r0 = openat(0xffffffffffffff9c, &(0x7f00000002c0)='./file1\x00', 0x101142, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f00000001c0)='./cgroup.net/cgroup.procs\x00', 0x0, 0x0)
ppoll(0x0, 0x0, 0x0, 0x0, 0x0)
sendfile(r0, r1, 0x0, 0x100000001)