@hcymk2

谢谢.解决我的问题了.在man手册也看到了.

```
−0 Change xargs to expect NUL (‘‘\0’’) characters as separators, instead of spaces and newlines.
This is expected to be used in concert with the −print0 function in find(1).

```

原来在设计exargs的时候就考虑到这个问题了.


最后的命令是:

```
find . -name "*.m" -print0 | xargs -n 10 -0 grep -inrE "#define.*http" > x.txt
```

thanks again.