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297 lines
7.2 KiB
297 lines
7.2 KiB
/*
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* Copyright (c) Bull S.A.S. 2008
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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: pidns30.c
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*
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* Description:
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* This testcase checks if the si_pid is correctly set when a process
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* that has registered for notification on a posix mqueue is in a
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* descendant namespace wrt the process that sends a message to that posix
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* mqueue.
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*
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* Test Assertion & Strategy:
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* Parent Child
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* --------------------------------------------------------------------------
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* Create a POSIX mqueue.
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* Create a PID namespace container.
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* Open that mqueue for reading
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* Register for notification when a
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* message arrives in that mqueue
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* Install a handler for SIGUSR1.
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* Write something to the mqueue.
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* Inside the handler, check that
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* si_pid is set to 0
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*
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* Usage: <for command-line>
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* pidns30
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*
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* History:
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* DATE NAME DESCRIPTION
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* 01/12/08 Nadia Derbey Creation of this test.
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* <Nadia.Derbey@bull.net>
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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 <sys/types.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <mqueue.h>
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#include "lapi/syscalls.h"
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#include "pidns_helper.h"
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#include "test.h"
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char *TCID = "pidns30";
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int TST_TOTAL = 1;
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char *mqname = "mq1";
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int result = TFAIL;
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int father_to_child[2];
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int child_to_father[2];
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#define CHILD_PID 1
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#define PARENT_PID 0
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#define MSG "HOW ARE YOU"
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#define MSG_PRIO 1
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#define NO_STEP -1
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#define F_STEP_0 0x00
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#define F_STEP_1 0x01
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#define F_STEP_2 0x02
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#define F_STEP_3 0x03
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#define C_STEP_0 0x10
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#define C_STEP_1 0x11
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#define C_STEP_2 0x12
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mqd_t rc = -1;
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mqd_t mqd = -1;
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static void remove_pipe(int *fd)
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{
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close(fd[0]);
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close(fd[1]);
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}
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static void remove_mqueue(mqd_t mqd)
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{
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mq_close(mqd);
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ltp_syscall(__NR_mq_unlink, mqname);
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}
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static void cleanup(void)
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{
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if (mqd != -1) {
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remove_mqueue(mqd);
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}
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if (rc != -1) {
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remove_mqueue(rc);
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}
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remove_pipe(father_to_child);
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remove_pipe(child_to_father);
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}
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static void cleanup_child(void)
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{
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if (mqd != -1) {
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ltp_syscall(__NR_mq_notify, mqd, NULL);
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}
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cleanup();
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}
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/*
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* child_signal_handler() - to handle SIGUSR1
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*
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* XXX (garrcoop): add calls to cleanup_child() -- or should this be handled
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* from the libltp signal handler?
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*/
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static void child_signal_handler(int sig, siginfo_t * si, void *unused)
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{
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char buf[256];
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struct mq_attr attr;
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if (si->si_signo != SIGUSR1) {
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printf("received signal = %d unexpectedly\n", si->si_signo);
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return;
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}
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if (si->si_code != SI_MESGQ) {
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printf("expected signal code SI_MESGQ; got %d instead\n",
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si->si_code);
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return;
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}
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if (si->si_pid) {
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printf("expected signal originator PID = 0; got %d instead\n",
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si->si_pid);
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return;
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} else {
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printf("signal originator PID = 0\n");
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result = TPASS;
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}
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/*
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* Now read the message - Be silent on errors since this is not the
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* test purpose.
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*/
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rc = mq_getattr(si->si_int, &attr);
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if (rc != -1)
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mq_receive(si->si_int, buf, attr.mq_msgsize, NULL);
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}
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/*
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* child_fn() - Inside container
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*
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* XXX (garrcoop): add more calls to cleanup_child()?
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*/
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int child_fn(void *arg)
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{
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pid_t pid, ppid;
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struct sigaction sa;
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struct sigevent notif;
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char buf[5];
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/* Set process id and parent pid */
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pid = getpid();
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ppid = getppid();
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if (pid != CHILD_PID || ppid != PARENT_PID) {
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printf("pidns was not created\n");
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return 1;
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}
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/* Close the appropriate end of each pipe */
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close(child_to_father[0]);
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close(father_to_child[1]);
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while (read(father_to_child[0], buf, 1) != 1)
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sleep(1);
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mqd = ltp_syscall(__NR_mq_open, mqname, O_RDONLY, 0, NULL);
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if (mqd == -1) {
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perror("mq_open failed");
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return 1;
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} else
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printf("mq_open succeeded\n");
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/* Register for notification on message arrival */
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notif.sigev_notify = SIGEV_SIGNAL;
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notif.sigev_signo = SIGUSR1;
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notif.sigev_value.sival_int = mqd;
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if (ltp_syscall(__NR_mq_notify, mqd, ¬if) == -1) {
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perror("mq_notify failed");
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return 1;
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} else
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printf("successfully registered for notification\n");
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/* Define handler for SIGUSR1 */
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sa.sa_flags = SA_SIGINFO;
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sigemptyset(&sa.sa_mask);
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sa.sa_sigaction = child_signal_handler;
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if (sigaction(SIGUSR1, &sa, NULL) == -1) {
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perror("sigaction failed");
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return 1;
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} else
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printf("successfully registered handler for SIGUSR1\n");
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/* Ask parent to send a message to the mqueue */
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if (write(child_to_father[1], "c:ok", 5) != 5) {
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perror("write failed");
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return 1;
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}
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sleep(3);
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/* Has parent sent a message? */
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read(father_to_child[0], buf, 5);
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if (strcmp(buf, "f:ok") != 0) {
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printf("parent did not send the message!\n");
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return 1;
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}
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printf("parent is done - cleaning up\n");
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cleanup_child();
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exit(0);
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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 status;
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char buf[5];
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pid_t cpid;
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setup();
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if (pipe(child_to_father) == -1 || pipe(father_to_child) == -1) {
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tst_brkm(TBROK | TERRNO, cleanup, "pipe failed");
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}
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ltp_syscall(__NR_mq_unlink, mqname);
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/* container creation on PID namespace */
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cpid = ltp_clone_quick(CLONE_NEWPID | SIGCHLD, child_fn, NULL);
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if (cpid == -1)
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tst_brkm(TBROK | TERRNO, cleanup, "clone failed");
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mqd =
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ltp_syscall(__NR_mq_open, mqname, O_RDWR | O_CREAT | O_EXCL, 0777,
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NULL);
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if (mqd == -1)
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tst_brkm(TBROK | TERRNO, cleanup, "mq_open failed");
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else
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tst_resm(TINFO, "successfully created posix mqueue");
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if (write(father_to_child[1], buf, 1) != 1)
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tst_brkm(TBROK | TERRNO, cleanup, "write failed");
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/* Close the appropriate end of each pipe */
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close(child_to_father[1]);
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close(father_to_child[0]);
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/* Is container ready */
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read(child_to_father[0], buf, 5);
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if (strcmp(buf, "c:ok") != 0)
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tst_brkm(TBROK, cleanup,
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"container did not respond as expected!");
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rc = mq_send(mqd, MSG, strlen(MSG), MSG_PRIO);
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if (rc == -1)
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tst_brkm(TBROK | TERRNO, cleanup, "mq_send failed");
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else
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tst_resm(TINFO, "mq_send succeeded");
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/* Tell the child the message has been sent */
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if (write(father_to_child[1], "f:ok", 5) != 5)
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tst_brkm(TBROK | TERRNO, cleanup, "write failed");
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/* Wait for child to finish */
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if (wait(&status) == -1)
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tst_resm(TBROK | TERRNO, "wait failed");
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cleanup();
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tst_exit();
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}
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