[LTP] [PATCH v2 1/3] fchownat01: Convert to new API

[Shiyang Ruan]

1. convert to new API
2. move error tests to fchownat03
3. check if uid/gid is correctly set

---
V1: https://lore.kernel.org/ltp/20240126062540.2596279-1-ruansy.fnst@fujitsu.com/T/#u

Changes:
 * Move error tests from fchownat01 to fchownat03
 * fchownat01: Add check if file's ownership changed successfully
 * fchownat02: Use AT_FDCWD instead of dir_fd

Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>
---
 .../kernel/syscalls/fchownat/fchownat01.c     | 160 ++++++------------
 1 file changed, 50 insertions(+), 110 deletions(-)

diff --git a/testcases/kernel/syscalls/fchownat/fchownat01.c b/testcases/kernel/syscalls/fchownat/fchownat01.c
index 7771c111a..6768fdd77 100644
--- a/testcases/kernel/syscalls/fchownat/fchownat01.c
+++ b/testcases/kernel/syscalls/fchownat/fchownat01.c
@@ -1,133 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
- *   Copyright (c) International Business Machines  Corp., 2006
- *   AUTHOR: Yi Yang <yyangcdl@cn.ibm.com>
- *
- *   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., 2006
+ * Copyright (c) Linux Test Project, 2007-2025
  */
-/*
- * DESCRIPTION
- *	This test case will verify basic function of fchownat
- *	added by kernel 2.6.16 or up.
+
+/*\
+ * [Description]
+ *
+ * Verify basic function of fchownat() added by kernel 2.6.16 or up.
  */
 
 #define _GNU_SOURCE
+#include "tst_test.h"
 
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <string.h>
-#include <signal.h>
-
-#include "test.h"
-#include "safe_macros.h"
-#include "lapi/fcntl.h"
-
-#define TESTFILE	"testfile"
-
-static void setup(void);
-static void cleanup(void);
+#define TESTFILE1	"testfile1"
+#define TESTFILE2	"testfile2"
 
+static uid_t set_uid = 1000;
+static gid_t set_gid = 1000;
 static int dir_fd;
-static int fd;
-static int no_fd = -1;
 static int cu_fd = AT_FDCWD;
 
-static struct test_case_t {
-	int exp_ret;
-	int exp_errno;
-	int flag;
-	int *fds;
-	char *filenames;
-} test_cases[] = {
-	{0, 0, 0, &dir_fd, TESTFILE},
-	{-1, ENOTDIR, 0, &fd, TESTFILE},
-	{-1, EBADF, 0, &no_fd, TESTFILE},
-	{-1, EINVAL, 9999, &dir_fd, TESTFILE},
-	{0, 0, 0, &cu_fd, TESTFILE},
+static struct tcase {
+	int *fd;
+	char *filename;
+} tcases[] = {
+	{ &dir_fd, TESTFILE1, },
+	{ &cu_fd, TESTFILE2, },
 };
 
-char *TCID = "fchownat01";
-int TST_TOTAL = ARRAY_SIZE(test_cases);
-static void fchownat_verify(const struct test_case_t *);
-
-int main(int ac, char **av)
+static void fchownat_verify(unsigned int n)
 {
-	int lc;
-	int i;
-
-	tst_parse_opts(ac, av, NULL, NULL);
-
-	setup();
-
-	for (lc = 0; TEST_LOOPING(lc); lc++) {
-		tst_count = 0;
-		for (i = 0; i < TST_TOTAL; i++)
-			fchownat_verify(&test_cases[i]);
-	}
-
-	cleanup();
-	tst_exit();
+	struct tcase *tc = &tcases[n];
+	struct stat stat_buf;
+	int fd = *tc->fd;
+	const char *filename = tc->filename;
+
+	TST_EXP_PASS_SILENT(fchownat(fd, filename, set_uid, set_gid, 0));
+
+	/* check if the file's ownership changed successfully */
+	SAFE_STAT(filename, &stat_buf);
+	if (stat_buf.st_uid == set_uid && stat_buf.st_gid == set_gid)
+		tst_res(TPASS, "fchownat(%d, %s, %d, %d, 0)",
+			fd, filename, set_uid, set_gid);
+	else
+		tst_res(TFAIL, "fchownat() fails because uid(%d) != set(%d) || "
+			"gid(%d) != set(%d)",
+			stat_buf.st_uid, set_uid,
+			stat_buf.st_gid, set_gid);
 }
 
 static void setup(void)
 {
-	tst_sig(NOFORK, DEF_HANDLER, cleanup);
-
-	TEST_PAUSE;
-
-	tst_tmpdir();
-
-	dir_fd = SAFE_OPEN(cleanup, "./", O_DIRECTORY);
-
-	SAFE_TOUCH(cleanup, TESTFILE, 0600, NULL);
-
-	fd = SAFE_OPEN(cleanup, "testfile2", O_CREAT | O_RDWR, 0600);
-}
-
-static void fchownat_verify(const struct test_case_t *test)
-{
-	TEST(fchownat(*(test->fds), test->filenames, geteuid(),
-		      getegid(), test->flag));
-
-	if (TEST_RETURN != test->exp_ret) {
-		tst_resm(TFAIL | TTERRNO,
-			 "fchownat() returned %ld, expected %d, errno=%d",
-			 TEST_RETURN, test->exp_ret, test->exp_errno);
-		return;
-	}
-
-	if (TEST_ERRNO == test->exp_errno) {
-		tst_resm(TPASS | TTERRNO,
-			 "fchownat() returned the expected errno %d: %s",
-			 test->exp_ret, strerror(test->exp_errno));
-	} else {
-		tst_resm(TFAIL | TTERRNO,
-			 "fchownat() failed unexpectedly; expected: %d - %s",
-			 test->exp_errno, strerror(test->exp_errno));
-	}
+	dir_fd = SAFE_OPEN("./", O_DIRECTORY);
+	SAFE_TOUCH(TESTFILE1, 0600, NULL);
+	SAFE_TOUCH(TESTFILE2, 0600, NULL);
 }
 
 static void cleanup(void)
 {
-	if (fd > 0)
-		close(fd);
-
 	if (dir_fd > 0)
-		close(dir_fd);
-
-	tst_rmdir();
+		SAFE_CLOSE(dir_fd);
 }
+
+static struct tst_test test = {
+	.needs_tmpdir = 1,
+	.needs_root = 1,
+	.test = fchownat_verify,
+	.tcnt = ARRAY_SIZE(tcases),
+	.setup = setup,
+	.cleanup = cleanup,
+};
-- 
2.43.0