ISPTM             132 maint/gnulib/lib/ptsname_r.c     ioctl_arg.ic_cmd = ISPTM;
ISPTM             170 maint/gnulib/lib/ptsname_r.c     ret = ioctl (fd, ISPTM, &dev);
ISPTM             173 maint/gnulib/lib/ptsname_r.c     ret = ioctl (fd, ISPTM, NULL);