[LTP] [PATCH v1] rt_sigpending02: reuse code from sigpending02

[Steve Muckle <smuckle@google.com>]

Hi Matthias,

On 03/08/2019 08:38 AM, 'Matthias Maennich' via kernel-team wrote:
> Rather than forking the code of sigpending02 completely, reuse its code
> for rt_sigpending02 by conditionally compiling the syscalls accordingly.
> 
> That way we ensure tests written for either rt_sigpending or sigpending
> are also considered for the respective other.
> 
> Signed-off-by: Matthias Maennich <maennich@google.com>

Cyril recently proposed a test multiplex function which hasn't yet gone in:

http://lists.linux.it/pipermail/ltp/2019-March/011119.html

This would remove the need for the custom Makefile bit.

One downside with this multiplexed approach is that we then don't have 
an entry in the testcases/kernel/syscalls/ directory for all syscalls 
which can cause some confusion, but that could perhaps be addressed by 
adding symlinks for the missing ones.

> ---
>   .../kernel/syscalls/rt_sigpending/Makefile    |  8 ++++
>   .../syscalls/rt_sigpending/rt_sigpending02.c  | 48 -------------------
>   testcases/kernel/syscalls/sigpending/Makefile |  2 +
>   .../kernel/syscalls/sigpending/sigpending02.c | 16 +++++--
>   4 files changed, 23 insertions(+), 51 deletions(-)
>   delete mode 100644 testcases/kernel/syscalls/rt_sigpending/rt_sigpending02.c
> 
> diff --git a/testcases/kernel/syscalls/rt_sigpending/Makefile b/testcases/kernel/syscalls/rt_sigpending/Makefile
> index 60c2e0140d85..57ba3dac2e41 100644
> --- a/testcases/kernel/syscalls/rt_sigpending/Makefile
> +++ b/testcases/kernel/syscalls/rt_sigpending/Makefile
> @@ -4,4 +4,12 @@
>   top_srcdir		?= ../../../..
>   
>   include $(top_srcdir)/include/mk/testcases.mk
> +
> +CPPFLAGS += -DTEST_RT_SIGPENDING
> +
> +rt_sigpending02: $(abs_srcdir)/../sigpending/sigpending02.c
> +	$(LINK.c) $^ $(LOADLIBES) $(LDLIBS) $(OUTPUT_OPTION)
> +
> +MAKE_TARGETS := rt_sigpending02
> +
>   include $(top_srcdir)/include/mk/generic_leaf_target.mk
> diff --git a/testcases/kernel/syscalls/rt_sigpending/rt_sigpending02.c b/testcases/kernel/syscalls/rt_sigpending/rt_sigpending02.c
> deleted file mode 100644
> index 06d1c1578f4d..000000000000
> --- a/testcases/kernel/syscalls/rt_sigpending/rt_sigpending02.c
> +++ /dev/null
> @@ -1,48 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0
> -/*
> - *  Copyright (c) International Business Machines  Corp., 2002
> - *
> - * AUTHORS
> - *	Paul Larson
> - *
> - * DESCRIPTION
> - *	Test to see that the proper errors are returned by rt_sigpending
> - *
> - *	Test 1:
> - *		Call rt_sigpending(sigset_t*=-1, SIGSETSIZE),
> - *		it should return -1 with errno EFAULT
> - */
> -
> -#include <errno.h>
> -#include <signal.h>
> -#include <sys/types.h>
> -
> -#include "tst_test.h"
> -#include "ltp_signal.h"
> -#include "lapi/syscalls.h"
> -
> -static void run(void)
> -{
> -	/* set sigset to point to an invalid location */
> -	sigset_t *sigset = (sigset_t *) - 1;
> -
> -	TEST(tst_syscall(__NR_rt_sigpending, sigset, SIGSETSIZE));
> -
> -	/* check return code */
> -	if (TST_RET == -1) {
> -		if (TST_ERR != EFAULT) {
> -			tst_res(TFAIL | TTERRNO,
> -				"rt_sigpending() Failed with wrong errno, "
> -				"expected errno=%d, got ", EFAULT);
> -		} else {
> -			tst_res(TPASS | TTERRNO, "expected failure");
> -		}
> -	} else {
> -		tst_res(TFAIL,
> -			"rt_sigpending() Failed, expected return value=-1, got %ld", TST_RET);
> -	}
> -}
> -
> -static struct tst_test test = {
> -	.test_all = run
> -};
> diff --git a/testcases/kernel/syscalls/sigpending/Makefile b/testcases/kernel/syscalls/sigpending/Makefile
> index bd617d806675..00a7d5e2b538 100644
> --- a/testcases/kernel/syscalls/sigpending/Makefile
> +++ b/testcases/kernel/syscalls/sigpending/Makefile
> @@ -20,4 +20,6 @@ top_srcdir		?= ../../../..
>   
>   include $(top_srcdir)/include/mk/testcases.mk
>   
> +CPPFLAGS += -DTEST_SIGPENDING
> +
>   include $(top_srcdir)/include/mk/generic_leaf_target.mk
> diff --git a/testcases/kernel/syscalls/sigpending/sigpending02.c b/testcases/kernel/syscalls/sigpending/sigpending02.c
> index e7ec0d6819bd..cc50870b107a 100644
> --- a/testcases/kernel/syscalls/sigpending/sigpending02.c
> +++ b/testcases/kernel/syscalls/sigpending/sigpending02.c
> @@ -6,7 +6,10 @@
>    *	Paul Larson
>    *
>    * DESCRIPTION
> - *	Test to see that the proper errors are returned by sigpending
> + *	Test to see that the proper errors are returned by sigpending. All the
> + *	tests can also be compiled to use the rt_sigpending syscall instead. To
> + *	simplify the documentation, only sigpending() is usually mentioned
> + *	below.
>    *
>    *	Test 1:
>    *		Call sigpending(sigset_t*=-1), it should return -1 with errno EFAULT
> @@ -17,6 +20,7 @@
>   #include <sys/types.h>
>   
>   #include "tst_test.h"
> +#include "ltp_signal.h"
>   #include "lapi/syscalls.h"
>   
>   static void run(void)
> @@ -24,20 +28,26 @@ static void run(void)
>   	/* set sigset to point to an invalid location */
>   	sigset_t *sigset = (sigset_t *) - 1;
>   
> +#if defined(TEST_SIGPENDING)
>   	TEST(tst_syscall(__NR_sigpending, sigset));
> +#elif defined(TEST_RT_SIGPENDING)
> +	TEST(tst_syscall(__NR_rt_sigpending, sigset, SIGSETSIZE));
> +#else
> +#error Neither TEST_SIGPENDING nor TEST_RT_SIGPENDING is defined!
> +#endif
>   
>   	/* check return code */
>   	if (TST_RET == -1) {
>   		if (TST_ERR != EFAULT) {
>   			tst_res(TFAIL | TTERRNO,
> -				"sigpending() Failed with wrong errno, "
> +				"syscall failed with wrong errno, "
>   				"expected errno=%d, got ", EFAULT);
>   		} else {
>   			tst_res(TPASS | TTERRNO, "expected failure");
>   		}
>   	} else {
>   		tst_res(TFAIL,
> -			"sigpending() Failed, expected return value=-1, got %ld", TST_RET);
> +			"syscall failed, expected return value=-1, got %ld", TST_RET);
>   	}
>   }
>   
>