[LTP] [PATCH v2 1/2] syscalls/nice06: new test for nice()

[Richard Palethorpe]

Hello,

Zhao Gongyi via ltp <ltp@lists.linux.it> writes:

> 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.
>
> Signed-off-by: Zhao Gongyi <zhaogongyi@huawei.com>
> ---
>  runtest/syscalls                          |  1 +
>  testcases/kernel/syscalls/nice/.gitignore |  1 +
>  testcases/kernel/syscalls/nice/nice06.c   | 54 +++++++++++++++++++++++
>  3 files changed, 56 insertions(+)
>  create mode 100644 testcases/kernel/syscalls/nice/nice06.c
>
> diff --git a/runtest/syscalls b/runtest/syscalls
> index a52b93c92..557c946ec 100644
> --- a/runtest/syscalls
> +++ b/runtest/syscalls
> @@ -902,6 +902,7 @@ nice02 nice02
>  nice03 nice03
>  nice04 nice04
>  nice05 nice05
> +nice06 nice06

Ah I see you resubmitted nice05 with a new test name. Please see
my comments on V1.

>
>  open01 open01
>  open01A symlink01 -T open01
> diff --git a/testcases/kernel/syscalls/nice/.gitignore b/testcases/kernel/syscalls/nice/.gitignore
> index 58d64779e..c96064cdf 100644
> --- a/testcases/kernel/syscalls/nice/.gitignore
> +++ b/testcases/kernel/syscalls/nice/.gitignore
> @@ -3,3 +3,4 @@
>  /nice03
>  /nice04
>  /nice05
> +/nice06
> diff --git a/testcases/kernel/syscalls/nice/nice06.c b/testcases/kernel/syscalls/nice/nice06.c
> new file mode 100644
> index 000000000..92138f21e
> --- /dev/null
> +++ b/testcases/kernel/syscalls/nice/nice06.c
> @@ -0,0 +1,54 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Copyright(c) 2022 Huawei Technologies Co., Ltd
> + * Author: Zhao Gongyi <zhaogongyi@huawei.com>
> + */
> +
> +/*\
> + * [Description]
> + *
> + * 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.
> + */
> +#include <unistd.h>
> +#include "tst_test.h"
> +
> +#define	NICEINC -50
> +#define MIN_PRIO  -20
> +#define DEFAULT_PRIO 0
> +
> +static void verify_nice(void)
> +{
> +	int new_nice;
> +
> +	TEST(nice(NICEINC));
> +	if (TST_RET == -1) {
> +		tst_res(TFAIL | TTERRNO, "nice(%d) returned -1", NICEINC);
> +		return;
> +	}
> +
> +	if (TST_ERR) {
> +		tst_res(TFAIL | TTERRNO, "nice(%d) failed", NICEINC);
> +		return;
> +	}
> +
> +	new_nice = SAFE_GETPRIORITY(PRIO_PROCESS, 0);
> +
> +	if (new_nice != MIN_PRIO) {
> +		tst_res(TFAIL, "Process priority %i, expected %i",
> +			new_nice, MIN_PRIO);
> +		return;
> +	}
> +
> +	tst_res(TPASS, "nice(%d) passed", NICEINC);
> +
> +	TEST(nice(DEFAULT_PRIO));
> +	if (TST_ERR)
> +		tst_brk(TBROK | TTERRNO, "nice(%d) failed", DEFAULT_PRIO);
> +}
> +
> +static struct tst_test test = {
> +	.test_all = verify_nice,
> +	.needs_root = 1,
> +};
> --
> 2.17.1


-- 
Thank you,
Richard.