r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x2, 0x0)
writev(r0, &(0x7f0000000080)=[{&(0x7f0000000180)='E', 0x20000181}], 0x1)
ioctl$TCFLSH(r0, 0x540b, 0x2)