[LTP] [PATCH 2/5] syscalls/dup2/dup202: Convert dup202 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/dup202.c | 175 +++++++-----------------
>   1 file changed, 48 insertions(+), 127 deletions(-)
>
> diff --git a/testcases/kernel/syscalls/dup2/dup202.c b/testcases/kernel/syscalls/dup2/dup202.c
> index c87769fa9..16f8b2add 100644
> --- a/testcases/kernel/syscalls/dup2/dup202.c
> +++ b/testcases/kernel/syscalls/dup2/dup202.c
> @@ -1,65 +1,22 @@
> -/*
> - *
> - *   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
> - *	dup202.c
> + * Copyright (c) International Business Machines  Corp., 2001
>    *
> - * DESCRIPTION
> + * DESCRIPTION:
>    *	Is the access mode the same for both file descriptors?
>    *		0: read only ?	"0444"
>    *		1: write only ? "0222"
>    *		2: read/write ? "0666"
>    *
> - * ALGORITHM
> - *	Creat a file with each access mode; dup each file descriptor;
> - *	stat each file descriptor and compare modes of each pair
> - *
> - * USAGE:<for command-line>
> - *  dup202 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
> - *     where,  -c n : Run n copies concurrently.
> - *             -f   : Turn off functionality Testing.
> - *             -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
> + * HISTORY:
>    *	07/2001 Ported by Wayne Boyer
> - *
> - * RESTRICTIONS
> - *	None
>    */
>
> -#include<sys/types.h>
> -#include<sys/stat.h>
>   #include<errno.h>
> -#include<fcntl.h>
>   #include<stdio.h>
> -#include "test.h"
> -#include "safe_macros.h"
> -
> -char *TCID = "dup202";
> -int TST_TOTAL = 3;
> -
> -void setup(void);
> -void cleanup(void);
> +#include "tst_test.h"
> +#include "tst_safe_macros.h"
>
>   char testfile[40];
>   int fail;
> @@ -68,100 +25,64 @@ int newfd;
>   /* set these to a known index into our local file descriptor table */
>   int duprdo = 10, dupwro = 20, duprdwr = 30;
please use static prefix.
>
> -struct test_case_t {
> +static struct tcase {
>   	int *nfd;
>   	mode_t mode;
> -} TC[] = {
> +} tcases[]= {
>   	/* The first test creat(es) a file with mode 0444 */
These commets are useless because we have said it in the top commet.
> -	{
> -	&duprdo, (S_IRUSR | S_IRGRP | S_IROTH)},
> +	{&duprdo, (S_IRUSR | S_IRGRP | S_IROTH)},
>   	    /* The second test creat(es) a file with mode 0222 */
> -	{
> -	&dupwro, (S_IWUSR | S_IWGRP | S_IWOTH)},
> +	{&dupwro, (S_IWUSR | S_IWGRP | S_IWOTH)},
>   	    /* The third test creat(es) a file with mode 0666 */
> -	{
> -	&duprdwr,
> -		    (S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR | S_IWGRP | S_IWOTH)}
> +	{&duprdwr, (S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR | S_IWGRP | S_IWOTH)},
>   };
>
> -int main(int ac, char **av)
> +void setup(void)
>   {
> -	int lc;
> -	int i, ofd;
> -	struct stat oldbuf, newbuf;
> -
> -	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++) {
> -
> -			if ((ofd = creat(testfile, TC[i].mode)) == -1)
> -				tst_brkm(TBROK | TERRNO, cleanup,
> -					 "creat failed");
> -
> -			TEST(dup2(ofd, *TC[i].nfd));
> -
> -			if (TEST_RETURN == -1) {
> -				tst_resm(TFAIL | TTERRNO,
> -					 "call failed unexpectedly");
> -				continue;
> -			}
> +	(void)umask(0);
umask(0) is enough.
> +	sprintf(testfile, "dup202.%d", getpid());
> +}
>
> -			/* stat the original file */
> -			SAFE_FSTAT(cleanup, ofd,&oldbuf);
> +static void run(unsigned int i)
> +{
> +	int ofd;
> +	struct stat oldbuf, newbuf;
> +	struct tcase *tc = tcases + i;
>
> -			/* stat the duped file */
> -			SAFE_FSTAT(cleanup, *TC[i].nfd,&newbuf);
> +	ofd = creat(testfile, tc->mode);
> +	if (ofd == -1)
> +		tst_brk(TBROK | TERRNO, "creat failed");
>
> -			if (oldbuf.st_mode != newbuf.st_mode)
> -				tst_resm(TFAIL, "original and dup "
> -					 "modes do not match");
> -			else
> -				tst_resm(TPASS, "fstat shows new and "
> -					 "old modes are the same");
> +	TEST(dup2(ofd, *tc->nfd));
>
> -			/* remove the file so that we can use it again */
> -			if (close(*TC[i].nfd) == -1)
> -				perror("close failed");
> -			if (close(ofd) == -1)
> -				perror("close failed");
> -			if (unlink(testfile) == -1)
> -				perror("unlink failed");
> -		}
> +	if (TST_RET == -1) {
> +		tst_res(TFAIL | TTERRNO, "call failed unexpectedly");
> +		return;
>   	}
We can use SAFE_DUP2 here.

Best Regards
Yang Xu
>
> -	cleanup();
> -	tst_exit();
> -}
> -
> -/*
> - * setup() - performs all ONE TIME setup for this test.
> - */
> -void setup(void)
> -{
> -
> -	tst_sig(NOFORK, DEF_HANDLER, cleanup);
> +	/* stat the original file */
> +	SAFE_FSTAT(ofd,&oldbuf);
>
> -	TEST_PAUSE;
> +	/* stat the duped file */
> +	SAFE_FSTAT(*tc->nfd,&newbuf);
>
> -	tst_tmpdir();
> +	if (oldbuf.st_mode != newbuf.st_mode)
> +		tst_res(TFAIL, "original and dup modes do not match");
> +	else
> +		tst_res(TPASS, "fstat shows new and old modes are the same");
>
> -	(void)umask(0);
> -
> -	sprintf(testfile, "dup202.%d", getpid());
> +	/* remove the file so that we can use it again */
> +	if (close(*tc->nfd) == -1)
> +		perror("close failed");
> +	if (close(ofd) == -1)
> +		perror("close failed");
> +	if (unlink(testfile) == -1)
> +		perror("unlink failed");
>   }
>
> -/*
> - * cleanup() - performs all ONE TIME cleanup for this test at
> - *	       completion or premature exit.
> - */
> -void cleanup(void)
> -{
> -	tst_rmdir();
> -}
> +static struct tst_test test = {
> +	.needs_tmpdir = 1,
> +	.tcnt = ARRAY_SIZE(tcases),
> +	.test = run,
> +	.setup = setup,
> +};