CMDDIR
len + 1 + (cmd ? (strlen(CMDDIR) + 1) : 0))
(void) sm_strlcat2(newcmdbuf, CMDDIR, "/", sizeof newcmdbuf);
if (strlen(par) > (sizeof newcmdbuf - sizeof CMDDIR - 2))
if (sm_strlcpyn(cmdbuf, sizeof cmdbuf, 3, CMDDIR,
#ifndef CMDDIR