#ifndef _SYS_IPC_H #define _SYS_IPC_H #ifdef __cplusplus extern "C" { #endif #define __NEED_uid_t #define __NEED_gid_t #define __NEED_mode_t #define __NEED_key_t #include #include key_t ftok (const char *, int); #ifdef __cplusplus } #endif #endif