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| #include <stdio.h>
| #include <string.h>
| #include <errno.h>
| #include <unistd.h>
| #include <stdlib.h>
|
| #include <sys/types.h>
| #include <sys/ipc.h>
| #include <sys/msg.h>
|
| #define FTOK_PATH "/dev/zero"
| #define FTOK_PROJID 0x22
|
| typedef struct s_msgbuf
| {
| long mtype;
| char mtext[512];
| } t_msgbuf;
|
| int main(int argc, char **argv)
| {
| key_t key;
| int msgid;
| t_msgbuf msgbuf;
| int msgtype;
| int i;
|
| if( (key=ftok(FTOK_PATH, FTOK_PROJID)) < 0 )
| {
| printf("ftok() get IPC token failure: %s\n", strerror(errno));
| return -1;
| }
|
| msgid = msgget(key, IPC_CREAT|0666);
| if( msgid < 0)
| {
| printf("shmget() create shared memroy failure: %s\n", strerror(errno));
| return -2;
| }
|
| msgtype = (int)key;
| printf("key[%d] msgid[%d] msgypte[%d]\n", (int)key, msgid, msgtype);
|
| for(i=0; i<4; i++)
| {
| msgbuf.mtype = msgtype;
| strcpy(msgbuf.mtext,"Ping");
|
| if( msgsnd(msgid, &msgbuf, sizeof(msgbuf.mtext), IPC_NOWAIT) < 0)
| {
| printf("msgsnd() send message failure: %s\n", strerror(errno));
| break;
| }
| printf("Send message: %s\n", msgbuf.mtext);
|
| sleep(1);
| }
|
| msgctl(msgid, IPC_RMID, NULL);
|
| return 0;
| }
|
|
