[v4,04/10] Rewrite sem_nstest.c using new LTP API

diff --git a/runtest/containers b/runtest/containers
index d863c10a4..4f56b1b4d 100644
--- a/runtest/containers
+++ b/runtest/containers
@@ -54,9 +54,9 @@  mesgq_nstest_none mesgq_nstest -m none
 mesgq_nstest_clone mesgq_nstest -m clone
 mesgq_nstest_unshare mesgq_nstest -m unshare
 msg_comm msg_comm
-sem_nstest_none sem_nstest none
-sem_nstest_clone sem_nstest clone
-sem_nstest_unshare sem_nstest unshare
+sem_nstest_none sem_nstest -m none
+sem_nstest_clone sem_nstest -m clone
+sem_nstest_unshare sem_nstest -m unshare
 semtest_2ns_none semtest_2ns none
 semtest_2ns_clone semtest_2ns clone
 semtest_2ns_unshare semtest_2ns unshare
diff --git a/testcases/kernel/containers/sysvipc/sem_nstest.c b/testcases/kernel/containers/sysvipc/sem_nstest.c
index 72e04fe4f..af4e87e8f 100644
--- a/testcases/kernel/containers/sysvipc/sem_nstest.c
+++ b/testcases/kernel/containers/sysvipc/sem_nstest.c
@@ -1,158 +1,96 @@ 
-/* *************************************************************************
-* Copyright (c) International Business Machines Corp., 2009
-* 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
-*
-* Author: Veerendra C <vechandr@in.ibm.com>
-*
-* In Parent Process , create semaphore with key 154326L
-* Now create container by passing 1 of the below flag values..
-*	clone(NONE), clone(CLONE_NEWIPC), or unshare(CLONE_NEWIPC)
-* In cloned process, try to access the created semaphore
-* Test PASS: If the semaphore is readable when flag is None.
-* Test FAIL: If the semaphore is readable when flag is Unshare or Clone.
-***************************************************************************/
-
-#define _GNU_SOURCE 1
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <sys/ipc.h>
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) International Business Machines Corp., 2009
+ *				Veerendra C <vechandr@in.ibm.com>
+ * Copyright (C) 2022 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Test SysV IPC semaphore usage between namespaces.
+ *
+ * [Algorithm]
+ *
+ * In parent process create a new semaphore with a specific key.
+ * In cloned process, try to access the created semaphore
+ *
+ * Test PASS if the semaphore is readable when flag is None.
+ * Test FAIL if the semaphore is readable when flag is Unshare or Clone.
+ */
+
+#define _GNU_SOURCE
+
+#include <sys/wait.h>
+#include <sys/msg.h>
+#include <sys/types.h>
 #include <sys/sem.h>
-#include <libclone.h>
-#include "test.h"
-#include "ipcns_helper.h"
+#include "tst_safe_sysv_ipc.h"
+#include "tst_test.h"
+#include "common.h"
 
-#define MY_KEY     154326L
-#define UNSHARESTR "unshare"
-#define CLONESTR   "clone"
-#define NONESTR    "none"
+#define MY_KEY 154326L
 
-char *TCID = "sem_nstest";
-int TST_TOTAL = 1;
-int p1[2];
-int p2[2];
+static char *str_op;
+static int use_clone;
+static int ipc_id = -1;
 
-int check_semaphore(void *vtest)
+static int check_semaphore(LTP_ATTRIBUTE_UNUSED void *vtest)
 {
-	char buf[3];
 	int id;
 
-	(void) vtest;
+	id = semget(MY_KEY, 1, 0);
 
-	close(p1[1]);
-	close(p2[0]);
+	if (id < 0) {
+		if (use_clone == T_NONE)
+			tst_res(TFAIL, "Plain cloned process didn't find semaphore");
+		else
+			tst_res(TPASS, "%s: container didn't find semaphore", str_op);
 
-	read(p1[0], buf, 3);
-	id = semget(MY_KEY, 1, 0);
-	if (id == -1)
-		write(p2[1], "notfnd", 7);
-	else {
-		write(p2[1], "exists", 7);
-		tst_resm(TINFO, "PID %d: Fetched existing semaphore..id = %d",
-			 getpid(), id);
+		return 0;
 	}
-	tst_exit();
+
+	tst_res(TINFO, "PID %d: fetched existing semaphore..id = %d", getpid(), id);
+
+	if (use_clone == T_NONE)
+		tst_res(TPASS, "Plain cloned process found semaphore inside container");
+	else
+		tst_res(TFAIL, "%s: Container init process found semaphore", str_op);
+
+	return 0;
 }
 
-static void setup(void)
+static void run(void)
 {
-	tst_require_root();
-	check_newipc();
+	clone_unshare_test(use_clone, CLONE_NEWIPC, check_semaphore, NULL);
 }
 
-int main(int argc, char *argv[])
+static void setup(void)
 {
-	int ret, use_clone = T_NONE, id;
-	char *tsttype = NONESTR;
-	char buf[7];
-
-	setup();
-
-	if (argc != 2) {
-		tst_resm(TFAIL, "Usage: %s <clone| unshare| none>", argv[0]);
-		tst_brkm(TFAIL, NULL, " where clone, unshare, or fork specifies"
-			 " unshare method.");
-	}
-
-	/* Using PIPE's to sync between container and Parent */
-	if (pipe(p1) == -1) {
-		perror("pipe");
-		exit(EXIT_FAILURE);
-	}
-	if (pipe(p2) == -1) {
-		perror("pipe");
-		exit(EXIT_FAILURE);
-	}
+	use_clone = get_clone_unshare_enum(str_op);
 
-	if (strcmp(argv[1], "clone") == 0) {
-		use_clone = T_CLONE;
-		tsttype = CLONESTR;
-	} else if (strcmp(argv[1], "unshare") == 0) {
-		use_clone = T_UNSHARE;
-		tsttype = UNSHARESTR;
-	}
-
-	/* 1. Create (or fetch if existing) the binary semaphore */
-	id = semget(MY_KEY, 1, IPC_CREAT | IPC_EXCL | 0666);
-	if (id == -1) {
-		perror("Semaphore create");
-		if (errno != EEXIST) {
-			perror("semget failure");
-			tst_brkm(TBROK, NULL, "Semaphore creation failed");
-		}
-		id = semget(MY_KEY, 1, 0);
-		if (id == -1) {
-			perror("Semaphore create");
-			tst_brkm(TBROK, NULL, "Semaphore operation failed");
-		}
-	}
-
-	tst_resm(TINFO, "Semaphore namespaces Isolation test : %s", tsttype);
-	/* fire off the test */
-	ret =
-	    do_clone_unshare_test(use_clone, CLONE_NEWIPC, check_semaphore,
-				  NULL);
-	if (ret < 0) {
-		tst_brkm(TFAIL, NULL, "%s failed", tsttype);
-	}
+	if (use_clone != T_NONE)
+		check_newipc();
 
-	close(p1[0]);
-	close(p2[1]);
-	write(p1[1], "go", 3);
-	read(p2[0], buf, 7);
+	ipc_id = SAFE_SEMGET(MY_KEY, 1, IPC_CREAT | IPC_EXCL | 0666);
+}
 
-	if (strcmp(buf, "exists") == 0) {
-		if (use_clone == T_NONE)
-			tst_resm(TPASS, "Plain cloned process found semaphore "
-				 "inside container");
-		else
-			tst_resm(TFAIL,
-				 "%s: Container init process found semaphore",
-				 tsttype);
-	} else {
-		if (use_clone == T_NONE)
-			tst_resm(TFAIL,
-				 "Plain cloned process didn't find semaphore");
-		else
-			tst_resm(TPASS, "%s: Container didn't find semaphore",
-				 tsttype);
+static void cleanup(void)
+{
+	if (ipc_id != -1) {
+		tst_res(TINFO, "Delete semaphore");
+		SAFE_SEMCTL(ipc_id, IPC_RMID, 0);
 	}
-
-	/* Delete the semaphore */
-	id = semget(MY_KEY, 1, 0);
-	semctl(id, IPC_RMID, 0);
-
-	tst_exit();
 }
+
+static struct tst_test test = {
+	.test_all = run,
+	.setup = setup,
+	.cleanup = cleanup,
+	.needs_root = 1,
+	.forks_child = 1,
+	.options = (struct tst_option[]) {
+		{ "m:", &str_op, "Test execution mode <clone|unshare|none>" },
+		{},
+	},
+};