test11_9.txt

来自「Linux下的C语言编程」· 文本 代码 · 共 53 行

TXT
53
字号
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <stdio.h>
#include <string.h>

int main(void)
{
	key_t unique_key;
	int msgid;
	int status;
	char str1[ ]={"test message:hello!"};
	char str2[ ]={"test message:goodbye!"};

	struct msgbuf
	{
        	long msgtype;
        	char msgtext[1024];
	}sndmsg, rcvmsg;

    	if(msgid=msgget(IPC_PRIVATE, 0666)==-1)
    	{
        	printf("msgget error!\n");
        	exit(254);
    	}

	sndmsg.msgtype=111;
	sprintf(sndmsg.msgtext, str1);
	if(msgsnd(msgid, (struct msgbuf *)&sndmsg, sizeof(str1)+1, 0)==-1)
	{
    		printf("msgsnd error!\n");
    		exit(254);
	}

	sndmsg.msgtype=222;
	sprintf(sndmsg.msgtext, str2);
	if(msgsnd(msgid, (struct msgbuf *)&sndmsg, sizeof(str2)+1, 0)==-1)
	{
    		printf("msgsnd error!\n");
    		exit(254);
	}

	if(status=msgrcv(msgid, (struct msgbuf *)&rcvmsg, 80, 222, IPC_NOWAIT)==-1)
	{
    		printf("msgrcv error!\n");
    		exit(254);
	}
	printf("The received message: %s. \n", rcvmsg.msgtext);

	msgctl(msgid, IPC_RMID, 0);
	exit(0);
}

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