linux 消息序列（进程间通信）
#include <stdlib.h>#include <stdio.h>#include <string.h>#include <errno.h>#include <unistd.h>#include <sys/types.h>#include <sys/ipc.h>#include <sys/msg.h>//需要自己定义的消息队列结构struct msgStuct{ long int msgType; char strMsg[1024];};intmain (){ int msgid; struct msgStuct msg_data; //接收消息优先级 long int msgPriority = 0;//从队列中取第一个 //创建一个消息队列 if ((msgid= msgget ((key_t) 2234, 0666 | IPC_CREAT)) == -1)//类似open()创建一个文件返回它的文件描述符，这里是消息序列 { perror ("msgget failed with error"); exit (EXIT_FAILURE); } while (1) {//接收消息 if (msgrcv (msgid, (void *) &msg_data, 1024, msgPriority, 0) == -1){ perror ("msgrcv failed with error"); exit (EXIT_FAILURE);} printf ("Received message: %s", msg_data.strMsg); if (strncmp (msg_data.strMsg, "end", 3) == 0){ break;} } //删除消息队列 if (msgctl (msgid, IPC_RMID, 0) == -1) { fprintf (stderr, "delete messagequeue error\n"); exit (EXIT_FAILURE); } exit (EXIT_SUCCESS);}