linux网络编程-进程间通信——消息队列

 1 #include<stdio.h>
 2 #include<string.h>
 3 #include<sys/types.h>
 4 #include<sys/ipc.h>
 5 #include<sys/msg.h>
 6 int main()
 7 {
 8     int ret = -1;
 9     key_t key;
10     char *msgpath = "./ipc/";
11     int msgFlags, msg_id;
12     
13     int msg_sflags, msg_rflags;
14     struct msgmbuf{
15         long int mtype;
16         char mtext[10];
17     };
18 
19     struct msqid_ds msg_info;
20     struct msgmbuf msg_mbuf;
21 
22     key = ftok(msgpath,'b');
23     if(key!=-1)
24     {
25         printf("ftok 成功！key = %d\n", key);
26     }
27     else
28     {
29         printf("ftok 失败！key = %d\n", key);
30     }
31     
32     msgFlags = IPC_CREAT|IPC_EXCL;
33     msg_id = msgget(key,msgFlags|0666);
34     if(-1 != msg_id)
35     {
36         printf("消息建立成功，msgId = %d\n", msg_id);
37     }
38     else
39     {
40         printf("msgget 失败, msgId = %d\n", msg_id);
41         return 0;
42     }
43     
44     
45     msg_sflags = IPC_NOWAIT;
46     msg_mbuf.mtype = 10;
47     memcpy(msg_mbuf.mtext,"1", sizeof("1"));
48     printf("msgLen = %d\n", sizeof("1"));
49     ret = msgsnd(msg_id, &msg_mbuf, sizeof(msg_mbuf.mtext), msg_sflags);
50     if(-1 == ret)
51     {
52         printf("消息发送失败\n");
53     }
54 
55     msg_rflags = IPC_NOWAIT|MSG_NOERROR;
56     
57     ret = msgrcv(msg_id, &msg_mbuf,10,10,msg_rflags);
58     if(-1 == ret)
59     {
60         printf("消息接收失败\n");
61     }    
62     else
63     {
64         printf("消息接收成功\n");
65     }
66 
67 
68     printf("--1--\n");
69     
70     ret = msgctl(msg_id, IPC_RMID, NULL);
71     if(-1 == ret)
72     {
73         printf("删除消息失败\n");
74         return 0;
75     }
76     else
77     {
78         printf("删除消息成功\n");
79     }
80 
81     return 0;    
82 }

标签：linux,编程,mbuf,ret,间通信,key,printf,msg,id
来源： https://www.cnblogs.com/zzx2bky/p/15913767.html