[v4,4/5] syscalls/clone06: Convert to new API

diff --git a/testcases/kernel/syscalls/clone/clone06.c b/testcases/kernel/syscalls/clone/clone06.c
index 99e7f3864..8337b5d90 100644
--- a/testcases/kernel/syscalls/clone/clone06.c
+++ b/testcases/kernel/syscalls/clone/clone06.c
@@ -1,140 +1,65 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) Wipro Technologies Ltd, 2002.  All Rights Reserved.
  * Copyright (c) 2012 Wanlong Gao <gaowanlong@cn.fujitsu.com>
- *
- * 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 the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
  */

-/*
- *	Test to verify inheritance of environment variables by child.
+/*\
+ * [Description]
+ * Test to verify inheritance of environment variables by child.
  */

-#if defined UCLINUX && !__THROW
-/* workaround for libc bug */
-#define __THROW
-#endif
-
-#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
 #include <sched.h>
-#include <sys/wait.h>
-#include <fcntl.h>
-#include "test.h"
+#include "tst_test.h"
 #include "clone_platform.h"

 #define MAX_LINE_LENGTH 256
+#define ENV_VAL "LTP test variable value"
+#define ENV_ID "LTP_CLONE_TEST"

-static void setup(void);
-static void cleanup(void);
-static int child_environ();
-
-static int pfd[2];
+static void *child_stack;

-char *TCID = "clone06";
-int TST_TOTAL = 1;
-
-int main(int ac, char **av)
+static int child_environ(void *arg LTP_ATTRIBUTE_UNUSED)
 {
-
-	int lc, status;
-	void *child_stack;
-	char *parent_env;
-	char buff[MAX_LINE_LENGTH];
-
-	tst_parse_opts(ac, av, NULL, NULL);
-
-	setup();
-
-	child_stack = malloc(CHILD_STACK_SIZE);
-	if (child_stack == NULL)
-		tst_brkm(TBROK, cleanup, "Cannot allocate stack for child");
-
-	for (lc = 0; TEST_LOOPING(lc); lc++) {
-		tst_count = 0;
-
-		if ((pipe(pfd)) == -1)
-			tst_brkm(TBROK | TERRNO, cleanup, "pipe() failed");
-
-		TEST(ltp_clone(SIGCHLD, child_environ, NULL, CHILD_STACK_SIZE,
-			       child_stack));
-
-		if (TEST_RETURN == -1)
-			tst_brkm(TFAIL | TTERRNO, cleanup, "clone failed");
-
-		/* close write end from parent */
-		if ((close(pfd[1])) == -1)
-			tst_resm(TWARN | TERRNO, "close(pfd[1]) failed");
-
-		/* Read env var from read end */
-		if ((read(pfd[0], buff, sizeof(buff))) == -1)
-			tst_brkm(TBROK | TERRNO, cleanup,
-				 "read from pipe failed");
-
-		/* Close read end from parent */
-		if ((close(pfd[0])) == -1)
-			tst_resm(TWARN | TERRNO, "close(pfd[0]) failed");
-
-		parent_env = getenv("TERM") ? : "";
-
-		if ((strcmp(buff, parent_env)) == 0)
-			tst_resm(TPASS, "Test Passed");
-		else
-			tst_resm(TFAIL, "Test Failed");
-
-		if ((wait(&status)) == -1)
-			tst_brkm(TBROK | TERRNO, cleanup,
-				 "wait failed, status: %d", status);
+	const char *env_val = getenv(ENV_ID);
+	if (!env_val) {
+		tst_res(TFAIL, "Variable " ENV_ID " not defined in child");
+		exit(-1);
 	}

-	free(child_stack);
+	if (strcmp(env_val, ENV_VAL)) {
+		tst_res(TFAIL, "Variable value is different");
+		exit(-1);
+	}
+
+	tst_res(TPASS, "The environment variables of the child and the parent are the same ");

-	cleanup();
-	tst_exit();
+	exit(0);
 }

-static void setup(void)
+static void verify_clone(void)
 {
-	tst_sig(FORK, DEF_HANDLER, cleanup);
-	TEST_PAUSE;
-}
+	TST_EXP_PID_SILENT(ltp_clone(SIGCHLD, child_environ, NULL, CHILD_STACK_SIZE,
+				child_stack));

-static void cleanup(void)
-{
+	if (!TST_PASS)
+		return;
+
+	tst_reap_children();
 }

-/*
- *	Function executed by child.
- *	Gets the value for environment variable,TERM &
- *	writes it to  a pipe.
- */
-static int child_environ(void)
+static void setup(void)
 {
-
-	char var[MAX_LINE_LENGTH];
-
-	/* Close read end from child */
-	if ((close(pfd[0])) == -1)
-		tst_brkm(TBROK | TERRNO, cleanup, "close(pfd[0]) failed");
-
-	if ((sprintf(var, "%s", getenv("TERM") ? : "")) < 0)
-		tst_resm(TWARN | TERRNO, "sprintf() failed");
-
-	if ((write(pfd[1], var, MAX_LINE_LENGTH)) == -1)
-		tst_resm(TWARN | TERRNO, "write to pipe failed");
-
-	/* Close write end of pipe from child */
-	if ((close(pfd[1])) == -1)
-		tst_resm(TWARN | TERRNO, "close(pfd[1]) failed");
-
-	exit(0);
+	SAFE_SETENV(ENV_ID, ENV_VAL, 0);
 }
+
+static struct tst_test test = {
+	.setup = setup,
+	.test_all = verify_clone,
+	.bufs = (struct tst_buffers []) {
+		{&child_stack, .size = CHILD_STACK_SIZE},
+		{},
+	},
+};