dos2unixchr
c = dos2unixchr(tmpbuf, __DECONST(const u_char **, &dn), &i,
c = dos2unixchr(tmpbuf, __DECONST(const u_char **, &dn),
static u_char * dos2unixchr(u_char *, const u_char **, size_t *, int, struct msdosfsmount *);