[LTP] [PATCH] syscalls/fork03: Convert into new api

[Petr Vorel]

Hi Xu,

...
>  #include <sys/types.h>
nit: I don't think this is needed

> +#include <unistd.h>
>  #include <sys/wait.h>
> -#include <stdio.h>
> -#include "test.h"
...
> +#include <stdlib.h>
> +#include "tst_test.h"

...
> +	pid1 = SAFE_FORK();
> +	if (!pid1) {
> +		/* child uses some cpu time slices */
> +		for (i = 1; i < 32767; i++) {
> +			fl1 = 0.000001;
> +			fl1 = fl2 = 0.000001;
> +			fl1 = fl1 * 10.0;
> +			fl2 = fl1 / 1.232323;
> +			fl1 = fl2 - fl2;
> +			fl1 = fl2;
>  		}
> +		if (!pid1)
> +			exit(0);
> +		else
> +			exit(1);
nit: maybe just
exit(!!pid1);

Reviewed-by: Petr Vorel <pvorel@suse.cz>

I suggest further tiny space cleanups.

You can download it or use diff below.
https://github.com/pevik/ltp/raw/4788c24a97c2f0885a2da3a8930f27d2f15f93d3/testcases/kernel/syscalls/fork/fork03.c

Kind regards,
Petr

diff --git testcases/kernel/syscalls/fork/fork03.c testcases/kernel/syscalls/fork/fork03.c
index 072f12797..9f04c113b 100644
--- testcases/kernel/syscalls/fork/fork03.c
+++ testcases/kernel/syscalls/fork/fork03.c
@@ -1,20 +1,18 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright (c) International Business Machines Corp., 2001
- *
- * AUTHOR
- *      07/2001 Ported by Wayne Boyer
+ * Copyright (c) Linux Test Project, 2003-2023
+ * Author: 2001 Ported by Wayne Boyer
  */
 
 /*\
  *[Description]
  *
  * Check that child process can use a large text space and do a large number
- * of operations. In this situation, Check for pid == 0 in child and check
- * for pid > 0 in parent after wait.
+ * of operations. In this situation, check for PID == 0 in child and check
+ * for PID > 0 in parent after wait.
  */
 
-#include <sys/types.h>
 #include <unistd.h>
 #include <sys/wait.h>
 #include <stdlib.h>
@@ -36,22 +34,23 @@ static void verify_fork(void)
 			fl1 = fl2 - fl2;
 			fl1 = fl2;
 		}
-		if (!pid1)
-			exit(0);
-		else
-			exit(1);
+
+		exit(!!pid1);
 	}
 
-	tst_res(TINFO, "process id in parent of child from fork : %d", pid1);
+	tst_res(TINFO, "process id in parent of child from fork: %d", pid1);
 	pid2 = SAFE_WAIT(&status);
+
 	if (pid1 != pid2) {
-		tst_res(TFAIL, "pids don't match : %d vs %d", pid1, pid2);
+		tst_res(TFAIL, "pids don't match: %d vs %d", pid1, pid2);
 		return;
 	}
+
 	if ((status >> 8) != 0) {
 		tst_res(TFAIL, "child exited with failure");
 		return;
 	}
+
 	tst_res(TPASS, "test PASSED");
 }