validmod
static FILE *validmod(char *, int *);
tfp = validmod(module_name, &openerr);
tfp = validmod(module, &openerr);
if ((tfp = validmod(strval, &oe)) == NULL) {
if ((tfp = validmod(modnames[x], &openerr)) == NULL) {
tfp = validmod(module, &openerr);