pidns02.c revision d832cc184604c4e744f30fc819928175c6366317 
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
17* File: pidns02.c
18*
19* Description:
20*	The pidns02.c testcase builds into the ltp framework to verify
21*	the basic functionality of PID Namespace.
22*
23* Verify that:
24* 1. When parent clone a process with flag CLONE_NEWPID, the session ID of
25* child should be always one.
26*
27* 2. When parent clone a process with flag CLONE_NEWPID, the parent process group ID
28* should be always one.
29*
30* Total Tests
31*
32* Test Name: pidns02
33*
34* Test Assertion & Strategy:
35*
36* From main() clone a new child process with passing the clone_flag as CLONE_NEWPID,
37* Call the setid() inside container.
38* Inside the cloned pid check for the getsid(0) and getpgid(0)
39* Verify with global macro defined value for parent pid & child pid.
40*
41* Usage: <for command-line>
42* pidns02
43*/
44
45#define _GNU_SOURCE
46#include <sys/wait.h>
47#include <assert.h>
48#include <stdio.h>
49#include <stdlib.h>
50#include <unistd.h>
51#include <string.h>
52#include <errno.h>
53#include "test.h"
54#include "libclone.h"
55#include "pidns_helper.h"
56
57char *TCID = "pidns02";
58int TST_TOTAL = 1;
59
60#define PGID	1
61#define SID	1
62
63/*
64 * child_fn1() - Inside container
65 */
66int child_fn1(void *vtest)
67{
68	pid_t pgid, sid;
69
70	setsid();
71
72	pgid = getpgid(0);
73	sid = getsid(0);
74
75	printf("Checking session id & group id inside container\n");
76	if (pgid == PGID && sid == SID) {
77		printf("Success: Got Group ID = %d & Session ID = %d\n",
78		       pgid, sid);
79		exit(0);
80	} else {
81		printf("Got unexpected result of Group ID = %d & Session ID = "
82		       "%d\n", pgid, sid);
83		exit(1);
84	}
85}
86
87static void setup(void)
88{
89	tst_require_root(NULL);
90	check_newpid();
91}
92
93int main(int argc, char *argv[])
94{
95	int status;
96
97	setup();
98
99	TEST(do_clone_unshare_test(T_CLONE, CLONE_NEWPID, child_fn1, NULL));
100	if (TEST_RETURN == -1) {
101		tst_brkm(TFAIL | TTERRNO, NULL, "clone failed");
102	} else if ((wait(&status)) == -1) {
103		tst_brkm(TFAIL | TERRNO, NULL, "wait failed");
104	}
105
106	if (WIFEXITED(status) && WEXITSTATUS(status) != 0) {
107		tst_resm(TFAIL | TERRNO, "child exited abnormally");
108	} else if (WIFSIGNALED(status)) {
109		tst_resm(TFAIL | TERRNO, "child exited with signal %d",
110			 WTERMSIG(status));
111	}
112
113	tst_exit();
114
115}
116