rump kernel ioctl issue

pts.c

#include <dlfcn.h>
#include <stdio.h>
#include <sys/types.h>
#include <inttypes.h>

#include <rump/rump.h>
#include <rump/rump_syscalls.h>
#include <rump/netconfig.h>

typedef uint32_t _netbsd_mode_t;
struct ptyfs_args {
  int version;
  gid_t gid;
  _netbsd_mode_t mode;
  int flags;
};
struct ptmget {
  int     cfd;
  int     sfd;
  char    cn[16];
  char    sn[16];
};

int main() {

  int (*init)(void);

  int (*mkdir)(const char *, _netbsd_mode_t);
  int (*mount)(const char *, const char *, int, void *, size_t);
  int (*open)(const char *, int, _netbsd_mode_t);
  int (*ioctl)(int, unsigned long, ...);

  void *rumpuser = dlopen("librumpuser.so", RTLD_GLOBAL|RTLD_LAZY);
  void *rump = dlopen("librump.so", RTLD_GLOBAL|RTLD_LAZY);
  void *net = dlopen("librumpvfs.so", RTLD_GLOBAL|RTLD_LAZY);
  void *netnet = dlopen("librumpkern_tty.so", RTLD_GLOBAL|RTLD_LAZY);
  void *netinet = dlopen("librumpfs_ptyfs.so", RTLD_GLOBAL|RTLD_LAZY);

  int fd;
  int TIOCPTSNAME = 1076393032;

  struct ptyfs_args pta = {2, 0, 0666, 0};
  struct ptmget pm;

  if (! rump) {
    fprintf(stderr, "rump null\n");
    return 1;
  }

  init = dlsym(rump, "rump_init");

  if (! init) {
    fprintf(stderr, "init null\n");
    return 1;
  }

  init();

  mkdir = dlsym(rump, "rump___sysimpl_mkdir");
  mount = dlsym(rump, "rump___sysimpl_mount50");
  open = dlsym(rump, "rump___sysimpl_open");
  ioctl = dlsym(rump, "rump___sysimpl_ioctl");

  if (! (mount && mkdir && open && ioctl)) {
    fprintf(stderr, "syscall null\n");
    return 1;
  }

  if (mkdir("/dev/pts", 0555) == -1) {
    fprintf(stderr, "mkdir\n");
    return 1;
  }

  if (mount("ptyfs", "/dev/pts", 0, (void *)&pta, sizeof(pta)) == -1) {
    fprintf(stderr, "mount\n");
    return 1;
  }

  fd = open("/dev/ptmx", 0x8002, 0);  /* RDWR|NOCTTY */
  if (fd == -1) {
    fprintf(stderr, "open\n");
    return 1;
  }

  if (ioctl(fd, TIOCPTSNAME, &pm) == -1) {
    fprintf(stderr, "ioctl\n");
    return 1;
  }

  return 0; 
}