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