HP-UX Reference (11i v3 07/02) - 2 System Calls (vol 5)

msgop(2) msgop(2)

[EACCES] Operation permission is denied to the calling process.

[EAGAIN] The message cannot be sent for one of the reasons cited above and (msgﬂg

IPC_NOWAIT

) is true.

[EFAULT] msgp points to an illegal address. The reliable detection of this error is implementa-

tion dependent.

[EIDRM] The message queue identiﬁer msqid has been removed from the system.

[EINTR]

msgsnd() was interrupted by a signal.

[EINVAL] msqid is not a valid message queue identiﬁer.

[EINVAL] mtype is less than 1.

[EINVAL] msgsz is less than zero or greater than the system-imposed limit.