r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TIOCSPTLCK(r0, 0x5420, &(0x7f0000000040)=0x1)
ioctl$TIOCSTI(r0, 0x5412, &(0x7f00000000c0))
readv(r0, &(0x7f0000001780)=[{&(0x7f0000000180)=""/124, 0x7c}], 0x1)