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: 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 "pidns_helper.h"
46#include "test.h"
47
48char *TCID = "pidns17";
49int TST_TOTAL = 1;
50
51int child_fn(void *);
52
53#define CHILD_PID       1
54#define PARENT_PID      0
55
56/*
57 * child_fn() - Inside container
58 */
59int child_fn(void *arg)
60{
61	int children[10], exit_val, i, status;
62	pid_t pid, ppid;
63
64	/* Set process id and parent pid */
65	pid = getpid();
66	ppid = getppid();
67	if (pid != CHILD_PID || ppid != PARENT_PID) {
68		printf("cinit: pidns was not created\n");
69		exit(1);
70	}
71
72	exit_val = 0;
73
74	/* Spawn many children */
75	for (i = 0; i < ARRAY_SIZE(children); i++) {
76		switch ((children[i] = fork())) {
77		case -1:
78			perror("fork failed");
79			exit_val = 1;
80			break;
81		case 0:
82			pause();
83			/* XXX (garrcoop): why exit with an exit code of 2? */
84			exit(2);
85			break;
86		default:
87			/* fork succeeded. */
88			break;
89		}
90	}
91	/* wait for last child to get scheduled */
92	sleep(1);
93
94	if (kill(-1, SIGUSR1) == -1) {
95		perror("cinit: kill(-1, SIGUSR1) failed");
96		exit_val = 1;
97	}
98
99	for (i = 0; i < ARRAY_SIZE(children); i++) {
100		if (waitpid(children[i], &status, 0) == -1) {
101			perror("cinit: waitpid failed");
102			kill(children[i], SIGTERM);
103			waitpid(children[i], &status, 0);
104			exit_val = 1;
105		}
106		if (!(WIFSIGNALED(status) || WTERMSIG(status) == SIGUSR1)) {
107			/*
108			 * XXX (garrcoop): this status reporting is overly
109			 * noisy. Someone obviously needs to read the
110			 * constraints documented in wait(2) a bit more
111			 * closely -- in particular the relationship between
112			 * WIFEXITED and WEXITSTATUS, and WIFSIGNALED and
113			 * WTERMSIG.
114			 */
115			printf("cinit: found a child alive still "
116			       "%d exit: %d, %d, signal %d, %d", i,
117			       WIFEXITED(status), WEXITSTATUS(status),
118			       WIFSIGNALED(status), WTERMSIG(status));
119			exit_val = 1;
120		}
121	}
122	if (exit_val == 0)
123		printf("cinit: all children have terminated.\n");
124
125	exit(exit_val);
126}
127
128static void setup(void)
129{
130	tst_require_root();
131	check_newpid();
132}
133
134int main(int argc, char *argv[])
135{
136	int status;
137	pid_t pid;
138
139	setup();
140
141	pid = getpid();
142
143	/* Container creation on PID namespace */
144	TEST(do_clone_unshare_test(T_CLONE, CLONE_NEWPID, child_fn, NULL));
145	if (TEST_RETURN == -1) {
146		tst_brkm(TBROK | TERRNO, NULL, "clone failed");
147	}
148
149	sleep(1);
150	if (wait(&status) == -1)
151		tst_resm(TFAIL, "waitpid failed");
152
153	if (WIFEXITED(status) && WEXITSTATUS(status) != 0)
154		tst_resm(TFAIL, "container exited abnormally");
155	else if (WIFSIGNALED(status))
156		tst_resm(TFAIL,
157			 "container was signaled with signal = %d",
158			 WTERMSIG(status));
159
160	tst_exit();
161
162}
163