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: pidns10.c
17 * *
18 * * Description:
19 * * The pidns10.c testcase verifies inside the container, if kill(-1, signal)
20 * * fails with ESRCH when there are no processes in container.
21 * *
22 * * Test Assertion & Strategy:
23 * * Create a PID namespace container.
24 * * Invoke kill(-1, SIGUSR1) inside container and check return code and error.
25 * * kill() should have failed;except swapper & init, no process is inside.
26 * *
27 * * Usage: <for command-line>
28 * * pidns10
29 * *
30 * * History:
31 * * DATE NAME DESCRIPTION
32 * * 13/11/08 Gowrishankar M Creation of this test.
33 * * <gowrishankar.m@in.ibm.com>
34 *
35 ******************************************************************************/
36 #define _GNU_SOURCE 1
37 #include <sys/wait.h>
38 #include <sys/types.h>
39 #include <string.h>
40 #include <stdlib.h>
41 #include <unistd.h>
42 #include <stdio.h>
43 #include <errno.h>
44 #include "test.h"
45 #include "libclone.h"
46 #include "pidns_helper.h"
47
48 char *TCID = "pidns10";
49 int TST_TOTAL = 1;
50 int errno;
51
52 int child_fn(void *);
53
54 #define CHILD_PID 1
55 #define PARENT_PID 0
56
57 /*
58 * child_fn() - Inside container
59 */
child_fn(void * arg)60 int child_fn(void *arg)
61 {
62 int exit_val, ret;
63 pid_t pid, ppid;
64
65 /* Set process id and parent pid */
66 pid = getpid();
67 ppid = getppid();
68 if (pid != CHILD_PID || ppid != PARENT_PID) {
69 printf("cinit: pidns was not created.\n");
70 return 1;
71 }
72
73 if ((ret = kill(-1, SIGUSR1)) == -1 && errno == ESRCH) {
74 printf("cinit: kill(-1, sig) failed with -1 / ESRCH as "
75 "expected\n");
76 exit_val = 0;
77 } else {
78 printf("cinit: kill(-1, sig) didn't fail with -1 / ESRCH "
79 "(%d); failed with %d / %d instead", ESRCH, ret, errno);
80 exit_val = 1;
81 }
82 exit(exit_val);
83 }
84
setup(void)85 static void setup(void)
86 {
87 tst_require_root();
88 check_newpid();
89 }
90
main(int argc,char * argv[])91 int main(int argc, char *argv[])
92 {
93 int status;
94 pid_t pid;
95
96 setup();
97
98 pid = getpid();
99
100 /* Container creation on PID namespace */
101 TEST(do_clone_unshare_test(T_CLONE, CLONE_NEWPID, child_fn, NULL));
102 if (TEST_RETURN == -1) {
103 tst_brkm(TBROK | TTERRNO, NULL, "clone failed");
104 }
105
106 sleep(1);
107 if (wait(&status) < 0)
108 tst_resm(TWARN, "parent: waitpid() failed.");
109
110 if (WIFEXITED(status) && WEXITSTATUS(status) != 0)
111 tst_resm(TBROK, "container was terminated abnormally");
112
113 tst_exit();
114 }
115