[LTP] [PATCH v1] kernel/pty06: Skip test when TTY not available

[Richard Palethorpe]

Hello Bogdan,

blezhepekov <blezhepekov@suse.de> writes:

> On 2022-03-11 17:33, Cyril Hrubis wrote:
>> Hi!
>>> Since TTYs under test are hardcoded, they
>>> might not be available in some systems.
>> Is the system you are running the tests on completely without ttys?
>> 
>>> Signed-off-by: Bogdan Lezhepekov <blezhepekov@suse.de>
>>> ---
>>>  testcases/kernel/pty/pty06.c | 9 ++++++---
>>>  1 file changed, 6 insertions(+), 3 deletions(-)
>>> diff --git a/testcases/kernel/pty/pty06.c 
>>> b/testcases/kernel/pty/pty06.c
>>> index b621f584f..250c38f6b 100644
>>> --- a/testcases/kernel/pty/pty06.c
>>> +++ b/testcases/kernel/pty/pty06.c
>>> @@ -45,8 +45,6 @@ static struct tst_fzsync_pair fzp;
>>>  static void *open_close(void *unused)
>>>  {
>>> -	sprintf(tty_path_b, "/dev/tty%d", test_tty_port);
>>> -
>>>  	while (tst_fzsync_run_b(&fzp)) {
>>>  		tst_fzsync_start_race_b(&fzp);
>>>  		int fd = SAFE_OPEN(tty_path_b, O_RDWR);
>>> @@ -60,7 +58,6 @@ static void *open_close(void *unused)
>>>  static void do_test(void)
>>>  {
>>> -	sprintf(tty_path_a, "/dev/tty%d", test_tty_port + 1);
>>>  	int fd = SAFE_OPEN(tty_path_a, O_RDWR);
>>>  	tst_fzsync_pair_reset(&fzp, open_close);
>>> @@ -80,6 +77,12 @@ static void do_test(void)
>>>  static void setup(void)
>>>  {
>>> +	sprintf(tty_path_a, "/dev/tty%d", test_tty_port + 1);
>>> +	sprintf(tty_path_b, "/dev/tty%d", test_tty_port);
>>> +
>>> +	if (access(tty_path_a, F_OK) != 0 || access(tty_path_b, F_OK) != 0)
>>> +		tst_brk(TCONF, "TTY(s) under test not available in system");
>> There is no need for the != 0 could be simplified just to:
>> 	if (access(...) || access(...))
>> 		tst_brk(TCONF, ...);
>> 
>>>  	tst_fzsync_pair_init(&fzp);
>>>  }
>>> --
>>> 2.35.1
>>> 
>>> --
>>> Mailing list info: https://lists.linux.it/listinfo/ltp
>
> Hi Cyril,
>
> Sorry for the delayed reply. I see the test requires an emulated
> terminal (ttyX), whilst our system supports serial console only
> (ttySX).
>
> What would be your recommendation, does it make sense to switch to
> ttySX? I wasn't sure about it, so disabling seemed more logical.

No, I think this only applies to graphical VTs. I'm not sure if it is
possible to create one on a system without real graphics.

Unless someone has an answer to the above, I think it is enough for now
to address Cyril's access comments and post a V2.

>
> Thanks,
> Bogdan


-- 
Thank you,
Richard.