pidns01.c revision 45192246690d9c8389f48602dfeb8877d40094bc 
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: pidns01.c
18*
19* Description:
20*  The pidns01.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 process ID of
25* child should be always one.
26*
27* 2. When parent clone a process with flag CLONE_NEWPID, the parent process ID of
28* should be always zero.
29*
30* Total Tests:
31*
32* Test Name: pidns01
33*
34* Test Assertion & Strategy:
35*
36* From main() clone a new child process with passing the clone_flag as CLONE_NEWPID,
37* Inside the cloned pid check for the getpid() and getppid()
38* Verify with global macro defined value for parent pid & child pid.
39*
40* Usage: <for command-line>
41* pidns01
42*
43* History:
44*
45* FLAG DATE		NAME			DESCRIPTION
46* 27/12/07  RISHIKESH K RAJAK <risrajak@in.ibm.com> Created this test
47*
48*******************************************************************************************/
49#define _GNU_SOURCE
50#include <sys/wait.h>
51#include <assert.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <unistd.h>
55#include <string.h>
56#include <errno.h>
57#include "usctest.h"
58#include "test.h"
59#define CLEANUP cleanup
60#include "libclone.h"
61
62char *TCID = "pid_namespace1";
63int TST_TOTAL = 1;
64
65#define CHILD_PID       1
66#define PARENT_PID      0
67
68/*
69 * child_fn1() - Inside container
70 */
71int child_fn1(void *ttype)
72{
73	int exit_val;
74	pid_t cpid, ppid;
75	cpid = getpid();
76	ppid = getppid();
77
78	tst_resm(TINFO, "PIDNS test is running inside container");
79	if (cpid == CHILD_PID && ppid == PARENT_PID) {
80		printf("Got expected cpid and ppid\n");
81		exit_val = 0;
82	} else {
83		printf("Got unexpected result of cpid=%d ppid=%d\n",
84		       cpid, ppid);
85		exit_val = 1;
86	}
87
88	return exit_val;
89}
90
91int main(int argc, char *argv[])
92{
93	int status;
94
95	TEST(do_clone_unshare_test(T_CLONE, CLONE_NEWPID, child_fn1, NULL));
96
97	if (TEST_RETURN == -1) {
98		tst_brkm(TFAIL | TTERRNO, cleanup, "clone failed");
99	} else if ((wait(&status)) == -1) {
100		tst_brkm(TWARN | TERRNO, cleanup, "wait failed");
101	}
102
103	if (WIFEXITED(status) && WEXITSTATUS(status) != 0)
104		tst_resm(TFAIL, "child exited abnormally");
105	else if (WIFSIGNALED(status)) {
106		tst_resm(TFAIL, "child was killed with signal = %d",
107			 WTERMSIG(status));
108	}
109
110	cleanup();
111	tst_exit();
112}
113
114static void cleanup()
115{
116	/* Clean the test testcase as LTP wants */
117	TEST_CLEANUP;
118}
119