Assign unique random integers in an array (C)

im struggling with this so long, i can fill my array with random numbers but they are not unique. I can't spot the problem in my code :( Can you help me? Thanks

void fillArray(int *p)
{
    int i;
    for(i=0;i<N;i++)
        p[i]=getUniqueNumber(p,i);  
}

int getUniqueNumber(int *p, int i)
{
    int x,j,found;
    do
    {
        x=rand()%100000 + 1;
        found=0;
        j=0;
        while(j<=i && found==0)
        {
            if(p[i]==x)
                found=1;
            else
                j++;
        }
    } while(found==1);
    return x;
}