1 /*
2  * Copyright (c) Wipro Technologies Ltd, 2002.  All Rights Reserved.
3  * Copyright (c) 2012 Wanlong Gao <gaowanlong@cn.fujitsu.com>
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms of version 2 of the GNU General Public License as
7  * published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope that it would be useful, but
10  * WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12  *
13  * You should have received a copy of the GNU General Public License along
14  * with this program; if not, write the Free Software Foundation, Inc.,
15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16  *
17  */
18 
19 /*
20  *	This is a test for the clone(2) system call.
21  *	It is intended to provide a limited exposure of the system call.
22  */
23 
24 #if defined UCLINUX && !__THROW
25 /* workaround for libc bug */
26 #define __THROW
27 #endif
28 
29 #include <errno.h>
30 #include <sched.h>
31 #include <sys/wait.h>
32 #include "test.h"
33 #include "safe_macros.h"
34 #include "clone_platform.h"
35 
36 static void setup(void);
37 static void cleanup(void);
38 static int do_child();
39 
40 char *TCID = "clone01";
41 int TST_TOTAL = 1;
42 
43 int main(int ac, char **av)
44 {
45 	void *child_stack;
46 	int status, child_pid;
47 
48 	tst_parse_opts(ac, av, NULL, NULL);
49 
50 	setup();
51 
52 	child_stack = malloc(CHILD_STACK_SIZE);
53 	if (child_stack == NULL)
54 		tst_brkm(TBROK, cleanup, "Cannot allocate stack for child");
55 
56 	tst_count = 0;
57 
58 	TEST(ltp_clone(SIGCHLD, do_child, NULL, CHILD_STACK_SIZE, child_stack));
59 	if (TEST_RETURN == -1)
60 		tst_resm(TFAIL | TTERRNO, "clone failed");
61 
62 	child_pid = SAFE_WAIT(cleanup, &status);
63 
64 	if (TEST_RETURN == child_pid)
65 		tst_resm(TPASS, "clone returned %ld", TEST_RETURN);
66 	else
67 		tst_resm(TFAIL, "clone returned %ld, wait returned %d",
68 			 TEST_RETURN, child_pid);
69 
70 	free(child_stack);
71 
72 	cleanup();
73 
74 	tst_exit();
75 }
76 
77 static void setup(void)
78 {
79 	tst_sig(FORK, DEF_HANDLER, cleanup);
80 	TEST_PAUSE;
81 }
82 
83 static void cleanup(void)
84 {
85 }
86 
87 static int do_child(void)
88 {
89 	exit(0);
90 }
91