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 "pidns_helper.h"
54 #include "test.h"
55
56 char *TCID = "pidns02";
57 int TST_TOTAL = 1;
58
59 #define PGID 1
60 #define SID 1
61
62 /*
63 * child_fn1() - Inside container
64 */
child_fn1(void * vtest)65 int child_fn1(void *vtest)
66 {
67 pid_t pgid, sid;
68
69 setsid();
70
71 pgid = getpgid(0);
72 sid = getsid(0);
73
74 printf("Checking session id & group id inside container\n");
75 if (pgid == PGID && sid == SID) {
76 printf("Success: Got Group ID = %d & Session ID = %d\n",
77 pgid, sid);
78 exit(0);
79 } else {
80 printf("Got unexpected result of Group ID = %d & Session ID = "
81 "%d\n", pgid, sid);
82 exit(1);
83 }
84 }
85
setup(void)86 static void setup(void)
87 {
88 tst_require_root();
89 check_newpid();
90 }
91
main(int argc,char * argv[])92 int main(int argc, char *argv[])
93 {
94 int status;
95
96 setup();
97
98 TEST(do_clone_unshare_test(T_CLONE, CLONE_NEWPID, child_fn1, NULL));
99 if (TEST_RETURN == -1) {
100 tst_brkm(TFAIL | TTERRNO, NULL, "clone failed");
101 } else if ((wait(&status)) == -1) {
102 tst_brkm(TFAIL | TERRNO, NULL, "wait failed");
103 }
104
105 if (WIFEXITED(status) && WEXITSTATUS(status) != 0) {
106 tst_resm(TFAIL | TERRNO, "child exited abnormally");
107 } else if (WIFSIGNALED(status)) {
108 tst_resm(TFAIL | TERRNO, "child exited with signal %d",
109 WTERMSIG(status));
110 }
111
112 tst_exit();
113
114 }
115