[LTP] [PATCH 2/2] syscalls/read04: Convert to new API

[Shiyang Ruan]

Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>
---
 testcases/kernel/syscalls/read/read04.c | 157 +++++-------------------
 1 file changed, 34 insertions(+), 123 deletions(-)

diff --git a/testcases/kernel/syscalls/read/read04.c b/testcases/kernel/syscalls/read/read04.c
index 11469ad29..6a9ed218b 100644
--- a/testcases/kernel/syscalls/read/read04.c
+++ b/testcases/kernel/syscalls/read/read04.c
@@ -1,150 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
- *
- *   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
+ * Copyright (c) International Business Machines  Corp., 2001
  */
 
-/*
- * NAME
- *	read04.c
- *
- * DESCRIPTION
- *	Testcase to check if read returns the number of bytes read correctly.
- *
- * ALGORITHM
- *	Create a file and write some bytes out to it.
- *	Attempt to read more than written.
- *	Check the return count, and the read buffer. The read buffer should be
- *	same as the write buffer.
- *
- * USAGE:  <for command-line>
- *  read04 [-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
- *	07/2001 Ported by Wayne Boyer
+/*\
+ * [DESCRIPTION]
  *
- * RESTRICTIONS
- *	None
+ * Testcase to check if read() returns the number of bytes read correctly.
  */
+
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <stdio.h>
 #include <fcntl.h>
-#include <errno.h>
-#include "test.h"
-#include "safe_macros.h"
-
-void cleanup(void);
-void setup(void);
-
-char *TCID = "read04";
-int TST_TOTAL = 1;
+#include "tst_test.h"
 
 #define TST_SIZE	27	/* could also do strlen(palfa) */
-char fname[255];
-char palfa[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
-int fild;
+static char fname[255];
+static char palfa[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
 
-int main(int ac, char **av)
+static void verify_read(void)
 {
-	int lc;
-
-	int rfild;
+	int fd;
 	char prbuf[BUFSIZ];
 
-	/*
-	 * parse standard options
-	 */
-	tst_parse_opts(ac, av, NULL, NULL);
-
-	setup();		/* global setup for test */
-
-	for (lc = 0; TEST_LOOPING(lc); lc++) {
-
-		tst_count = 0;	/* reset tst_count while looping */
-
-		if ((rfild = open(fname, O_RDONLY)) == -1) {
-			tst_brkm(TBROK, cleanup, "can't open for reading");
-		}
-		TEST(read(rfild, prbuf, BUFSIZ));
+	fd = SAFE_OPEN(fname, O_RDONLY);
+	TEST(read(fd, prbuf, BUFSIZ));
 
-		if (TEST_RETURN == -1) {
-			tst_resm(TFAIL, "call failed unexpectedly");
-			continue;
-		}
-
-		if (TEST_RETURN != TST_SIZE) {
-			tst_resm(TFAIL, "Bad read count - got %ld - "
-				 "expected %d", TEST_RETURN, TST_SIZE);
-			continue;
-		}
-		if (memcmp(palfa, prbuf, TST_SIZE) != 0) {
-			tst_resm(TFAIL, "read buffer not equal "
-				 "to write buffer");
-			continue;
-		}
-		tst_resm(TPASS, "functionality of read() is correct");
-
-		SAFE_CLOSE(cleanup, rfild);
+	if (TST_RET != TST_SIZE) {
+		tst_res(TFAIL, "Bad read count - got %ld - expected %d",
+				TST_RET, TST_SIZE);
+		goto out;
+	}
+	if (memcmp(palfa, prbuf, TST_SIZE)) {
+		tst_res(TFAIL, "read buffer not equal to write buffer");
+		goto out;
 	}
+	tst_res(TPASS, "functionality of read() is correct");
 
-	cleanup();
-	tst_exit();
+out:
+	SAFE_CLOSE(fd);
 }
 
-/*
- * setup() - performs all ONE TIME setup for this test
- */
-void setup(void)
+static void setup(void)
 {
-
-	tst_sig(NOFORK, DEF_HANDLER, cleanup);
+	int fd;
 
 	umask(0);
-
-	TEST_PAUSE;
-
-	tst_tmpdir();
-
 	sprintf(fname, "tfile_%d", getpid());
 
-	if ((fild = creat(fname, 0777)) == -1) {
-		tst_brkm(TBROK, cleanup, "creat(%s, 0777) Failed, errno = %d"
-			 " : %s", fname, errno, strerror(errno));
-	}
-	if (write(fild, palfa, TST_SIZE) != TST_SIZE) {
-		tst_brkm(TBROK, cleanup, "can't write to Xread");
-	}
-	close(fild);
+	fd = SAFE_CREAT(fname, 0777);
+	SAFE_WRITE(1, fd, palfa, TST_SIZE);
+	SAFE_CLOSE(fd);
 }
 
-/*
- * cleanup() - performs all ONE TIME cleanup for this test at completion or
- *	       premature exit.
- */
-void cleanup(void)
-{
-
-	unlink(fname);
-	tst_rmdir();
-
-}
+static struct tst_test test = {
+	.needs_tmpdir = 1,
+	.setup = setup,
+	.test_all = verify_read,
+};
-- 
2.31.1