fair pseudo-random number generation in C

random.c

int random(int min, int max) {
    if(min == max) return min;
    if(min > max) {
        int tmp = max;
        max = min;
        min = tmp;
    }

    int range = max - min + 1;
    int randMax = RAND_MAX - ((RAND_MAX - range + 1) % range);

    int rnd;
    do {
        rnd = rand();
    } while(rnd > randMax);

    return (rnd % range) + min;
}

Note: the function may need to be named something other than random.