checkvfsname
if (checkvfsname(fs->fs_vfstype, vfslist))
if (checkvfsname(mntbuf[i].f_fstypename,
int checkvfsname(const char *, const char **);
if (checkvfsname(mntbuf[mnts].f_fstypename, typelist))
if (checkvfsname(type, typelist))