r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000280), 0x0, 0x0)
ioctl$TIOCPKT(r0, 0x5420, &(0x7f0000000080)=0x80)
ioctl$TCSETAF(r0, 0x5408, &(0x7f00000000c0)={0x0, 0x0, 0x0, 0x0, 0x0, "d3b465c8a812ec39"})
r1 = fcntl$dupfd(r0, 0x0, r0)
read$ptp(r1, &(0x7f0000000140)=""/31, 0x1f)