[v2,2/6] Rewrite utime02.c using new LTP API

diff --git a/testcases/kernel/syscalls/utime/utime02.c b/testcases/kernel/syscalls/utime/utime02.c
index 14d5e18c9..a145370e1 100644
--- a/testcases/kernel/syscalls/utime/utime02.c
+++ b/testcases/kernel/syscalls/utime/utime02.c
@@ -1,238 +1,91 @@ 
+// 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
+ *		07/2001 ported by John George
+ *   Copyright (c) 2022 SUSE LLC Avinesh Kumar <avinesh.kumar@suse.com>
  */
 
-/*
- * Test Name: utime02
- *
- * Test Description:
- *  Verify that the system call utime() successfully sets the modification
- *  and access times of a file to the current time, under the following
- *  constraints,
- *	- The times argument is null.
- *	- The user ID of the process is not "root".
- *	- The file is owned by the user ID of the process.
- *
- * Expected Result:
- *  utime succeeds returning zero and sets the access and modification
- *  times of the file to the current time.
- *
- * Algorithm:
- *  Setup:
- *   Setup signal handling.
- *   Create temporary directory.
- *   Pause for SIGUSR1 if option specified.
- *
- *  Test:
- *   Loop if the proper options are given.
- *   Execute system call
- *   Check return code, if system call failed (return=-1)
- *	Log the errno and Issue a FAIL message.
- *   Otherwise,
- *	Verify the Functionality of system call
- *      if successful,
- *		Issue Functionality-Pass message.
- *      Otherwise,
- *		Issue Functionality-Fail message.
- *  Cleanup:
- *   Print errno log and/or timing stats if options given
- *   Delete the temporary directory created.
- *
- * Usage:  <for command-line>
- *	utime02 [-c n] [-e] [-f] [-i n] [-I x] [-p x] [-t]
- *	where,  -c n : Run n copies concurrently.
- *		-e   : Turn on errno logging.
- *		-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 John George
- *		-Ported
- *
- * Restrictions:
+/*\
+ * [Description]
  *
+ * Verify that the system call utime() successfully changes the last
+ * access and modification times of a file to the current time,
+ * under the following constraints:
+ * - The times argument is NULL.
+ * - The user ID of the process is not "root".
+ * - The file is owned by the user ID of the process.
  */
 
-#include <stdio.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <errno.h>
-#include <fcntl.h>
 #include <utime.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <signal.h>
 #include <pwd.h>
-#include <time.h>
-
-#include "test.h"
-#include "safe_macros.h"
 
-#define TEMP_FILE	"tmp_file"
-#define FILE_MODE	S_IRUSR | S_IRGRP | S_IROTH
+#include "tst_test.h"
+#include "tst_clocks.h"
 
-char *TCID = "utime02";
-int TST_TOTAL = 1;
-time_t curr_time;		/* current time in seconds */
-
-char nobody_uid[] = "nobody";
-struct passwd *ltpuser;
-
-void setup();			/* Main setup function of test */
-void cleanup();			/* cleanup function for the test */
-
-int main(int ac, char **av)
-{
-	struct stat stat_buf;	/* struct buffer to hold file info. */
-	int lc;
-	long type;
-	time_t modf_time, access_time;
-	time_t pres_time;	/* file modification/access/present time */
-
-	tst_parse_opts(ac, av, NULL, NULL);
-
-	setup();
-
-	switch ((type = tst_fs_type(cleanup, "."))) {
-	case TST_NFS_MAGIC:
-		if (tst_kvercmp(2, 6, 18) < 0)
-			tst_brkm(TCONF, cleanup, "Cannot do utime on a file"
-				" on %s filesystem before 2.6.18",
-				 tst_fs_type_name(type));
-		break;
-	case TST_V9FS_MAGIC:
-		tst_brkm(TCONF, cleanup,
-			 "Cannot do utime on a file on %s filesystem",
-			 tst_fs_type_name(type));
-		break;
-	}
+#define MNT_POINT	"mntpoint"
+#define TEMP_FILE	MNT_POINT"/tmp_file"
+#define FILE_MODE	0444
 
-	for (lc = 0; TEST_LOOPING(lc); lc++) {
-
-		tst_count = 0;
-
-		/*
-		 * Invoke utime(2) to set TEMP_FILE access and
-		 * modification times to the current time.
-		 */
-		TEST(utime(TEMP_FILE, NULL));
-
-		if (TEST_RETURN == -1) {
-			tst_resm(TFAIL|TTERRNO, "utime(%s) failed", TEMP_FILE);
-		} else {
-			/*
-			 * Sleep for a second so that mod time and
-			 * access times will be different from the
-			 * current time
-			 */
-			sleep(2);
-
-			/*
-			 * Get the current time now, after calling
-			 * utime(2)
-			 */
-			pres_time = time(NULL);
-
-			/*
-			 * Get the modification and access times of
-			 * temporary file using stat(2).
-			 */
-			SAFE_STAT(cleanup, TEMP_FILE, &stat_buf);
-			modf_time = stat_buf.st_mtime;
-			access_time = stat_buf.st_atime;
-
-			/* Now do the actual verification */
-			if (modf_time <= curr_time ||
-			    modf_time >= pres_time ||
-			    access_time <= curr_time ||
-			    access_time >= pres_time) {
-				tst_resm(TFAIL, "%s access and "
-					 "modification times not set",
-					 TEMP_FILE);
-			} else {
-				tst_resm(TPASS, "Functionality of "
-					 "utime(%s, NULL) successful",
-					 TEMP_FILE);
-			}
-		}
-		tst_count++;
-	}
+#define TEST_USERNAME "nobody"
 
-	cleanup();
-	tst_exit();
-}
 
-/*
- * void
- * setup() - performs all ONE TIME setup for this test.
- *  Create a temporary directory and change directory to it.
- *  Create a test file under temporary directory and close it
- */
-void setup(void)
+static void setup(void)
 {
-	int fildes;		/* file handle for temp file */
-
-	tst_require_root();
-
-	tst_sig(FORK, DEF_HANDLER, cleanup);
-
-	/* Switch to nobody user for correct error code collection */
-	ltpuser = SAFE_GETPWNAM(NULL, nobody_uid);
-	SAFE_SETUID(NULL, ltpuser->pw_uid);
-
-	/* Pause if that option was specified
-	 * TEST_PAUSE contains the code to fork the test with the -i option.
-	 * You want to make sure you do this before you create your temporary
-	 * directory.
-	 */
-	TEST_PAUSE;
+	struct passwd *pw;
 
-	tst_tmpdir();
+	pw = SAFE_GETPWNAM(TEST_USERNAME);
 
-	/* Creat a temporary file under above directory */
-	fildes = SAFE_CREAT(cleanup, TEMP_FILE, FILE_MODE);
+	SAFE_TOUCH(TEMP_FILE, FILE_MODE, NULL);
+	SAFE_CHOWN(TEMP_FILE, pw->pw_uid, pw->pw_gid);
 
-	/* Close the temporary file created */
-	SAFE_CLOSE(cleanup, fildes);
-
-	/* Get the current time */
-	curr_time = time(NULL);
-
-	/*
-	 * Sleep for a second so that mod time and access times will be
-	 * different from the current time
-	 */
-	sleep(2);		/* sleep(1) on IA64 sometimes sleeps < 1 sec!! */
+	tst_res(TINFO, "Switching effective user ID to user: %s", pw->pw_name);
 
+	SAFE_SETEUID(pw->pw_uid);
 }
 
-/*
- * void
- * cleanup() - performs all ONE TIME cleanup for this test at
- *             completion or premature exit.
- *  Remove the test directory and testfile created in the setup.
- */
-void cleanup(void)
+static void run(void)
 {
-
-	tst_rmdir();
-
+	struct utimbuf utbuf;
+	struct stat stat_buf;
+	time_t pre_time, post_time;
+
+	utbuf.modtime = tst_get_fs_timestamp() - 5;
+	utbuf.actime = utbuf.modtime + 1;
+	TST_EXP_PASS_SILENT(utime(TEMP_FILE, &utbuf));
+	SAFE_STAT(TEMP_FILE, &stat_buf);
+
+	TST_EXP_EQ_LI(stat_buf.st_atime, utbuf.actime);
+	TST_EXP_EQ_LI(stat_buf.st_mtime, utbuf.modtime);
+
+	pre_time = tst_get_fs_timestamp();
+	TST_EXP_PASS(utime(TEMP_FILE, NULL), "utime(%s, NULL)", TEMP_FILE);
+	if (!TST_PASS)
+		return;
+	post_time = tst_get_fs_timestamp();
+	SAFE_STAT(TEMP_FILE, &stat_buf);
+
+	if (stat_buf.st_mtime < pre_time || stat_buf.st_mtime > post_time)
+		tst_res(TFAIL, "utime() did not set expected mtime, "
+				"pre_time: %ld, post_time: %ld, st_mtime: %ld",
+				pre_time, post_time, stat_buf.st_mtime);
+
+	if (stat_buf.st_atime < pre_time || stat_buf.st_atime > post_time)
+		tst_res(TFAIL, "utime() did not set expected atime, "
+				"pre_time: %ld, post_time: %ld, st_atime: %ld",
+				pre_time, post_time, stat_buf.st_atime);
 }
+
+static struct tst_test test = {
+	.test_all = run,
+	.setup = setup,
+	.needs_root = 1,
+	.needs_tmpdir = 1,
+	.mntpoint = MNT_POINT,
+	.mount_device = 1,
+	.all_filesystems = 1,
+	.skip_filesystems = (const char *const[]) {
+		"vfat",
+		"exfat",
+		NULL
+	}
+};