void CreateLinkIfNeeded()

in dotnet/tools/common/manifest.c [226:275]
45 lines of code
12 McCabe index (conditional complexity)

void CreateLinkIfNeeded(const char *target, const char *toCreate)
{
    int result;
    char *p;

    if (access(target, F_OK) == -1)
    {
        printf("File %s does not exist\n", target);
        exit(-1);
    }

    p = strrchr(toCreate, '/');
    if (p == NULL)
    {
        printf("Error on linking %s to %s. toCreate doesn't contain '/'\n", toCreate, target);
        exit(-1);
    }

    unlink(toCreate);

    if (strcmp(p, "/mono") == 0 || strcmp(p, "/dotnet") == 0)
        result = symlink(target, toCreate);
    else
    {
        result = link(target, toCreate);
        if (result != 0 && errno == EXDEV)
        {
            // Cross-device hardlinks are not possible. Fallback to a symlink.
            result = symlink(target, toCreate);
        }
    }
    if (result != 0)
    {
        int error = errno;
        if (error == EEXIST)
            return;
        if (error == EPERM)
        {
            result = symlink(target, toCreate);
            if (result == 0)
                return;
            error = errno;
        }
        if (error != EEXIST)
        {
            printf("Error %d on linking %s to %s\n", error, toCreate, target);
            exit(-1);
        }
    }
}