Stdlib in legato project

Hello.
I used mangoh green with wp8540.
i connect to green whith ssh and creat file “/home/root/tt”
I creat project in legato.
and i want read this file. But i not open him.
my code:
COMPONENT_INIT
{
LE_INFO(“Hello, world.”);

FILE* fd;

fd = fopen ("/home/root/tt", "r"); 

if (fd == 0) {
	LE_INFO ("ERR OPEN\n");
	return;
}

}

What is problem?
How to fix it?

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