PATHCTL
if ((pathctl = strdup(PATHCTL)) == NULL) {
err(1, "initializing sysctl name %s", PATHCTL);
if (sysctlnametomib(PATHCTL, mib, &miblen) != 0)
err(1, "sysctlnametomib(%s)", PATHCTL);
err(1, "getting path: sysctl(%s) - size only", PATHCTL);
err(1, "getting path: sysctl(%s)", PATHCTL);