我如何使用photoshop在Mac OS X的过滤器插件中打开文件?

I used the function system("open file"), it works well in any other program. For example, system("open /tmp/1.psd"), this code can use photoshop open the file 1.psd . But it just don't work in my photoshop plugin program. How can I use photoshop filter plugin to open a file in Mac OS X? Now I just want to try other way to open a file in Mac OS X. In windows, the shellExecute works well. I have read the following links I used the function system("open file"), it wor