February 2020
Beginner to intermediate
616 pages
15h 16m
English
Content preview from Practical C Programming
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msgsnd()
This is used for sending or delivering a message to the queue. Here is its syntax:
int msgsnd ( int msqid, struct msgbuf *msgstruc, int msgsize, int flag );
Here, we have to address the following:
- msqid: Represents the queue identifier of the message that we want to send. The queue identifier is usually retrieved by invoking the msgget function.
- msgstruc: This is a pointer to the user-defined structure. It is the mesg member that contains the message that we want to send to the queue.
- msgsize: Represents the size of the message in bytes.
- flag: Determines the action to be taken on the message. If the flag value is set to IPC_NOWAIT and if the message queue is full, the message will not be written to the queue, and the control ...
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