pidns17.c revision c2c8d7f6d8d77f9755a919bf8fdd858ba4c9fbdb 
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
14*
15***************************************************************************
16* File: pidns17.c
17* *
18* * Description:
19* *  The pidns17.c testcase verifies inside the container, if kill(-1, SIGUSR1)
20* *  terminates all children running inside.
21* *
22* * Test Assertion & Strategy:
23* *  Create a PID namespace container.
24* *  Spawn many children inside it.
25* *  Invoke kill(-1, SIGUSR1) inside container and check if it terminates
26* *  all children.
27* *
28* * Usage: <for command-line>
29* *  pidns17
30* *
31* * History:
32* *  DATE      NAME                             DESCRIPTION
33* *  13/11/08  Gowrishankar M 			Creation of this test.
34* *            <gowrishankar.m@in.ibm.com>
35*
36******************************************************************************/
37#define _GNU_SOURCE 1
38#include <sys/wait.h>
39#include <sys/types.h>
40#include <string.h>
41#include <stdlib.h>
42#include <unistd.h>
43#include <stdio.h>
44#include <errno.h>
45#include <usctest.h>
46#include <test.h>
47#define CLEANUP cleanup
48#include "libclone.h"
49
50char *TCID = "pidns17";
51int TST_TOTAL = 1;
52int errno;
53
54int child_fn(void *);
55
56#define CHILD_PID       1
57#define PARENT_PID      0
58
59/*
60 * child_fn() - Inside container
61 */
62int child_fn(void *arg)
63{
64	pid_t pid, ppid;
65	int i, children[10], status;
66
67	/* Set process id and parent pid */
68	pid = getpid();
69	ppid = getppid();
70	if (pid != CHILD_PID || ppid != PARENT_PID) {
71		tst_brkm(TBROK | TERRNO, CLEANUP, "cinit: pidns is not created.");
72	}
73
74	/* Spawn many children */
75	for (i = 0; i < (sizeof(children) / sizeof(children[0])); i++) {
76		switch ((children[i] = fork())) {
77		case -1:
78			tst_brkm(TBROK | TERRNO, CLEANUP, "fork failed");
79			break;
80		case 0:
81			pause();
82			exit(2);
83			break;
84		default:
85			/* fork succeeded. */
86			break;
87		}
88	}
89	/* wait for last child to get scheduled */
90	sleep(1);
91
92	if (kill(-1, SIGUSR1) == -1) {
93		tst_resm(TBROK | TERRNO, "cinit: kill(-1, SIGUSR1) failed");
94		CLEANUP();
95	}
96
97	for (i = 0; i < (sizeof(children) / sizeof(children[0])); i++) {
98		if (waitpid(children[i], &status, 0) == -1) {
99			tst_resm(TBROK | TERRNO, "cinit: waitpid() failed");
100			CLEANUP();
101		}
102		if (!(WIFSIGNALED(status) && WTERMSIG(status) == SIGUSR1)) {
103			tst_resm(TFAIL, "cinit: found a child alive still "
104					"%d exit: %d, %d, signal %d, %d", i,
105					WIFEXITED(status), WEXITSTATUS(status),
106					WIFSIGNALED(status), WTERMSIG(status));
107			CLEANUP();
108		}
109	}
110	tst_resm(TPASS, "cinit: all children are terminated.");
111
112	/* cleanup and exit */
113	CLEANUP();
114}
115
116/***********************************************************************
117*   M A I N
118***********************************************************************/
119
120int main(int argc, char *argv[])
121{
122	int status, ret;
123	pid_t pid;
124
125	pid = getpid();
126
127	/* Container creation on PID namespace */
128	ret = do_clone_unshare_test(T_CLONE, CLONE_NEWPID, child_fn, NULL);
129	if (ret != 0) {
130		tst_resm(TBROK | TERRNO, "parent: clone() failed");
131		CLEANUP();
132	}
133
134	sleep(1);
135	if (waitpid(-1, &status, __WALL) < 0)
136		tst_resm(TWARN, "parent: waitpid() failed.");
137
138	if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
139		tst_resm(TWARN, "parent: container was terminated by %s",
140				strsignal(WTERMSIG(status)));
141
142	/* cleanup and exit */
143	CLEANUP();
144}	/* End main */
145
146/*
147 * cleanup() - performs all ONE TIME cleanup for this test at
148 *             completion or premature exit.
149 */
150void cleanup()
151{
152	/* Clean the test testcase as LTP wants*/
153	TEST_CLEANUP;
154	tst_exit();
155	/* NOTREACHED */
156}
157