msgrcv返回7是怎么回事？

[aozhi]

调用
msgrcv(id,&buf,sizeof(buf的类型)-sizeof(int),0,0);
返回了-1

errno=7
argument list too long.

会是什么原因呢？
谢谢

[mymtom]

int
msgrcv(int msqid, void *msgp, size_t msgsz, long msgtyp, int msgflg);

消息字节数超过了第三个参数(msgsz)，而且没有设置MSG_NOERROR标志

[E2BIG] A matching message was received, but its size was
greater than msgsz and the MSG_NOERROR flag was not
set in msgflg.

[cy330206]

http://blog.sina.com.cn/s/blog_510f720a01008tzs.html
楼主看看这个链接，

[aozhi]

[Quote=引用 1 楼 mymtom 的回复:]
int
msgrcv(int msqid, void *msgp, size_t msgsz, long msgtyp, int msgflg);

消息字节数超过了第三个参数(msgsz)，而且没有设置MSG_NOERROR标志

[E2BIG] A matching message was received, but its size was
greater than msgsz ……
[/Quote]

在以前的solaris上好像不出错，到Linux上就出错了，奇怪。