1 /*
2 * Copyright (c) International Business Machines Corp., 2007
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
10 * the GNU General Public License for more details.
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
14 *
15 ***************************************************************************
16 * File: pidns10.c
17 * *
18 * * Description:
19 * *  The pidns10.c testcase verifies inside the container, if kill(-1, signal)
20 * *  fails with ESRCH when there are no processes in container.
21 * *
22 * * Test Assertion & Strategy:
23 * *  Create a PID namespace container.
24 * *  Invoke kill(-1, SIGUSR1) inside container and check return code and error.
25 * *  kill() should have failed;except swapper & init, no process is inside.
26 * *
27 * * Usage: <for command-line>
28 * *  pidns10
29 * *
30 * * History:
31 * *  DATE      NAME                             DESCRIPTION
32 * *  13/11/08  Gowrishankar M 			Creation of this test.
33 * *            <gowrishankar.m@in.ibm.com>
34 *
35 ******************************************************************************/
36 #define _GNU_SOURCE 1
37 #include <sys/wait.h>
38 #include <sys/types.h>
39 #include <string.h>
40 #include <stdlib.h>
41 #include <unistd.h>
42 #include <stdio.h>
43 #include <errno.h>
44 #include "pidns_helper.h"
45 #include "test.h"
46 
47 char *TCID = "pidns10";
48 int TST_TOTAL = 1;
49 
50 int child_fn(void *);
51 
52 #define CHILD_PID       1
53 #define PARENT_PID      0
54 
55 /*
56  * child_fn() - Inside container
57  */
58 int child_fn(void *arg)
59 {
60 	int exit_val, ret;
61 	pid_t pid, ppid;
62 
63 	/* Set process id and parent pid */
64 	pid = getpid();
65 	ppid = getppid();
66 	if (pid != CHILD_PID || ppid != PARENT_PID) {
67 		printf("cinit: pidns was not created.\n");
68 		return 1;
69 	}
70 
71 	if ((ret = kill(-1, SIGUSR1)) == -1 && errno == ESRCH) {
72 		printf("cinit: kill(-1, sig) failed with -1 / ESRCH as "
73 		       "expected\n");
74 		exit_val = 0;
75 	} else {
76 		printf("cinit: kill(-1, sig) didn't fail with -1 / ESRCH "
77 		       "(%d); failed with %d / %d instead", ESRCH, ret, errno);
78 		exit_val = 1;
79 	}
80 	exit(exit_val);
81 }
82 
83 static void setup(void)
84 {
85 	tst_require_root();
86 	check_newpid();
87 }
88 
89 int main(int argc, char *argv[])
90 {
91 	int status;
92 	pid_t pid;
93 
94 	setup();
95 
96 	pid = getpid();
97 
98 	/* Container creation on PID namespace */
99 	TEST(do_clone_unshare_test(T_CLONE, CLONE_NEWPID, child_fn, NULL));
100 	if (TEST_RETURN == -1) {
101 		tst_brkm(TBROK | TTERRNO, NULL, "clone failed");
102 	}
103 
104 	sleep(1);
105 	if (wait(&status) < 0)
106 		tst_resm(TWARN, "parent: waitpid() failed.");
107 
108 	if (WIFEXITED(status) && WEXITSTATUS(status) != 0)
109 		tst_resm(TBROK, "container was terminated abnormally");
110 
111 	tst_exit();
112 }
113