[LTP] [PATCH 5/5] setdomainname03: Convert to new API

[Petr Vorel <petr.vorel@gmail.com>]

Use _UTSNAME_LENGTH (65), which is defined in lapi/utsname.h
instead of __NEW_UTS_LEN (64).

Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
---
 .../syscalls/setdomainname/setdomainname03.c  | 195 +++---------------
 1 file changed, 32 insertions(+), 163 deletions(-)

diff --git a/testcases/kernel/syscalls/setdomainname/setdomainname03.c b/testcases/kernel/syscalls/setdomainname/setdomainname03.c
index 82793b878..e53ea8806 100644
--- a/testcases/kernel/syscalls/setdomainname/setdomainname03.c
+++ b/testcases/kernel/syscalls/setdomainname/setdomainname03.c
@@ -1,185 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
- * Copyright (c) Wipro Technologies Ltd, 2002.  All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * 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) Wipro Technologies Ltd, 2002. All Rights Reserved.
+ * Copyright (c) 2019 Petr Vorel <petr.vorel@gmail.com>
+ * Author: Saji Kumar.V.R <saji.kumar@wipro.com>
  */
-/**********************************************************
- *
- *    TEST IDENTIFIER   : setdomainname03
- *
- *    EXECUTED BY       : root / superuser
- *
- *    TEST TITLE        : test for EPERM error value when run as non superuser
- *
- *    TEST CASE TOTAL   : 1
- *
- *    AUTHOR            : Saji Kumar.V.R <saji.kumar@wipro.com>
- *
- *    SIGNALS
- *      Uses SIGUSR1 to pause before test if option set.
- *      (See the parse_opts(3) man page).
- *
- *    DESCRIPTION
- * 	Verify that, setdomainname(2) returns -1 and sets errno to EPERM
- * 	if the effective user id of the caller is not super-user.
- *
- * Algorithm:
- *  Setup:
- *   Setup signal handling.
- *   Pause for SIGUSR1 if option specified.
- *   save current domainname
- *   change effective user id to "nobody" user
- *
- *  Test:
- *   Loop if the proper options are given.
- *   Execute system call
- *   Check return code, Check return code, if (system call failed (return=-1)) &
- *			(errno set == expected errno)
- *   		Issue sys call fails with expected return value and errno.
- *   	Otherwise,
- *		Issue sys call fails with unexpected errno.
- *   Otherwise,
- *	Issue sys call returns unexpected value.
- *
- *  Cleanup:
- *   Change effective user id to root
- *   Restore old domainname
- *   Print errno log and/or timing stats if options given
- *
- * Usage:  <for command-line>
- *  setdomainname03 [-c n] [-e] [-i n] [-I x] [-P x] [-t] [-h] [-f] [-p]
- *	where,  -c n : Run n copies concurrently.
- *		-e   : Turn on errno logging.
- *		-h   : Show help screen
- *		-f   : Turn off functional testing
- *		-i n : Execute test n times.
- *		-I x : Execute test for x seconds.
- *		-p   : Pause for SIGUSR1 before starting
- *		-P x : Pause for x seconds between iterations.
- *		-t   : Turn on syscall timing.
- *
- ****************************************************************/
 
-#include <string.h>
 #include <errno.h>
 #include <pwd.h>
-#include <linux/utsname.h>
 
-#include "test.h"
+#include "setdomainname.h"
 
-#define MAX_NAME_LEN __NEW_UTS_LEN
-
-char *TCID = "setdomainname03";
-int TST_TOTAL = 1;
-
-static char nobody_uid[] = "nobody";
 struct passwd *ltpuser;
 
-static char test_domain_name[MAX_NAME_LEN] = "test_dom";
-static char old_domain_name[MAX_NAME_LEN];
-
-static void setup();		/* setup function for the tests */
-static void cleanup();		/* cleanup function for the tests */
-
-int main(int ac, char **av)
+static void do_test(void)
 {
-	int lc;
-
-	tst_parse_opts(ac, av, NULL, NULL);
-
-	/*
-	 * Invoke setup function to call individual test setup functions
-	 * for the test which run as root/super-user.
-	 */
-	setup();
-
-	for (lc = 0; TEST_LOOPING(lc); lc++) {
+	char *new = TST_VALID_DOMAIN_NAME;
 
-		tst_count = 0;
-
-		/*
-		 * Call setdomainname(2)
-		 */
-		TEST(setdomainname(test_domain_name, MAX_NAME_LEN));
-		if ((TEST_RETURN == -1) && (TEST_ERRNO == EPERM)) {
-			tst_resm(TPASS, "expected failure; Got EPERM");
-		} else {
-			tst_resm(TFAIL, "Call failed to produce "
-				 "expected error;  Expected errno: %d "
-				 "Got : %d, %s", EPERM, TEST_ERRNO,
-				 strerror(TEST_ERRNO));
-		}
+	TEST(do_setdomainname(new, sizeof(new)));
 
+	if (TST_RET != -1) {
+		tst_res(TFAIL, "unexpected exit code: %ld", TST_RET);
+		return;
 	}
 
-	/*
-	 * Invoke cleanup() to delete the test directories created
-	 * in the setup().
-	 */
-	cleanup();
-	tst_exit();
+	if (TST_ERR != EPERM) {
+		tst_res(TFAIL | TTERRNO, "unexpected errno: %d, expected: EPERM",
+			TST_ERR);
+		return;
+	}
 
+	tst_res(TPASS | TTERRNO, "expected failure");
 }
 
-/*
- * setup(void) - performs all ONE TIME setup for this test.
- */
-void setup(void)
+void setup_setuid(void)
 {
-	tst_require_root();
-
-	/* Capture unexpected signals */
-	tst_sig(NOFORK, DEF_HANDLER, cleanup);
-
-	/* Switch to nobody user for correct error code collection */
-	if ((ltpuser = getpwnam(nobody_uid)) == NULL) {
-		tst_brkm(TBROK, NULL, "\"nobody\" user not present");
-	}
-	if (seteuid(ltpuser->pw_uid) == -1) {
-		tst_resm(TWARN, "seteuid failed to "
-			 "to set the effective uid to %d", ltpuser->pw_uid);
-		perror("seteuid");
-	}
-
-	/* Save current domainname */
-	if ((getdomainname(old_domain_name, MAX_NAME_LEN)) < 0) {
-		tst_brkm(TBROK, NULL, "getdomainname() failed while"
-			 " getting current domain name");
-	}
-
-	TEST_PAUSE;
-
+	ltpuser = SAFE_GETPWNAM("nobody");
+	SAFE_SETEUID(ltpuser->pw_uid);
+	setup();
 }
 
-/*
- * cleanup() - Performs all ONE TIME cleanup for this test at
- */
-void cleanup(void)
+static void cleanup_setuid(void)
 {
-
-	/* Set effective user id back to root */
-	if (seteuid(0) == -1) {
-		tst_resm(TWARN, "seteuid failed to "
-			 "to set the effective uid to root");
-		perror("seteuid");
-	}
-
-	/* Restore domain name */
-	if ((setdomainname(old_domain_name, strlen(old_domain_name)))
-	    < 0) {
-		tst_resm(TWARN, "setdomainname() failed while restoring"
-			 " domainname to \"%s\"", old_domain_name);
-	}
-
+	SAFE_SETEUID(0);
+	cleanup();
 }
+
+static struct tst_test test = {
+	.needs_root = 1,
+	.setup = setup_setuid,
+	.cleanup = cleanup_setuid,
+	.test_all = do_test,
+	.test_variants = TEST_VARIANTS,
+};
-- 
2.20.1