struct ipc_perm
{
key_t __ipc_perm_key;
uid_t uid;
gid_t gid;
uid_t cuid;
gid_t cgid;
mode_t mode;
int __ipc_perm_seq;
int __pad1;
long long __pad2;
long long __pad3;
};
#define IPC_64 0x100