1#ifndef _SYS_MSG_H
2#include <sysvipc/sys/msg.h>
3
4#ifndef _ISOMAC
5extern ssize_t __libc_msgrcv (int msqid, void *msgp, size_t msgsz,
6 long int msgtyp, int msgflg);
7extern int __libc_msgsnd (int msqid, const void *msgp, size_t msgsz,
8 int msgflg);
9
10# if __TIMESIZE == 64
11# define __msgctl64 __msgctl
12# else
13extern int __msgctl64 (int msqid, int cmd, struct __msqid64_ds *buf);
14libc_hidden_proto (__msgctl64);
15# endif
16
17#endif
18
19#endif
20

source code of glibc/sysdeps/unix/sysv/linux/include/sys/msg.h