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任何人都可以请帮我指出我的程序中有什么错误?消息队列:msgsnd失败:无效参数
由于提前, kingsmasher1
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <string.h>
#include <errno.h>
typedef struct msgbuf {
long mtype; /* message type, must be > 0 */
char mtext[15]; /* message data */
} msgbuf;
int main() {
key_t key;
int msqid, pid, length;
msgbuf buf;
msqid=msgget(IPC_PRIVATE,IPC_CREAT);
if(msqid==-1){
perror("msgget failed");
return;
}
else {
printf("msgget succeeded. ID:%u",msqid);
}
pid=fork();
if(pid==-1) {
perror("fork failed\n");
}
buf.mtype=1;
strcpy(buf.mtext, "This is a test message");
length=sizeof(buf.mtext);
if(msgsnd(msqid,&buf,length,0)!=0) {
perror("msgsnd failed:\n");
}
else {
printf("msgsnd succeeded\n");
}
}
输出: 的msgsnd失败:无效的参数
谢谢,它解决了:-) – kingsmasher1 2011-03-07 16:17:10