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/*
* Test PID namespace translation
*
* Copyright (c) 2020 Ákos Uzonyi <uzonyi.akos@gmail.com>
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "tests.h"
#include "scno.h"
#include "pidns.h"
#ifdef __NR_fork
# include <errno.h>
# include <limits.h>
# include <sched.h>
# include <signal.h>
# include <stdio.h>
# include <stdlib.h>
# include <sys/wait.h>
# include <unistd.h>
# include <linux/sched.h>
# include "nsfs.h"
# ifndef CLONE_NEWUSER
# define CLONE_NEWUSER 0x10000000
# endif
# ifndef CLONE_NEWPID
# define CLONE_NEWPID 0x20000000
# endif
static int
fork_chain(int depth)
{
if (!depth)
return 0;
int pid = syscall(__NR_fork);
if (pid < 0)
return errno;
if (!pid)
_exit(fork_chain(depth - 1));
int status;
if (wait(&status) < 0)
return errno;
if (!WIFEXITED(status))
return -1;
return WEXITSTATUS(status);
}
int main(void)
{
check_ns_ioctl();
if (unshare(CLONE_NEWPID | CLONE_NEWUSER) < 0) {
if (errno == EPERM)
perror_msg_and_skip("unshare");
perror_msg_and_fail("unshare");
}
errno = fork_chain(2);
if (errno)
perror("fork_chain");
}
#else
SKIP_MAIN_UNDEFINED("__NR_fork")
#endif
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