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/*
* Copyright (c) International Business Machines Corp., 2009
* Copyright (c) Nadia Derbey, 2009
* 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
*
* Author: Nadia Derbey <Nadia.Derbey@bull.net>
*
* Check mqns isolation: father mqns cannot be accessed from newinstance
*
* Mount mqueue fs
* Create a posix mq -->mq1
* unshare
* In unshared process:
* Mount newinstance mqueuefs
* Check that mq1 is not readable from new ns
***************************************************************************/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <sys/wait.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mqns.h"
#include "mqns_helper.h"
char *TCID = "posixmq_namespace_01";
int TST_TOTAL = 1;
int p1[2];
int p2[2];
int check_mqueue(void *vtest)
{
char buf[30];
mqd_t mqd;
(void) vtest;
close(p1[1]);
close(p2[0]);
if (read(p1[0], buf, strlen("go") + 1) < 0) {
printf("read(p1[0], ...) failed: %s\n", strerror(errno));
exit(1);
}
mqd = tst_syscall(__NR_mq_open, NOSLASH_MQ1, O_RDONLY);
if (mqd == -1) {
if (write(p2[1], "notfnd", strlen("notfnd") + 1) < 0) {
perror("write(p2[1], ...) failed");
exit(1);
}
} else {
if (write(p2[1], "exists", strlen("exists") + 1) < 0) {
perror("write(p2[1], \"exists\", 7) failed");
exit(1);
} else if (mq_close(mqd) < 0) {
perror("mq_close(mqd) failed");
exit(1);
}
}
exit(0);
}
static void setup(void)
{
tst_require_root();
check_mqns();
}
int main(int argc, char *argv[])
{
int r;
mqd_t mqd;
char buf[30];
int use_clone = T_UNSHARE;
setup();
if (argc == 2 && strcmp(argv[1], "-clone") == 0) {
tst_resm(TINFO,
"Testing posix mq namespaces through clone(2).");
use_clone = T_CLONE;
} else
tst_resm(TINFO,
"Testing posix mq namespaces through unshare(2).");
if (pipe(p1) == -1 || pipe(p2) == -1) {
tst_brkm(TBROK | TERRNO, NULL, "pipe failed");
}
mqd = tst_syscall(__NR_mq_open, NOSLASH_MQ1, O_RDWR | O_CREAT | O_EXCL,
0777, NULL);
if (mqd == -1) {
perror("mq_open");
tst_brkm(TFAIL, NULL, "mq_open failed");
}
tst_resm(TINFO, "Checking namespaces isolation from parent to child");
/* fire off the test */
r = do_clone_unshare_test(use_clone, CLONE_NEWIPC, check_mqueue, NULL);
if (r < 0) {
tst_resm(TFAIL, "failed clone/unshare");
mq_close(mqd);
tst_syscall(__NR_mq_unlink, NOSLASH_MQ1);
tst_exit();
}
close(p1[0]);
close(p2[1]);
if (write(p1[1], "go", strlen("go") + 1) < 0)
tst_resm(TBROK | TERRNO, "write(p1[1], \"go\", ...) failed");
else if (read(p2[0], buf, 7) < 0)
tst_resm(TBROK | TERRNO, "read(p2[0], buf, ...) failed");
else {
if (!strcmp(buf, "exists")) {
tst_resm(TFAIL, "child process found mqueue");
} else if (!strcmp(buf, "notfnd")) {
tst_resm(TPASS, "child process didn't find mqueue");
} else {
tst_resm(TFAIL, "UNKNOWN RESULT");
}
}
/* destroy the mqueue */
if (mq_close(mqd) == -1) {
tst_brkm(TBROK | TERRNO, NULL, "mq_close failed");
}
tst_syscall(__NR_mq_unlink, NOSLASH_MQ1);
tst_exit();
}
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