[shakna]

    int success = NULL;

    if(success = malloc(...)) {
    }
    if(success = malloc(...)) {
    }
    if(success = malloc(...)) {
    }

[slavik81]

That will result in undefined behaviour if the value returned by malloc is greater than INT_MAX. If you really need an integer, use intptr_t. But, generally it makes more sense to just use a pointer.

    char* p = NULL;
    if (p = malloc(...)) {
      ...
    }