre Belloni wrote:
> On 17/07/2023 23:22:51+0530, Atul Kumar Pant wrote:
>> Adds a check to verify if the rtc device file is valid or not
>> and prints a useful error message if the file is not accessible.
>>
>> Signed-off-by: Atul Kumar Pant <atulpant.linux@gmail.com>
> 
> Please collect and keep the tags you got on previous versions
> 
>> ---
>>
>> changes since v4:
>>      Updated the commit message.
>>
>> changes since v3:
>>      Added Linux-kselftest and Linux-kernel mailing lists.
>>
>> changes since v2:
>>      Changed error message when rtc file does not exist.
>>
>> 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 63ce02d1d5cc..630fef735c7e 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
>> @@ -419,6 +420,8 @@ __constructor_order_last(void)
>>   
>>   int main(int argc, char **argv)
>>   {
>> +	int ret = -1;
>> +
>>   	switch (argc) {
>>   	case 2:
>>   		rtc_file = argv[1];
>> @@ -430,5 +433,11 @@ 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]: Cannot access rtc file %s - Exiting\n", rtc_file);

This should be skip not a fail. access() could for a number of reasons.
Since the test isn't run when access() returns error, this would be a
skip. Also the new message could be improved to use strerror() to
print message with details on why access() failed.
  
thanks,
-- Shuah