r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TIOCSPTLCK(r0, 0x5420, &(0x7f00000000c0)=0x1)
ioctl$TIOCSTI(r0, 0x5412, &(0x7f00000001c0))
readv(r0, &(0x7f0000001840)=[{&(0x7f0000001440)=""/22, 0x16}], 0x1)