[v4,2/2] semop04:Refactor with new API

diff --git a/testcases/kernel/syscalls/ipc/semop/semop04.c b/testcases/kernel/syscalls/ipc/semop/semop04.c
index 582624d60..589d9b0b4 100644
--- a/testcases/kernel/syscalls/ipc/semop/semop04.c
+++ b/testcases/kernel/syscalls/ipc/semop/semop04.c
@@ -1,36 +1,19 @@ 
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
+ * Copyright (c) International Business Machines  Corp., 2001
+ * Copyright (C) 2003-2023 Linux Test Project, Inc.
+ * Author: 2001 Paul Larson <plars@us.ibm.com>
+ * Modified: 2001 Manoj Iyer <manjo@ausin.ibm.com>
  *
- *   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
  */
 
-/*
- *  FILE        : sem01.c
- *  DESCRIPTION : Creates a semaphore and two processes.  The processes
- *                each go through a loop where they semdown, delay for a
- *                random amount of time, and semup, so they will almost
- *                always be fighting for control of the semaphore.
- *  HISTORY:
- *    01/15/2001 Paul Larson (plars@us.ibm.com)
- *      -written
- *    11/09/2001 Manoj Iyer (manjo@ausin.ibm.com)
- *    Modified.
- *    - Removed compiler warnings.
- *      added exit to the end of function main()
+/*\
+ * [Description]
  *
+ * Creates a semaphore and two processes.  The processes
+ * each go through a loop where they semdown, delay for a
+ * random amount of time, and semup, so they will almost
+ * always be fighting for control of the semaphore.
  */
 
 #include <unistd.h>
@@ -41,124 +24,94 @@ 
 #include <sys/wait.h>
 #include <sys/ipc.h>
 #include "lapi/sem.h"
+#include "tst_test.h"
+#include "tst_safe_sysv_ipc.h"
 
-int verbose = 0;
-int loops = 100;
-int errors = 0;
+static int loops = 100;
+static char *opt_loops_str;
 
-int semup(int semid)
+static void semup(int semid)
 {
 	struct sembuf semops;
+
 	semops.sem_num = 0;
 	semops.sem_op = 1;
 	semops.sem_flg = SEM_UNDO;
-	if (semop(semid, &semops, 1) == -1) {
-		perror("semup");
-		errors++;
-		return 1;
-	}
-	return 0;
+
+	SAFE_SEMOP(semid, &semops, 1);
 }
 
-int semdown(int semid)
+static void semdown(int semid)
 {
 	struct sembuf semops;
+
 	semops.sem_num = 0;
 	semops.sem_op = -1;
 	semops.sem_flg = SEM_UNDO;
-	if (semop(semid, &semops, 1) == -1) {
-		perror("semdown");
-		errors++;
-		return 1;
-	}
-	return 0;
+
+	SAFE_SEMOP(semid, &semops, 1);
 }
 
-void delayloop()
+static void delayloop(void)
 {
 	int delay;
+
 	delay = 1 + ((100.0 * rand()) / RAND_MAX);
-	if (verbose)
-		printf("in delay function for %d microseconds\n", delay);
 	usleep(delay);
 }
 
 void mainloop(int semid)
 {
 	int i;
+
 	for (i = 0; i < loops; i++) {
-		if (semdown(semid)) {
-			printf("semdown failed\n");
-		}
-		if (verbose)
-			printf("sem is down\n");
+		semdown(semid);
 		delayloop();
-		if (semup(semid)) {
-			printf("semup failed\n");
-		}
-		if (verbose)
-			printf("sem is up\n");
+		semup(semid);
 	}
 }
 
-int main(int argc, char *argv[])
+static void run(void)
 {
-	int semid, opt;
+	int semid;
 	union semun semunion;
-	extern char *optarg;
 	pid_t pid;
-	int chstat;
-
-	while ((opt = getopt(argc, argv, "l:vh")) != EOF) {
-		switch ((char)opt) {
-		case 'l':
-			loops = atoi(optarg);
-			break;
-		case 'v':
-			verbose = 1;
-			break;
-		case 'h':
-		default:
-			printf("Usage: -l loops [-v]\n");
-			exit(1);
-		}
-	}
 
 	/* set up the semaphore */
-	if ((semid = semget((key_t) 9142, 1, 0666 | IPC_CREAT)) < 0) {
-		printf("error in semget()\n");
-		exit(-1);
-	}
+	semid = SAFE_SEMGET((key_t) 9142, 1, 0666 | IPC_CREAT);
+
 	semunion.val = 1;
-	if (semctl(semid, 0, SETVAL, semunion) == -1) {
-		printf("error in semctl\n");
-	}
 
-	if ((pid = fork()) < 0) {
-		printf("fork error\n");
-		exit(-1);
-	}
+	SAFE_SEMCTL(semid, 0, SETVAL, semunion);
+
+	pid = SAFE_FORK();
+
 	if (pid) {
 		/* parent */
 		srand(pid);
 		mainloop(semid);
-		waitpid(pid, &chstat, 0);
-		if (!WIFEXITED(chstat)) {
-			printf("child exited with status\n");
-			exit(-1);
-		}
-		if (semctl(semid, 0, IPC_RMID, semunion) == -1) {
-			printf("error in semctl\n");
-		}
-		if (errors) {
-			printf("FAIL: there were %d errors\n", errors);
-		} else {
-			printf("PASS: error count is 0\n");
-		}
-		exit(errors);
+		tst_reap_children();
+		SAFE_SEMCTL(semid, 0, IPC_RMID, semunion);
+		tst_res(TPASS, "Semaphore up/down check success");
 	} else {
 		/* child */
 		mainloop(semid);
 	}
-	exit(0);
 }
+
+static void setup(void)
+{
+	if (opt_loops_str)
+		loops = SAFE_STRTOL(opt_loops_str, 1, INT_MAX);
+}
+
+static struct tst_test test = {
+	.test_all = run,
+	.setup = setup,
+	.forks_child = 1,
+	.options = (struct tst_option[]) {
+		{"l:", &opt_loops_str, "Internal loops for semup/down"},
+		{}
+	},
+	.needs_root = 1,
+};