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Types: TextFile
Notes: @(#)msg.h 13.1 (RC International) 91/02/02 */
Names: »msg.h«
└─⟦50656ff4a⟧ Bits:30010538 TX 3.1 Coldstart
└─⟦bbf173f5c⟧ »0004«
└─⟦this⟧ »./usr/include/sys/msg.h«
/* @(#)msg.h 13.1 (RC International) 91/02/02 */
#ifndef _MSG_H
#define _MSG_H
/*
** IPC Message Facility.
*/
/*
** Permission Definitions.
*/
#define MSG_R 0400 /* read permission */
#define MSG_W 0200 /* write permission */
/*
** Message Operation Flags.
*/
#define MSG_NOERROR 010000 /* no error if big message */
/*
** Structure Definitions.
*/
/*
** There is one msg queue id data structure for each q in the system.
*/
struct msqid_ds {
struct ipc_perm msg_perm; /* operation permission struct */
int msg_cbytes; /* current # bytes on q */
int msg_qnum; /* # of messages on q */
int msg_qbytes; /* max # of bytes on q */
pid_t msg_lspid; /* pid of last msgsnd */
pid_t msg_lrpid; /* pid of last msgrcv */
time_t msg_stime; /* last msgsnd time */
time_t msg_rtime; /* last msgrcv time */
time_t msg_ctime; /* last change time */
};
/*
** User message buffer template for msgsnd and msgrecv system calls.
*/
struct msgbuf {
long mtype; /* message type */
char mtext[1]; /* message text */
};
#if defined(__STDC__)
int msgctl(int, int, ...);
int msgget(key_t, int);
int msgrcv(int, void *, size_t, long, int);
int msgsnd(int, void *, size_t, int);
#else /* Not __STDC__ */
int msgctl(), msgget(), msgrcv(), msgsnd();
#endif /* __STDC__ */
#endif /* _MSG_H */