Open System Services System Calls Reference Manual (G06.29+, H06.08+, J06.03+)

System Functions (k - m) msgctl(2)

• All processes for the relevant message server have failed.

• The message queue corresponding to the value speciﬁed as the msqid

parameter has been removed from the system.

[EMSGQNOTRUNNING]

The message queue server associated with the message queue identiﬁer is not

running.

[ENOMEM] Memory allocation failed and one possibility is that the amount of memory con-

sumed by the message queues exceeds 16GB.

[ENOTOSS] The calling process is not an OSS process. The requested operation is not sup-

ported from the Guardian environment.

[EPERM] One of the following conditions exists:

• The cmd parameter is equal to either IPC_RMID or IPC_SET, and the

calling process does not have appropriate privileges.

• The cmd parameter is equal to IPC_SET, and an attempt is being made

to increase the value of the msg_qbytes ﬁeld when the effective user ID

of the calling process does not have appropriate privileges.

RELATED INFORMATION

Functions: msgget(2), msgrcv(2), msgsnd(2).

STANDARDS CONFORMANCE

The following are HP extensions to the XPG4 Version 2 speciﬁcation:

• The IPC_SETNONFT value for the cmd parameter is supported.

• The errno values [EFAULT], [EMSGQNOTRUNNING], [ENOMEM], and [ENOTOSS]

can be returned.

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