r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TIOCPKT(r0, 0x5420, &(0x7f0000000080)=0x3ff)
ioctl$TCSETAW(r0, 0x5407, &(0x7f0000000040)={0x0, 0x0, 0x0, 0x0, 0x0, "e6400200"})
readv(r0, &(0x7f0000001140)=[{&(0x7f0000000000)=""/143, 0x8f}], 0x1)