confstr
size_t len = confstr(_CS_PATH, (char *) 0, 0);
confstr(_CS_PATH, new = alloc(len + 1, APERM), len + 1);
size_t confstr(int, char *, size_t);
__weak_alias(confstr,_confstr)
confstr(int name, char *buf, size_t len)
slen = confstr((int)cp->value, NULL, 0);
if (confstr((int)cp->value, sval, slen) == 0) {