#include <sys/syscall.h>
#include <asm/unistd.h>
#include <unistd.h>
#include <stdint.h>
#include <errno.h>
#include <stdlib.h>

#define VC_CATEGORY(c)		(((c) >> 24) & 0x3F)
#define VC_COMMAND(c)		(((c) >> 16) & 0xFF)
#define VC_VERSION(c)		((c) & 0xFFF)

#define VC_CMD(c,i,v)		((((VC_CAT_ ## c) & 0x3F) << 24) \
				| (((i) & 0xFF) << 16) | ((v) & 0xFFF))

#define VC_CAT_COMPAT		63
#define VCMD_new_s_context	VC_CMD(COMPAT, 1, 1)


#ifndef __NR_vserver
#  define __NR_vserver	273
#endif

inline static
_syscall3(int, vserver, uint32_t, cmd, uint32_t, id, void *, data)


struct  vcmd_new_s_context_v1 {
	uint32_t remove_cap;
	uint32_t flags;
};
  
int main(int argc)
{
  struct vcmd_new_s_context_v1	msg = { 0,0 };
  pid_t				pid;
  int ret = 0;
  
  vserver(VCMD_new_s_context, -1, &msg);
  pid = fork();
  if (pid==0) {
    msg.flags |= (argc > 1)?0:16;
    ret = vserver(VCMD_new_s_context, -2, &msg);
    printf("ret=%u\n", ret);
    return 0;
  }
  printf("child=%u, parent=%u\n", pid, getpid());

  sleep(2);
  return 0;
}