expandname
arcn->nlen = expandname(arcn->name, sizeof(arcn->name),
arcn->ln_nlen = expandname(arcn->ln_name, sizeof(arcn->ln_name),
static int expandname(char *, size_t, char **, size_t *, const char *, size_t);
arcn->nlen = expandname(dest, sizeof(arcn->name) - cnt,
arcn->ln_nlen = expandname(arcn->ln_name,