| /* |
| * Copyright (c) International Business Machines Corp., 2007 |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU General Public License for more details. |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| * |
| *************************************************************************** |
| |
| * File: pidns04.c |
| * |
| * Description: |
| * The pidns04.c testcase builds into the ltp framework to verify |
| * the basic functionality of PID Namespace. |
| * |
| * Verify that: |
| * 1. When parent clone a process with flag CLONE_NEWPID, the process ID of |
| * child should be one. |
| * |
| * 2. When parent clone a process with flag CLONE_NEWPID, the parent process ID |
| * of should be zero. |
| * |
| * 3. The container init process (one), should not get killed by the SIGKILL in |
| * the childNS |
| * |
| * Total Tests: |
| * |
| * Test Name: pidns04 |
| * |
| * Test Assertion & Strategy: |
| * |
| * From main() clone a new child process with passing the clone_flag as |
| * CLONE_NEWPID. |
| * The container init, should not get killed by the SIGKILL inside the child NS. |
| * Usage: <for command-line> |
| * pidns04 |
| * |
| * History: |
| * |
| * FLAG DATE NAME DESCRIPTION |
| * 08/10/08 Veerendra C <vechandr@in.ibm.com> Verifies killing of cont init. |
| * |
| *******************************************************************************/ |
| #define _GNU_SOURCE 1 |
| #include <sys/wait.h> |
| #include <assert.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include <errno.h> |
| #include "test.h" |
| #define CLEANUP cleanup |
| #include "libclone.h" |
| #include "pidns_helper.h" |
| |
| #define INIT_PID 1 |
| #define CHILD_PID 1 |
| #define PARENT_PID 0 |
| |
| char *TCID = "pid_namespace4"; |
| int TST_TOTAL = 1; |
| int fd[2]; |
| |
| /* |
| * child_fn1() - Inside container |
| */ |
| static int child_fn1(void *ttype) |
| { |
| int exit_val; |
| pid_t cpid, ppid; |
| cpid = getpid(); |
| ppid = getppid(); |
| char mesg[] = "I was not killed !"; |
| /* Child process closes up read side of pipe */ |
| close(fd[0]); |
| |
| /* Comparing the values to make sure pidns is created correctly */ |
| if ((cpid == CHILD_PID) && (ppid == PARENT_PID)) { |
| printf("PIDNS test is running inside container\n"); |
| kill(INIT_PID, SIGKILL); |
| /* Verifying whether the container init is not killed, " |
| If so writing into the pipe created in the parent NS" */ |
| |
| /* Send "mesg" through the write side of pipe */ |
| write(fd[1], mesg, (strlen(mesg) + 1)); |
| exit_val = 0; |
| } else { |
| printf("got unexpected result of cpid=%d ppid=%d\n", |
| cpid, ppid); |
| exit_val = 1; |
| } |
| exit(exit_val); |
| } |
| |
| static void setup(void) |
| { |
| tst_require_root(NULL); |
| check_newpid(); |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| int nbytes, status; |
| char readbuffer[80]; |
| |
| setup(); |
| |
| pipe(fd); |
| TEST(do_clone_unshare_test(T_CLONE, CLONE_NEWPID, child_fn1, NULL)); |
| if (TEST_RETURN == -1) { |
| tst_brkm(TFAIL | TTERRNO, CLEANUP, "clone failed"); |
| } else if (wait(&status) == -1) { |
| tst_brkm(TFAIL | TERRNO, CLEANUP, "wait failed"); |
| } |
| |
| /* Parent process closes up write side of pipe */ |
| close(fd[1]); |
| /* Read in a string from the pipe */ |
| nbytes = read(fd[0], readbuffer, sizeof(readbuffer)); |
| |
| if (0 <= nbytes) { |
| tst_resm(TPASS, "Container init : %s", readbuffer); |
| } else { |
| tst_brkm(TFAIL, CLEANUP, |
| "Container init is killed by SIGKILL !!!"); |
| } |
| |
| if (WIFEXITED(status) && WEXITSTATUS(status) != 0) { |
| tst_resm(TFAIL, "Container init pid exited abnormally"); |
| } else if (WIFSIGNALED(status)) { |
| tst_resm(TFAIL, "Container init pid got killed by signal %d", |
| WTERMSIG(status)); |
| } |
| CLEANUP(); |
| |
| tst_exit(); |
| |
| } |
| |
| static void cleanup(void) |
| { |
| close(fd[0]); |
| } |