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msg.h(3head) [opensolaris man page]

msg.h(3HEAD)							      Headers							      msg.h(3HEAD)

NAME
msg.h, msg - message queue structures SYNOPSIS
#include <sys/msg.h> DESCRIPTION
The <sys/msg.h> header defines the following data types through typedef: msgqnum_t used for the number of messages in the message queue msglen_t used for the number of bytes allowed in the message queue These types are unsigned integer types that are able to store values at least as large as a type unsigned short. The <sys/msg.h> header defines the following constant as a message operation flag: MSG_NOERROR no error if big message The msqid_ds structure contains the following members: struct ipc_perm msg_perm Operation permission structure. msgqnum_t msg_qnum Number of messages currently on queue. msglen_t msg_qbytes Maximum number of bytes allowed on queue. pid_t msg_lspid Process ID of last msgsnd(2). pid_t msg_lrpid Process ID of last msgrcv(2). time_t msg_stime Time of last msgsnd(). time_t msg_rtime Time of last msgrcv(). time_t msg_ctime Time of last change. The pid_t, time_t, key_t, size_t, and ssize_t types are defined as described in <sys/types.h>. See types(3HEAD). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
msgctl(2), msgget(2), msgrcv(2), msgsnd(2), ipc.h(3HEAD), types.h(3HEAD), attributes(5), standards(5) SunOS 5.11 10 Sep 2004 msg.h(3HEAD)

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<sys/msg.h>(P)						     POSIX Programmer's Manual						    <sys/msg.h>(P)

NAME
sys/msg.h - XSI message queue structures SYNOPSIS
#include <sys/msg.h> DESCRIPTION
The <sys/msg.h> header shall define the following data types through typedef: msgqnum_t Used for the number of messages in the message queue. msglen_t Used for the number of bytes allowed in a message queue. These types shall be unsigned integer types that are able to store values at least as large as a type unsigned short. The <sys/msg.h> header shall define the following constant as a message operation flag: MSG_NOERROR No error if big message. The msqid_ds structure shall contain the following members: struct ipc_perm msg_perm Operation permission structure. msgqnum_t msg_qnum Number of messages currently on queue. msglen_t msg_qbytes Maximum number of bytes allowed on queue. pid_t msg_lspid Process ID of last msgsnd (). pid_t msg_lrpid Process ID of last msgrcv (). time_t msg_stime Time of last msgsnd (). time_t msg_rtime Time of last msgrcv (). time_t msg_ctime Time of last change. The pid_t, time_t, key_t, size_t, and ssize_t types shall be defined as described in <sys/types.h> . The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided. int msgctl(int, int, struct msqid_ds *); int msgget(key_t, int); ssize_t msgrcv(int, void *, size_t, long, int); int msgsnd(int, const void *, size_t, int); In addition, all of the symbols from <sys/ipc.h> shall be defined when this header is included. The following sections are informative. APPLICATION USAGE
None. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
<sys/ipc.h> , <sys/types.h> , msgctl(), msgget(), msgrcv(), msgsnd() COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html . IEEE
/The Open Group 2003 <sys/msg.h>(P)
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