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10 .TH MSG.H 3HEAD "Sep 10, 2004"
12 msg.h, msg \- message queue structures
16 #include <\fBsys/msg.h\fR>
22 The <\fBsys/msg.h\fR> header defines the following data types through
30 used for the number of messages in the message queue
39 used for the number of bytes allowed in the message queue
44 These types are unsigned integer types that are able to store values at least
45 as large as a type unsigned short.
48 The <\fBsys/msg.h\fR> header defines the following constant as a message
53 \fB\fBMSG_NOERROR\fR\fR
56 no error if big message
61 The \fBmsqid_ds\fR structure contains the following members:
65 struct ipc_perm msg_perm Operation permission structure.
66 msgqnum_t msg_qnum Number of messages currently on
68 msglen_t msg_qbytes Maximum number of bytes allowed
70 pid_t msg_lspid Process ID of last msgsnd(2).
71 pid_t msg_lrpid Process ID of last msgrcv(2).
72 time_t msg_stime Time of last \fBmsgsnd()\fR.
73 time_t msg_rtime Time of last \fBmsgrcv()\fR.
74 time_t msg_ctime Time of last change.
80 The \fBpid_t\fR, \fBtime_t\fR, \fBkey_t\fR, \fBsize_t\fR, and \fBssize_t\fR
81 types are defined as described in <\fBsys/types.h\fR>. See \fBtypes\fR(3HEAD).
85 See \fBattributes\fR(5) for descriptions of the following attributes:
93 ATTRIBUTE TYPE ATTRIBUTE VALUE
95 Interface Stability Standard
101 \fBmsgctl\fR(2), \fBmsgget\fR(2), \fBmsgrcv\fR(2), \fBmsgsnd\fR(2),
102 \fBipc.h\fR(3HEAD), \fBtypes.h\fR(3HEAD), \fBattributes\fR(5),