Content-type: text/html Man page of msg.h

msg.h

Section: Headers (3HEAD)
Updated: 10 Sep 2004
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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 TYPEATTRIBUTE VALUE
Interface StabilityStandard

 

SEE ALSO

msgctl(2), msgget(2), msgrcv(2), msgsnd(2), ipc.h(3HEAD), types.h(3HEAD), attributes(5), standards(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
ATTRIBUTES
SEE ALSO

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Time: 02:37:12 GMT, October 02, 2010