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 */ 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 86 static void setup(void) 87 { 88 tst_require_root(); 89 check_newpid(); 90 } 91 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