mount_unmount
mount_unmount (S_MOUNT, printer, NB(form), NB(pwheel));
extern void mount_unmount();
mount_unmount (S_MOUNT, printer, NB(form), NB(pwheel));
void mount_unmount();
mount_unmount (S_UNMOUNT, printer, NAME_NONE, NAME_ANY);
mount_unmount (S_UNMOUNT, printer, NAME_NONE, "");
mount_unmount (S_UNMOUNT, printer, "", NAME_ANY);