r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
ioctl$TIOCPKT(r0, 0x5420, &(0x7f0000000140)=0x7)
poll(&(0x7f0000000100)=[{r0}], 0x1, 0x0)