[LTP] [PATCH] syscalls/nice01: Add test nice(-1) and nice(-50)

[zhaogongyi]

Hi!

> Hello,
> 
> Zhao Gongyi via ltp <ltp@lists.linux.it> writes:
> 
> > 1. Add test verify that the errno is zero when callling of nice
> > legitimately return -1.(nice(-1), the default nice is usally 0) 2. Add
> > test verify that user of root can decrease the nice value of the
> > process successfully by passing a lower increment value (< min.
> > applicable limits) to nice() system call.(nice(-50))
> >
> > Signed-off-by: Zhao Gongyi <zhaogongyi@huawei.com>
> > ---
> >  testcases/kernel/syscalls/nice/nice01.c | 27
> > ++++++++++++++-----------
> >  1 file changed, 15 insertions(+), 12 deletions(-)
> >
> > diff --git a/testcases/kernel/syscalls/nice/nice01.c
> > b/testcases/kernel/syscalls/nice/nice01.c
> > index 876246180..bc022a265 100644
> > --- a/testcases/kernel/syscalls/nice/nice01.c
> > +++ b/testcases/kernel/syscalls/nice/nice01.c
> > @@ -17,29 +17,31 @@
> >  #include <sys/resource.h>
> >  #include "tst_test.h"
> >
> > -#define	NICEINC		-12
> > -#define MIN_PRIO	-20
> > +#define MIN_PRIO        -20
> >
> > -static void verify_nice(void)
> > +static int nice_inc[] = {-1, -12, -50};
> > +
> > +static void verify_nice(unsigned int i)
> >  {
> >  	int new_nice;
> >  	int orig_nice;
> >  	int exp_nice;
> > +	int inc = nice_inc[i];
> >
> >  	orig_nice = SAFE_GETPRIORITY(PRIO_PROCESS, 0);
> >
> > -	TEST(nice(NICEINC));
> > +	TEST(nice(inc));
> >
> > -	exp_nice = MAX(MIN_PRIO, (orig_nice + NICEINC));
> > +	exp_nice = MAX(MIN_PRIO, (orig_nice + inc));
> >
> >  	if (TST_RET != exp_nice) {
> >  		tst_res(TFAIL | TTERRNO, "nice(%d) returned %li, expected %i",
> > -			NICEINC, TST_RET, exp_nice);
> > +				inc, TST_RET, exp_nice);
> >  		return;
> >  	}
> >
> >  	if (TST_ERR) {
> > -		tst_res(TFAIL | TTERRNO, "nice(%d) failed", NICEINC);
> > +		tst_res(TFAIL | TTERRNO, "nice(%d) failed", inc);
> >  		return;
> >  	}
> >
> > @@ -47,18 +49,19 @@ static void verify_nice(void)
> >
> >  	if (new_nice != exp_nice) {
> >  		tst_res(TFAIL, "Process priority %i, expected %i",
> > -				new_nice, orig_nice + NICEINC);
> > +				new_nice, exp_nice);
> >  		return;
> >  	}
> >
> > -	tst_res(TPASS, "nice(%d) passed", NICEINC);
> > +	tst_res(TPASS, "nice(%d) passed", inc);
> >
> > -	TEST(nice(-NICEINC));
> > +	TEST(setpriority(PRIO_PROCESS, 0, orig_nice));
> 
> This is the nice test not the setpriority test (which also has a SAFE_ variant).
> 

Thanks, I have submit a v2 patch, please see: https://patchwork.ozlabs.org/project/ltp/patch/20221129081304.47000-1-zhaogongyi@huawei.com/

Regards,
Gongyi