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