fprintf(f, " %s", addr->address);
if (parent) fprintf(f, " <%s>", parent);
if (addr->basic_errno > 0) fprintf(f, ": %s", strerror(addr->basic_errno));
fprintf(f, " %s", addr->address);
if (parent) fprintf(f, " <%s>", parent);
if (addr->basic_errno > 0) fprintf(f, ": %s", strerror(addr->basic_errno));