checkmntlist
checkmntlist(name, &mntfromname, &mntonname, &type);
checkmntlist(getdevpath(name, 0), &mntfromname,
checkmntlist(name, &mntfromname, &mntonname, &type);
checkmntlist(name, &mntfromname,
checkmntlist(realname,
void checkmntlist (char *, char **, char **, char **);