TZeqlen
static char const TZeq[TZeqlen] = "TZ=";
sumsize(TZeqlen, fakeenv0size)));
to += strncmp(*e, TZeq, TZeqlen) != 0;
env[0] = memcpy(to + 1, TZeq, TZeqlen);
memcpy(env[0] + TZeqlen, val, valsize);