r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000840), 0x2, 0x0)
readv(r0, &(0x7f0000000200)=[{&(0x7f0000000000)=""/99, 0x63}], 0x1)
writev(r0, &(0x7f00000019c0)=[{&(0x7f0000000980)='%', 0xfdef}], 0x1)