/* Linux-specific program to run its arguments in a new namespace.
   Must be run as root.
   Adam Sampson <ats@offog.org> */

#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>

#include <asm/unistd.h>
#include <sched.h>

#define __NR_sys_clone __NR_clone
_syscall2(int, sys_clone, int, flags, void *, child_stack)

int main(int argc, char **argv) {
	pid_t pid;
	int status;

	pid = sys_clone(CLONE_NEWNS | SIGCHLD, 0);
	if (pid < 0) {
		perror("clone failed");
		return 1;
	}

	if (pid == 0) {
		execvp(argv[1], &argv[1]);
		perror("execvp failed");
		_exit(99);
	}

	if (wait(&status) < 0) {
		perror("wait failed");
		return 1;
	}

	if (WIFEXITED(status)) {
		return WEXITSTATUS(status);
	} else {
		return 98;
	}
}