1struct ipc_perm {
 2	key_t __ipc_perm_key;
 3	uid_t uid;
 4	gid_t gid;
 5	uid_t cuid;
 6	gid_t cgid;
 7	mode_t mode;
 8	int __ipc_perm_seq;
 9	long __pad1;
10	long __pad2;
11};