[LTP] [PATCH 1/5] syscalls/dup2/dup201: Convert dup201 to the new API

[xuyang2018.jy@fujitsu.com <xuyang2018.jy@fujitsu.com>]

Hi Qi
> From: QI Fuli<qi.fuli@fujitsu.com>
>
> Signed-off-by: QI Fuli<qi.fuli@fujitsu.com>
> ---
>   testcases/kernel/syscalls/dup2/dup201.c | 161 +++++-------------------
>   1 file changed, 34 insertions(+), 127 deletions(-)
>
> diff --git a/testcases/kernel/syscalls/dup2/dup201.c b/testcases/kernel/syscalls/dup2/dup201.c
> index 4fa34466a..231c262bf 100644
> --- a/testcases/kernel/syscalls/dup2/dup201.c
> +++ b/testcases/kernel/syscalls/dup2/dup201.c
> @@ -1,87 +1,30 @@
> -/*
> - *
> - *   Copyright (c) International Business Machines  Corp., 2001
> - *
> - *   This program is free software;  you can redistribute it and/or modify
> - *   it under the terms of the GNU General Public License as published by
> - *   the Free Software Foundation; either version 2 of the License, or
> - *   (at your option) any later version.
> - *
> - *   This program is distributed in the hope that it will be useful,
> - *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
> - *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
> - *   the GNU General Public License for more details.
> - *
> - *   You should have received a copy of the GNU General Public License
> - *   along with this program;  if not, write to the Free Software
> - *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
> - */
> +// SPDX-License-Identifier: GPL-2.0-or-later
>
>   /*
> - * NAME
> - *	dup201.c
> + * Copyright (c) International Business Machines  Corp., 2001
>    *
> - * DESCRIPTION
> + * DESCRIPTION:
>    *	Negative tests for dup2() with bad fd (EBADF)
>    *
> - * ALGORITHM
> - * 	Setup:
> - *	a.	Setup signal handling.
> - *	b.	Pause for SIGUSR1 if option specified.
> - *
> - * 	Test:
> - *	a.	Loop if the proper options are given.
> - *	b.	Loop through the test cases
> - * 	c.	Execute dup2() system call
> - *	d.	Check return code, if system call failed (return=-1), test
> - *		for EBADF.
> - *
> - * 	Cleanup:
> - * 	a.	Print errno log and/or timing stats if options given
> - *
> - * USAGE:<for command-line>
> - *  dup201 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
> - *     where,  -c n : Run n copies concurrently.
> - *             -e   : Turn on errno logging.
> - *             -i n : Execute test n times.
> - *             -I x : Execute test for x seconds.
> - *             -P x : Pause for x seconds between iterations.
> - *             -t   : Turn on syscall timing.
> - *
> - * HISTORY
> - *	07/2001 Ported by Wayne Boyer
> - *	01/2002 Removed EMFILE test - Paul Larson
> - *
> - * RESTRICTIONS
> - * 	NONE
> + * HISTORY:
> + * 	07/2001 Ported by Wayne Boyer
> + * 	01/2002 Removed EMFILE test - Paul Larson
>    */
>
> -#include<sys/types.h>
> -#include<fcntl.h>
>   #include<errno.h>
> -#include<sys/time.h>
> -#include<sys/resource.h>
> -#include<unistd.h>
> -#include<signal.h>
> -#include "test.h"
> -
> -void setup(void);
> -void cleanup(void);
> -
> -char *TCID = "dup201";
> -int TST_TOTAL = 4;
> +#include "tst_test.h"
>
>   int maxfd;
>   int goodfd = 5;
>   int badfd = -1;
>   int mystdout = 0;
>
> -struct test_case_t {
> +static struct tcase {
>   	int *ofd;
>   	int *nfd;
>   	int error;
>   	void (*setupfunc) ();
> -} TC[] = {
> +} tcases[] = {
>   	/* First fd argument is less than 0 - EBADF */
I prefer to put these messages in the top commet, so we can see more 
useful information by using doc parse. Maybe as below:

/*\
  * [Description]
  *
  * Test for EBADF error.
  *
  * EBADF -  First fd argument is less than 0.
  * EBADF -  First fd argument is getdtablesize().
  * EBADF -  Second fd argument is less than 0.
  * EBADF -  Second fd argument is getdtablesize().
  */
>   	{&badfd,&goodfd, EBADF, NULL},
>   	    /* First fd argument is getdtablesize() - EBADF */
> @@ -92,72 +35,36 @@ struct test_case_t {
>   	{&mystdout,&maxfd, EBADF, NULL},
>   };
>
> -int main(int ac, char **av)
> -{
> -	int lc;
> -	int i;
> -
> -	tst_parse_opts(ac, av, NULL, NULL);
> -
> -	setup();
> -
> -	for (lc = 0; TEST_LOOPING(lc); lc++) {
> -
> -		tst_count = 0;
> -
> -		/* loop through the test cases */
> -
> -		for (i = 0; i<  TST_TOTAL; i++) {
> -
> -			/* call the test case setup routine if necessary */
> -			if (TC[i].setupfunc != NULL)
> -				(*TC[i].setupfunc) ();
> -
> -			TEST(dup2(*TC[i].ofd, *TC[i].nfd));
> -
> -			if (TEST_RETURN != -1) {
> -				tst_resm(TFAIL, "call succeeded unexpectedly");
> -				continue;
> -			}
> -
> -			if (TEST_ERRNO == TC[i].error) {
> -				tst_resm(TPASS,
> -					 "failed as expected - errno = %d : %s",
> -					 TEST_ERRNO, strerror(TEST_ERRNO));
> -			} else {
> -				tst_resm(TFAIL | TTERRNO,
> -					 "failed unexpectedly; "
> -					 "expected %d: %s", TC[i].error,
> -					 strerror(TC[i].error));
> -			}
> -		}
> -	}
> -	cleanup();
> -
> -	tst_exit();
> -}
> -
> -/*
> - * setup() - performs all ONE TIME setup for this test.
> - */
>   void setup(void)
>   {
> -
> -	tst_sig(NOFORK, DEF_HANDLER, cleanup);
> -
> -	TEST_PAUSE;
> -
> -	tst_tmpdir();
> -
>   	/* get some test specific values */
>   	maxfd = getdtablesize();
>   }
>
> -/*
> - * cleanup() - performs all ONE TIME cleanup for this test at
> - *	       completion or premature exit.
> - */
> -void cleanup(void)
> +static void run(unsigned int i)
>   {
> -	tst_rmdir();
> +	struct tcase *tc = tcases + i;
> +
> +	if (tc->setupfunc)
> +		tc->setupfunc();
> +
> +	TEST(dup2(*tc->ofd, *tc->nfd));
> +
> +	if (TST_RET == -1) {
> +		if (TST_ERR == tc->error)
If dup201 only tests EBADF error, I think we can use EBADF directly 
instead of tc->error.

Best Regards
Yang Xu
> +			tst_res(TPASS, "failed as expected - errno = %d : %s",
> +				TST_ERR, strerror(TST_ERR));
> +		else
> +			tst_res(TFAIL | TTERRNO, "failed unexpectedly; "
> +				"expected %d: %s", tc->error,
> +				strerror(tc->error));
> +	} else
> +		tst_res(TFAIL, "call succeeded unexpectedly");
>   }
> +
> +static struct tst_test test = {
> +	.needs_tmpdir = 1,
> +	.tcnt = ARRAY_SIZE(tcases),
> +	.test = run,
> +	.setup = setup,
> +};